./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.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/nla-digbench-scaling/egcd2-ll_valuebound100.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 f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 --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 19:16:56,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:16:56,215 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:16:56,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:16:56,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:16:56,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:16:56,243 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:16:56,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:16:56,244 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:16:56,245 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:16:56,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:16:56,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:16:56,247 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:16:56,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:16:56,249 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:16:56,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:16:56,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:16:56,249 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:16:56,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:16:56,250 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:16:56,250 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:16:56,254 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:16:56,254 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:16:56,254 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:16:56,254 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:16:56,255 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:16:56,255 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:16:56,255 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:16:56,255 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:16:56,255 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:16:56,256 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:16:56,256 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:16:56,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:16:56,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:16:56,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:16:56,257 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:16:56,257 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:16:56,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:16:56,259 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:16:56,259 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:16:56,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:16:56,260 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:16:56,260 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:16:56,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:16:56,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:16:56,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:16:56,530 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:16:56,530 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:16:56,531 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-09-20 19:16:57,954 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:16:58,147 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:16:58,148 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-09-20 19:16:58,155 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9cef6fb6c/328581adbb084af2ac6e281ccb814e65/FLAG14d542c60 [2024-09-20 19:16:58,173 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9cef6fb6c/328581adbb084af2ac6e281ccb814e65 [2024-09-20 19:16:58,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:16:58,177 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:16:58,179 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:16:58,179 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:16:58,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:16:58,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586a5315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58, skipping insertion in model container [2024-09-20 19:16:58,186 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,207 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:16:58,353 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2024-09-20 19:16:58,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:16:58,386 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:16:58,397 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2024-09-20 19:16:58,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:16:58,431 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:16:58,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58 WrapperNode [2024-09-20 19:16:58,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:16:58,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:16:58,433 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:16:58,433 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:16:58,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,446 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,451 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:16:58,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:16:58,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:16:58,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:16:58,452 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:16:58,463 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,465 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,478 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 19:16:58,479 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,479 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,486 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,487 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:16:58,492 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:16:58,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:16:58,493 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:16:58,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (1/1) ... [2024-09-20 19:16:58,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:16:58,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:58,523 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 19:16:58,525 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 19:16:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:16:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:16:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:16:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:16:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:16:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:16:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:16:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:16:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:16:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:16:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:16:58,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:16:58,663 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:16:58,665 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:16:58,839 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-20 19:16:58,840 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:16:58,866 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:16:58,867 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 19:16:58,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:16:58 BoogieIcfgContainer [2024-09-20 19:16:58,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:16:58,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:16:58,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:16:58,878 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:16:58,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:16:58" (1/3) ... [2024-09-20 19:16:58,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc184a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:16:58, skipping insertion in model container [2024-09-20 19:16:58,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:16:58" (2/3) ... [2024-09-20 19:16:58,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc184a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:16:58, skipping insertion in model container [2024-09-20 19:16:58,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:16:58" (3/3) ... [2024-09-20 19:16:58,882 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2024-09-20 19:16:58,900 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:16:58,900 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:16:58,961 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:16:58,967 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;@2ac41b5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:16:58,968 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:16:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 19:16:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 19:16:58,978 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:58,979 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:58,979 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:58,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:58,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-20 19:16:58,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:58,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857398428] [2024-09-20 19:16:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:58,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:16:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:16:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:16:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:16:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:16:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:16:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:16:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 19:16:59,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857398428] [2024-09-20 19:16:59,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857398428] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:16:59,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:16:59,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:16:59,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759164086] [2024-09-20 19:16:59,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:16:59,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:16:59,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:16:59,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:16:59,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:16:59,237 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:16:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:16:59,268 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-20 19:16:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:16:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-20 19:16:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:16:59,278 INFO L225 Difference]: With dead ends: 70 [2024-09-20 19:16:59,278 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 19:16:59,283 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:16:59,287 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:16:59,287 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:16:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 19:16:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-20 19:16:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 19:16:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-20 19:16:59,331 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-20 19:16:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:16:59,332 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-20 19:16:59,332 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:16:59,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-20 19:16:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 19:16:59,337 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:16:59,337 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:16:59,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:16:59,338 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:16:59,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:16:59,338 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-20 19:16:59,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:16:59,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269605751] [2024-09-20 19:16:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:59,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:16:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:16:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:16:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:16:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:16:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:16:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:16:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:16:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 19:16:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:16:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269605751] [2024-09-20 19:16:59,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269605751] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:16:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272285279] [2024-09-20 19:16:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:16:59,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:16:59,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:16:59,666 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 19:16:59,667 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 19:16:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:16:59,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 19:16:59,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 19:17:00,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272285279] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:00,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:00,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-20 19:17:00,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102482350] [2024-09-20 19:17:00,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:00,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 19:17:00,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 19:17:00,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:17:00,205 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-20 19:17:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:00,478 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-20 19:17:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:17:00,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-20 19:17:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:00,480 INFO L225 Difference]: With dead ends: 55 [2024-09-20 19:17:00,480 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 19:17:00,480 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:17:00,484 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:00,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:17:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 19:17:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-20 19:17:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 19:17:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-20 19:17:00,510 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-20 19:17:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:00,510 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-20 19:17:00,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-20 19:17:00,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-20 19:17:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 19:17:00,512 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:00,514 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:00,531 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 19:17:00,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:00,715 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:00,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:00,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-20 19:17:00,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:00,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158469100] [2024-09-20 19:17:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:00,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:00,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27114397] [2024-09-20 19:17:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:00,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:00,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:00,749 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 19:17:00,751 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 19:17:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:00,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:17:00,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 19:17:00,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:17:00,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158469100] [2024-09-20 19:17:00,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:00,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27114397] [2024-09-20 19:17:00,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27114397] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:00,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:00,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:00,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239232225] [2024-09-20 19:17:00,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:00,834 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:00,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:00,835 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-20 19:17:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:00,883 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-20 19:17:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:00,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-20 19:17:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:00,885 INFO L225 Difference]: With dead ends: 65 [2024-09-20 19:17:00,885 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 19:17:00,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:00,887 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:00,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:00,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 19:17:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-20 19:17:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 19:17:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-20 19:17:00,907 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-20 19:17:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:00,908 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-20 19:17:00,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-20 19:17:00,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-20 19:17:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 19:17:00,911 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:00,911 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:00,928 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 19:17:01,112 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:01,113 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:01,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:01,114 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-20 19:17:01,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:01,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442211904] [2024-09-20 19:17:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:01,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:01,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715120792] [2024-09-20 19:17:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:01,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:01,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:01,146 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 19:17:01,149 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 19:17:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:01,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:17:01,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 19:17:01,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:17:01,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:01,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442211904] [2024-09-20 19:17:01,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:01,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715120792] [2024-09-20 19:17:01,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715120792] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:01,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:01,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:01,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836875681] [2024-09-20 19:17:01,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:01,301 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:01,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:01,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:01,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:01,303 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 19:17:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:01,363 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-20 19:17:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:01,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-20 19:17:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:01,366 INFO L225 Difference]: With dead ends: 61 [2024-09-20 19:17:01,366 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 19:17:01,366 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:01,368 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:01,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 19:17:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-20 19:17:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 19:17:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-20 19:17:01,389 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-20 19:17:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:01,391 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-20 19:17:01,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 19:17:01,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-20 19:17:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 19:17:01,394 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:01,396 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:01,413 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 19:17:01,599 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:01,600 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:01,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:01,600 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-20 19:17:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:01,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083608835] [2024-09-20 19:17:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:01,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834277374] [2024-09-20 19:17:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:01,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:01,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:01,633 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 19:17:01,635 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 19:17:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:01,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:17:01,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-20 19:17:01,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:17:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083608835] [2024-09-20 19:17:01,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834277374] [2024-09-20 19:17:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834277374] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:01,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:01,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:01,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857131189] [2024-09-20 19:17:01,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:01,856 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:01,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:01,857 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-20 19:17:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:01,928 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-20 19:17:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:01,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-20 19:17:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:01,930 INFO L225 Difference]: With dead ends: 65 [2024-09-20 19:17:01,931 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 19:17:01,931 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:01,932 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:01,933 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 19:17:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-20 19:17:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 19:17:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-20 19:17:01,952 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-20 19:17:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:01,953 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-20 19:17:01,953 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-20 19:17:01,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-20 19:17:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 19:17:01,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:01,955 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:01,973 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 19:17:02,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:02,156 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:02,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-20 19:17:02,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:02,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392898309] [2024-09-20 19:17:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:02,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:02,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433796494] [2024-09-20 19:17:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:02,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:02,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:02,178 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 19:17:02,180 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 19:17:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 19:17:02,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 19:17:02,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 19:17:02,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392898309] [2024-09-20 19:17:02,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433796494] [2024-09-20 19:17:02,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433796494] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:02,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:02,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-20 19:17:02,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298338703] [2024-09-20 19:17:02,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:02,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:17:02,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:17:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:17:02,435 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-20 19:17:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:02,548 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-20 19:17:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:17:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-20 19:17:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:02,551 INFO L225 Difference]: With dead ends: 90 [2024-09-20 19:17:02,551 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 19:17:02,551 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:17:02,552 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:02,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 19:17:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-20 19:17:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 19:17:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-20 19:17:02,568 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-20 19:17:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:02,568 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-20 19:17:02,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-20 19:17:02,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-20 19:17:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 19:17:02,570 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:02,570 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:02,586 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 19:17:02,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 19:17:02,775 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:02,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:02,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-20 19:17:02,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:02,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442781104] [2024-09-20 19:17:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:02,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:17:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:17:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:17:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:17:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:17:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:17:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:17:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:02,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 19:17:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:03,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 19:17:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:03,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 19:17:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:03,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 19:17:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 19:17:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442781104] [2024-09-20 19:17:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442781104] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370337868] [2024-09-20 19:17:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:03,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:03,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:03,019 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 19:17:03,020 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 19:17:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:03,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:17:03,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 19:17:03,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 19:17:03,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370337868] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:03,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:17:03,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-20 19:17:03,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390618769] [2024-09-20 19:17:03,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:03,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 19:17:03,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:03,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 19:17:03,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:17:03,230 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-20 19:17:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:03,439 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-20 19:17:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:17:03,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-20 19:17:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:03,441 INFO L225 Difference]: With dead ends: 105 [2024-09-20 19:17:03,441 INFO L226 Difference]: Without dead ends: 97 [2024-09-20 19:17:03,442 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:17:03,442 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:03,443 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:03,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-20 19:17:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-20 19:17:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-20 19:17:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-20 19:17:03,471 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-20 19:17:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:03,471 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-20 19:17:03,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-20 19:17:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-20 19:17:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 19:17:03,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:03,473 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:03,489 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 19:17:03,677 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:03,678 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:03,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-20 19:17:03,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:03,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666446618] [2024-09-20 19:17:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:03,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109836849] [2024-09-20 19:17:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:03,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:03,708 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 19:17:03,710 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 19:17:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:03,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 19:17:03,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-20 19:17:03,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:03,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:03,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666446618] [2024-09-20 19:17:03,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:03,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109836849] [2024-09-20 19:17:03,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109836849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:03,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:17:03,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-20 19:17:03,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057408029] [2024-09-20 19:17:03,928 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:03,928 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:17:03,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:17:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:17:03,929 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-20 19:17:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:04,054 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-20 19:17:04,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:17:04,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-20 19:17:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:04,056 INFO L225 Difference]: With dead ends: 123 [2024-09-20 19:17:04,056 INFO L226 Difference]: Without dead ends: 120 [2024-09-20 19:17:04,057 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:17:04,057 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:04,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-20 19:17:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-20 19:17:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-20 19:17:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-20 19:17:04,103 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-20 19:17:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:04,104 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-20 19:17:04,105 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-20 19:17:04,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-20 19:17:04,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 19:17:04,109 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:04,109 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:04,125 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 19:17:04,313 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:04,314 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:04,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:04,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-20 19:17:04,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:04,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058189769] [2024-09-20 19:17:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:04,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:04,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695241279] [2024-09-20 19:17:04,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:17:04,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:04,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:04,347 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 19:17:04,349 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 19:17:04,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:17:04,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:17:04,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 19:17:04,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-20 19:17:04,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:04,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:04,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058189769] [2024-09-20 19:17:04,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:04,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695241279] [2024-09-20 19:17:04,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695241279] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:04,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:17:04,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-20 19:17:04,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960710790] [2024-09-20 19:17:04,731 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:04,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:17:04,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:04,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:17:04,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:17:04,732 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-20 19:17:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:04,920 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-20 19:17:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:17:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-20 19:17:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:04,922 INFO L225 Difference]: With dead ends: 129 [2024-09-20 19:17:04,922 INFO L226 Difference]: Without dead ends: 127 [2024-09-20 19:17:04,922 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:17:04,923 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:04,923 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-20 19:17:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-20 19:17:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-20 19:17:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-20 19:17:04,961 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-20 19:17:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:04,962 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-20 19:17:04,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-20 19:17:04,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:04,963 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-20 19:17:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-20 19:17:04,967 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:04,967 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:04,984 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 19:17:05,168 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:05,169 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:05,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:05,169 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-20 19:17:05,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:05,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870563615] [2024-09-20 19:17:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:05,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:05,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296746955] [2024-09-20 19:17:05,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:17:05,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:05,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:05,190 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 19:17:05,191 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 19:17:05,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 19:17:05,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:17:05,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-20 19:17:05,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-20 19:17:06,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:23,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:23,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870563615] [2024-09-20 19:17:23,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:23,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296746955] [2024-09-20 19:17:23,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296746955] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:23,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:17:23,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-20 19:17:23,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22440133] [2024-09-20 19:17:23,379 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:23,380 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:17:23,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:23,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:17:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-09-20 19:17:23,381 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-20 19:17:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:24,182 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-20 19:17:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:17:24,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-20 19:17:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:24,186 INFO L225 Difference]: With dead ends: 133 [2024-09-20 19:17:24,187 INFO L226 Difference]: Without dead ends: 131 [2024-09-20 19:17:24,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=163, Invalid=706, Unknown=1, NotChecked=0, Total=870 [2024-09-20 19:17:24,188 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:24,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:17:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-20 19:17:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-20 19:17:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-20 19:17:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-20 19:17:24,224 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-20 19:17:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:24,225 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-20 19:17:24,225 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-20 19:17:24,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-20 19:17:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-20 19:17:24,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:24,227 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:24,248 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 19:17:24,430 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 19:17:24,431 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:24,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:24,431 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-20 19:17:24,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:24,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673699654] [2024-09-20 19:17:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:24,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:24,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681490998] [2024-09-20 19:17:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:24,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:24,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:24,449 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 19:17:24,453 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 19:17:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:24,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 19:17:24,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-20 19:17:24,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-20 19:17:25,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673699654] [2024-09-20 19:17:25,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681490998] [2024-09-20 19:17:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681490998] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:25,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:25,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-20 19:17:25,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991004621] [2024-09-20 19:17:25,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:25,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:17:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:17:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:17:25,587 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 19:17:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:28,626 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-20 19:17:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 19:17:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-20 19:17:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:28,629 INFO L225 Difference]: With dead ends: 229 [2024-09-20 19:17:28,629 INFO L226 Difference]: Without dead ends: 225 [2024-09-20 19:17:28,630 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:17:28,631 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:28,631 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-20 19:17:28,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-20 19:17:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-20 19:17:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-20 19:17:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-20 19:17:28,723 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-20 19:17:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:28,724 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-20 19:17:28,724 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 19:17:28,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-20 19:17:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-20 19:17:28,725 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:28,725 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:28,741 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 19:17:28,926 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 19:17:28,926 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:28,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-20 19:17:28,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083523191] [2024-09-20 19:17:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:28,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:17:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:17:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:17:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:17:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:17:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:17:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:17:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 19:17:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 19:17:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 19:17:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 19:17:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-20 19:17:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 19:17:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-20 19:17:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 19:17:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-20 19:17:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-20 19:17:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083523191] [2024-09-20 19:17:29,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083523191] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:29,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:29,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169255444] [2024-09-20 19:17:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:29,073 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:29,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:29,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:29,074 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-20 19:17:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:29,208 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-20 19:17:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:17:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-20 19:17:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:29,212 INFO L225 Difference]: With dead ends: 275 [2024-09-20 19:17:29,212 INFO L226 Difference]: Without dead ends: 201 [2024-09-20 19:17:29,213 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:17:29,216 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:29,216 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-20 19:17:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-20 19:17:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-20 19:17:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-20 19:17:29,294 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-20 19:17:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:29,294 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-20 19:17:29,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-20 19:17:29,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-20 19:17:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-20 19:17:29,296 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:29,296 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:29,296 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-20 19:17:29,296 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:29,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-20 19:17:29,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:29,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236780876] [2024-09-20 19:17:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:29,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:29,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482906049] [2024-09-20 19:17:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:29,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:29,325 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 19:17:29,334 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 19:17:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:29,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-20 19:17:29,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-20 19:17:31,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:31,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236780876] [2024-09-20 19:17:31,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482906049] [2024-09-20 19:17:31,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482906049] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:31,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:17:31,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-20 19:17:31,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095693280] [2024-09-20 19:17:31,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:31,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 19:17:31,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 19:17:31,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:17:31,244 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-20 19:17:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:31,878 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-09-20 19:17:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 19:17:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-20 19:17:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:31,882 INFO L225 Difference]: With dead ends: 201 [2024-09-20 19:17:31,882 INFO L226 Difference]: Without dead ends: 199 [2024-09-20 19:17:31,883 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:17:31,883 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:31,883 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:17:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-20 19:17:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-20 19:17:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 80 states have call successors, (80), 16 states have call predecessors, (80), 15 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-20 19:17:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-09-20 19:17:31,955 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-09-20 19:17:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:31,955 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-09-20 19:17:31,955 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-20 19:17:31,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-09-20 19:17:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-20 19:17:31,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:31,957 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:31,973 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 19:17:32,161 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:32,162 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:32,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-20 19:17:32,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:32,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951679252] [2024-09-20 19:17:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:32,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:17:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:17:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:17:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:17:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:17:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:17:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:17:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 19:17:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 19:17:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 19:17:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 19:17:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-20 19:17:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 19:17:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-20 19:17:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 19:17:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-20 19:17:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-20 19:17:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-20 19:17:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-20 19:17:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 19:17:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-20 19:17:32,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:32,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951679252] [2024-09-20 19:17:32,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951679252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:32,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169639127] [2024-09-20 19:17:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:32,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:32,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:32,362 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 19:17:32,364 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 19:17:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:32,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:17:32,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-20 19:17:32,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-20 19:17:32,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169639127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:32,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:17:32,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-20 19:17:32,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537204523] [2024-09-20 19:17:32,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:32,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:17:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:32,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:17:32,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:17:32,549 INFO L87 Difference]: Start difference. First operand 197 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-20 19:17:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:32,768 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-09-20 19:17:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:17:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-20 19:17:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:32,770 INFO L225 Difference]: With dead ends: 227 [2024-09-20 19:17:32,770 INFO L226 Difference]: Without dead ends: 215 [2024-09-20 19:17:32,771 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:17:32,771 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:32,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-20 19:17:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-20 19:17:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-20 19:17:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-20 19:17:32,832 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-20 19:17:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:32,833 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-20 19:17:32,833 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-20 19:17:32,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-20 19:17:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-20 19:17:32,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:32,835 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:32,853 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 19:17:33,035 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 19:17:33,035 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:33,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-20 19:17:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:33,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641080627] [2024-09-20 19:17:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:33,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843587843] [2024-09-20 19:17:33,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:17:33,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:33,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:33,071 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 19:17:33,074 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 19:17:33,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:17:33,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:17:33,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 19:17:33,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-20 19:17:33,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:33,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:33,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641080627] [2024-09-20 19:17:33,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:33,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843587843] [2024-09-20 19:17:33,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843587843] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:33,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:17:33,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-20 19:17:33,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605514583] [2024-09-20 19:17:33,517 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:33,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:17:33,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:17:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:17:33,518 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-20 19:17:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:33,734 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-20 19:17:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:17:33,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-20 19:17:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:33,737 INFO L225 Difference]: With dead ends: 230 [2024-09-20 19:17:33,737 INFO L226 Difference]: Without dead ends: 227 [2024-09-20 19:17:33,738 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:17:33,738 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:33,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 290 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-20 19:17:33,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-20 19:17:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-20 19:17:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-20 19:17:33,822 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-20 19:17:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:33,823 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-20 19:17:33,823 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-20 19:17:33,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-20 19:17:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-20 19:17:33,825 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:33,825 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:33,841 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 19:17:34,025 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 19:17:34,026 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:34,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:34,026 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-20 19:17:34,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:34,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478937621] [2024-09-20 19:17:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:34,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372764905] [2024-09-20 19:17:34,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:17:34,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:34,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:34,049 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 19:17:34,051 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 19:17:34,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 19:17:34,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:17:34,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 19:17:34,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-20 19:17:34,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-20 19:17:34,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478937621] [2024-09-20 19:17:34,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372764905] [2024-09-20 19:17:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372764905] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:34,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:34,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-20 19:17:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564527394] [2024-09-20 19:17:34,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:34,900 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:17:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:17:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:17:34,902 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-20 19:17:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:35,939 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-20 19:17:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:17:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-20 19:17:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:35,941 INFO L225 Difference]: With dead ends: 253 [2024-09-20 19:17:35,941 INFO L226 Difference]: Without dead ends: 251 [2024-09-20 19:17:35,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:17:35,943 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:35,943 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 19:17:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-20 19:17:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-20 19:17:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-20 19:17:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-20 19:17:36,041 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-20 19:17:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:36,042 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-20 19:17:36,042 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-20 19:17:36,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-20 19:17:36,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-20 19:17:36,043 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:36,043 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:36,057 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 19:17:36,244 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 19:17:36,244 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:36,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:36,244 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-20 19:17:36,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:36,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130865614] [2024-09-20 19:17:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:36,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:36,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861486744] [2024-09-20 19:17:36,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:17:36,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:36,277 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 19:17:36,279 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 19:17:36,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:17:36,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:17:36,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 19:17:36,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-20 19:17:37,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:56,295 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_main_~s~0 c_main_~y~0)) (.cse9 (* c_main_~q~0 c_main_~x~0))) (let ((.cse1 (* c_main_~q~0 c_main_~xy~0)) (.cse0 (* c_main_~yy~0 c_main_~s~0)) (.cse2 (* c_main_~b~0 2)) (.cse3 (* c_main_~p~0 c_main_~x~0)) (.cse4 (* c_main_~r~0 c_main_~y~0)) (.cse5 (* .cse9 2)) (.cse6 (* 2 .cse10)) (.cse7 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse8 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (= (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* .cse0 2) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) (* .cse1 2) (* c_main_~p~0 c_main_~x~0 c_main_~y~0) (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~yy~0 c_main_~r~0) (* 2 (* c_main_~s~0 c_main_~y~0 c_main_~y~0)) (* (* c_main_~q~0 c_main_~x~0 c_main_~y~0) 2) (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~xy~0 c_main_~p~0))) (not (= (+ .cse2 .cse3 .cse4) (+ .cse5 .cse6 .cse7 c_main_~c~0 .cse8))) (not (= (+ .cse9 .cse10 (* c_main_~b~0 c_main_~y~0)) (+ .cse1 .cse0 c_main_~b~0))) (< (+ .cse5 c_main_~b~0 .cse6 .cse7 .cse8) (+ .cse3 .cse4 1)) (< c_main_~c~0 .cse2) (= (+ .cse3 .cse4) (+ .cse5 .cse6 .cse7 .cse8))))) is different from true [2024-09-20 19:18:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 52 refuted. 0 times theorem prover too weak. 402 trivial. 15 not checked. [2024-09-20 19:18:40,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:18:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130865614] [2024-09-20 19:18:40,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:18:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861486744] [2024-09-20 19:18:40,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861486744] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:18:40,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:18:40,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2024-09-20 19:18:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221204494] [2024-09-20 19:18:40,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:18:40,927 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 19:18:40,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:18:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 19:18:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=356, Unknown=3, NotChecked=40, Total=506 [2024-09-20 19:18:40,930 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-20 19:19:09,847 WARN L293 SmtUtils]: Spent 28.08s on a formula simplification. DAG size of input: 95 DAG size of output: 94 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:19:21,861 WARN L293 SmtUtils]: Spent 10.92s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:19:27,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:19:34,609 WARN L293 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:20:03,152 WARN L293 SmtUtils]: Spent 22.97s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:20:08,665 WARN L293 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:20:10,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:20:21,682 WARN L293 SmtUtils]: Spent 10.32s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:20:26,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:20:35,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:20:39,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:20:43,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:21:06,249 WARN L293 SmtUtils]: Spent 12.44s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 19:21:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:21:10,340 INFO L93 Difference]: Finished difference Result 318 states and 455 transitions. [2024-09-20 19:21:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 19:21:10,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 128 [2024-09-20 19:21:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:21:10,343 INFO L225 Difference]: With dead ends: 318 [2024-09-20 19:21:10,344 INFO L226 Difference]: Without dead ends: 316 [2024-09-20 19:21:10,344 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 137.0s TimeCoverageRelationStatistics Valid=381, Invalid=1025, Unknown=4, NotChecked=72, Total=1482 [2024-09-20 19:21:10,345 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 77 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 110 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:21:10,345 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 503 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 532 Invalid, 5 Unknown, 146 Unchecked, 29.9s Time] [2024-09-20 19:21:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-20 19:21:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2024-09-20 19:21:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 162 states have internal predecessors, (186), 131 states have call successors, (131), 21 states have call predecessors, (131), 20 states have return successors, (128), 126 states have call predecessors, (128), 128 states have call successors, (128) [2024-09-20 19:21:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 445 transitions. [2024-09-20 19:21:10,632 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 445 transitions. Word has length 128 [2024-09-20 19:21:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:21:10,632 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 445 transitions. [2024-09-20 19:21:10,632 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-20 19:21:10,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:21:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 445 transitions. [2024-09-20 19:21:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-20 19:21:10,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:21:10,634 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:21:10,652 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 19:21:10,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 19:21:10,835 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:21:10,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:21:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-20 19:21:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:21:10,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906886405] [2024-09-20 19:21:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:21:10,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:21:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:21:10,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793185233] [2024-09-20 19:21:10,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:21:10,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:21:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:21:10,880 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 19:21:10,883 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 19:21:10,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 19:21:10,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:21:10,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-20 19:21:10,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:21:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 102 proven. 91 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-20 19:21:12,336 INFO L327 TraceCheckSpWp]: Computing backward predicates...