./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.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 e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --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 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:46:20,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:46:20,692 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:46:20,697 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:46:20,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:46:20,718 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:46:20,720 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:46:20,720 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:46:20,721 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:46:20,721 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:46:20,721 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:46:20,722 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:46:20,722 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:46:20,724 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:46:20,724 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:46:20,724 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:46:20,724 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:46:20,724 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:46:20,725 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:46:20,725 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:46:20,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:46:20,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:46:20,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:46:20,729 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:46:20,729 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:46:20,729 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:46:20,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:46:20,730 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:46:20,730 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:46:20,730 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:46:20,730 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:46:20,730 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:46:20,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:46:20,731 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:46:20,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:46:20,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:46:20,731 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:46:20,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:46:20,732 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:46:20,732 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:46:20,732 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:46:20,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:46:20,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:46:20,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:46:20,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:46:20,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:46:20,944 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:46:20,945 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:46:20,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-10-15 14:46:22,182 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:46:22,316 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:46:22,316 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-10-15 14:46:22,323 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bac73b38a/f7471c2c861f4014a1b04dff3c9a5bee/FLAG04d64917b [2024-10-15 14:46:22,335 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bac73b38a/f7471c2c861f4014a1b04dff3c9a5bee [2024-10-15 14:46:22,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:46:22,338 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:46:22,339 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:46:22,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:46:22,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:46:22,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233dd8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22, skipping insertion in model container [2024-10-15 14:46:22,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,364 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:46:22,476 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_valuebound10.c[490,503] [2024-10-15 14:46:22,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:46:22,500 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:46:22,509 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_valuebound10.c[490,503] [2024-10-15 14:46:22,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:46:22,531 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:46:22,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22 WrapperNode [2024-10-15 14:46:22,532 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:46:22,533 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:46:22,533 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:46:22,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:46:22,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,547 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:46:22,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:46:22,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:46:22,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:46:22,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:46:22,555 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,557 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,565 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]. [2024-10-15 14:46:22,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,568 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,571 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:46:22,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:46:22,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:46:22,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:46:22,578 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (1/1) ... [2024-10-15 14:46:22,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:46:22,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:22,605 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) [2024-10-15 14:46:22,608 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 [2024-10-15 14:46:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:46:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 14:46:22,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 14:46:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:46:22,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:46:22,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:46:22,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:46:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:46:22,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:46:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:46:22,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:46:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:46:22,705 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:46:22,706 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:46:22,845 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-15 14:46:22,845 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:46:22,860 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:46:22,860 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-15 14:46:22,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:46:22 BoogieIcfgContainer [2024-10-15 14:46:22,860 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:46:22,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:46:22,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:46:22,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:46:22,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:46:22" (1/3) ... [2024-10-15 14:46:22,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d6db8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:46:22, skipping insertion in model container [2024-10-15 14:46:22,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:46:22" (2/3) ... [2024-10-15 14:46:22,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d6db8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:46:22, skipping insertion in model container [2024-10-15 14:46:22,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:46:22" (3/3) ... [2024-10-15 14:46:22,866 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2024-10-15 14:46:22,878 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:46:22,878 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:46:22,915 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:46:22,919 INFO L333 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;@1ee62ecd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:46:22,920 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:46:22,922 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) [2024-10-15 14:46:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 14:46:22,928 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:22,928 INFO L215 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] [2024-10-15 14:46:22,929 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:22,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-10-15 14:46:22,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:22,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548004693] [2024-10-15 14:46:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:46:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:46:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:46:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:46:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:46:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:46:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:46:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-15 14:46:23,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:23,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548004693] [2024-10-15 14:46:23,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548004693] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:46:23,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:46:23,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 14:46:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128285291] [2024-10-15 14:46:23,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:46:23,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 14:46:23,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 14:46:23,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:46:23,157 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) [2024-10-15 14:46:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:23,193 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-10-15 14:46:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 14:46:23,195 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 [2024-10-15 14:46:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:23,202 INFO L225 Difference]: With dead ends: 70 [2024-10-15 14:46:23,202 INFO L226 Difference]: Without dead ends: 34 [2024-10-15 14:46:23,206 INFO L431 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 [2024-10-15 14:46:23,210 INFO L432 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 [2024-10-15 14:46:23,211 INFO L433 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] [2024-10-15 14:46:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-15 14:46:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-15 14:46:23,236 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) [2024-10-15 14:46:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-10-15 14:46:23,240 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-10-15 14:46:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:23,240 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-10-15 14:46:23,240 INFO L472 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) [2024-10-15 14:46:23,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-10-15 14:46:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:46:23,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:23,242 INFO L215 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] [2024-10-15 14:46:23,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:46:23,243 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:23,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-10-15 14:46:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:23,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046730430] [2024-10-15 14:46:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:46:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:46:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:46:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:46:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:46:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:46:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:46:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:46:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:23,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046730430] [2024-10-15 14:46:23,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046730430] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:23,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920722659] [2024-10-15 14:46:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:23,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:23,546 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) [2024-10-15 14:46:23,551 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:46:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:23,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-15 14:46:23,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-15 14:46:23,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:23,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920722659] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:23,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:46:23,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-10-15 14:46:23,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16995337] [2024-10-15 14:46:23,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:23,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:46:23,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:23,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:46:23,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:46:23,992 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) [2024-10-15 14:46:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:24,198 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-10-15 14:46:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:46:24,199 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 [2024-10-15 14:46:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:24,200 INFO L225 Difference]: With dead ends: 55 [2024-10-15 14:46:24,200 INFO L226 Difference]: Without dead ends: 47 [2024-10-15 14:46:24,201 INFO L431 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 [2024-10-15 14:46:24,201 INFO L432 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:46:24,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:46:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-15 14:46:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-15 14:46:24,214 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) [2024-10-15 14:46:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-10-15 14:46:24,216 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-10-15 14:46:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:24,216 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-10-15 14:46:24,216 INFO L472 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) [2024-10-15 14:46:24,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-10-15 14:46:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 14:46:24,218 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:24,218 INFO L215 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] [2024-10-15 14:46:24,231 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 14:46:24,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:24,423 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:24,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:24,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-10-15 14:46:24,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:24,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899509563] [2024-10-15 14:46:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:24,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:24,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066734243] [2024-10-15 14:46:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:24,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:24,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:24,444 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) [2024-10-15 14:46:24,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:46:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:24,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:46:24,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-15 14:46:24,532 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:46:24,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899509563] [2024-10-15 14:46:24,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:24,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066734243] [2024-10-15 14:46:24,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066734243] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:46:24,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:46:24,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:46:24,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530006190] [2024-10-15 14:46:24,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:46:24,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:46:24,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:46:24,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:46:24,534 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) [2024-10-15 14:46:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:24,575 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-10-15 14:46:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:46:24,575 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 [2024-10-15 14:46:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:24,576 INFO L225 Difference]: With dead ends: 65 [2024-10-15 14:46:24,576 INFO L226 Difference]: Without dead ends: 63 [2024-10-15 14:46:24,577 INFO L431 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 [2024-10-15 14:46:24,577 INFO L432 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 [2024-10-15 14:46:24,578 INFO L433 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] [2024-10-15 14:46:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-15 14:46:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-10-15 14:46:24,587 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) [2024-10-15 14:46:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-10-15 14:46:24,589 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-10-15 14:46:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:24,589 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-10-15 14:46:24,589 INFO L472 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) [2024-10-15 14:46:24,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-10-15 14:46:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 14:46:24,593 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:24,593 INFO L215 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] [2024-10-15 14:46:24,606 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 14:46:24,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:24,797 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:24,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-10-15 14:46:24,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:24,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284549619] [2024-10-15 14:46:24,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:24,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:24,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061503800] [2024-10-15 14:46:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:24,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:24,827 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) [2024-10-15 14:46:24,828 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:46:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:24,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:46:24,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-15 14:46:24,943 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:46:24,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:24,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284549619] [2024-10-15 14:46:24,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:24,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061503800] [2024-10-15 14:46:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061503800] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:46:24,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:46:24,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:46:24,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670507654] [2024-10-15 14:46:24,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:46:24,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:46:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:46:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:46:24,945 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) [2024-10-15 14:46:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:24,988 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-10-15 14:46:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:46:24,989 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 [2024-10-15 14:46:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:24,991 INFO L225 Difference]: With dead ends: 61 [2024-10-15 14:46:24,991 INFO L226 Difference]: Without dead ends: 59 [2024-10-15 14:46:24,991 INFO L431 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 [2024-10-15 14:46:24,992 INFO L432 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 [2024-10-15 14:46:24,992 INFO L433 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] [2024-10-15 14:46:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-15 14:46:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-15 14:46:25,000 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) [2024-10-15 14:46:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-10-15 14:46:25,001 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-10-15 14:46:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:25,002 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-10-15 14:46:25,002 INFO L472 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) [2024-10-15 14:46:25,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-10-15 14:46:25,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-15 14:46:25,003 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:25,003 INFO L215 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] [2024-10-15 14:46:25,019 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-15 14:46:25,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:25,207 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:25,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-10-15 14:46:25,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:25,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379103858] [2024-10-15 14:46:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:25,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:25,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120731245] [2024-10-15 14:46:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:25,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:25,240 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) [2024-10-15 14:46:25,241 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:46:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:25,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:46:25,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-15 14:46:25,415 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:46:25,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:25,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379103858] [2024-10-15 14:46:25,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:25,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120731245] [2024-10-15 14:46:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120731245] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:46:25,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:46:25,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:46:25,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302405166] [2024-10-15 14:46:25,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:46:25,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:46:25,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:25,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:46:25,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:46:25,417 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) [2024-10-15 14:46:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:25,503 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-10-15 14:46:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:46:25,503 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 [2024-10-15 14:46:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:25,504 INFO L225 Difference]: With dead ends: 65 [2024-10-15 14:46:25,504 INFO L226 Difference]: Without dead ends: 63 [2024-10-15 14:46:25,505 INFO L431 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 [2024-10-15 14:46:25,505 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:46:25,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:46:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-15 14:46:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-10-15 14:46:25,517 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) [2024-10-15 14:46:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-10-15 14:46:25,518 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-10-15 14:46:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:25,518 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-10-15 14:46:25,518 INFO L472 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) [2024-10-15 14:46:25,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-10-15 14:46:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-15 14:46:25,519 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:25,519 INFO L215 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] [2024-10-15 14:46:25,532 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-15 14:46:25,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:25,724 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:25,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-10-15 14:46:25,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:25,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818958518] [2024-10-15 14:46:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:25,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551536304] [2024-10-15 14:46:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:25,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:25,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:25,751 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) [2024-10-15 14:46:25,752 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:46:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:25,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:46:25,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-15 14:46:25,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-15 14:46:25,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:25,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818958518] [2024-10-15 14:46:25,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:25,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551536304] [2024-10-15 14:46:25,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551536304] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:46:25,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:46:25,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-10-15 14:46:25,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219559250] [2024-10-15 14:46:25,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:25,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:46:25,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:25,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:46:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:46:25,951 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) [2024-10-15 14:46:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:26,037 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-10-15 14:46:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 14:46:26,038 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 [2024-10-15 14:46:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:26,039 INFO L225 Difference]: With dead ends: 90 [2024-10-15 14:46:26,039 INFO L226 Difference]: Without dead ends: 88 [2024-10-15 14:46:26,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:46:26,040 INFO L432 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 [2024-10-15 14:46:26,040 INFO L433 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] [2024-10-15 14:46:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-15 14:46:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-10-15 14:46:26,055 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) [2024-10-15 14:46:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-10-15 14:46:26,056 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-10-15 14:46:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:26,056 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-10-15 14:46:26,056 INFO L472 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) [2024-10-15 14:46:26,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-10-15 14:46:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-15 14:46:26,058 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:26,058 INFO L215 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] [2024-10-15 14:46:26,071 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 14:46:26,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 14:46:26,263 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:26,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:26,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-10-15 14:46:26,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:26,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312892786] [2024-10-15 14:46:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:26,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:46:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,371 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:46:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:46:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:46:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:46:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:46:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:46:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-15 14:46:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-15 14:46:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-15 14:46:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-15 14:46:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-15 14:46:26,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:26,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312892786] [2024-10-15 14:46:26,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312892786] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:26,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65448759] [2024-10-15 14:46:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:26,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:26,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:26,416 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) [2024-10-15 14:46:26,417 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:46:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:26,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:46:26,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-15 14:46:26,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-15 14:46:26,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65448759] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:46:26,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:46:26,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-15 14:46:26,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728360863] [2024-10-15 14:46:26,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:26,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 14:46:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 14:46:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:46:26,578 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) [2024-10-15 14:46:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:26,738 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-10-15 14:46:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:46:26,739 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 [2024-10-15 14:46:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:26,742 INFO L225 Difference]: With dead ends: 105 [2024-10-15 14:46:26,742 INFO L226 Difference]: Without dead ends: 97 [2024-10-15 14:46:26,742 INFO L431 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 [2024-10-15 14:46:26,743 INFO L432 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 [2024-10-15 14:46:26,744 INFO L433 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] [2024-10-15 14:46:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-15 14:46:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-10-15 14:46:26,768 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) [2024-10-15 14:46:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-10-15 14:46:26,769 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-10-15 14:46:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:26,770 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-10-15 14:46:26,770 INFO L472 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) [2024-10-15 14:46:26,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-10-15 14:46:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-15 14:46:26,771 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:26,771 INFO L215 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] [2024-10-15 14:46:26,783 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 14:46:26,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:26,972 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:26,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-10-15 14:46:26,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:26,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801066484] [2024-10-15 14:46:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:26,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:26,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541096161] [2024-10-15 14:46:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:26,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:26,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:26,990 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) [2024-10-15 14:46:26,991 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 14:46:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:27,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-15 14:46:27,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-15 14:46:27,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:27,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:27,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801066484] [2024-10-15 14:46:27,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:27,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541096161] [2024-10-15 14:46:27,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541096161] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:27,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:46:27,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-10-15 14:46:27,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923186575] [2024-10-15 14:46:27,178 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:27,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 14:46:27,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 14:46:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:46:27,179 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) [2024-10-15 14:46:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:27,278 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-10-15 14:46:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:46:27,280 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 [2024-10-15 14:46:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:27,281 INFO L225 Difference]: With dead ends: 123 [2024-10-15 14:46:27,281 INFO L226 Difference]: Without dead ends: 120 [2024-10-15 14:46:27,283 INFO L431 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 [2024-10-15 14:46:27,283 INFO L432 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 [2024-10-15 14:46:27,283 INFO L433 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] [2024-10-15 14:46:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-15 14:46:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-10-15 14:46:27,310 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) [2024-10-15 14:46:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-10-15 14:46:27,311 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-10-15 14:46:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:27,312 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-10-15 14:46:27,312 INFO L472 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) [2024-10-15 14:46:27,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-10-15 14:46:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-15 14:46:27,313 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:27,313 INFO L215 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] [2024-10-15 14:46:27,329 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 14:46:27,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:27,517 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:27,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-10-15 14:46:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:27,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034678252] [2024-10-15 14:46:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:27,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151973379] [2024-10-15 14:46:27,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:46:27,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:27,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:27,542 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) [2024-10-15 14:46:27,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 14:46:27,598 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:46:27,599 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:46:27,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-15 14:46:27,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-15 14:46:27,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:27,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034678252] [2024-10-15 14:46:27,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:27,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151973379] [2024-10-15 14:46:27,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151973379] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:27,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:46:27,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-15 14:46:27,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486032462] [2024-10-15 14:46:27,899 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:27,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 14:46:27,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 14:46:27,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:46:27,900 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) [2024-10-15 14:46:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:28,073 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-10-15 14:46:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:46:28,074 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 [2024-10-15 14:46:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:28,075 INFO L225 Difference]: With dead ends: 129 [2024-10-15 14:46:28,075 INFO L226 Difference]: Without dead ends: 127 [2024-10-15 14:46:28,076 INFO L431 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 [2024-10-15 14:46:28,076 INFO L432 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 [2024-10-15 14:46:28,076 INFO L433 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] [2024-10-15 14:46:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-15 14:46:28,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-10-15 14:46:28,108 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) [2024-10-15 14:46:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-10-15 14:46:28,109 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-10-15 14:46:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:28,110 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-10-15 14:46:28,110 INFO L472 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) [2024-10-15 14:46:28,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-10-15 14:46:28,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-10-15 14:46:28,115 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:28,115 INFO L215 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] [2024-10-15 14:46:28,128 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 14:46:28,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:28,316 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:28,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-10-15 14:46:28,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:28,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54789388] [2024-10-15 14:46:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:28,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:28,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85689146] [2024-10-15 14:46:28,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:46:28,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:28,334 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) [2024-10-15 14:46:28,335 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 14:46:28,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:46:28,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:46:28,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-15 14:46:28,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-15 14:46:29,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:41,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:41,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54789388] [2024-10-15 14:46:41,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:41,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85689146] [2024-10-15 14:46:41,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85689146] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:41,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:46:41,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 14:46:41,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361098266] [2024-10-15 14:46:41,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:41,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:46:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:46:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-10-15 14:46:41,587 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) [2024-10-15 14:46:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:41,961 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-10-15 14:46:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:46:41,961 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 [2024-10-15 14:46:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:41,962 INFO L225 Difference]: With dead ends: 133 [2024-10-15 14:46:41,962 INFO L226 Difference]: Without dead ends: 131 [2024-10-15 14:46:41,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=163, Invalid=706, Unknown=1, NotChecked=0, Total=870 [2024-10-15 14:46:41,963 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:46:41,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:46:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-15 14:46:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-10-15 14:46:41,986 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) [2024-10-15 14:46:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-10-15 14:46:41,988 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-10-15 14:46:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:41,988 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-10-15 14:46:41,988 INFO L472 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) [2024-10-15 14:46:41,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-10-15 14:46:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-15 14:46:41,989 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:41,990 INFO L215 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] [2024-10-15 14:46:42,004 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 14:46:42,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 14:46:42,195 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:42,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-10-15 14:46:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:42,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707138169] [2024-10-15 14:46:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:42,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:42,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969269777] [2024-10-15 14:46:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:42,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:42,213 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) [2024-10-15 14:46:42,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 14:46:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:42,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-15 14:46:42,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-10-15 14:46:42,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-10-15 14:46:43,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:43,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707138169] [2024-10-15 14:46:43,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:43,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969269777] [2024-10-15 14:46:43,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969269777] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:46:43,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:46:43,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-15 14:46:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855703714] [2024-10-15 14:46:43,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:43,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:46:43,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:46:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:46:43,258 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) [2024-10-15 14:46:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:45,700 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-10-15 14:46:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:46:45,701 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 [2024-10-15 14:46:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:45,703 INFO L225 Difference]: With dead ends: 229 [2024-10-15 14:46:45,703 INFO L226 Difference]: Without dead ends: 225 [2024-10-15 14:46:45,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:46:45,704 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:46:45,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-15 14:46:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-10-15 14:46:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-10-15 14:46:45,766 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) [2024-10-15 14:46:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-10-15 14:46:45,768 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-10-15 14:46:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:45,768 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-10-15 14:46:45,768 INFO L472 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) [2024-10-15 14:46:45,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-10-15 14:46:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-10-15 14:46:45,769 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:45,769 INFO L215 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] [2024-10-15 14:46:45,782 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 14:46:45,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 14:46:45,970 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:45,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-10-15 14:46:45,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:45,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943905902] [2024-10-15 14:46:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:46:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,045 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:46:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:46:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:46:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:46:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:46:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:46:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-15 14:46:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-15 14:46:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-15 14:46:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,066 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-15 14:46:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-15 14:46:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-15 14:46:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-15 14:46:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-10-15 14:46:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-10-15 14:46:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-10-15 14:46:46,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:46,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943905902] [2024-10-15 14:46:46,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943905902] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:46:46,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:46:46,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:46:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992541277] [2024-10-15 14:46:46,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:46:46,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:46:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:46:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:46:46,084 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) [2024-10-15 14:46:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:46,179 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-10-15 14:46:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:46:46,179 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 [2024-10-15 14:46:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:46,181 INFO L225 Difference]: With dead ends: 275 [2024-10-15 14:46:46,181 INFO L226 Difference]: Without dead ends: 201 [2024-10-15 14:46:46,181 INFO L431 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 [2024-10-15 14:46:46,182 INFO L432 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 [2024-10-15 14:46:46,182 INFO L433 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] [2024-10-15 14:46:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-15 14:46:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-10-15 14:46:46,237 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) [2024-10-15 14:46:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-10-15 14:46:46,239 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-10-15 14:46:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:46,239 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-10-15 14:46:46,239 INFO L472 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) [2024-10-15 14:46:46,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-10-15 14:46:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-10-15 14:46:46,240 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:46,240 INFO L215 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] [2024-10-15 14:46:46,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-15 14:46:46,241 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:46,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:46,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-10-15 14:46:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:46,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572513224] [2024-10-15 14:46:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:46,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:46,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997680331] [2024-10-15 14:46:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:46,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:46,262 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) [2024-10-15 14:46:46,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 14:46:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:46,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-15 14:46:46,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-10-15 14:46:47,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:47,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:47,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572513224] [2024-10-15 14:46:47,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:47,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997680331] [2024-10-15 14:46:47,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997680331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:47,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:46:47,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 14:46:47,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325483363] [2024-10-15 14:46:47,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:47,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:46:47,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:46:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:46:47,305 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) [2024-10-15 14:46:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:47,849 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-10-15 14:46:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:46:47,849 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 [2024-10-15 14:46:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:47,851 INFO L225 Difference]: With dead ends: 201 [2024-10-15 14:46:47,851 INFO L226 Difference]: Without dead ends: 199 [2024-10-15 14:46:47,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:46:47,852 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-10-15 14:46:47,852 INFO L433 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] [2024-10-15 14:46:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-10-15 14:46:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-10-15 14:46:47,912 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) [2024-10-15 14:46:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-10-15 14:46:47,913 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-10-15 14:46:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:47,913 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-10-15 14:46:47,914 INFO L472 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) [2024-10-15 14:46:47,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-10-15 14:46:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-15 14:46:47,915 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:47,915 INFO L215 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] [2024-10-15 14:46:47,927 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 14:46:48,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:48,118 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:48,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:48,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-10-15 14:46:48,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:48,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085752236] [2024-10-15 14:46:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:48,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:46:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:46:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:46:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:46:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:46:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:46:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:46:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-15 14:46:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,224 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-15 14:46:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,225 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-15 14:46:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-15 14:46:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-15 14:46:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-15 14:46:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,235 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-15 14:46:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-10-15 14:46:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-10-15 14:46:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-10-15 14:46:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-10-15 14:46:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-10-15 14:46:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-10-15 14:46:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-15 14:46:48,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:48,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085752236] [2024-10-15 14:46:48,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085752236] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:48,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310266679] [2024-10-15 14:46:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:48,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:48,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:48,255 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) [2024-10-15 14:46:48,256 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 14:46:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:46:48,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:46:48,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-10-15 14:46:48,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-15 14:46:48,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310266679] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:46:48,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:46:48,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-10-15 14:46:48,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102327673] [2024-10-15 14:46:48,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:48,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:46:48,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:48,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:46:48,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:46:48,417 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) [2024-10-15 14:46:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:48,605 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-10-15 14:46:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:46:48,605 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 [2024-10-15 14:46:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:48,606 INFO L225 Difference]: With dead ends: 227 [2024-10-15 14:46:48,607 INFO L226 Difference]: Without dead ends: 215 [2024-10-15 14:46:48,607 INFO L431 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 [2024-10-15 14:46:48,607 INFO L432 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 [2024-10-15 14:46:48,607 INFO L433 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] [2024-10-15 14:46:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-10-15 14:46:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-10-15 14:46:48,660 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) [2024-10-15 14:46:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-10-15 14:46:48,661 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-10-15 14:46:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:48,662 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-10-15 14:46:48,662 INFO L472 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) [2024-10-15 14:46:48,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-10-15 14:46:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-10-15 14:46:48,664 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:48,665 INFO L215 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] [2024-10-15 14:46:48,678 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-15 14:46:48,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 14:46:48,868 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:48,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:48,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-10-15 14:46:48,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:48,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772625656] [2024-10-15 14:46:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:48,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:48,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952968288] [2024-10-15 14:46:48,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:46:48,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:48,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:48,900 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) [2024-10-15 14:46:48,901 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 14:46:48,956 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:46:48,956 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:46:48,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-15 14:46:48,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-15 14:46:49,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:49,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:49,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772625656] [2024-10-15 14:46:49,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:49,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952968288] [2024-10-15 14:46:49,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952968288] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:49,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:46:49,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-15 14:46:49,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052510834] [2024-10-15 14:46:49,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:49,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 14:46:49,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:49,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 14:46:49,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:46:49,285 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) [2024-10-15 14:46:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:49,518 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-10-15 14:46:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:46:49,519 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 [2024-10-15 14:46:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:49,521 INFO L225 Difference]: With dead ends: 230 [2024-10-15 14:46:49,521 INFO L226 Difference]: Without dead ends: 227 [2024-10-15 14:46:49,521 INFO L431 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 [2024-10-15 14:46:49,521 INFO L432 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 [2024-10-15 14:46:49,521 INFO L433 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] [2024-10-15 14:46:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-10-15 14:46:49,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-10-15 14:46:49,591 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) [2024-10-15 14:46:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-10-15 14:46:49,593 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-10-15 14:46:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:49,593 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-10-15 14:46:49,593 INFO L472 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) [2024-10-15 14:46:49,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-10-15 14:46:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-10-15 14:46:49,594 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:49,595 INFO L215 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] [2024-10-15 14:46:49,607 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-15 14:46:49,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 14:46:49,799 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:49,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-10-15 14:46:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:49,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720683241] [2024-10-15 14:46:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:49,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:49,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084537945] [2024-10-15 14:46:49,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:46:49,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:49,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:49,821 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) [2024-10-15 14:46:49,823 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 14:46:49,885 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:46:49,885 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:46:49,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-15 14:46:49,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-10-15 14:46:50,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-10-15 14:46:50,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:50,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720683241] [2024-10-15 14:46:50,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:50,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084537945] [2024-10-15 14:46:50,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084537945] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:46:50,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:46:50,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-10-15 14:46:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896202750] [2024-10-15 14:46:50,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:50,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:46:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:46:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:46:50,649 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) [2024-10-15 14:46:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:51,661 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-10-15 14:46:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:46:51,661 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 [2024-10-15 14:46:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:51,663 INFO L225 Difference]: With dead ends: 253 [2024-10-15 14:46:51,663 INFO L226 Difference]: Without dead ends: 251 [2024-10-15 14:46:51,663 INFO L431 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 [2024-10-15 14:46:51,663 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:46:51,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:46:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-10-15 14:46:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-10-15 14:46:51,757 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) [2024-10-15 14:46:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-10-15 14:46:51,758 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-10-15 14:46:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:51,758 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-10-15 14:46:51,759 INFO L472 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) [2024-10-15 14:46:51,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-10-15 14:46:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-10-15 14:46:51,760 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:51,760 INFO L215 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] [2024-10-15 14:46:51,772 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-15 14:46:51,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 14:46:51,960 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:51,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-10-15 14:46:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:51,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742892532] [2024-10-15 14:46:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:51,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255725260] [2024-10-15 14:46:51,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:46:51,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:51,977 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) [2024-10-15 14:46:51,978 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 14:46:52,038 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:46:52,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:46:52,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-15 14:46:52,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 71 proven. 36 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-10-15 14:46:52,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:53,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:53,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742892532] [2024-10-15 14:46:53,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:53,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255725260] [2024-10-15 14:46:53,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255725260] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:53,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:46:53,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-15 14:46:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057213882] [2024-10-15 14:46:53,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:53,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 14:46:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 14:46:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-10-15 14:46:53,171 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-10-15 14:46:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:54,014 INFO L93 Difference]: Finished difference Result 261 states and 362 transitions. [2024-10-15 14:46:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:46:54,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 128 [2024-10-15 14:46:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:54,016 INFO L225 Difference]: With dead ends: 261 [2024-10-15 14:46:54,016 INFO L226 Difference]: Without dead ends: 259 [2024-10-15 14:46:54,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:46:54,016 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:46:54,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 528 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:46:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-10-15 14:46:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-10-15 14:46:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 126 states have internal predecessors, (142), 94 states have call successors, (94), 18 states have call predecessors, (94), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2024-10-15 14:46:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 327 transitions. [2024-10-15 14:46:54,127 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 327 transitions. Word has length 128 [2024-10-15 14:46:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:54,128 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 327 transitions. [2024-10-15 14:46:54,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-10-15 14:46:54,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 327 transitions. [2024-10-15 14:46:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-10-15 14:46:54,129 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:54,129 INFO L215 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] [2024-10-15 14:46:54,144 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-15 14:46:54,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-15 14:46:54,330 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:54,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-10-15 14:46:54,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:54,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236691546] [2024-10-15 14:46:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:54,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964906841] [2024-10-15 14:46:54,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:46:54,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:54,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:54,361 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) [2024-10-15 14:46:54,362 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 14:46:54,463 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-15 14:46:54,463 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:46:54,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-15 14:46:54,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 99 proven. 79 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-10-15 14:46:55,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:46:56,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:46:56,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236691546] [2024-10-15 14:46:56,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:46:56,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964906841] [2024-10-15 14:46:56,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964906841] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:46:56,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:46:56,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-15 14:46:56,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974870726] [2024-10-15 14:46:56,448 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:46:56,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:46:56,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:46:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:46:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:46:56,449 INFO L87 Difference]: Start difference. First operand 235 states and 327 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2024-10-15 14:46:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:46:58,322 INFO L93 Difference]: Finished difference Result 269 states and 372 transitions. [2024-10-15 14:46:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:46:58,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) Word has length 131 [2024-10-15 14:46:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:46:58,324 INFO L225 Difference]: With dead ends: 269 [2024-10-15 14:46:58,324 INFO L226 Difference]: Without dead ends: 267 [2024-10-15 14:46:58,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:46:58,324 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 23 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:46:58,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 637 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-15 14:46:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-10-15 14:46:58,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2024-10-15 14:46:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 141 states have internal predecessors, (159), 106 states have call successors, (106), 21 states have call predecessors, (106), 20 states have return successors, (103), 102 states have call predecessors, (103), 103 states have call successors, (103) [2024-10-15 14:46:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 368 transitions. [2024-10-15 14:46:58,453 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 368 transitions. Word has length 131 [2024-10-15 14:46:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:46:58,453 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 368 transitions. [2024-10-15 14:46:58,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2024-10-15 14:46:58,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 368 transitions. [2024-10-15 14:46:58,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-10-15 14:46:58,455 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:46:58,455 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:46:58,461 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-15 14:46:58,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:58,656 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:46:58,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:46:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-10-15 14:46:58,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:46:58,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569113232] [2024-10-15 14:46:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:46:58,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:46:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:46:58,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104620608] [2024-10-15 14:46:58,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:46:58,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:46:58,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:46:58,678 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:46:58,683 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-15 14:46:58,756 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:46:58,757 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:46:58,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 14:46:58,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:46:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-15 14:46:59,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:47:01,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:47:01,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569113232] [2024-10-15 14:47:01,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:47:01,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104620608] [2024-10-15 14:47:01,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104620608] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:47:01,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:47:01,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-15 14:47:01,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018108534] [2024-10-15 14:47:01,726 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:47:01,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:47:01,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:47:01,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:47:01,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:47:01,728 INFO L87 Difference]: Start difference. First operand 265 states and 368 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-10-15 14:47:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:47:02,723 INFO L93 Difference]: Finished difference Result 309 states and 429 transitions. [2024-10-15 14:47:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:47:02,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 137 [2024-10-15 14:47:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:47:02,725 INFO L225 Difference]: With dead ends: 309 [2024-10-15 14:47:02,725 INFO L226 Difference]: Without dead ends: 302 [2024-10-15 14:47:02,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:47:02,726 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 29 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:47:02,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 644 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:47:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-10-15 14:47:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 282. [2024-10-15 14:47:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 152 states have internal predecessors, (171), 110 states have call successors, (110), 23 states have call predecessors, (110), 22 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2024-10-15 14:47:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 388 transitions. [2024-10-15 14:47:02,867 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 388 transitions. Word has length 137 [2024-10-15 14:47:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:47:02,867 INFO L471 AbstractCegarLoop]: Abstraction has 282 states and 388 transitions. [2024-10-15 14:47:02,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-10-15 14:47:02,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:47:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 388 transitions. [2024-10-15 14:47:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-10-15 14:47:02,869 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:47:02,869 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:47:02,883 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-15 14:47:03,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:47:03,070 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:47:03,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:47:03,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1268175597, now seen corresponding path program 6 times [2024-10-15 14:47:03,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:47:03,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304950862] [2024-10-15 14:47:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:47:03,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:47:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:47:03,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346907615] [2024-10-15 14:47:03,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:47:03,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:47:03,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:47:03,097 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:47:03,098 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-15 14:47:03,197 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-15 14:47:03,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:47:03,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-15 14:47:03,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:47:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 162 proven. 42 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2024-10-15 14:47:04,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:47:35,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:47:35,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304950862] [2024-10-15 14:47:35,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:47:35,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346907615] [2024-10-15 14:47:35,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346907615] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:47:35,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:47:35,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 14:47:35,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138659184] [2024-10-15 14:47:35,454 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:47:35,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:47:35,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:47:35,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:47:35,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:47:35,455 INFO L87 Difference]: Start difference. First operand 282 states and 388 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-15 14:47:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:47:35,967 INFO L93 Difference]: Finished difference Result 294 states and 398 transitions. [2024-10-15 14:47:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:47:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 150 [2024-10-15 14:47:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:47:35,969 INFO L225 Difference]: With dead ends: 294 [2024-10-15 14:47:35,969 INFO L226 Difference]: Without dead ends: 292 [2024-10-15 14:47:35,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:47:35,970 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 20 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:47:35,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 375 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:47:35,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-10-15 14:47:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 261. [2024-10-15 14:47:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 140 states have (on average 1.1428571428571428) internal successors, (160), 143 states have internal predecessors, (160), 98 states have call successors, (98), 23 states have call predecessors, (98), 22 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2024-10-15 14:47:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 353 transitions. [2024-10-15 14:47:36,096 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 353 transitions. Word has length 150 [2024-10-15 14:47:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:47:36,097 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 353 transitions. [2024-10-15 14:47:36,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-15 14:47:36,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:47:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 353 transitions. [2024-10-15 14:47:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-10-15 14:47:36,098 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:47:36,098 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:47:36,105 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-15 14:47:36,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:47:36,303 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:47:36,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:47:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash 680663563, now seen corresponding path program 7 times [2024-10-15 14:47:36,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:47:36,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303419341] [2024-10-15 14:47:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:47:36,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:47:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:47:36,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231590775] [2024-10-15 14:47:36,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:47:36,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:47:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:47:36,325 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:47:36,326 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-15 14:47:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:47:36,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-15 14:47:36,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:47:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 173 proven. 87 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2024-10-15 14:47:37,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:47:37,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:47:37,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303419341] [2024-10-15 14:47:37,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:47:37,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231590775] [2024-10-15 14:47:37,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231590775] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:47:37,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:47:37,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-15 14:47:37,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647992432] [2024-10-15 14:47:37,833 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:47:37,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:47:37,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:47:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:47:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:47:37,834 INFO L87 Difference]: Start difference. First operand 261 states and 353 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-10-15 14:47:39,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:47:39,203 INFO L93 Difference]: Finished difference Result 299 states and 401 transitions. [2024-10-15 14:47:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:47:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) Word has length 153 [2024-10-15 14:47:39,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:47:39,205 INFO L225 Difference]: With dead ends: 299 [2024-10-15 14:47:39,205 INFO L226 Difference]: Without dead ends: 297 [2024-10-15 14:47:39,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:47:39,206 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 14:47:39,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 582 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 14:47:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-15 14:47:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 266. [2024-10-15 14:47:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 146 states have internal predecessors, (163), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2024-10-15 14:47:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 356 transitions. [2024-10-15 14:47:39,337 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 356 transitions. Word has length 153 [2024-10-15 14:47:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:47:39,338 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 356 transitions. [2024-10-15 14:47:39,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-10-15 14:47:39,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:47:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 356 transitions. [2024-10-15 14:47:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-10-15 14:47:39,340 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:47:39,340 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:47:39,353 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-15 14:47:39,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-15 14:47:39,541 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:47:39,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:47:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash 818386669, now seen corresponding path program 8 times [2024-10-15 14:47:39,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:47:39,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452396243] [2024-10-15 14:47:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:47:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:47:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:47:39,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974299441] [2024-10-15 14:47:39,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:47:39,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:47:39,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:47:39,563 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:47:39,564 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-15 14:47:39,643 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:47:39,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:47:39,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-15 14:47:39,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:47:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 167 proven. 78 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2024-10-15 14:47:42,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:47:47,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:47:47,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452396243] [2024-10-15 14:47:47,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:47:47,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974299441] [2024-10-15 14:47:47,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974299441] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:47:47,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:47:47,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 14:47:47,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518158397] [2024-10-15 14:47:47,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:47:47,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:47:47,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:47:47,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:47:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=323, Unknown=1, NotChecked=0, Total=380 [2024-10-15 14:47:47,287 INFO L87 Difference]: Start difference. First operand 266 states and 356 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-15 14:47:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:47:53,470 INFO L93 Difference]: Finished difference Result 318 states and 430 transitions. [2024-10-15 14:47:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:47:53,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 153 [2024-10-15 14:47:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:47:53,473 INFO L225 Difference]: With dead ends: 318 [2024-10-15 14:47:53,473 INFO L226 Difference]: Without dead ends: 316 [2024-10-15 14:47:53,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=109, Invalid=646, Unknown=1, NotChecked=0, Total=756 [2024-10-15 14:47:53,474 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:47:53,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 719 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-10-15 14:47:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-10-15 14:47:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 307. [2024-10-15 14:47:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 166 states have internal predecessors, (187), 115 states have call successors, (115), 28 states have call predecessors, (115), 27 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2024-10-15 14:47:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 414 transitions. [2024-10-15 14:47:53,648 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 414 transitions. Word has length 153 [2024-10-15 14:47:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:47:53,648 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 414 transitions. [2024-10-15 14:47:53,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2024-10-15 14:47:53,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:47:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 414 transitions. [2024-10-15 14:47:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-10-15 14:47:53,650 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:47:53,650 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:47:53,663 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-15 14:47:53,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 14:47:53,850 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:47:53,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:47:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-10-15 14:47:53,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:47:53,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891635933] [2024-10-15 14:47:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:47:53,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:47:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:47:53,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967745512] [2024-10-15 14:47:53,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:47:53,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:47:53,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:47:53,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:47:53,876 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-15 14:47:53,942 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:47:53,942 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:47:53,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:47:53,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:47:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-10-15 14:47:54,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:47:59,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:47:59,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891635933] [2024-10-15 14:47:59,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:47:59,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967745512] [2024-10-15 14:47:59,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967745512] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:47:59,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:47:59,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-15 14:47:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029503682] [2024-10-15 14:47:59,430 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:47:59,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:47:59,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:47:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:47:59,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-10-15 14:47:59,431 INFO L87 Difference]: Start difference. First operand 307 states and 414 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-15 14:47:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:47:59,839 INFO L93 Difference]: Finished difference Result 324 states and 428 transitions. [2024-10-15 14:47:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:47:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 156 [2024-10-15 14:47:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:47:59,841 INFO L225 Difference]: With dead ends: 324 [2024-10-15 14:47:59,841 INFO L226 Difference]: Without dead ends: 317 [2024-10-15 14:47:59,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-10-15 14:47:59,842 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:47:59,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 260 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:47:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2024-10-15 14:48:00,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 300. [2024-10-15 14:48:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 163 states have (on average 1.1226993865030674) internal successors, (183), 165 states have internal predecessors, (183), 107 states have call successors, (107), 30 states have call predecessors, (107), 29 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2024-10-15 14:48:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 394 transitions. [2024-10-15 14:48:00,003 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 394 transitions. Word has length 156 [2024-10-15 14:48:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:00,003 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 394 transitions. [2024-10-15 14:48:00,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-15 14:48:00,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 394 transitions. [2024-10-15 14:48:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-10-15 14:48:00,005 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:00,005 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-10-15 14:48:00,018 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-15 14:48:00,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:00,206 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:00,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:00,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1326373992, now seen corresponding path program 4 times [2024-10-15 14:48:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:00,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184268702] [2024-10-15 14:48:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:00,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513397850] [2024-10-15 14:48:00,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:48:00,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:00,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:00,222 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:00,223 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-15 14:48:00,290 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:48:00,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:00,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-15 14:48:00,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 99 proven. 80 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-10-15 14:48:01,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:06,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:06,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184268702] [2024-10-15 14:48:06,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:06,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513397850] [2024-10-15 14:48:06,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513397850] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:06,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:06,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-15 14:48:06,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544761205] [2024-10-15 14:48:06,768 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:06,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:48:06,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:48:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:48:06,769 INFO L87 Difference]: Start difference. First operand 300 states and 394 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-10-15 14:48:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:11,035 INFO L93 Difference]: Finished difference Result 337 states and 450 transitions. [2024-10-15 14:48:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:48:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 159 [2024-10-15 14:48:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:11,038 INFO L225 Difference]: With dead ends: 337 [2024-10-15 14:48:11,038 INFO L226 Difference]: Without dead ends: 330 [2024-10-15 14:48:11,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:48:11,038 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 46 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:11,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 482 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-10-15 14:48:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-10-15 14:48:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 309. [2024-10-15 14:48:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 168 states have (on average 1.125) internal successors, (189), 170 states have internal predecessors, (189), 111 states have call successors, (111), 30 states have call predecessors, (111), 29 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-10-15 14:48:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 408 transitions. [2024-10-15 14:48:11,207 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 408 transitions. Word has length 159 [2024-10-15 14:48:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:11,208 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 408 transitions. [2024-10-15 14:48:11,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-10-15 14:48:11,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 408 transitions. [2024-10-15 14:48:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-10-15 14:48:11,209 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:11,209 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-10-15 14:48:11,222 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-15 14:48:11,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-15 14:48:11,410 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:11,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:11,410 INFO L85 PathProgramCache]: Analyzing trace with hash 895086330, now seen corresponding path program 5 times [2024-10-15 14:48:11,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:11,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324533743] [2024-10-15 14:48:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:11,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:11,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913499703] [2024-10-15 14:48:11,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:48:11,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:11,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:11,435 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:11,440 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-15 14:48:11,530 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-15 14:48:11,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:11,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 14:48:11,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2024-10-15 14:48:14,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:20,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:20,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324533743] [2024-10-15 14:48:20,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:20,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913499703] [2024-10-15 14:48:20,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913499703] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:20,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:20,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 14:48:20,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54771633] [2024-10-15 14:48:20,865 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:20,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:48:20,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:48:20,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:48:20,866 INFO L87 Difference]: Start difference. First operand 309 states and 408 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-10-15 14:48:25,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:48:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:26,377 INFO L93 Difference]: Finished difference Result 365 states and 486 transitions. [2024-10-15 14:48:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:48:26,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 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 159 [2024-10-15 14:48:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:26,380 INFO L225 Difference]: With dead ends: 365 [2024-10-15 14:48:26,380 INFO L226 Difference]: Without dead ends: 363 [2024-10-15 14:48:26,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:48:26,381 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 34 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:26,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 724 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-10-15 14:48:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-10-15 14:48:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2024-10-15 14:48:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 187 states have (on average 1.1283422459893049) internal successors, (211), 190 states have internal predecessors, (211), 120 states have call successors, (120), 34 states have call predecessors, (120), 33 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2024-10-15 14:48:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 448 transitions. [2024-10-15 14:48:26,576 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 448 transitions. Word has length 159 [2024-10-15 14:48:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:26,577 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 448 transitions. [2024-10-15 14:48:26,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-10-15 14:48:26,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 448 transitions. [2024-10-15 14:48:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-10-15 14:48:26,578 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:26,578 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-10-15 14:48:26,591 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:26,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-15 14:48:26,779 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:26,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:26,779 INFO L85 PathProgramCache]: Analyzing trace with hash 487350504, now seen corresponding path program 2 times [2024-10-15 14:48:26,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:26,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29263897] [2024-10-15 14:48:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:26,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:26,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405468188] [2024-10-15 14:48:26,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:26,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:26,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:26,796 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:26,797 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-15 14:48:26,869 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:26,870 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:26,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-15 14:48:26,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 104 proven. 80 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2024-10-15 14:48:27,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-10-15 14:48:27,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:27,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29263897] [2024-10-15 14:48:27,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:27,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405468188] [2024-10-15 14:48:27,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405468188] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:27,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:27,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-10-15 14:48:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054800142] [2024-10-15 14:48:27,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:27,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:48:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:27,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:48:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:48:27,661 INFO L87 Difference]: Start difference. First operand 341 states and 448 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-10-15 14:48:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:30,222 INFO L93 Difference]: Finished difference Result 386 states and 506 transitions. [2024-10-15 14:48:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:48:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) Word has length 164 [2024-10-15 14:48:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:30,225 INFO L225 Difference]: With dead ends: 386 [2024-10-15 14:48:30,225 INFO L226 Difference]: Without dead ends: 373 [2024-10-15 14:48:30,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:48:30,225 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 66 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:30,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 576 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-15 14:48:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-10-15 14:48:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 352. [2024-10-15 14:48:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 197 states have (on average 1.1218274111675126) internal successors, (221), 199 states have internal predecessors, (221), 119 states have call successors, (119), 36 states have call predecessors, (119), 35 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2024-10-15 14:48:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2024-10-15 14:48:30,438 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 457 transitions. Word has length 164 [2024-10-15 14:48:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:30,438 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 457 transitions. [2024-10-15 14:48:30,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-10-15 14:48:30,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 457 transitions. [2024-10-15 14:48:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-10-15 14:48:30,440 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:30,440 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:30,454 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-15 14:48:30,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-15 14:48:30,645 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:30,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:30,645 INFO L85 PathProgramCache]: Analyzing trace with hash -700524310, now seen corresponding path program 9 times [2024-10-15 14:48:30,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:30,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873345972] [2024-10-15 14:48:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:30,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:30,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928295124] [2024-10-15 14:48:30,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:48:30,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:30,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:30,679 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:30,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-15 14:48:30,762 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:48:30,762 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:30,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-15 14:48:30,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 185 proven. 61 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2024-10-15 14:48:31,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:31,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:31,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873345972] [2024-10-15 14:48:31,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:31,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928295124] [2024-10-15 14:48:31,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928295124] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:31,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:31,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 14:48:31,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991461865] [2024-10-15 14:48:31,954 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:31,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:48:31,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:31,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:48:31,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:48:31,955 INFO L87 Difference]: Start difference. First operand 352 states and 457 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-10-15 14:48:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:32,771 INFO L93 Difference]: Finished difference Result 368 states and 470 transitions. [2024-10-15 14:48:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:48:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 175 [2024-10-15 14:48:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:32,773 INFO L225 Difference]: With dead ends: 368 [2024-10-15 14:48:32,773 INFO L226 Difference]: Without dead ends: 366 [2024-10-15 14:48:32,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:48:32,774 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 17 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:32,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 637 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:48:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-10-15 14:48:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2024-10-15 14:48:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 191 states have (on average 1.1151832460732984) internal successors, (213), 193 states have internal predecessors, (213), 107 states have call successors, (107), 37 states have call predecessors, (107), 36 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2024-10-15 14:48:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 425 transitions. [2024-10-15 14:48:32,968 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 425 transitions. Word has length 175 [2024-10-15 14:48:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:32,968 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 425 transitions. [2024-10-15 14:48:32,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-10-15 14:48:32,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 425 transitions. [2024-10-15 14:48:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-10-15 14:48:32,970 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:32,970 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:32,982 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:33,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-15 14:48:33,170 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:33,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash 515416140, now seen corresponding path program 10 times [2024-10-15 14:48:33,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:33,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135890592] [2024-10-15 14:48:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:33,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:33,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84893245] [2024-10-15 14:48:33,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:48:33,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:33,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:33,192 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:48:33,193 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-15 14:48:33,279 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:48:33,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:33,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-15 14:48:33,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 228 proven. 153 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2024-10-15 14:48:44,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:45,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:45,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135890592] [2024-10-15 14:48:45,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:45,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84893245] [2024-10-15 14:48:45,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84893245] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:45,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:45,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-15 14:48:45,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170343050] [2024-10-15 14:48:45,261 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:45,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:48:45,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:45,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:48:45,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=616, Unknown=1, NotChecked=0, Total=702 [2024-10-15 14:48:45,262 INFO L87 Difference]: Start difference. First operand 335 states and 425 transitions. Second operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2024-10-15 14:49:08,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-10-15 14:49:12,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-10-15 14:49:16,447 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 [0] [2024-10-15 14:49:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:16,483 INFO L93 Difference]: Finished difference Result 346 states and 439 transitions. [2024-10-15 14:49:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 14:49:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) Word has length 175 [2024-10-15 14:49:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:16,495 INFO L225 Difference]: With dead ends: 346 [2024-10-15 14:49:16,495 INFO L226 Difference]: Without dead ends: 344 [2024-10-15 14:49:16,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=178, Invalid=1302, Unknown=2, NotChecked=0, Total=1482 [2024-10-15 14:49:16,496 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 37 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:16,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 702 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1100 Invalid, 3 Unknown, 0 Unchecked, 18.0s Time] [2024-10-15 14:49:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-10-15 14:49:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2024-10-15 14:49:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 195 states have (on average 1.1128205128205129) internal successors, (217), 198 states have internal predecessors, (217), 111 states have call successors, (111), 38 states have call predecessors, (111), 37 states have return successors, (109), 107 states have call predecessors, (109), 109 states have call successors, (109) [2024-10-15 14:49:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 437 transitions. [2024-10-15 14:49:16,709 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 437 transitions. Word has length 175 [2024-10-15 14:49:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:16,709 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 437 transitions. [2024-10-15 14:49:16,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2024-10-15 14:49:16,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 437 transitions. [2024-10-15 14:49:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-10-15 14:49:16,711 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:16,711 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:16,726 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-15 14:49:16,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:16,915 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:16,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:16,916 INFO L85 PathProgramCache]: Analyzing trace with hash 653139246, now seen corresponding path program 11 times [2024-10-15 14:49:16,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:16,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406486927] [2024-10-15 14:49:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:16,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135859172] [2024-10-15 14:49:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:49:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:16,942 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:49:16,945 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-15 14:49:17,096 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-15 14:49:17,097 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:17,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-10-15 14:49:17,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 199 proven. 134 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2024-10-15 14:49:18,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:25,851 WARN L286 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-15 14:50:03,891 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~q~0 c_main_~xy~0 c_main_~k~0)) (.cse1 (* c_main_~yy~0 c_main_~s~0 c_main_~k~0)) (.cse2 (* c_main_~p~0 c_main_~x~0 c_main_~y~0)) (.cse3 (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (.cse4 (* c_main_~q~0 c_main_~x~0 c_main_~y~0 c_main_~k~0)) (.cse5 (* c_main_~yy~0 c_main_~r~0)) (.cse6 (* c_main_~q~0 c_main_~x~0 c_main_~y~0)) (.cse7 (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0)) (.cse8 (* c_main_~xy~0 c_main_~p~0)) (.cse9 (* c_main_~s~0 c_main_~y~0 c_main_~y~0)) (.cse13 (* c_main_~p~0 c_main_~x~0)) (.cse12 (* c_main_~r~0 c_main_~y~0)) (.cse10 (* c_main_~q~0 c_main_~x~0)) (.cse14 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse11 (* c_main_~s~0 c_main_~y~0)) (.cse15 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (< c_main_~b~0 (+ c_main_~c~0 1)) (= (+ (* c_main_~q~0 c_main_~xy~0) .cse0 .cse1 (* c_main_~yy~0 c_main_~s~0) .cse2 .cse3) (+ .cse4 .cse5 .cse6 .cse7 .cse8 .cse9)) (not (= c_main_~b~0 (+ .cse10 .cse11))) (< (+ c_main_~b~0 (* 2 .cse12) (* 2 .cse13)) (+ (* .cse10 2) (* 2 .cse11) (* 2 .cse14) (* 2 .cse15) 1)) (not (= (+ .cse0 .cse1 .cse10 .cse11 (* c_main_~b~0 c_main_~y~0) .cse2 .cse3) (+ .cse4 c_main_~b~0 .cse5 .cse6 .cse7 .cse8 .cse9))) (not (= (+ c_main_~b~0 .cse13 .cse12) (+ .cse10 .cse14 c_main_~c~0 .cse11 .cse15))))) is different from true [2024-10-15 14:50:25,282 WARN L286 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-15 14:50:44,662 WARN L286 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-15 14:50:59,049 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)