./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 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_valuebound100.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:34:44,880 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:34:44,957 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:34:44,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:34:44,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:34:45,003 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:34:45,004 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:34:45,004 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:34:45,005 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:34:45,006 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:34:45,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:34:45,007 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:34:45,007 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:34:45,009 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:34:45,010 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:34:45,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:34:45,011 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:34:45,011 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:34:45,011 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:34:45,012 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:34:45,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:34:45,015 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:34:45,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:34:45,016 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:34:45,016 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:34:45,016 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:34:45,016 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:34:45,017 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:34:45,017 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:34:45,017 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:34:45,017 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:34:45,018 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:34:45,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:34:45,018 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:34:45,018 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:34:45,018 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:34:45,019 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:34:45,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:34:45,019 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:34:45,020 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:34:45,020 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:34:45,021 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:34:45,021 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:34:45,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:34:45,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:34:45,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:34:45,315 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:34:45,315 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:34:45,317 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-09-24 23:34:46,773 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:34:46,946 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:34:46,947 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-09-24 23:34:46,954 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/fb6eac771/8bf43d0af69c4e9687c602f9eafc7784/FLAG750497439 [2024-09-24 23:34:47,346 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/fb6eac771/8bf43d0af69c4e9687c602f9eafc7784 [2024-09-24 23:34:47,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:34:47,349 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:34:47,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:34:47,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:34:47,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:34:47,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221a37b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47, skipping insertion in model container [2024-09-24 23:34:47,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,384 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:34:47,536 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2024-09-24 23:34:47,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:34:47,568 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:34:47,579 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2024-09-24 23:34:47,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:34:47,606 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:34:47,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47 WrapperNode [2024-09-24 23:34:47,607 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:34:47,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:34:47,609 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:34:47,609 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:34:47,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,627 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,639 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:34:47,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:34:47,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:34:47,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:34:47,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:34:47,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,656 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,670 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-24 23:34:47,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,680 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,682 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:34:47,683 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:34:47,683 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:34:47,684 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:34:47,684 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (1/1) ... [2024-09-24 23:34:47,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:34:47,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:47,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-24 23:34:47,715 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-24 23:34:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:34:47,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-24 23:34:47,756 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-24 23:34:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:34:47,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:34:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:34:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:34:47,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:34:47,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:34:47,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:34:47,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:34:47,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:34:47,815 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:34:47,817 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:34:47,976 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-24 23:34:47,976 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:34:48,001 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:34:48,002 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:34:48,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:34:48 BoogieIcfgContainer [2024-09-24 23:34:48,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:34:48,004 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:34:48,005 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:34:48,008 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:34:48,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:34:47" (1/3) ... [2024-09-24 23:34:48,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b3d2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:34:48, skipping insertion in model container [2024-09-24 23:34:48,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:34:47" (2/3) ... [2024-09-24 23:34:48,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b3d2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:34:48, skipping insertion in model container [2024-09-24 23:34:48,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:34:48" (3/3) ... [2024-09-24 23:34:48,011 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2024-09-24 23:34:48,027 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:34:48,027 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:34:48,075 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:34:48,081 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d15914d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:34:48,081 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:34:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-24 23:34:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-24 23:34:48,092 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:48,093 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:48,093 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:48,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-24 23:34:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:48,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870713324] [2024-09-24 23:34:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:48,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:34:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:34:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:34:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:34:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:34:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-24 23:34:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:34:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-24 23:34:48,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:48,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870713324] [2024-09-24 23:34:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870713324] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:34:48,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:34:48,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:34:48,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823447580] [2024-09-24 23:34:48,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:34:48,328 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:34:48,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:48,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:34:48,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:34:48,351 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-24 23:34:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:48,378 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-24 23:34:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:34:48,380 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-24 23:34:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:48,388 INFO L225 Difference]: With dead ends: 70 [2024-09-24 23:34:48,389 INFO L226 Difference]: Without dead ends: 34 [2024-09-24 23:34:48,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:34:48,398 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:48,399 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:34:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-24 23:34:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-24 23:34:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-24 23:34:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-24 23:34:48,494 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-24 23:34:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:48,495 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-24 23:34:48,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-24 23:34:48,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-24 23:34:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-24 23:34:48,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:48,498 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:48,498 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:34:48,498 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:48,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-24 23:34:48,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:48,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236042892] [2024-09-24 23:34:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:48,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:34:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:34:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:34:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:34:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:34:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-24 23:34:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:34:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:34:48,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236042892] [2024-09-24 23:34:48,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236042892] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:34:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002144874] [2024-09-24 23:34:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:48,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:48,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:48,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:48,912 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:34:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:48,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-24 23:34:48,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:34:49,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:34:49,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002144874] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:34:49,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:34:49,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-24 23:34:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643546478] [2024-09-24 23:34:49,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:34:49,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:34:49,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:34:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:34:49,375 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-24 23:34:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:49,597 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-24 23:34:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:34:49,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-24 23:34:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:49,599 INFO L225 Difference]: With dead ends: 55 [2024-09-24 23:34:49,599 INFO L226 Difference]: Without dead ends: 47 [2024-09-24 23:34:49,600 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-24 23:34:49,601 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:49,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:34:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-24 23:34:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-24 23:34:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-24 23:34:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-24 23:34:49,627 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-24 23:34:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:49,627 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-24 23:34:49,627 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-24 23:34:49,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-24 23:34:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-24 23:34:49,630 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:49,631 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:49,649 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-24 23:34:49,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:49,835 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:49,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:49,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-24 23:34:49,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:49,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34569424] [2024-09-24 23:34:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:49,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:34:49,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059504775] [2024-09-24 23:34:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:49,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:49,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:49,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:49,871 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:34:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:49,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:34:49,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-24 23:34:49,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:34:49,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:49,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34569424] [2024-09-24 23:34:49,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:34:49,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059504775] [2024-09-24 23:34:49,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059504775] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:34:49,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:34:49,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:34:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366065443] [2024-09-24 23:34:49,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:34:49,973 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:34:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:34:49,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:34:49,974 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-24 23:34:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:50,039 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-24 23:34:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:34:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-24 23:34:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:50,041 INFO L225 Difference]: With dead ends: 65 [2024-09-24 23:34:50,042 INFO L226 Difference]: Without dead ends: 63 [2024-09-24 23:34:50,043 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:34:50,044 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:50,046 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:34:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-24 23:34:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-24 23:34:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-24 23:34:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-24 23:34:50,064 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-24 23:34:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:50,065 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-24 23:34:50,065 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-24 23:34:50,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-24 23:34:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-24 23:34:50,067 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:50,067 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:50,083 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:34:50,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:50,272 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:50,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-24 23:34:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723394646] [2024-09-24 23:34:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:50,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:34:50,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618020266] [2024-09-24 23:34:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:50,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:50,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:50,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:50,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:34:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:50,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:34:50,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-24 23:34:50,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:34:50,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:50,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723394646] [2024-09-24 23:34:50,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:34:50,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618020266] [2024-09-24 23:34:50,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618020266] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:34:50,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:34:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:34:50,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373623099] [2024-09-24 23:34:50,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:34:50,455 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:34:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:34:50,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:34:50,456 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-24 23:34:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:50,505 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-24 23:34:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:34:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-24 23:34:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:50,508 INFO L225 Difference]: With dead ends: 61 [2024-09-24 23:34:50,508 INFO L226 Difference]: Without dead ends: 59 [2024-09-24 23:34:50,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:34:50,509 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:50,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:34:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-24 23:34:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-24 23:34:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-24 23:34:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-24 23:34:50,522 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-24 23:34:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:50,523 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-24 23:34:50,523 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-24 23:34:50,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-24 23:34:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-24 23:34:50,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:50,525 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:50,541 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-24 23:34:50,729 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:50,730 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:50,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:50,731 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-24 23:34:50,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:50,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498155243] [2024-09-24 23:34:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:50,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:34:50,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139475410] [2024-09-24 23:34:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:50,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:50,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:50,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:50,769 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:34:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:50,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:34:50,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-24 23:34:50,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:34:50,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:50,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498155243] [2024-09-24 23:34:50,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:34:50,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139475410] [2024-09-24 23:34:50,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139475410] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:34:50,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:34:50,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:34:50,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382671575] [2024-09-24 23:34:50,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:34:50,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:34:50,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:50,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:34:50,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:34:50,962 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-24 23:34:51,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:51,035 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-24 23:34:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:34:51,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-24 23:34:51,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:51,037 INFO L225 Difference]: With dead ends: 65 [2024-09-24 23:34:51,037 INFO L226 Difference]: Without dead ends: 63 [2024-09-24 23:34:51,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:34:51,038 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:51,038 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:34:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-24 23:34:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-24 23:34:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-24 23:34:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-24 23:34:51,060 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-24 23:34:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:51,060 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-24 23:34:51,060 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-24 23:34:51,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-24 23:34:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-24 23:34:51,065 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:51,065 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:51,082 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 23:34:51,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:51,270 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:51,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-24 23:34:51,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:51,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179260575] [2024-09-24 23:34:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:51,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:34:51,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447767983] [2024-09-24 23:34:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:51,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:51,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:51,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:51,318 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:34:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:51,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:34:51,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-24 23:34:51,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:34:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-24 23:34:51,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:51,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179260575] [2024-09-24 23:34:51,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:34:51,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447767983] [2024-09-24 23:34:51,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447767983] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:34:51,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:34:51,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-24 23:34:51,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660351218] [2024-09-24 23:34:51,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:34:51,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:34:51,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:34:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:34:51,548 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-24 23:34:51,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:51,686 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-24 23:34:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:34:51,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-24 23:34:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:51,688 INFO L225 Difference]: With dead ends: 90 [2024-09-24 23:34:51,688 INFO L226 Difference]: Without dead ends: 88 [2024-09-24 23:34:51,688 INFO L433 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 [2024-09-24 23:34:51,689 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:51,689 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:34:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-24 23:34:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-24 23:34:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-24 23:34:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-24 23:34:51,705 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-24 23:34:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:51,705 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-24 23:34:51,705 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-24 23:34:51,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-24 23:34:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-24 23:34:51,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:51,707 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:51,723 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 23:34:51,911 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 23:34:51,912 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:51,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-24 23:34:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:51,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845740278] [2024-09-24 23:34:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:34:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:34:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:34:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:34:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:34:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-24 23:34:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:34:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:34:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:34:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:34:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-24 23:34:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-24 23:34:52,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:52,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845740278] [2024-09-24 23:34:52,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845740278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:34:52,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287895941] [2024-09-24 23:34:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:52,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:52,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:52,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:52,150 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:34:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:34:52,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-24 23:34:52,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:34:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-24 23:34:52,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287895941] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:34:52,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:34:52,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-24 23:34:52,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818422853] [2024-09-24 23:34:52,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:34:52,348 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 23:34:52,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:52,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 23:34:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:34:52,350 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-24 23:34:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:52,537 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-24 23:34:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:34:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-24 23:34:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:52,541 INFO L225 Difference]: With dead ends: 105 [2024-09-24 23:34:52,541 INFO L226 Difference]: Without dead ends: 97 [2024-09-24 23:34:52,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:34:52,544 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:52,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:34:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-24 23:34:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-24 23:34:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-24 23:34:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-24 23:34:52,601 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-24 23:34:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:52,603 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-24 23:34:52,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-24 23:34:52,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-24 23:34:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-24 23:34:52,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:52,605 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:52,622 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:34:52,805 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:52,806 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:52,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-24 23:34:52,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:52,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266402131] [2024-09-24 23:34:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:52,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:34:52,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318380983] [2024-09-24 23:34:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:52,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:52,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:52,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:52,833 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:34:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:34:52,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-24 23:34:52,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-24 23:34:53,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:34:53,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266402131] [2024-09-24 23:34:53,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:34:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318380983] [2024-09-24 23:34:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318380983] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:34:53,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:34:53,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-24 23:34:53,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866432718] [2024-09-24 23:34:53,068 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:34:53,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:34:53,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:34:53,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:34:53,069 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-24 23:34:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:53,184 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-24 23:34:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:34:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-24 23:34:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:53,189 INFO L225 Difference]: With dead ends: 123 [2024-09-24 23:34:53,189 INFO L226 Difference]: Without dead ends: 120 [2024-09-24 23:34:53,189 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:34:53,190 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:53,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:34:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-24 23:34:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-24 23:34:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-24 23:34:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-24 23:34:53,239 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-24 23:34:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:53,240 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-24 23:34:53,240 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-24 23:34:53,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-24 23:34:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-24 23:34:53,244 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:53,245 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:53,261 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-24 23:34:53,448 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:53,449 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:53,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-24 23:34:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:53,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562951570] [2024-09-24 23:34:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:53,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:34:53,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667048600] [2024-09-24 23:34:53,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:34:53,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:53,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:53,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:53,474 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:34:53,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:34:53,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:34:53,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:34:53,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-24 23:34:53,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:34:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:34:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562951570] [2024-09-24 23:34:53,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:34:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667048600] [2024-09-24 23:34:53,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667048600] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:34:53,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:34:53,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-24 23:34:53,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616035537] [2024-09-24 23:34:53,875 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:34:53,875 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-24 23:34:53,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:34:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-24 23:34:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:34:53,879 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-24 23:34:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:34:54,062 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-24 23:34:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:34:54,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-24 23:34:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:34:54,064 INFO L225 Difference]: With dead ends: 129 [2024-09-24 23:34:54,064 INFO L226 Difference]: Without dead ends: 127 [2024-09-24 23:34:54,065 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-24 23:34:54,066 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:34:54,066 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:34:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-24 23:34:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-24 23:34:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-24 23:34:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-24 23:34:54,096 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-24 23:34:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:34:54,097 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-24 23:34:54,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-24 23:34:54,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-24 23:34:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-24 23:34:54,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:34:54,099 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:34:54,115 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-24 23:34:54,299 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:54,300 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:34:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:34:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-24 23:34:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:34:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263056306] [2024-09-24 23:34:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:34:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:34:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:34:54,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726160999] [2024-09-24 23:34:54,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:34:54,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:34:54,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:34:54,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:34:54,333 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:34:54,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:34:54,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:34:54,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-24 23:34:54,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:34:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-24 23:34:55,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:09,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:09,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263056306] [2024-09-24 23:35:09,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:09,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726160999] [2024-09-24 23:35:09,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726160999] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:35:09,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:35:09,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-24 23:35:09,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69882562] [2024-09-24 23:35:09,137 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:09,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:35:09,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:35:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-09-24 23:35:09,139 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-24 23:35:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:09,759 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-24 23:35:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-24 23:35:09,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-24 23:35:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:09,763 INFO L225 Difference]: With dead ends: 133 [2024-09-24 23:35:09,763 INFO L226 Difference]: Without dead ends: 131 [2024-09-24 23:35:09,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:35:09,764 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:09,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:35:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-24 23:35:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-24 23:35:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-24 23:35:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-24 23:35:09,803 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-24 23:35:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:09,805 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-24 23:35:09,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-24 23:35:09,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-24 23:35:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-24 23:35:09,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:09,807 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:09,824 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-24 23:35:10,007 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-24 23:35:10,008 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:10,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:10,008 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-24 23:35:10,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:10,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37433511] [2024-09-24 23:35:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:10,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:10,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420564292] [2024-09-24 23:35:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:10,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:10,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:35:10,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:35:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:10,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-24 23:35:10,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-24 23:35:10,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-24 23:35:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37433511] [2024-09-24 23:35:11,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420564292] [2024-09-24 23:35:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420564292] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:11,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:35:11,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-24 23:35:11,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770731846] [2024-09-24 23:35:11,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:11,487 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:35:11,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:35:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:35:11,488 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-24 23:35:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:14,766 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-24 23:35:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-24 23:35:14,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-24 23:35:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:14,769 INFO L225 Difference]: With dead ends: 229 [2024-09-24 23:35:14,769 INFO L226 Difference]: Without dead ends: 225 [2024-09-24 23:35:14,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-24 23:35:14,771 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:14,771 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-24 23:35:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-24 23:35:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-24 23:35:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-24 23:35:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-24 23:35:14,851 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-24 23:35:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:14,852 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-24 23:35:14,852 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-24 23:35:14,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-24 23:35:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-24 23:35:14,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:14,853 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:14,869 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-24 23:35:15,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-24 23:35:15,054 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:15,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:15,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-24 23:35:15,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:15,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810165248] [2024-09-24 23:35:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:15,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:35:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:35:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:35:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:35:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:35:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-24 23:35:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:35:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:35:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:35:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:35:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-24 23:35:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-24 23:35:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-24 23:35:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-24 23:35:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-24 23:35:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-24 23:35:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-24 23:35:15,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:15,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810165248] [2024-09-24 23:35:15,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810165248] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:15,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:15,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:35:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310490694] [2024-09-24 23:35:15,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:15,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:35:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:35:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:35:15,172 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-24 23:35:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:15,321 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-24 23:35:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:35:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-24 23:35:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:15,324 INFO L225 Difference]: With dead ends: 275 [2024-09-24 23:35:15,324 INFO L226 Difference]: Without dead ends: 201 [2024-09-24 23:35:15,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:35:15,329 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:15,330 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:35:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-24 23:35:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-24 23:35:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-24 23:35:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-24 23:35:15,410 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-24 23:35:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:15,410 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-24 23:35:15,410 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-24 23:35:15,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-24 23:35:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-24 23:35:15,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:15,415 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:15,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-24 23:35:15,416 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:15,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:15,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-24 23:35:15,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:15,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114854055] [2024-09-24 23:35:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:15,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762416474] [2024-09-24 23:35:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:15,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:15,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:15,444 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:35:15,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:35:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:15,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-24 23:35:15,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-24 23:35:17,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:17,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:17,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114854055] [2024-09-24 23:35:17,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:17,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762416474] [2024-09-24 23:35:17,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762416474] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:35:17,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:35:17,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-24 23:35:17,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326692743] [2024-09-24 23:35:17,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:17,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:35:17,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:17,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:35:17,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:35:17,323 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-24 23:35:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:18,129 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-09-24 23:35:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:35:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-24 23:35:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:18,131 INFO L225 Difference]: With dead ends: 201 [2024-09-24 23:35:18,132 INFO L226 Difference]: Without dead ends: 199 [2024-09-24 23:35:18,132 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:35:18,132 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:18,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:35:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-24 23:35:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-24 23:35:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 80 states have call successors, (80), 16 states have call predecessors, (80), 15 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-24 23:35:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-09-24 23:35:18,225 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-09-24 23:35:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:18,226 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-09-24 23:35:18,226 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-24 23:35:18,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-09-24 23:35:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-24 23:35:18,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:18,228 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:18,244 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-24 23:35:18,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:18,432 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:18,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-24 23:35:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:18,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662512513] [2024-09-24 23:35:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:35:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:35:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:35:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:35:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:35:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-24 23:35:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:35:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:35:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:35:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:35:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-24 23:35:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-24 23:35:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-24 23:35:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-24 23:35:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-24 23:35:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-24 23:35:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-24 23:35:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-24 23:35:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-24 23:35:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-24 23:35:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-24 23:35:18,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:18,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662512513] [2024-09-24 23:35:18,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662512513] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:35:18,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175896025] [2024-09-24 23:35:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:18,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:18,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:18,622 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:35:18,624 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-24 23:35:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:18,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:35:18,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-24 23:35:18,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-24 23:35:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175896025] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:18,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:35:18,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-24 23:35:18,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650193411] [2024-09-24 23:35:18,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:18,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:35:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:35:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:35:18,810 INFO L87 Difference]: Start difference. First operand 197 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-24 23:35:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:19,019 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-09-24 23:35:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-24 23:35:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-24 23:35:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:19,021 INFO L225 Difference]: With dead ends: 227 [2024-09-24 23:35:19,021 INFO L226 Difference]: Without dead ends: 215 [2024-09-24 23:35:19,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:35:19,022 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:19,022 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:35:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-24 23:35:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-24 23:35:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-24 23:35:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-24 23:35:19,090 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-24 23:35:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:19,091 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-24 23:35:19,091 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-24 23:35:19,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-24 23:35:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-24 23:35:19,092 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:19,092 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:19,109 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-24 23:35:19,293 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 23:35:19,293 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:19,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-24 23:35:19,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:19,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916061532] [2024-09-24 23:35:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:19,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:19,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627463742] [2024-09-24 23:35:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:35:19,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:19,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:35:19,331 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-24 23:35:19,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:35:19,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:35:19,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-24 23:35:19,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-24 23:35:19,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:19,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916061532] [2024-09-24 23:35:19,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627463742] [2024-09-24 23:35:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627463742] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:35:19,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:35:19,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-24 23:35:19,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120265812] [2024-09-24 23:35:19,827 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:19,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-24 23:35:19,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:19,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-24 23:35:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:35:19,828 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-24 23:35:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:20,043 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-24 23:35:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:35:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-24 23:35:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:20,046 INFO L225 Difference]: With dead ends: 230 [2024-09-24 23:35:20,047 INFO L226 Difference]: Without dead ends: 227 [2024-09-24 23:35:20,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:35:20,051 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:20,051 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 290 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:35:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-24 23:35:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-24 23:35:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-24 23:35:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-24 23:35:20,125 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-24 23:35:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:20,126 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-24 23:35:20,126 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-24 23:35:20,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-24 23:35:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-24 23:35:20,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:20,128 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:20,145 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-24 23:35:20,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 23:35:20,329 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:20,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-24 23:35:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672343919] [2024-09-24 23:35:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:20,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891349561] [2024-09-24 23:35:20,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:35:20,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:20,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:20,364 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:35:20,366 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-24 23:35:20,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:35:20,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:35:20,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-24 23:35:20,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-24 23:35:20,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-24 23:35:21,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:21,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672343919] [2024-09-24 23:35:21,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:21,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891349561] [2024-09-24 23:35:21,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891349561] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:21,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:35:21,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-24 23:35:21,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072452713] [2024-09-24 23:35:21,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:21,269 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 23:35:21,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 23:35:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:35:21,270 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-24 23:35:22,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:22,551 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-24 23:35:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-24 23:35:22,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-24 23:35:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:22,553 INFO L225 Difference]: With dead ends: 253 [2024-09-24 23:35:22,553 INFO L226 Difference]: Without dead ends: 251 [2024-09-24 23:35:22,554 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:35:22,554 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:22,554 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-24 23:35:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-24 23:35:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-24 23:35:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-24 23:35:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-24 23:35:22,663 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-24 23:35:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:22,664 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-24 23:35:22,664 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-24 23:35:22,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-24 23:35:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-24 23:35:22,666 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:22,666 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:22,682 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-24 23:35:22,870 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 23:35:22,870 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:22,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-24 23:35:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:22,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587701919] [2024-09-24 23:35:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:22,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950667794] [2024-09-24 23:35:22,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:35:22,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:22,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:22,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:35:22,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-24 23:35:22,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:35:22,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:35:22,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-24 23:35:22,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-24 23:35:23,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:55,650 WARN L293 SmtUtils]: Spent 9.60s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:36:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 62 refuted. 5 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-24 23:36:24,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:36:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587701919] [2024-09-24 23:36:24,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:36:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950667794] [2024-09-24 23:36:24,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950667794] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:36:24,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:36:24,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2024-09-24 23:36:24,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581735337] [2024-09-24 23:36:24,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:36:24,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:36:24,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:36:24,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:36:24,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=388, Unknown=3, NotChecked=0, Total=506 [2024-09-24 23:36:24,204 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-24 23:36:28,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:36:33,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:37:08,055 WARN L293 SmtUtils]: Spent 34.14s on a formula simplification. DAG size of input: 95 DAG size of output: 94 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:37:18,581 WARN L293 SmtUtils]: Spent 9.74s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:37:22,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:37:28,923 WARN L293 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:37:30,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:37:43,202 WARN L293 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:37:52,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:37:58,410 WARN L293 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:38:02,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:38:07,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:38:11,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:38:13,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:38:27,434 WARN L293 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 52 DAG size of output: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:38:31,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:38:53,007 WARN L293 SmtUtils]: Spent 19.02s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:38:57,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:39:01,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:39:09,281 WARN L293 SmtUtils]: Spent 7.39s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:39:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:39:10,565 INFO L93 Difference]: Finished difference Result 318 states and 455 transitions. [2024-09-24 23:39:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-24 23:39:10,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 128 [2024-09-24 23:39:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:39:10,568 INFO L225 Difference]: With dead ends: 318 [2024-09-24 23:39:10,568 INFO L226 Difference]: Without dead ends: 316 [2024-09-24 23:39:10,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 140.5s TimeCoverageRelationStatistics Valid=399, Invalid=1080, Unknown=3, NotChecked=0, Total=1482 [2024-09-24 23:39:10,570 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 81 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 116 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:39:10,570 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 503 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 533 Invalid, 10 Unknown, 0 Unchecked, 51.8s Time] [2024-09-24 23:39:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-24 23:39:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2024-09-24 23:39:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 162 states have internal predecessors, (186), 131 states have call successors, (131), 21 states have call predecessors, (131), 20 states have return successors, (128), 126 states have call predecessors, (128), 128 states have call successors, (128) [2024-09-24 23:39:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 445 transitions. [2024-09-24 23:39:10,867 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 445 transitions. Word has length 128 [2024-09-24 23:39:10,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:39:10,867 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 445 transitions. [2024-09-24 23:39:10,867 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-24 23:39:10,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:39:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 445 transitions. [2024-09-24 23:39:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-24 23:39:10,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:39:10,869 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:39:10,887 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-24 23:39:11,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-24 23:39:11,070 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:39:11,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:39:11,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-24 23:39:11,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:39:11,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329234013] [2024-09-24 23:39:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:39:11,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:39:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:39:11,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506597859] [2024-09-24 23:39:11,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:39:11,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:39:11,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:39:11,093 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:39:11,096 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-24 23:39:11,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-24 23:39:11,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:39:11,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-24 23:39:11,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:39:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 102 proven. 91 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-24 23:39:12,562 INFO L327 TraceCheckSpWp]: Computing backward predicates...