./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 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/egcd3-ll_valuebound20.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 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:54:24,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:54:25,068 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:54:25,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:54:25,075 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:54:25,106 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:54:25,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:54:25,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:54:25,110 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:54:25,110 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:54:25,111 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:54:25,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:54:25,114 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:54:25,115 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:54:25,115 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:54:25,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:54:25,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:54:25,116 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:54:25,116 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:54:25,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:54:25,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:54:25,121 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:54:25,121 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:54:25,121 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:54:25,121 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:54:25,122 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:54:25,122 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:54:25,122 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:54:25,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:54:25,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:54:25,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:54:25,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:54:25,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:54:25,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:54:25,127 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:54:25,127 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:54:25,127 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:54:25,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:54:25,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:54:25,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:54:25,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:54:25,130 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:54:25,130 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 -> 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 10:54:25,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:54:25,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:54:25,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:54:25,501 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:54:25,502 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:54:25,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2024-09-25 10:54:27,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:54:27,231 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:54:27,233 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2024-09-25 10:54:27,240 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ad27d0ba7/6e683d47b88743b3ad6d2f1692a97ed8/FLAG26d768fb3 [2024-09-25 10:54:27,253 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ad27d0ba7/6e683d47b88743b3ad6d2f1692a97ed8 [2024-09-25 10:54:27,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:54:27,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:54:27,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:54:27,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:54:27,263 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:54:27,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609f5146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27, skipping insertion in model container [2024-09-25 10:54:27,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,282 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:54:27,448 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/egcd3-ll_valuebound20.c[490,503] [2024-09-25 10:54:27,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:54:27,491 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:54:27,503 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/egcd3-ll_valuebound20.c[490,503] [2024-09-25 10:54:27,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:54:27,539 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:54:27,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27 WrapperNode [2024-09-25 10:54:27,540 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:54:27,541 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:54:27,541 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:54:27,541 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:54:27,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,555 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,561 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:54:27,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:54:27,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:54:27,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:54:27,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:54:27,573 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,575 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,598 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]. [2024-09-25 10:54:27,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,601 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,604 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,613 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,614 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:54:27,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:54:27,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:54:27,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:54:27,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (1/1) ... [2024-09-25 10:54:27,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:54:27,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:27,651 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) [2024-09-25 10:54:27,657 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 [2024-09-25 10:54:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:54:27,702 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 10:54:27,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 10:54:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:54:27,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:54:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:54:27,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:54:27,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:54:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:54:27,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:54:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:54:27,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:54:27,771 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:54:27,773 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:54:27,978 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-25 10:54:27,978 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:54:28,003 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:54:28,003 INFO L317 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-25 10:54:28,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:54:28 BoogieIcfgContainer [2024-09-25 10:54:28,004 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:54:28,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:54:28,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:54:28,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:54:28,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:54:27" (1/3) ... [2024-09-25 10:54:28,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de2d11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:54:28, skipping insertion in model container [2024-09-25 10:54:28,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:54:27" (2/3) ... [2024-09-25 10:54:28,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de2d11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:54:28, skipping insertion in model container [2024-09-25 10:54:28,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:54:28" (3/3) ... [2024-09-25 10:54:28,012 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2024-09-25 10:54:28,030 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:54:28,030 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:54:28,086 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:54:28,093 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;@78c34168, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:54:28,094 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:54:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:54:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 10:54:28,107 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:28,108 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:28,109 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:28,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-25 10:54:28,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:28,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932698470] [2024-09-25 10:54:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:28,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:54:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:54:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:54:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:54:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:54:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:54:28,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:28,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932698470] [2024-09-25 10:54:28,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932698470] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:54:28,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:54:28,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 10:54:28,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341234059] [2024-09-25 10:54:28,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:28,351 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 10:54:28,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 10:54:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:54:28,377 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 10:54:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:28,411 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-25 10:54:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 10:54:28,413 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-25 10:54:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:28,426 INFO L225 Difference]: With dead ends: 70 [2024-09-25 10:54:28,426 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 10:54:28,429 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:54:28,432 INFO L434 NwaCegarLoop]: 45 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, 45 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 [2024-09-25 10:54:28,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:54:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 10:54:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-25 10:54:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:54:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-25 10:54:28,468 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-25 10:54:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:28,469 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-25 10:54:28,469 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 10:54:28,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-25 10:54:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 10:54:28,471 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:28,472 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:28,472 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:54:28,472 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:28,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-25 10:54:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710264276] [2024-09-25 10:54:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:28,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:54:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:54:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:54:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:54:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:54:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:54:28,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:28,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710264276] [2024-09-25 10:54:28,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710264276] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:54:28,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:54:28,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 10:54:28,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514709006] [2024-09-25 10:54:28,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:28,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:54:28,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:54:28,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:54:28,870 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-25 10:54:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:28,989 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-25 10:54:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:54:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-25 10:54:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:28,992 INFO L225 Difference]: With dead ends: 53 [2024-09-25 10:54:28,992 INFO L226 Difference]: Without dead ends: 46 [2024-09-25 10:54:28,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:54:28,995 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:28,996 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:54:28,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-25 10:54:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-25 10:54:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:54:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-25 10:54:29,020 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-25 10:54:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:29,020 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-25 10:54:29,021 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-25 10:54:29,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-25 10:54:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 10:54:29,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:29,024 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:29,024 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 10:54:29,025 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:29,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-25 10:54:29,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:29,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540021917] [2024-09-25 10:54:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:29,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137022429] [2024-09-25 10:54:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:29,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:29,065 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) [2024-09-25 10:54:29,066 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:54:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:29,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:54:29,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:54:29,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:54:29,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:29,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540021917] [2024-09-25 10:54:29,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137022429] [2024-09-25 10:54:29,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137022429] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:54:29,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:54:29,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:54:29,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356042919] [2024-09-25 10:54:29,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:29,267 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:54:29,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:54:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:54:29,268 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-25 10:54:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:29,335 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-25 10:54:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:54:29,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-25 10:54:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:29,337 INFO L225 Difference]: With dead ends: 52 [2024-09-25 10:54:29,339 INFO L226 Difference]: Without dead ends: 50 [2024-09-25 10:54:29,339 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:54:29,340 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:29,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:54:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-25 10:54:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-25 10:54:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:54:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-25 10:54:29,363 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-25 10:54:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:29,363 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-25 10:54:29,363 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-25 10:54:29,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-25 10:54:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-25 10:54:29,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:29,369 INFO L216 NwaCegarLoop]: trace histogram [4, 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] [2024-09-25 10:54:29,387 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 10:54:29,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:29,570 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:29,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-25 10:54:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:29,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104257695] [2024-09-25 10:54:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:29,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:29,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:54:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:29,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:54:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:29,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:54:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:29,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:54:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:29,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:54:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:54:29,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:29,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104257695] [2024-09-25 10:54:29,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104257695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:29,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517441111] [2024-09-25 10:54:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:29,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:29,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:29,768 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) [2024-09-25 10:54:29,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:54:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:29,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:54:29,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:54:29,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:54:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517441111] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:54:29,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:54:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-25 10:54:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187721038] [2024-09-25 10:54:29,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:29,976 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 10:54:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 10:54:29,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:54:29,977 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 10:54:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:30,192 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-25 10:54:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:54:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-25 10:54:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:30,195 INFO L225 Difference]: With dead ends: 102 [2024-09-25 10:54:30,195 INFO L226 Difference]: Without dead ends: 95 [2024-09-25 10:54:30,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:54:30,196 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:30,198 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:54:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-25 10:54:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-25 10:54:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:54:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-25 10:54:30,221 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-25 10:54:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:30,225 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-25 10:54:30,225 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 10:54:30,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-25 10:54:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-25 10:54:30,227 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:30,227 INFO L216 NwaCegarLoop]: trace histogram [4, 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] [2024-09-25 10:54:30,240 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 10:54:30,428 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:30,428 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:30,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:30,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-25 10:54:30,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:30,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646589412] [2024-09-25 10:54:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:30,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947927754] [2024-09-25 10:54:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:30,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:30,454 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) [2024-09-25 10:54:30,466 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:54:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:30,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:54:30,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:54:30,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:54:30,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:30,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646589412] [2024-09-25 10:54:30,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:30,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947927754] [2024-09-25 10:54:30,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947927754] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:54:30,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:54:30,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:54:30,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394227454] [2024-09-25 10:54:30,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:30,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:54:30,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:30,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:54:30,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:54:30,589 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 10:54:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:30,645 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-25 10:54:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:54:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-25 10:54:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:30,647 INFO L225 Difference]: With dead ends: 78 [2024-09-25 10:54:30,647 INFO L226 Difference]: Without dead ends: 76 [2024-09-25 10:54:30,647 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:54:30,648 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:30,648 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:54:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-25 10:54:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-25 10:54:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:54:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-25 10:54:30,664 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-25 10:54:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:30,664 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-25 10:54:30,665 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 10:54:30,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-25 10:54:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-25 10:54:30,666 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:30,666 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-09-25 10:54:30,684 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 10:54:30,870 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:30,871 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:30,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-25 10:54:30,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:30,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448485293] [2024-09-25 10:54:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:30,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:30,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670928797] [2024-09-25 10:54:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:30,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:30,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:30,902 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) [2024-09-25 10:54:30,907 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:54:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:30,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:54:30,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 10:54:31,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:54:31,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448485293] [2024-09-25 10:54:31,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670928797] [2024-09-25 10:54:31,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670928797] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:54:31,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:54:31,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-25 10:54:31,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422346399] [2024-09-25 10:54:31,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:31,609 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:54:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:54:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:54:31,610 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 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) [2024-09-25 10:54:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:32,973 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-25 10:54:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:54:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 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 41 [2024-09-25 10:54:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:32,975 INFO L225 Difference]: With dead ends: 132 [2024-09-25 10:54:32,975 INFO L226 Difference]: Without dead ends: 130 [2024-09-25 10:54:32,976 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-25 10:54:32,977 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:32,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-25 10:54:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-25 10:54:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-25 10:54:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-25 10:54:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-25 10:54:33,014 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-25 10:54:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:33,015 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-25 10:54:33,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 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) [2024-09-25 10:54:33,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-25 10:54:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 10:54:33,017 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:33,017 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:33,034 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:54:33,221 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:33,222 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:33,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:33,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-25 10:54:33,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:33,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957770813] [2024-09-25 10:54:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:33,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:33,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059790348] [2024-09-25 10:54:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:33,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:33,237 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) [2024-09-25 10:54:33,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:54:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:33,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:54:33,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:54:33,327 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:54:33,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:33,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957770813] [2024-09-25 10:54:33,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:33,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059790348] [2024-09-25 10:54:33,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059790348] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:54:33,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:54:33,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:54:33,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164704827] [2024-09-25 10:54:33,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:33,329 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:54:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:33,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:54:33,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:54:33,330 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 10:54:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:33,440 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-25 10:54:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:54:33,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-25 10:54:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:33,442 INFO L225 Difference]: With dead ends: 155 [2024-09-25 10:54:33,442 INFO L226 Difference]: Without dead ends: 153 [2024-09-25 10:54:33,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:54:33,443 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:33,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:54:33,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-25 10:54:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-25 10:54:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-25 10:54:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-25 10:54:33,490 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-25 10:54:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:33,490 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-25 10:54:33,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 10:54:33,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-25 10:54:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 10:54:33,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:33,492 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-09-25 10:54:33,510 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 10:54:33,693 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-25 10:54:33,694 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:33,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-25 10:54:33,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:33,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009771700] [2024-09-25 10:54:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:33,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:33,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820564258] [2024-09-25 10:54:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:33,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:33,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:33,721 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) [2024-09-25 10:54:33,723 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:54:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:33,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-25 10:54:33,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:54:33,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:33,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009771700] [2024-09-25 10:54:33,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:33,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820564258] [2024-09-25 10:54:33,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820564258] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:33,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:54:33,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-25 10:54:33,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182624627] [2024-09-25 10:54:33,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:33,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 10:54:33,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:33,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 10:54:33,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:54:33,965 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 10:54:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:34,158 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-25 10:54:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:54:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-25 10:54:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:34,161 INFO L225 Difference]: With dead ends: 174 [2024-09-25 10:54:34,161 INFO L226 Difference]: Without dead ends: 172 [2024-09-25 10:54:34,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-25 10:54:34,162 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:34,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:54:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-25 10:54:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-25 10:54:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-25 10:54:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-25 10:54:34,213 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-25 10:54:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:34,214 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-25 10:54:34,214 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 10:54:34,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-25 10:54:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-25 10:54:34,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:34,216 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-09-25 10:54:34,232 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 10:54:34,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:34,417 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:34,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-25 10:54:34,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:34,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720517474] [2024-09-25 10:54:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:34,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240966106] [2024-09-25 10:54:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:34,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:34,435 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) [2024-09-25 10:54:34,441 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:54:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:34,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:54:34,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 10:54:34,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:54:34,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:34,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720517474] [2024-09-25 10:54:34,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:34,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240966106] [2024-09-25 10:54:34,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240966106] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:54:34,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:54:34,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:54:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437226894] [2024-09-25 10:54:34,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:34,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:54:34,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:34,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:54:34,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:54:34,528 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-09-25 10:54:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:34,653 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-25 10:54:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:54:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 51 [2024-09-25 10:54:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:34,655 INFO L225 Difference]: With dead ends: 254 [2024-09-25 10:54:34,655 INFO L226 Difference]: Without dead ends: 252 [2024-09-25 10:54:34,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:54:34,656 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:34,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:54:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-25 10:54:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-25 10:54:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-25 10:54:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-25 10:54:34,741 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-25 10:54:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:34,741 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-25 10:54:34,741 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-09-25 10:54:34,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-25 10:54:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-25 10:54:34,742 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:34,742 INFO L216 NwaCegarLoop]: trace histogram [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, 1] [2024-09-25 10:54:34,759 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 10:54:34,943 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:34,943 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:34,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-25 10:54:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:34,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071291153] [2024-09-25 10:54:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:35,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:54:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:35,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:54:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:35,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:54:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:35,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:54:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:35,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:54:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:35,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:54:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:54:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071291153] [2024-09-25 10:54:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071291153] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:54:35,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:54:35,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:54:35,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748765093] [2024-09-25 10:54:35,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:35,055 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:54:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:54:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:54:35,056 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 10:54:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:35,223 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-25 10:54:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:54:35,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-09-25 10:54:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:35,227 INFO L225 Difference]: With dead ends: 291 [2024-09-25 10:54:35,227 INFO L226 Difference]: Without dead ends: 177 [2024-09-25 10:54:35,231 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:54:35,231 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:35,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:54:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-25 10:54:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-25 10:54:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-25 10:54:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-25 10:54:35,292 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-25 10:54:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:35,292 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-25 10:54:35,292 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 10:54:35,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-25 10:54:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-25 10:54:35,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:35,294 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1] [2024-09-25 10:54:35,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-25 10:54:35,294 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:35,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:35,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-25 10:54:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:35,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403814461] [2024-09-25 10:54:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:35,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:35,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036559283] [2024-09-25 10:54:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:35,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:35,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:35,313 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) [2024-09-25 10:54:35,315 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:54:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:35,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-25 10:54:35,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-25 10:54:36,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-25 10:54:37,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403814461] [2024-09-25 10:54:37,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036559283] [2024-09-25 10:54:37,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036559283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:54:37,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:54:37,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-25 10:54:37,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779530847] [2024-09-25 10:54:37,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:37,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:54:37,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:54:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:54:37,805 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-25 10:54:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:41,971 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-25 10:54:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-25 10:54:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-09-25 10:54:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:41,975 INFO L225 Difference]: With dead ends: 393 [2024-09-25 10:54:41,975 INFO L226 Difference]: Without dead ends: 385 [2024-09-25 10:54:41,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:54:41,977 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:41,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-25 10:54:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-25 10:54:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-25 10:54:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-09-25 10:54:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-25 10:54:42,087 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-25 10:54:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:42,087 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-25 10:54:42,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-25 10:54:42,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-25 10:54:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-25 10:54:42,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:42,094 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2024-09-25 10:54:42,113 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 10:54:42,294 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:42,295 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:42,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-25 10:54:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068655888] [2024-09-25 10:54:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:54:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:54:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:54:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:54:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:54:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:54:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:54:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:54:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:54:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:54:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:54:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:54:42,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:42,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068655888] [2024-09-25 10:54:42,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068655888] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:54:42,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:54:42,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:54:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768550230] [2024-09-25 10:54:42,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:42,406 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:54:42,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:54:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:54:42,407 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-25 10:54:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:42,584 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-25 10:54:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:54:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-25 10:54:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:42,588 INFO L225 Difference]: With dead ends: 399 [2024-09-25 10:54:42,588 INFO L226 Difference]: Without dead ends: 243 [2024-09-25 10:54:42,589 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:54:42,589 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:42,589 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:54:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-25 10:54:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-25 10:54:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-25 10:54:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-25 10:54:42,724 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-25 10:54:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:42,724 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-25 10:54:42,725 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-25 10:54:42,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-25 10:54:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 10:54:42,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:42,726 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2024-09-25 10:54:42,726 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-25 10:54:42,726 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:42,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-25 10:54:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832763437] [2024-09-25 10:54:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:42,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600382982] [2024-09-25 10:54:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:42,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:42,742 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) [2024-09-25 10:54:42,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:54:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:42,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-25 10:54:42,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-25 10:54:42,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-25 10:54:42,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:42,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832763437] [2024-09-25 10:54:42,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:42,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600382982] [2024-09-25 10:54:42,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600382982] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:42,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:54:42,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-25 10:54:42,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413885097] [2024-09-25 10:54:42,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:54:42,918 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:54:42,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:42,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:54:42,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:54:42,919 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-25 10:54:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:43,059 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-25 10:54:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:54:43,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-25 10:54:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:43,062 INFO L225 Difference]: With dead ends: 234 [2024-09-25 10:54:43,062 INFO L226 Difference]: Without dead ends: 232 [2024-09-25 10:54:43,062 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:54:43,063 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:43,064 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:54:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-25 10:54:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-25 10:54:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-25 10:54:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-25 10:54:43,165 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-25 10:54:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:43,166 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-25 10:54:43,166 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-25 10:54:43,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-25 10:54:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-25 10:54:43,167 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:43,167 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2024-09-25 10:54:43,182 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 10:54:43,367 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 10:54:43,368 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:43,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-25 10:54:43,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:43,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424733404] [2024-09-25 10:54:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:43,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:43,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381190095] [2024-09-25 10:54:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:43,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:43,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:43,385 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) [2024-09-25 10:54:43,387 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 10:54:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:43,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-25 10:54:43,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 10:54:43,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-25 10:54:44,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:44,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424733404] [2024-09-25 10:54:44,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:44,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381190095] [2024-09-25 10:54:44,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381190095] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:54:44,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:54:44,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-25 10:54:44,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808561700] [2024-09-25 10:54:44,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:44,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:54:44,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:44,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:54:44,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:54:44,736 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-25 10:54:50,265 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 [] [2024-09-25 10:54:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:54,236 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-09-25 10:54:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-25 10:54:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-09-25 10:54:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:54,239 INFO L225 Difference]: With dead ends: 350 [2024-09-25 10:54:54,239 INFO L226 Difference]: Without dead ends: 348 [2024-09-25 10:54:54,240 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:54:54,241 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 120 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:54,241 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 444 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 571 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2024-09-25 10:54:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-25 10:54:54,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-09-25 10:54:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 188 states have internal predecessors, (230), 123 states have call successors, (123), 15 states have call predecessors, (123), 14 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2024-09-25 10:54:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-09-25 10:54:54,418 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-09-25 10:54:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:54,418 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-09-25 10:54:54,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-25 10:54:54,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-09-25 10:54:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-25 10:54:54,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:54,420 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2024-09-25 10:54:54,437 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 10:54:54,620 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 10:54:54,621 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:54,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:54,621 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-25 10:54:54,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:54,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221135942] [2024-09-25 10:54:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:54,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:54,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859032465] [2024-09-25 10:54:54,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:54:54,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:54,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:54,638 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) [2024-09-25 10:54:54,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:54:54,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:54:54,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:54:54,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-25 10:54:54,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-25 10:54:54,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-25 10:54:54,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:54,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221135942] [2024-09-25 10:54:54,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:54,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859032465] [2024-09-25 10:54:54,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859032465] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:54:54,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:54:54,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-25 10:54:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558427462] [2024-09-25 10:54:54,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:54,974 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 10:54:54,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 10:54:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:54:54,975 INFO L87 Difference]: Start difference. First operand 325 states and 474 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-25 10:54:55,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:55,799 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-09-25 10:54:55,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 10:54:55,800 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-09-25 10:54:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:55,803 INFO L225 Difference]: With dead ends: 426 [2024-09-25 10:54:55,803 INFO L226 Difference]: Without dead ends: 424 [2024-09-25 10:54:55,804 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:54:55,804 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:55,805 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 271 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:54:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-09-25 10:54:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-09-25 10:54:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 155 states have call successors, (155), 17 states have call predecessors, (155), 16 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2024-09-25 10:54:56,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-09-25 10:54:56,022 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-09-25 10:54:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:56,022 INFO L474 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-09-25 10:54:56,023 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-25 10:54:56,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-09-25 10:54:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-25 10:54:56,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:56,024 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 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] [2024-09-25 10:54:56,032 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 10:54:56,224 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 10:54:56,224 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:56,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-25 10:54:56,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:56,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080134802] [2024-09-25 10:54:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:56,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:56,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126191587] [2024-09-25 10:54:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:56,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:56,242 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) [2024-09-25 10:54:56,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 10:54:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:56,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-25 10:54:56,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-25 10:54:56,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-25 10:54:58,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080134802] [2024-09-25 10:54:58,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126191587] [2024-09-25 10:54:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126191587] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:54:58,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:54:58,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-25 10:54:58,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396290639] [2024-09-25 10:54:58,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:58,556 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 10:54:58,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:58,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 10:54:58,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:54:58,557 INFO L87 Difference]: Start difference. First operand 403 states and 593 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-25 10:55:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:05,395 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-09-25 10:55:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-25 10:55:05,396 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-09-25 10:55:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:05,399 INFO L225 Difference]: With dead ends: 544 [2024-09-25 10:55:05,399 INFO L226 Difference]: Without dead ends: 540 [2024-09-25 10:55:05,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:55:05,401 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 210 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:05,401 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 708 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-25 10:55:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-25 10:55:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-09-25 10:55:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 302 states have (on average 1.2384105960264902) internal successors, (374), 303 states have internal predecessors, (374), 203 states have call successors, (203), 21 states have call predecessors, (203), 20 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-25 10:55:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-09-25 10:55:05,753 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-09-25 10:55:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:05,753 INFO L474 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-09-25 10:55:05,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-25 10:55:05,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-09-25 10:55:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-25 10:55:05,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:05,755 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-25 10:55:05,773 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-25 10:55:05,956 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 10:55:05,956 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:05,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:05,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-25 10:55:05,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:05,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70644747] [2024-09-25 10:55:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:05,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:55:05,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450201591] [2024-09-25 10:55:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:05,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:05,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:05,975 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) [2024-09-25 10:55:05,978 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 10:55:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:06,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:55:06,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-25 10:55:06,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:55:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-25 10:55:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:55:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70644747] [2024-09-25 10:55:06,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:55:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450201591] [2024-09-25 10:55:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450201591] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:55:06,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:55:06,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-25 10:55:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958104022] [2024-09-25 10:55:06,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:55:06,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:55:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:55:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:55:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:55:06,650 INFO L87 Difference]: Start difference. First operand 526 states and 778 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 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) [2024-09-25 10:55:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:08,749 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-09-25 10:55:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:55:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 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 98 [2024-09-25 10:55:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:08,759 INFO L225 Difference]: With dead ends: 1227 [2024-09-25 10:55:08,759 INFO L226 Difference]: Without dead ends: 1225 [2024-09-25 10:55:08,760 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:55:08,761 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 149 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:08,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 411 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:55:08,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-09-25 10:55:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-09-25 10:55:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 553 states have (on average 1.332730560578662) internal successors, (737), 554 states have internal predecessors, (737), 579 states have call successors, (579), 24 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-25 10:55:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-09-25 10:55:09,796 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-09-25 10:55:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:09,796 INFO L474 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-09-25 10:55:09,796 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 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) [2024-09-25 10:55:09,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-09-25 10:55:09,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:55:09,798 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:09,798 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 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] [2024-09-25 10:55:09,815 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 10:55:09,999 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-25 10:55:10,000 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:10,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-25 10:55:10,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:10,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585373121] [2024-09-25 10:55:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:10,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:55:10,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768484378] [2024-09-25 10:55:10,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:55:10,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:10,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:10,040 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) [2024-09-25 10:55:10,043 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 10:55:10,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 10:55:10,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:55:10,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-25 10:55:10,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-25 10:55:10,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:55:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-25 10:55:10,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:55:10,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585373121] [2024-09-25 10:55:10,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:55:10,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768484378] [2024-09-25 10:55:10,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768484378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:55:10,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:55:10,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-25 10:55:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116363185] [2024-09-25 10:55:10,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:55:10,720 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 10:55:10,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:55:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 10:55:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:55:10,721 INFO L87 Difference]: Start difference. First operand 1156 states and 1893 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-25 10:55:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:13,057 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-09-25 10:55:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 10:55:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-09-25 10:55:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:13,066 INFO L225 Difference]: With dead ends: 1373 [2024-09-25 10:55:13,066 INFO L226 Difference]: Without dead ends: 1369 [2024-09-25 10:55:13,067 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:55:13,068 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:13,068 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 393 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-25 10:55:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-09-25 10:55:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-09-25 10:55:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 555 states have (on average 1.3297297297297297) internal successors, (738), 555 states have internal predecessors, (738), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-25 10:55:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-09-25 10:55:14,290 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-09-25 10:55:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:14,290 INFO L474 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-09-25 10:55:14,290 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-25 10:55:14,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-09-25 10:55:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-25 10:55:14,292 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:14,293 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 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] [2024-09-25 10:55:14,300 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-25 10:55:14,493 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-25 10:55:14,494 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:14,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-25 10:55:14,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:14,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723489668] [2024-09-25 10:55:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:55:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:55:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:55:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:55:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:55:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:55:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:55:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:55:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:55:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:55:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:55:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:55:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:55:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:55:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-25 10:55:14,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:55:14,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723489668] [2024-09-25 10:55:14,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723489668] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:55:14,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655642658] [2024-09-25 10:55:14,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:55:14,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:14,762 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) [2024-09-25 10:55:14,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 10:55:14,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:55:14,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:55:14,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 10:55:14,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-25 10:55:14,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:55:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-25 10:55:15,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655642658] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:55:15,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:55:15,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-25 10:55:15,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975154721] [2024-09-25 10:55:15,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:55:15,040 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 10:55:15,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:55:15,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 10:55:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:55:15,041 INFO L87 Difference]: Start difference. First operand 1158 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-25 10:55:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:16,644 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-09-25 10:55:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 10:55:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-09-25 10:55:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:16,654 INFO L225 Difference]: With dead ends: 1291 [2024-09-25 10:55:16,654 INFO L226 Difference]: Without dead ends: 1286 [2024-09-25 10:55:16,655 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:55:16,655 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:16,655 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 457 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:55:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-25 10:55:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-09-25 10:55:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 549 states have (on average 1.331511839708561) internal successors, (731), 549 states have internal predecessors, (731), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-25 10:55:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-09-25 10:55:17,707 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-09-25 10:55:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:17,707 INFO L474 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-09-25 10:55:17,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-25 10:55:17,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-09-25 10:55:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:55:17,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:17,710 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:55:17,717 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 10:55:17,911 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:17,911 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:17,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-25 10:55:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:17,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810111363] [2024-09-25 10:55:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:55:17,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117549307] [2024-09-25 10:55:17,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:55:17,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:17,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:17,944 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) [2024-09-25 10:55:17,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 10:55:18,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:55:18,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:55:18,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-25 10:55:18,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-25 10:55:19,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:55:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-09-25 10:55:22,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:55:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810111363] [2024-09-25 10:55:22,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:55:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117549307] [2024-09-25 10:55:22,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117549307] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:55:22,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:55:22,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2024-09-25 10:55:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925747178] [2024-09-25 10:55:22,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:55:22,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 10:55:22,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:55:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 10:55:22,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:55:22,122 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-25 10:55:29,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-25 10:55:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:39,063 INFO L93 Difference]: Finished difference Result 1442 states and 2319 transitions. [2024-09-25 10:55:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-25 10:55:39,064 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 112 [2024-09-25 10:55:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:39,073 INFO L225 Difference]: With dead ends: 1442 [2024-09-25 10:55:39,073 INFO L226 Difference]: Without dead ends: 1436 [2024-09-25 10:55:39,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1488, Invalid=5994, Unknown=0, NotChecked=0, Total=7482 [2024-09-25 10:55:39,076 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 274 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:39,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1096 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-09-25 10:55:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2024-09-25 10:55:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1164. [2024-09-25 10:55:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 575 states have (on average 1.3165217391304347) internal successors, (757), 575 states have internal predecessors, (757), 559 states have call successors, (559), 31 states have call predecessors, (559), 29 states have return successors, (557), 557 states have call predecessors, (557), 557 states have call successors, (557) [2024-09-25 10:55:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1873 transitions. [2024-09-25 10:55:40,629 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1873 transitions. Word has length 112 [2024-09-25 10:55:40,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:40,630 INFO L474 AbstractCegarLoop]: Abstraction has 1164 states and 1873 transitions. [2024-09-25 10:55:40,630 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-25 10:55:40,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1873 transitions. [2024-09-25 10:55:40,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-25 10:55:40,633 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:40,633 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-25 10:55:40,642 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-25 10:55:40,833 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:40,834 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:40,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-25 10:55:40,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:40,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690678349] [2024-09-25 10:55:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:55:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909790833] [2024-09-25 10:55:40,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:55:40,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:40,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:40,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:55:40,869 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 10:55:40,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-25 10:55:40,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:55:40,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-25 10:55:40,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-25 10:55:41,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:55:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-25 10:55:44,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:55:44,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690678349] [2024-09-25 10:55:44,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:55:44,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909790833] [2024-09-25 10:55:44,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909790833] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:55:44,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:55:44,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-25 10:55:44,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828980834] [2024-09-25 10:55:44,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:55:44,230 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 10:55:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:55:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 10:55:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:55:44,231 INFO L87 Difference]: Start difference. First operand 1164 states and 1873 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-25 10:56:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:56:00,638 INFO L93 Difference]: Finished difference Result 1591 states and 2542 transitions. [2024-09-25 10:56:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-09-25 10:56:00,639 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-09-25 10:56:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:56:00,647 INFO L225 Difference]: With dead ends: 1591 [2024-09-25 10:56:00,648 INFO L226 Difference]: Without dead ends: 1585 [2024-09-25 10:56:00,651 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3547 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2066, Invalid=9490, Unknown=0, NotChecked=0, Total=11556 [2024-09-25 10:56:00,652 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 307 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-25 10:56:00,652 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 974 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-25 10:56:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2024-09-25 10:56:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1348. [2024-09-25 10:56:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 671 states have (on average 1.3129657228017884) internal successors, (881), 671 states have internal predecessors, (881), 643 states have call successors, (643), 35 states have call predecessors, (643), 33 states have return successors, (641), 641 states have call predecessors, (641), 641 states have call successors, (641) [2024-09-25 10:56:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2165 transitions. [2024-09-25 10:56:02,713 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2165 transitions. Word has length 115 [2024-09-25 10:56:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:56:02,713 INFO L474 AbstractCegarLoop]: Abstraction has 1348 states and 2165 transitions. [2024-09-25 10:56:02,713 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-25 10:56:02,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:56:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2165 transitions. [2024-09-25 10:56:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-25 10:56:02,715 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:56:02,715 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-25 10:56:02,722 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-25 10:56:02,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:56:02,916 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:56:02,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:56:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-25 10:56:02,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:56:02,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224316512] [2024-09-25 10:56:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:56:02,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:56:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:56:02,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025731636] [2024-09-25 10:56:02,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:56:02,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:56:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:56:02,945 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:56:02,947 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 10:56:03,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:56:03,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:56:03,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-25 10:56:03,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:56:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-25 10:56:04,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:56:05,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:56:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224316512] [2024-09-25 10:56:05,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:56:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025731636] [2024-09-25 10:56:05,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025731636] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:56:05,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:56:05,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-25 10:56:05,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571777937] [2024-09-25 10:56:05,666 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:56:05,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:56:05,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:56:05,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:56:05,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-09-25 10:56:05,668 INFO L87 Difference]: Start difference. First operand 1348 states and 2165 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-25 10:56:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:56:09,013 INFO L93 Difference]: Finished difference Result 1493 states and 2379 transitions. [2024-09-25 10:56:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:56:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-09-25 10:56:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:56:09,022 INFO L225 Difference]: With dead ends: 1493 [2024-09-25 10:56:09,023 INFO L226 Difference]: Without dead ends: 1488 [2024-09-25 10:56:09,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:56:09,024 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 86 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:56:09,025 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 800 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:56:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2024-09-25 10:56:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1462. [2024-09-25 10:56:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 725 states have (on average 1.3131034482758621) internal successors, (952), 725 states have internal predecessors, (952), 699 states have call successors, (699), 39 states have call predecessors, (699), 37 states have return successors, (697), 697 states have call predecessors, (697), 697 states have call successors, (697) [2024-09-25 10:56:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2348 transitions. [2024-09-25 10:56:11,461 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2348 transitions. Word has length 115 [2024-09-25 10:56:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:56:11,461 INFO L474 AbstractCegarLoop]: Abstraction has 1462 states and 2348 transitions. [2024-09-25 10:56:11,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-25 10:56:11,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:56:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2348 transitions. [2024-09-25 10:56:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:56:11,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:56:11,463 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 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] [2024-09-25 10:56:11,476 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-25 10:56:11,663 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-25 10:56:11,663 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:56:11,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:56:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-25 10:56:11,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:56:11,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792826783] [2024-09-25 10:56:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:56:11,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:56:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:56:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544744046] [2024-09-25 10:56:11,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:56:11,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:56:11,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:56:11,692 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:56:11,694 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 10:56:11,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-25 10:56:11,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:56:11,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-25 10:56:11,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:56:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-25 10:56:12,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:56:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-25 10:56:17,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:56:17,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792826783] [2024-09-25 10:56:17,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:56:17,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544744046] [2024-09-25 10:56:17,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544744046] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:56:17,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:56:17,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2024-09-25 10:56:17,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680052148] [2024-09-25 10:56:17,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:56:17,296 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 10:56:17,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:56:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 10:56:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:56:17,297 INFO L87 Difference]: Start difference. First operand 1462 states and 2348 transitions. Second operand has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-25 10:56:30,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-25 10:56:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:56:58,065 INFO L93 Difference]: Finished difference Result 2356 states and 3786 transitions. [2024-09-25 10:56:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-09-25 10:56:58,066 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 120 [2024-09-25 10:56:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:56:58,076 INFO L225 Difference]: With dead ends: 2356 [2024-09-25 10:56:58,076 INFO L226 Difference]: Without dead ends: 2350 [2024-09-25 10:56:58,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5531 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=3568, Invalid=14792, Unknown=0, NotChecked=0, Total=18360 [2024-09-25 10:56:58,081 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 457 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:56:58,081 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1308 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2024-09-25 10:56:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2024-09-25 10:57:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1808. [2024-09-25 10:57:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 916 states have (on average 1.3013100436681222) internal successors, (1192), 916 states have internal predecessors, (1192), 847 states have call successors, (847), 46 states have call predecessors, (847), 44 states have return successors, (845), 845 states have call predecessors, (845), 845 states have call successors, (845) [2024-09-25 10:57:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2884 transitions. [2024-09-25 10:57:01,861 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2884 transitions. Word has length 120 [2024-09-25 10:57:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:57:01,861 INFO L474 AbstractCegarLoop]: Abstraction has 1808 states and 2884 transitions. [2024-09-25 10:57:01,861 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-25 10:57:01,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:57:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2884 transitions. [2024-09-25 10:57:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-25 10:57:01,864 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:57:01,864 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2024-09-25 10:57:01,874 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-25 10:57:02,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-25 10:57:02,065 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:57:02,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:57:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-25 10:57:02,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:57:02,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119919440] [2024-09-25 10:57:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:57:02,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:57:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:57:02,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69083] [2024-09-25 10:57:02,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:57:02,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:57:02,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:57:02,088 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:57:02,090 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 10:57:02,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-25 10:57:02,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:57:02,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-25 10:57:02,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:57:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-25 10:57:02,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:57:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-25 10:57:05,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:57:05,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119919440] [2024-09-25 10:57:05,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:57:05,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69083] [2024-09-25 10:57:05,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69083] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:57:05,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:57:05,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-09-25 10:57:05,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239205005] [2024-09-25 10:57:05,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:57:05,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 10:57:05,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:57:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 10:57:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-09-25 10:57:05,709 INFO L87 Difference]: Start difference. First operand 1808 states and 2884 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-25 10:57:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:57:23,004 INFO L93 Difference]: Finished difference Result 2210 states and 3523 transitions. [2024-09-25 10:57:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-25 10:57:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 132 [2024-09-25 10:57:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:57:23,014 INFO L225 Difference]: With dead ends: 2210 [2024-09-25 10:57:23,014 INFO L226 Difference]: Without dead ends: 2204 [2024-09-25 10:57:23,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1277, Invalid=5695, Unknown=0, NotChecked=0, Total=6972 [2024-09-25 10:57:23,016 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 212 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-25 10:57:23,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 794 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-25 10:57:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2024-09-25 10:57:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2019. [2024-09-25 10:57:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1016 states have (on average 1.3061023622047243) internal successors, (1327), 1016 states have internal predecessors, (1327), 955 states have call successors, (955), 49 states have call predecessors, (955), 47 states have return successors, (953), 953 states have call predecessors, (953), 953 states have call successors, (953) [2024-09-25 10:57:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3235 transitions. [2024-09-25 10:57:27,311 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3235 transitions. Word has length 132 [2024-09-25 10:57:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:57:27,312 INFO L474 AbstractCegarLoop]: Abstraction has 2019 states and 3235 transitions. [2024-09-25 10:57:27,312 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-25 10:57:27,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:57:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3235 transitions. [2024-09-25 10:57:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-25 10:57:27,316 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:57:27,316 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-25 10:57:27,334 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-25 10:57:27,516 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-25 10:57:27,517 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:57:27,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:57:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 7 times [2024-09-25 10:57:27,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:57:27,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591641774] [2024-09-25 10:57:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:57:27,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:57:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:57:27,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424387276] [2024-09-25 10:57:27,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:57:27,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:57:27,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:57:27,544 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:57:27,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 10:57:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:57:27,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-25 10:57:27,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:57:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 38 proven. 69 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-25 10:57:28,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:57:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-25 10:57:32,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:57:32,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591641774] [2024-09-25 10:57:32,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:57:32,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424387276] [2024-09-25 10:57:32,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424387276] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:57:32,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:57:32,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2024-09-25 10:57:32,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024465381] [2024-09-25 10:57:32,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:57:32,569 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 10:57:32,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:57:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 10:57:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:57:32,570 INFO L87 Difference]: Start difference. First operand 2019 states and 3235 transitions. Second operand has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2024-09-25 10:58:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:58:13,026 INFO L93 Difference]: Finished difference Result 2697 states and 4265 transitions. [2024-09-25 10:58:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-09-25 10:58:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) Word has length 140 [2024-09-25 10:58:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:58:13,042 INFO L225 Difference]: With dead ends: 2697 [2024-09-25 10:58:13,042 INFO L226 Difference]: Without dead ends: 2493 [2024-09-25 10:58:13,046 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6856 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=3569, Invalid=17601, Unknown=0, NotChecked=0, Total=21170 [2024-09-25 10:58:13,047 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 558 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:58:13,047 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1188 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-09-25 10:58:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2024-09-25 10:58:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2201. [2024-09-25 10:58:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1113 states have (on average 1.3018867924528301) internal successors, (1449), 1113 states have internal predecessors, (1449), 1035 states have call successors, (1035), 54 states have call predecessors, (1035), 52 states have return successors, (1033), 1033 states have call predecessors, (1033), 1033 states have call successors, (1033) [2024-09-25 10:58:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3517 transitions. [2024-09-25 10:58:18,144 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3517 transitions. Word has length 140 [2024-09-25 10:58:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:58:18,145 INFO L474 AbstractCegarLoop]: Abstraction has 2201 states and 3517 transitions. [2024-09-25 10:58:18,145 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 10 states have call predecessors, (39), 10 states have call successors, (39) [2024-09-25 10:58:18,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:58:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3517 transitions. [2024-09-25 10:58:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-09-25 10:58:18,150 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:58:18,151 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-09-25 10:58:18,168 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-25 10:58:18,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-25 10:58:18,355 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:58:18,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:58:18,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1290054545, now seen corresponding path program 8 times [2024-09-25 10:58:18,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:58:18,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064493003] [2024-09-25 10:58:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:58:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:58:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:58:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:58:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:58:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:58:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:58:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:58:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:58:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:58:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:58:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:58:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:58:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:58:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:58:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:58:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-25 10:58:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:58:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:58:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:58:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-25 10:58:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:58:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-25 10:58:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-25 10:58:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-25 10:58:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-25 10:58:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-25 10:58:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:58:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-09-25 10:58:18,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:58:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064493003] [2024-09-25 10:58:18,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064493003] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:58:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172394617] [2024-09-25 10:58:18,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:58:18,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:58:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:58:18,555 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:58:18,559 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-25 10:58:18,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:58:18,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:58:18,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 10:58:18,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:58:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 458 proven. 18 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-09-25 10:58:18,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:58:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-09-25 10:58:18,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172394617] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:58:18,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:58:18,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-09-25 10:58:18,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375009878] [2024-09-25 10:58:18,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:58:18,845 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 10:58:18,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:58:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 10:58:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:58:18,845 INFO L87 Difference]: Start difference. First operand 2201 states and 3517 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-25 10:58:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:58:24,972 INFO L93 Difference]: Finished difference Result 3578 states and 5730 transitions. [2024-09-25 10:58:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:58:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 157 [2024-09-25 10:58:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:58:24,991 INFO L225 Difference]: With dead ends: 3578 [2024-09-25 10:58:24,992 INFO L226 Difference]: Without dead ends: 2493 [2024-09-25 10:58:24,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-25 10:58:24,999 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:58:25,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 248 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:58:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2024-09-25 10:58:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2297. [2024-09-25 10:58:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 1195 states have (on average 1.284518828451883) internal successors, (1535), 1227 states have internal predecessors, (1535), 1049 states have call successors, (1049), 54 states have call predecessors, (1049), 52 states have return successors, (1047), 1015 states have call predecessors, (1047), 1047 states have call successors, (1047) [2024-09-25 10:58:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3631 transitions. [2024-09-25 10:58:30,446 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3631 transitions. Word has length 157 [2024-09-25 10:58:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:58:30,447 INFO L474 AbstractCegarLoop]: Abstraction has 2297 states and 3631 transitions. [2024-09-25 10:58:30,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-25 10:58:30,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:58:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3631 transitions. [2024-09-25 10:58:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-25 10:58:30,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:58:30,453 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 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] [2024-09-25 10:58:30,461 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-25 10:58:30,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-25 10:58:30,658 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:58:30,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:58:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash -758309700, now seen corresponding path program 9 times [2024-09-25 10:58:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:58:30,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420126457] [2024-09-25 10:58:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:58:30,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:58:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:58:30,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258626307] [2024-09-25 10:58:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:58:30,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:58:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:58:30,691 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:58:30,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-25 10:58:30,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 10:58:30,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:58:30,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-25 10:58:30,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:58:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 105 proven. 48 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2024-09-25 10:58:32,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:58:33,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:58:33,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420126457] [2024-09-25 10:58:33,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:58:33,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258626307] [2024-09-25 10:58:33,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258626307] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:58:33,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:58:33,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 10:58:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813890795] [2024-09-25 10:58:33,733 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:58:33,733 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:58:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:58:33,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:58:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:58:33,734 INFO L87 Difference]: Start difference. First operand 2297 states and 3631 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-25 10:58:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:58:40,987 INFO L93 Difference]: Finished difference Result 2587 states and 4085 transitions. [2024-09-25 10:58:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:58:40,988 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 159 [2024-09-25 10:58:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:58:41,002 INFO L225 Difference]: With dead ends: 2587 [2024-09-25 10:58:41,002 INFO L226 Difference]: Without dead ends: 2582 [2024-09-25 10:58:41,003 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:58:41,003 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 72 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:58:41,004 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 587 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 10:58:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states.