./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.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 a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:49:43,331 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:49:43,383 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:49:43,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:49:43,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:49:43,410 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:49:43,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:49:43,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:49:43,413 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:49:43,413 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:49:43,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:49:43,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:49:43,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:49:43,416 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:49:43,416 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:49:43,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:49:43,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:49:43,417 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:49:43,417 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:49:43,417 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:49:43,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:49:43,418 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:49:43,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:49:43,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:49:43,421 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:49:43,421 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:49:43,421 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:49:43,421 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:49:43,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:49:43,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:49:43,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:49:43,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:49:43,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:49:43,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:49:43,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:49:43,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:49:43,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:49:43,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:49:43,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:49:43,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:49:43,423 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:49:43,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:49:43,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a077c1334c11d8329da2d0c58ca917b2036581fa7e949d1d304e3346ec54a811 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:49:43,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:49:43,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:49:43,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:49:43,627 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:49:43,627 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:49:43,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2024-09-20 12:49:44,825 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:49:44,985 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:49:44,986 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound5.c [2024-09-20 12:49:44,994 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/dc5fbcc3a/cacff05ac720447889a13e7d5dfabc01/FLAGff96d57aa [2024-09-20 12:49:45,389 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/dc5fbcc3a/cacff05ac720447889a13e7d5dfabc01 [2024-09-20 12:49:45,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:49:45,392 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:49:45,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:49:45,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:49:45,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:49:45,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be815fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45, skipping insertion in model container [2024-09-20 12:49:45,399 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,413 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:49:45,521 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/hard2_valuebound5.c[526,539] [2024-09-20 12:49:45,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:49:45,551 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:49:45,560 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/hard2_valuebound5.c[526,539] [2024-09-20 12:49:45,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:49:45,583 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:49:45,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45 WrapperNode [2024-09-20 12:49:45,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:49:45,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:49:45,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:49:45,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:49:45,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,594 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,603 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:49:45,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:49:45,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:49:45,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:49:45,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:49:45,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,611 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,619 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-20 12:49:45,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,622 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,624 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,625 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,625 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,626 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:49:45,627 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:49:45,627 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:49:45,627 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:49:45,628 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (1/1) ... [2024-09-20 12:49:45,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:49:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:49:45,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 12:49:45,655 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 12:49:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:49:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:49:45,686 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:49:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:49:45,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:49:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:49:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 12:49:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:49:45,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:49:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:49:45,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:49:45,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:49:45,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:49:45,744 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:49:45,746 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:49:45,905 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:49:45,906 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:49:45,925 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:49:45,928 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 12:49:45,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:49:45 BoogieIcfgContainer [2024-09-20 12:49:45,929 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:49:45,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:49:45,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:49:45,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:49:45,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:49:45" (1/3) ... [2024-09-20 12:49:45,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3418b6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:49:45, skipping insertion in model container [2024-09-20 12:49:45,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:49:45" (2/3) ... [2024-09-20 12:49:45,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3418b6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:49:45, skipping insertion in model container [2024-09-20 12:49:45,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:49:45" (3/3) ... [2024-09-20 12:49:45,936 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2024-09-20 12:49:45,948 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:49:45,948 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:49:45,986 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:49:45,991 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;@1ab1e055, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:49:45,991 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:49:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:49:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:49:46,000 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:46,000 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:49:46,000 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:46,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash -909137831, now seen corresponding path program 1 times [2024-09-20 12:49:46,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:46,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692535359] [2024-09-20 12:49:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:46,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:49:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:49:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:49:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692535359] [2024-09-20 12:49:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692535359] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:49:46,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:49:46,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:49:46,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026823084] [2024-09-20 12:49:46,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:49:46,140 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:49:46,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:46,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:49:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:49:46,160 INFO L87 Difference]: Start difference. First operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:49:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:46,183 INFO L93 Difference]: Finished difference Result 58 states and 92 transitions. [2024-09-20 12:49:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:49:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 12:49:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:46,189 INFO L225 Difference]: With dead ends: 58 [2024-09-20 12:49:46,190 INFO L226 Difference]: Without dead ends: 29 [2024-09-20 12:49:46,192 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:49:46,194 INFO L434 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:46,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:49:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-20 12:49:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-20 12:49:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:49:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-09-20 12:49:46,229 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2024-09-20 12:49:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:46,230 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-09-20 12:49:46,230 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:49:46,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-09-20 12:49:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:49:46,244 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:46,244 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:49:46,245 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:49:46,246 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:46,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:46,246 INFO L85 PathProgramCache]: Analyzing trace with hash -229079461, now seen corresponding path program 1 times [2024-09-20 12:49:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619482224] [2024-09-20 12:49:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:49:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:49:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:49:46,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:46,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619482224] [2024-09-20 12:49:46,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619482224] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:49:46,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:49:46,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:49:46,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151871005] [2024-09-20 12:49:46,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:49:46,420 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:49:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:49:46,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:49:46,422 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:49:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:46,478 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-09-20 12:49:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:49:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 12:49:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:46,479 INFO L225 Difference]: With dead ends: 42 [2024-09-20 12:49:46,479 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 12:49:46,480 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:49:46,481 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:46,481 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:49:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 12:49:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-09-20 12:49:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:49:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-20 12:49:46,490 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2024-09-20 12:49:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:46,490 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-20 12:49:46,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:49:46,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-20 12:49:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 12:49:46,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:46,491 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:49:46,491 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:49:46,492 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:46,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash 520476838, now seen corresponding path program 1 times [2024-09-20 12:49:46,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:46,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771841565] [2024-09-20 12:49:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:46,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:49:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:49:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:49:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:49:46,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:46,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771841565] [2024-09-20 12:49:46,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771841565] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:49:46,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:49:46,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:49:46,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296564380] [2024-09-20 12:49:46,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:49:46,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:49:46,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:46,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:49:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:49:46,604 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:49:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:46,657 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-09-20 12:49:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:49:46,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-20 12:49:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:46,659 INFO L225 Difference]: With dead ends: 46 [2024-09-20 12:49:46,659 INFO L226 Difference]: Without dead ends: 44 [2024-09-20 12:49:46,659 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:49:46,660 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:46,660 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:49:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-20 12:49:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-09-20 12:49:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:49:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-20 12:49:46,667 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2024-09-20 12:49:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:46,668 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-20 12:49:46,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:49:46,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-20 12:49:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 12:49:46,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:46,669 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:49:46,669 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:49:46,669 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:46,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1140086011, now seen corresponding path program 1 times [2024-09-20 12:49:46,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:46,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563294456] [2024-09-20 12:49:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:46,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:49:46,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620316957] [2024-09-20 12:49:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:46,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:49:46,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:49:46,700 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:49:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:46,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:49:46,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:49:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:49:46,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:49:46,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:46,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563294456] [2024-09-20 12:49:46,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:49:46,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620316957] [2024-09-20 12:49:46,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620316957] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:49:46,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:49:46,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:49:46,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892235209] [2024-09-20 12:49:46,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:49:46,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:49:46,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:46,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:49:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:49:46,831 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:49:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:46,876 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-09-20 12:49:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:49:46,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-20 12:49:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:46,877 INFO L225 Difference]: With dead ends: 63 [2024-09-20 12:49:46,878 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 12:49:46,878 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:49:46,879 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:46,879 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:49:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 12:49:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-20 12:49:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 12:49:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-20 12:49:46,890 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2024-09-20 12:49:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:46,890 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-20 12:49:46,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:49:46,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-20 12:49:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:49:46,892 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:46,892 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-20 12:49:46,904 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:49:47,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:47,093 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:47,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:47,093 INFO L85 PathProgramCache]: Analyzing trace with hash -975701997, now seen corresponding path program 1 times [2024-09-20 12:49:47,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:47,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136595981] [2024-09-20 12:49:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:47,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:49:47,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538903176] [2024-09-20 12:49:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:47,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:47,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:49:47,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:49:47,116 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:49:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:47,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:49:47,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:49:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:49:47,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:49:47,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:47,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136595981] [2024-09-20 12:49:47,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:49:47,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538903176] [2024-09-20 12:49:47,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538903176] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:49:47,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:49:47,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:49:47,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405999966] [2024-09-20 12:49:47,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:49:47,230 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:49:47,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:49:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:49:47,231 INFO L87 Difference]: Start difference. First operand 50 states and 61 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), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:49:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:47,303 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-09-20 12:49:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:49:47,304 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), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-20 12:49:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:47,305 INFO L225 Difference]: With dead ends: 63 [2024-09-20 12:49:47,306 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 12:49:47,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:49:47,307 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:47,309 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 95 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:49:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 12:49:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-09-20 12:49:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 12:49:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-09-20 12:49:47,320 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 33 [2024-09-20 12:49:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:47,320 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-09-20 12:49:47,320 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), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:49:47,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-09-20 12:49:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 12:49:47,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:47,322 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:49:47,333 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 12:49:47,522 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:47,522 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:47,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:47,523 INFO L85 PathProgramCache]: Analyzing trace with hash -928833564, now seen corresponding path program 1 times [2024-09-20 12:49:47,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:47,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793228490] [2024-09-20 12:49:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:49:47,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787028605] [2024-09-20 12:49:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:47,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:49:47,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:49:47,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:49:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:47,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 12:49:47,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:49:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:49:47,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:49:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-20 12:49:47,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:47,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793228490] [2024-09-20 12:49:47,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:49:47,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787028605] [2024-09-20 12:49:47,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787028605] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:49:47,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:49:47,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-20 12:49:47,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494341253] [2024-09-20 12:49:47,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:49:47,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:49:47,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:49:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:49:47,768 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:49:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:47,826 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-20 12:49:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:49:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-09-20 12:49:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:47,828 INFO L225 Difference]: With dead ends: 70 [2024-09-20 12:49:47,828 INFO L226 Difference]: Without dead ends: 68 [2024-09-20 12:49:47,828 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:49:47,829 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:47,829 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:49:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-20 12:49:47,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-20 12:49:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 12:49:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-09-20 12:49:47,850 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 43 [2024-09-20 12:49:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:47,850 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-09-20 12:49:47,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:49:47,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-09-20 12:49:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 12:49:47,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:47,853 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:49:47,867 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:49:48,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 12:49:48,054 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:48,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash -238148106, now seen corresponding path program 1 times [2024-09-20 12:49:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:48,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19185807] [2024-09-20 12:49:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:48,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:49:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:49:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:49:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:49:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:49:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:49:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:49:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 12:49:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 12:49:48,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:48,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19185807] [2024-09-20 12:49:48,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19185807] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:49:48,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:49:48,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:49:48,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324975226] [2024-09-20 12:49:48,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:49:48,163 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:49:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:49:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:49:48,165 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 12:49:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:48,206 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-09-20 12:49:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:49:48,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-20 12:49:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:48,207 INFO L225 Difference]: With dead ends: 75 [2024-09-20 12:49:48,209 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 12:49:48,209 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:49:48,210 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:48,210 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:49:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 12:49:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 12:49:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 12:49:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-09-20 12:49:48,225 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 49 [2024-09-20 12:49:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:48,226 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-09-20 12:49:48,227 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 12:49:48,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-09-20 12:49:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:49:48,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:48,232 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-09-20 12:49:48,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-20 12:49:48,232 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:48,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:48,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1374799408, now seen corresponding path program 1 times [2024-09-20 12:49:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:48,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936647530] [2024-09-20 12:49:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:48,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:49:48,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780652134] [2024-09-20 12:49:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:48,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:48,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:49:48,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:49:48,265 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:49:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:48,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 12:49:48,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:49:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 12:49:48,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:49:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 12:49:49,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936647530] [2024-09-20 12:49:49,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:49:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780652134] [2024-09-20 12:49:49,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780652134] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:49:49,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:49:49,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-09-20 12:49:49,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843958564] [2024-09-20 12:49:49,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:49:49,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:49:49,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:49,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:49:49,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:49:49,568 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-20 12:49:50,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:50,029 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2024-09-20 12:49:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 12:49:50,029 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 63 [2024-09-20 12:49:50,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:50,031 INFO L225 Difference]: With dead ends: 138 [2024-09-20 12:49:50,031 INFO L226 Difference]: Without dead ends: 115 [2024-09-20 12:49:50,031 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:49:50,032 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:50,032 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 225 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:49:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-20 12:49:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-09-20 12:49:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-20 12:49:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2024-09-20 12:49:50,058 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 63 [2024-09-20 12:49:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:50,058 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2024-09-20 12:49:50,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-20 12:49:50,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2024-09-20 12:49:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 12:49:50,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:50,061 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 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] [2024-09-20 12:49:50,074 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:49:50,265 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:50,266 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:50,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2048390162, now seen corresponding path program 1 times [2024-09-20 12:49:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:50,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008854008] [2024-09-20 12:49:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:49:50,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531393841] [2024-09-20 12:49:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:50,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:50,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:49:50,290 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:49:50,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:49:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:50,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 12:49:50,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:49:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-20 12:49:50,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:49:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-20 12:49:50,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008854008] [2024-09-20 12:49:50,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:49:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531393841] [2024-09-20 12:49:50,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531393841] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:49:50,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:49:50,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-09-20 12:49:50,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40500771] [2024-09-20 12:49:50,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:49:50,927 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 12:49:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:50,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 12:49:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-20 12:49:50,928 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-20 12:49:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:51,454 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2024-09-20 12:49:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 12:49:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 74 [2024-09-20 12:49:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:51,456 INFO L225 Difference]: With dead ends: 168 [2024-09-20 12:49:51,456 INFO L226 Difference]: Without dead ends: 136 [2024-09-20 12:49:51,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:49:51,458 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:51,458 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 195 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:49:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-20 12:49:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2024-09-20 12:49:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 70 states have internal predecessors, (76), 31 states have call successors, (31), 14 states have call predecessors, (31), 13 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-20 12:49:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2024-09-20 12:49:51,491 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 74 [2024-09-20 12:49:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:51,492 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2024-09-20 12:49:51,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-20 12:49:51,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2024-09-20 12:49:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 12:49:51,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:51,493 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1] [2024-09-20 12:49:51,508 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 12:49:51,696 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:51,696 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:51,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1556827571, now seen corresponding path program 1 times [2024-09-20 12:49:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:51,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753265] [2024-09-20 12:49:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:49:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:49:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:49:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:49:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:49:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:49:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:49:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:49:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:49:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:49:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 12:49:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 12:49:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 12:49:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:49:51,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:49:51,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753265] [2024-09-20 12:49:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753265] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:49:51,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361461437] [2024-09-20 12:49:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:51,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:51,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:49:51,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:49:51,944 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:49:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:49:51,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:49:51,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:49:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:49:52,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:49:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:49:52,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361461437] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:49:52,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:49:52,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-20 12:49:52,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340848759] [2024-09-20 12:49:52,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:49:52,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 12:49:52,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:49:52,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 12:49:52,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:49:52,368 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2024-09-20 12:49:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:49:52,503 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2024-09-20 12:49:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 12:49:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 79 [2024-09-20 12:49:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:49:52,505 INFO L225 Difference]: With dead ends: 129 [2024-09-20 12:49:52,505 INFO L226 Difference]: Without dead ends: 100 [2024-09-20 12:49:52,505 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:49:52,505 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:49:52,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 225 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:49:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-20 12:49:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-09-20 12:49:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 63 states have internal predecessors, (67), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-20 12:49:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2024-09-20 12:49:52,521 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 79 [2024-09-20 12:49:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:49:52,522 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2024-09-20 12:49:52,522 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 8 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2024-09-20 12:49:52,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2024-09-20 12:49:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-20 12:49:52,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:49:52,523 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 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] [2024-09-20 12:49:52,535 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 12:49:52,723 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 12:49:52,723 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:49:52,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:49:52,724 INFO L85 PathProgramCache]: Analyzing trace with hash -802122381, now seen corresponding path program 2 times [2024-09-20 12:49:52,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:49:52,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030979160] [2024-09-20 12:49:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:49:52,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:49:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:49:52,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057049971] [2024-09-20 12:49:52,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:49:52,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:49:52,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:49:52,742 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:49:52,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:49:52,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:49:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:49:52,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 12:49:52,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:49:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-20 12:49:53,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:50:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-20 12:50:07,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:50:07,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030979160] [2024-09-20 12:50:07,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:50:07,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057049971] [2024-09-20 12:50:07,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057049971] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:50:07,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:50:07,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2024-09-20 12:50:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839430641] [2024-09-20 12:50:07,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:50:07,697 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 12:50:07,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:50:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 12:50:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-09-20 12:50:07,698 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2024-09-20 12:50:19,974 WARN L293 SmtUtils]: Spent 11.93s on a formula simplification. DAG size of input: 171 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:50:21,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:50:22,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:50:39,496 WARN L293 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 156 DAG size of output: 91 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:50:40,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:50:40,538 INFO L93 Difference]: Finished difference Result 203 states and 265 transitions. [2024-09-20 12:50:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:50:40,539 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 93 [2024-09-20 12:50:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:50:40,540 INFO L225 Difference]: With dead ends: 203 [2024-09-20 12:50:40,540 INFO L226 Difference]: Without dead ends: 170 [2024-09-20 12:50:40,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:50:40,541 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 66 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:50:40,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 513 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-09-20 12:50:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-20 12:50:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2024-09-20 12:50:40,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 98 states have (on average 1.183673469387755) internal successors, (116), 105 states have internal predecessors, (116), 51 states have call successors, (51), 17 states have call predecessors, (51), 16 states have return successors, (49), 43 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-20 12:50:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 216 transitions. [2024-09-20 12:50:40,585 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 216 transitions. Word has length 93 [2024-09-20 12:50:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:50:40,585 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 216 transitions. [2024-09-20 12:50:40,585 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2024-09-20 12:50:40,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 216 transitions. [2024-09-20 12:50:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-20 12:50:40,586 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:50:40,587 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 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] [2024-09-20 12:50:40,599 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 12:50:40,787 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:50:40,787 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:50:40,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:40,787 INFO L85 PathProgramCache]: Analyzing trace with hash 644553835, now seen corresponding path program 2 times [2024-09-20 12:50:40,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:50:40,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159342364] [2024-09-20 12:50:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:50:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:50:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:50:40,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530090838] [2024-09-20 12:50:40,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:50:40,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:50:40,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:50:40,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:50:40,817 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:50:40,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:50:40,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:50:40,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 12:50:40,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:50:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 50 proven. 50 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-20 12:50:41,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:50:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 50 proven. 50 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-20 12:50:44,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:50:44,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159342364] [2024-09-20 12:50:44,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:50:44,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530090838] [2024-09-20 12:50:44,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530090838] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:50:44,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:50:44,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-09-20 12:50:44,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755084663] [2024-09-20 12:50:44,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:50:44,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 12:50:44,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:50:44,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 12:50:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2024-09-20 12:50:44,008 INFO L87 Difference]: Start difference. First operand 166 states and 216 transitions. Second operand has 27 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2024-09-20 12:50:47,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:50:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:50:48,385 INFO L93 Difference]: Finished difference Result 246 states and 327 transitions. [2024-09-20 12:50:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 12:50:48,385 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) Word has length 104 [2024-09-20 12:50:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:50:48,386 INFO L225 Difference]: With dead ends: 246 [2024-09-20 12:50:48,387 INFO L226 Difference]: Without dead ends: 185 [2024-09-20 12:50:48,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 12:50:48,387 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:50:48,388 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 422 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-20 12:50:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-09-20 12:50:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 161. [2024-09-20 12:50:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 103 states have internal predecessors, (112), 47 states have call successors, (47), 18 states have call predecessors, (47), 17 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-20 12:50:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 204 transitions. [2024-09-20 12:50:48,444 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 204 transitions. Word has length 104 [2024-09-20 12:50:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:50:48,445 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 204 transitions. [2024-09-20 12:50:48,445 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2024-09-20 12:50:48,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 204 transitions. [2024-09-20 12:50:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 12:50:48,446 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:50:48,446 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 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] [2024-09-20 12:50:48,458 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 12:50:48,646 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:50:48,647 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:50:48,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:48,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1191181482, now seen corresponding path program 2 times [2024-09-20 12:50:48,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:50:48,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019633583] [2024-09-20 12:50:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:50:48,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:50:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:50:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:50:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:50:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:50:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:50:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:50:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:50:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:50:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:50:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:50:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:50:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:50:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:50:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 12:50:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 12:50:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-20 12:50:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 12:50:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-20 12:50:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 12:50:48,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:50:48,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019633583] [2024-09-20 12:50:48,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019633583] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:50:48,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762237658] [2024-09-20 12:50:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:50:48,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:50:48,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:50:48,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:50:48,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:50:49,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:50:49,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:50:49,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 12:50:49,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:50:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-20 12:50:49,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:50:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-09-20 12:50:50,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762237658] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:50:50,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:50:50,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 25 [2024-09-20 12:50:50,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224501862] [2024-09-20 12:50:50,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:50:50,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 12:50:50,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:50:50,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 12:50:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:50:50,108 INFO L87 Difference]: Start difference. First operand 161 states and 204 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 18 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 18 states have call predecessors, (49), 18 states have call successors, (49) [2024-09-20 12:50:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:50:50,418 INFO L93 Difference]: Finished difference Result 187 states and 231 transitions. [2024-09-20 12:50:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:50:50,418 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 18 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 18 states have call predecessors, (49), 18 states have call successors, (49) Word has length 109 [2024-09-20 12:50:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:50:50,419 INFO L225 Difference]: With dead ends: 187 [2024-09-20 12:50:50,420 INFO L226 Difference]: Without dead ends: 145 [2024-09-20 12:50:50,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:50:50,420 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:50:50,420 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 334 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:50:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-20 12:50:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-09-20 12:50:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 89 states have internal predecessors, (96), 38 states have call successors, (38), 17 states have call predecessors, (38), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-20 12:50:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2024-09-20 12:50:50,470 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 109 [2024-09-20 12:50:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:50:50,471 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2024-09-20 12:50:50,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 18 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 18 states have call predecessors, (49), 18 states have call successors, (49) [2024-09-20 12:50:50,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2024-09-20 12:50:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-20 12:50:50,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:50:50,472 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:50:50,483 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 12:50:50,672 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 [2024-09-20 12:50:50,672 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:50:50,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:50,673 INFO L85 PathProgramCache]: Analyzing trace with hash -626389098, now seen corresponding path program 1 times [2024-09-20 12:50:50,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:50:50,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002753301] [2024-09-20 12:50:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:50:50,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:50:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:50:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:50:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:50:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:50:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:50:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:50:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:50:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:50:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:50:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:50:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:50:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:50:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:50:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-20 12:50:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 12:50:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 12:50:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-20 12:50:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-20 12:50:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 12:50:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 12:50:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-20 12:50:50,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:50:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002753301] [2024-09-20 12:50:50,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002753301] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:50:50,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796246589] [2024-09-20 12:50:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:50:50,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:50:50,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:50:50,850 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:50:50,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:50:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:50,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:50:50,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:50:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-20 12:50:50,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:50:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-20 12:50:51,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796246589] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:50:51,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:50:51,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-09-20 12:50:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786195597] [2024-09-20 12:50:51,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:50:51,075 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:50:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:50:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:50:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:50:51,076 INFO L87 Difference]: Start difference. First operand 139 states and 170 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 9 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 12:50:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:50:51,198 INFO L93 Difference]: Finished difference Result 155 states and 191 transitions. [2024-09-20 12:50:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:50:51,198 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 9 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 121 [2024-09-20 12:50:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:50:51,199 INFO L225 Difference]: With dead ends: 155 [2024-09-20 12:50:51,199 INFO L226 Difference]: Without dead ends: 148 [2024-09-20 12:50:51,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:50:51,200 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:50:51,200 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 185 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:50:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-20 12:50:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2024-09-20 12:50:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 93 states have internal predecessors, (100), 42 states have call successors, (42), 17 states have call predecessors, (42), 16 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-20 12:50:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 182 transitions. [2024-09-20 12:50:51,266 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 182 transitions. Word has length 121 [2024-09-20 12:50:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:50:51,266 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 182 transitions. [2024-09-20 12:50:51,266 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 9 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 12:50:51,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 182 transitions. [2024-09-20 12:50:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-20 12:50:51,268 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:50:51,268 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:50:51,280 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 12:50:51,468 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 [2024-09-20 12:50:51,469 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:50:51,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1967500462, now seen corresponding path program 1 times [2024-09-20 12:50:51,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:50:51,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499294820] [2024-09-20 12:50:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:50:51,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:50:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:50:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:50:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:50:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:50:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:50:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:50:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:50:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:50:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:50:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:50:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:50:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:50:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:50:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-20 12:50:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 12:50:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 12:50:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-20 12:50:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-20 12:50:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 12:50:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 12:50:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2024-09-20 12:50:51,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:50:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499294820] [2024-09-20 12:50:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499294820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:50:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538084812] [2024-09-20 12:50:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:50:51,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:50:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:50:51,633 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:50:51,635 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:50:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:51,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:50:51,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:50:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2024-09-20 12:50:51,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:50:51,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538084812] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:50:51,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:50:51,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2024-09-20 12:50:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856312201] [2024-09-20 12:50:51,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:50:51,775 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:50:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:50:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:50:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:50:51,776 INFO L87 Difference]: Start difference. First operand 147 states and 182 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-20 12:50:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:50:51,921 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2024-09-20 12:50:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:50:51,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 123 [2024-09-20 12:50:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:50:51,923 INFO L225 Difference]: With dead ends: 190 [2024-09-20 12:50:51,923 INFO L226 Difference]: Without dead ends: 147 [2024-09-20 12:50:51,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:50:51,924 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:50:51,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 125 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:50:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-20 12:50:51,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 130. [2024-09-20 12:50:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 83 states have internal predecessors, (88), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-20 12:50:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2024-09-20 12:50:51,975 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 123 [2024-09-20 12:50:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:50:51,975 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2024-09-20 12:50:51,976 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-20 12:50:51,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2024-09-20 12:50:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-20 12:50:51,978 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:50:51,978 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:50:51,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 12:50:52,178 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 [2024-09-20 12:50:52,178 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:50:52,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:52,179 INFO L85 PathProgramCache]: Analyzing trace with hash -478157618, now seen corresponding path program 3 times [2024-09-20 12:50:52,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:50:52,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750040430] [2024-09-20 12:50:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:50:52,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:50:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:50:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:50:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:50:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:50:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:50:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:50:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:50:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:50:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:50:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:50:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:50:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:50:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:50:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-20 12:50:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 12:50:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 12:50:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-20 12:50:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-20 12:50:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 12:50:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 12:50:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-20 12:50:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-20 12:50:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:50:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 52 proven. 45 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-20 12:50:52,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:50:52,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750040430] [2024-09-20 12:50:52,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750040430] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:50:52,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74617788] [2024-09-20 12:50:52,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:50:52,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:50:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:50:52,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:50:52,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:50:52,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:50:52,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:50:52,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:50:52,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:50:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 163 proven. 53 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2024-09-20 12:50:52,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:50:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-09-20 12:50:52,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74617788] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:50:52,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:50:52,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 28 [2024-09-20 12:50:52,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654262714] [2024-09-20 12:50:52,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:50:52,950 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 12:50:52,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:50:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 12:50:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:50:52,951 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 28 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 22 states have internal predecessors, (61), 14 states have call successors, (41), 4 states have call predecessors, (41), 3 states have return successors, (41), 15 states have call predecessors, (41), 12 states have call successors, (41) [2024-09-20 12:50:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:50:53,479 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2024-09-20 12:50:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 12:50:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 22 states have internal predecessors, (61), 14 states have call successors, (41), 4 states have call predecessors, (41), 3 states have return successors, (41), 15 states have call predecessors, (41), 12 states have call successors, (41) Word has length 134 [2024-09-20 12:50:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:50:53,480 INFO L225 Difference]: With dead ends: 188 [2024-09-20 12:50:53,480 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 12:50:53,481 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 12:50:53,482 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 87 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:50:53,482 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 441 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:50:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 12:50:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 12:50:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 12:50:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 12:50:53,482 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2024-09-20 12:50:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:50:53,483 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 12:50:53,483 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 22 states have internal predecessors, (61), 14 states have call successors, (41), 4 states have call predecessors, (41), 3 states have return successors, (41), 15 states have call predecessors, (41), 12 states have call successors, (41) [2024-09-20 12:50:53,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:50:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 12:50:53,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 12:50:53,486 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 12:50:53,498 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 12:50:53,690 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 [2024-09-20 12:50:53,693 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:50:53,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 12:50:55,107 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 12:50:55,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 12:50:55 BoogieIcfgContainer [2024-09-20 12:50:55,121 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 12:50:55,122 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 12:50:55,122 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 12:50:55,122 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 12:50:55,122 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:49:45" (3/4) ... [2024-09-20 12:50:55,123 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 12:50:55,167 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 12:50:55,167 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 12:50:55,168 INFO L158 Benchmark]: Toolchain (without parser) took 69775.53ms. Allocated memory was 140.5MB in the beginning and 325.1MB in the end (delta: 184.5MB). Free memory was 67.8MB in the beginning and 162.6MB in the end (delta: -94.8MB). Peak memory consumption was 92.8MB. Max. memory is 16.1GB. [2024-09-20 12:50:55,168 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 140.5MB. Free memory is still 92.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 12:50:55,168 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.02ms. Allocated memory is still 140.5MB. Free memory was 67.6MB in the beginning and 56.0MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 12:50:55,169 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.35ms. Allocated memory is still 140.5MB. Free memory was 56.0MB in the beginning and 55.0MB in the end (delta: 996.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 12:50:55,169 INFO L158 Benchmark]: Boogie Preprocessor took 23.14ms. Allocated memory is still 140.5MB. Free memory was 55.0MB in the beginning and 53.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 12:50:55,169 INFO L158 Benchmark]: RCFGBuilder took 301.84ms. Allocated memory was 140.5MB in the beginning and 186.6MB in the end (delta: 46.1MB). Free memory was 53.1MB in the beginning and 151.0MB in the end (delta: -97.9MB). Peak memory consumption was 15.3MB. Max. memory is 16.1GB. [2024-09-20 12:50:55,169 INFO L158 Benchmark]: TraceAbstraction took 69191.09ms. Allocated memory was 186.6MB in the beginning and 325.1MB in the end (delta: 138.4MB). Free memory was 150.0MB in the beginning and 164.7MB in the end (delta: -14.8MB). Peak memory consumption was 191.0MB. Max. memory is 16.1GB. [2024-09-20 12:50:55,170 INFO L158 Benchmark]: Witness Printer took 45.51ms. Allocated memory is still 325.1MB. Free memory was 164.7MB in the beginning and 162.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 12:50:55,171 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 140.5MB. Free memory is still 92.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.02ms. Allocated memory is still 140.5MB. Free memory was 67.6MB in the beginning and 56.0MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.35ms. Allocated memory is still 140.5MB. Free memory was 56.0MB in the beginning and 55.0MB in the end (delta: 996.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.14ms. Allocated memory is still 140.5MB. Free memory was 55.0MB in the beginning and 53.1MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 301.84ms. Allocated memory was 140.5MB in the beginning and 186.6MB in the end (delta: 46.1MB). Free memory was 53.1MB in the beginning and 151.0MB in the end (delta: -97.9MB). Peak memory consumption was 15.3MB. Max. memory is 16.1GB. * TraceAbstraction took 69191.09ms. Allocated memory was 186.6MB in the beginning and 325.1MB in the end (delta: 138.4MB). Free memory was 150.0MB in the beginning and 164.7MB in the end (delta: -14.8MB). Peak memory consumption was 191.0MB. Max. memory is 16.1GB. * Witness Printer took 45.51ms. Allocated memory is still 325.1MB. Free memory was 164.7MB in the beginning and 162.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 67.7s, OverallIterations: 16, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 39.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 375 SdHoareTripleChecker+Valid, 11.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 320 mSDsluCounter, 3366 SdHoareTripleChecker+Invalid, 11.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2774 mSDsCounter, 545 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3009 IncrementalHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 545 mSolverCounterUnsat, 592 mSDtfsCounter, 3009 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2133 GetRequests, 1913 SyntacticMatches, 10 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 33.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=11, InterpolantAutomatonStates: 159, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 96 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 23.9s InterpolantComputationTime, 2106 NumberOfCodeBlocks, 2036 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 2460 ConstructedInterpolants, 0 QuantifiedInterpolants, 21831 SizeOfPredicates, 25 NumberOfNonLiveVariables, 2338 ConjunctsInSsa, 295 ConjunctsInUnsatCore, 30 InterpolantComputations, 8 PerfectInterpolantSequences, 10345/10991 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((((((((((((A == r) && (p == 2)) && (d == 2)) && (q == 0)) && (B == 1)) || (((((((A == ((long long) q + r)) && (0 <= A)) && (r <= 1)) && (d == 4)) && (B == 1)) && (p == 4)) && (A <= 5))) || (((((((A == r) && (d == 4)) && (2 <= r)) && (q == 0)) && (B == 1)) && (r <= 3)) && (p == 4))) || (((((((A == ((long long) q + r)) && (0 <= A)) && (r <= 1)) && (p == 2)) && (d == 2)) && (B == 1)) && (A <= 5))) || (((((((A == r) && (p == 8)) && (q == 0)) && (B == 1)) && (d == 8)) && (4 <= r)) && (A <= 5))) || (((((A == ((long long) r + 1)) && (d == 1)) && (B == 1)) && (q == 1)) && (p == 1))) || (((((((A == ((long long) q + r)) && (0 <= A)) && (r <= 5)) && (d == 1)) && (B == 1)) && (A <= 5)) && (p == 1))) || (((((A == r) && (d == 1)) && (q == 0)) && (B == 1)) && (p == 1))) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((0 <= A) && (A == r)) && (r <= 5)) && (d == 1)) && (q == 0)) && (B == 1)) && (p == 1)) || (((((((A == r) && (p == 8)) && (q == 0)) && (B == 1)) && (d == 8)) && (4 <= r)) && (A <= 5))) || (((((((0 <= A) && (A == r)) && (p == 2)) && (d == 2)) && (q == 0)) && (B == 1)) && (A <= 5))) || (((((((A == r) && (d == 4)) && (r <= 5)) && (2 <= r)) && (q == 0)) && (B == 1)) && (p == 4))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-20 12:50:55,238 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE