./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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/dijkstra-u_valuebound10.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74bed2c5921e53f16e234cbc0a2deaaf4b0b51c6cc3f20bfab2fd33a0fce7ecf --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 18:41:41,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 18:41:41,381 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 18:41:41,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 18:41:41,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 18:41:41,408 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 18:41:41,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 18:41:41,409 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 18:41:41,410 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 18:41:41,411 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 18:41:41,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 18:41:41,411 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 18:41:41,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 18:41:41,414 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 18:41:41,414 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 18:41:41,415 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 18:41:41,415 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 18:41:41,415 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 18:41:41,415 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 18:41:41,415 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 18:41:41,416 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 18:41:41,417 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 18:41:41,417 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 18:41:41,417 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 18:41:41,417 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 18:41:41,417 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 18:41:41,418 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 18:41:41,418 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 18:41:41,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 18:41:41,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 18:41:41,418 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 18:41:41,418 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 18:41:41,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 18:41:41,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 18:41:41,419 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 18:41:41,419 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 18:41:41,419 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 18:41:41,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 18:41:41,420 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 18:41:41,420 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 18:41:41,420 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 18:41:41,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 18:41:41,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74bed2c5921e53f16e234cbc0a2deaaf4b0b51c6cc3f20bfab2fd33a0fce7ecf Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2024-09-12 18:41:41,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 18:41:41,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 18:41:41,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 18:41:41,677 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 18:41:41,677 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 18:41:41,678 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c [2024-09-12 18:41:43,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 18:41:43,179 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 18:41:43,181 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound10.c [2024-09-12 18:41:43,189 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/de6666c7a/78fda5f2f48b479faa4bae6479a1865f/FLAG5bd67dee8 [2024-09-12 18:41:43,200 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/de6666c7a/78fda5f2f48b479faa4bae6479a1865f [2024-09-12 18:41:43,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 18:41:43,203 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 18:41:43,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 18:41:43,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 18:41:43,208 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 18:41:43,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96b3e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43, skipping insertion in model container [2024-09-12 18:41:43,209 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,224 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 18:41:43,357 WARN L247 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/dijkstra-u_valuebound10.c[525,538] [2024-09-12 18:41:43,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 18:41:43,398 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 18:41:43,408 WARN L247 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/dijkstra-u_valuebound10.c[525,538] [2024-09-12 18:41:43,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 18:41:43,438 INFO L204 MainTranslator]: Completed translation [2024-09-12 18:41:43,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43 WrapperNode [2024-09-12 18:41:43,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 18:41:43,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 18:41:43,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 18:41:43,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 18:41:43,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,449 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,458 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 18:41:43,460 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 18:41:43,461 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 18:41:43,461 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 18:41:43,461 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 18:41:43,469 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,470 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,486 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 18:41:43,487 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,487 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,497 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,497 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 18:41:43,503 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 18:41:43,503 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 18:41:43,503 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 18:41:43,503 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (1/1) ... [2024-09-12 18:41:43,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 18:41:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:41:43,531 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) [2024-09-12 18:41:43,539 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 [2024-09-12 18:41:43,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 18:41:43,589 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 18:41:43,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 18:41:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 18:41:43,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 18:41:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 18:41:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 18:41:43,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 18:41:43,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 18:41:43,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 18:41:43,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 18:41:43,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 18:41:43,639 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 18:41:43,640 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 18:41:43,819 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 18:41:43,820 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 18:41:43,832 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 18:41:43,832 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 18:41:43,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 06:41:43 BoogieIcfgContainer [2024-09-12 18:41:43,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 18:41:43,834 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 18:41:43,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 18:41:43,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 18:41:43,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 06:41:43" (1/3) ... [2024-09-12 18:41:43,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 06:41:43, skipping insertion in model container [2024-09-12 18:41:43,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:41:43" (2/3) ... [2024-09-12 18:41:43,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 06:41:43, skipping insertion in model container [2024-09-12 18:41:43,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 06:41:43" (3/3) ... [2024-09-12 18:41:43,838 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.c [2024-09-12 18:41:43,850 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 18:41:43,850 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 18:41:43,891 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 18:41:43,898 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;@41228a14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 18:41:43,901 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 18:41:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 18:41:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 18:41:43,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:41:43,910 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:41:43,911 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:41:43,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:43,915 INFO L85 PathProgramCache]: Analyzing trace with hash 570623365, now seen corresponding path program 1 times [2024-09-12 18:41:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:41:43,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144417989] [2024-09-12 18:41:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:41:43,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:41:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:44,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:41:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:44,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:41:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:44,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:41:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:41:44,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:41:44,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144417989] [2024-09-12 18:41:44,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144417989] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:41:44,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:41:44,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 18:41:44,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817117417] [2024-09-12 18:41:44,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:41:44,057 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 18:41:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:41:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 18:41:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 18:41:44,075 INFO L87 Difference]: Start difference. First operand has 36 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 18:41:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:41:44,107 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2024-09-12 18:41:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 18:41:44,109 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-12 18:41:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:41:44,117 INFO L225 Difference]: With dead ends: 66 [2024-09-12 18:41:44,121 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 18:41:44,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 18:41:44,130 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 18:41:44,130 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 18:41:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 18:41:44,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 18:41:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 18:41:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-09-12 18:41:44,166 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 22 [2024-09-12 18:41:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:41:44,167 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-09-12 18:41:44,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 18:41:44,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-09-12 18:41:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 18:41:44,169 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:41:44,169 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:41:44,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 18:41:44,170 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:41:44,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:44,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2095105318, now seen corresponding path program 1 times [2024-09-12 18:41:44,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:41:44,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289169921] [2024-09-12 18:41:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:41:44,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:41:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:44,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:41:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:44,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:41:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:44,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:41:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:41:44,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:41:44,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289169921] [2024-09-12 18:41:44,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289169921] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:41:44,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:41:44,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 18:41:44,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437293209] [2024-09-12 18:41:44,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:41:44,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 18:41:44,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:41:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 18:41:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 18:41:44,743 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 18:41:46,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:41:50,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:41:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:41:50,167 INFO L93 Difference]: Finished difference Result 64 states and 92 transitions. [2024-09-12 18:41:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 18:41:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-09-12 18:41:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:41:50,169 INFO L225 Difference]: With dead ends: 64 [2024-09-12 18:41:50,169 INFO L226 Difference]: Without dead ends: 46 [2024-09-12 18:41:50,169 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 18:41:50,170 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-09-12 18:41:50,170 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 184 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-09-12 18:41:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-12 18:41:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-12 18:41:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 18:41:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2024-09-12 18:41:50,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2024-09-12 18:41:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:41:50,187 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2024-09-12 18:41:50,187 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 18:41:50,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2024-09-12 18:41:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 18:41:50,191 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:41:50,191 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:41:50,191 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 18:41:50,192 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:41:50,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1429886677, now seen corresponding path program 1 times [2024-09-12 18:41:50,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:41:50,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136042643] [2024-09-12 18:41:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:41:50,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:41:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:50,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:41:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:50,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:41:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:50,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:41:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:41:50,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:41:50,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136042643] [2024-09-12 18:41:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136042643] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:41:50,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866660574] [2024-09-12 18:41:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:41:50,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:41:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:41:50,487 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) [2024-09-12 18:41:50,488 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 18:41:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:50,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 18:41:50,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:41:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:41:50,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:41:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:41:50,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866660574] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:41:50,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:41:50,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-09-12 18:41:50,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769720054] [2024-09-12 18:41:50,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:41:50,791 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 18:41:50,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:41:50,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 18:41:50,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-09-12 18:41:50,792 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 18:41:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:41:51,754 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2024-09-12 18:41:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 18:41:51,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-12 18:41:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:41:51,756 INFO L225 Difference]: With dead ends: 115 [2024-09-12 18:41:51,757 INFO L226 Difference]: Without dead ends: 97 [2024-09-12 18:41:51,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-09-12 18:41:51,758 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 18:41:51,758 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 304 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 18:41:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-12 18:41:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2024-09-12 18:41:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 27 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-12 18:41:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2024-09-12 18:41:51,776 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 25 [2024-09-12 18:41:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:41:51,776 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2024-09-12 18:41:51,777 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 18:41:51,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2024-09-12 18:41:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 18:41:51,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:41:51,778 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:41:51,791 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 18:41:51,978 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:41:51,978 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:41:51,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1189191834, now seen corresponding path program 1 times [2024-09-12 18:41:51,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:41:51,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134460188] [2024-09-12 18:41:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:41:51,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:41:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 18:41:51,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938711871] [2024-09-12 18:41:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:41:51,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:41:51,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:41:51,998 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) [2024-09-12 18:41:52,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 18:41:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:52,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 18:41:52,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:41:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 18:41:52,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 18:41:52,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:41:52,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134460188] [2024-09-12 18:41:52,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 18:41:52,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938711871] [2024-09-12 18:41:52,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938711871] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:41:52,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:41:52,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 18:41:52,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294335268] [2024-09-12 18:41:52,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:41:52,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 18:41:52,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:41:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 18:41:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 18:41:52,068 INFO L87 Difference]: Start difference. First operand 65 states and 91 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) [2024-09-12 18:41:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:41:52,229 INFO L93 Difference]: Finished difference Result 90 states and 127 transitions. [2024-09-12 18:41:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 18:41:52,230 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 [2024-09-12 18:41:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:41:52,231 INFO L225 Difference]: With dead ends: 90 [2024-09-12 18:41:52,231 INFO L226 Difference]: Without dead ends: 87 [2024-09-12 18:41:52,231 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 [2024-09-12 18:41:52,232 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:41:52,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 18:41:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-12 18:41:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-12 18:41:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 40 states have (on average 1.2) internal successors, (48), 42 states have internal predecessors, (48), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-12 18:41:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 123 transitions. [2024-09-12 18:41:52,261 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 123 transitions. Word has length 33 [2024-09-12 18:41:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:41:52,262 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 123 transitions. [2024-09-12 18:41:52,262 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) [2024-09-12 18:41:52,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 123 transitions. [2024-09-12 18:41:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 18:41:52,263 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:41:52,263 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:41:52,275 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 18:41:52,468 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:41:52,469 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:41:52,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:41:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1682280212, now seen corresponding path program 1 times [2024-09-12 18:41:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:41:52,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182093910] [2024-09-12 18:41:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:41:52,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:41:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 18:41:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452308931] [2024-09-12 18:41:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:41:52,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:41:52,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:41:52,484 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) [2024-09-12 18:41:52,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 18:41:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:41:52,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 18:41:52,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:41:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:41:52,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:41:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:41:59,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:41:59,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182093910] [2024-09-12 18:41:59,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 18:41:59,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452308931] [2024-09-12 18:41:59,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452308931] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:41:59,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 18:41:59,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-12 18:41:59,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724407726] [2024-09-12 18:41:59,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 18:41:59,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 18:41:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:41:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 18:41:59,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2024-09-12 18:41:59,504 INFO L87 Difference]: Start difference. First operand 87 states and 123 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 18:42:08,505 WARN L293 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 29 DAG size of output: 21 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:42:12,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:13,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:19,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:25,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:27,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:28,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:33,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:37,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:41,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:45,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:49,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:53,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:57,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:01,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:05,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:10,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:12,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:16,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:43:16,771 INFO L93 Difference]: Finished difference Result 156 states and 226 transitions. [2024-09-12 18:43:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 18:43:16,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2024-09-12 18:43:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:43:16,773 INFO L225 Difference]: With dead ends: 156 [2024-09-12 18:43:16,773 INFO L226 Difference]: Without dead ends: 132 [2024-09-12 18:43:16,774 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=38, Invalid=93, Unknown=1, NotChecked=0, Total=132 [2024-09-12 18:43:16,775 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 55 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.2s IncrementalHoareTripleChecker+Time [2024-09-12 18:43:16,775 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 297 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 199 Invalid, 14 Unknown, 0 Unchecked, 68.2s Time] [2024-09-12 18:43:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-12 18:43:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2024-09-12 18:43:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-12 18:43:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2024-09-12 18:43:16,806 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 32 [2024-09-12 18:43:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:43:16,806 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2024-09-12 18:43:16,806 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 18:43:16,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2024-09-12 18:43:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 18:43:16,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:43:16,808 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:43:16,818 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 18:43:17,011 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:43:17,012 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:43:17,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -7962503, now seen corresponding path program 1 times [2024-09-12 18:43:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:43:17,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658791354] [2024-09-12 18:43:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:43:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:17,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:43:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:17,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:43:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:17,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:43:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:17,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 18:43:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:17,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 18:43:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:17,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 18:43:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 18:43:17,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:43:17,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658791354] [2024-09-12 18:43:17,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658791354] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:43:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190178150] [2024-09-12 18:43:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:17,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:43:17,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:43:17,226 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) [2024-09-12 18:43:17,227 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 18:43:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:17,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 18:43:17,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:43:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 18:43:17,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:43:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 18:43:17,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190178150] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:43:17,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:43:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-12 18:43:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529330973] [2024-09-12 18:43:17,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:43:17,500 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 18:43:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:43:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 18:43:17,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-12 18:43:17,501 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-12 18:43:18,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:43:23,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:43:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:43:23,295 INFO L93 Difference]: Finished difference Result 177 states and 252 transitions. [2024-09-12 18:43:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 18:43:23,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 44 [2024-09-12 18:43:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:43:23,297 INFO L225 Difference]: With dead ends: 177 [2024-09-12 18:43:23,297 INFO L226 Difference]: Without dead ends: 135 [2024-09-12 18:43:23,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-09-12 18:43:23,298 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 84 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 180 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-12 18:43:23,298 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 245 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 166 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-09-12 18:43:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-12 18:43:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2024-09-12 18:43:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-12 18:43:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 173 transitions. [2024-09-12 18:43:23,318 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 173 transitions. Word has length 44 [2024-09-12 18:43:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:43:23,318 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 173 transitions. [2024-09-12 18:43:23,318 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-12 18:43:23,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 173 transitions. [2024-09-12 18:43:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 18:43:23,320 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:43:23,320 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:43:23,334 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-12 18:43:23,521 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:43:23,521 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:43:23,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash -409333978, now seen corresponding path program 1 times [2024-09-12 18:43:23,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:43:23,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368403561] [2024-09-12 18:43:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:23,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:43:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 18:43:23,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842773204] [2024-09-12 18:43:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:23,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:43:23,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:43:23,571 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) [2024-09-12 18:43:23,575 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 18:43:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:23,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 18:43:23,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:43:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-12 18:43:23,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:43:35,941 WARN L854 $PredicateComparison]: unable to prove that (or (= (mod (+ (* 4294967295 c_main_~n~0) c_main_~r~0 (* c_main_~p~0 c_main_~p~0)) 4294967296) 0) (forall ((main_~q~0 Int)) (not (= (mod (+ (* main_~q~0 main_~q~0 4294967295 c_main_~h~0) (* 4294967292 main_~q~0 main_~q~0 c_main_~p~0) (* main_~q~0 c_main_~r~0 12 c_main_~h~0) (* main_~q~0 16 c_main_~p~0 c_main_~n~0) (* c_main_~h~0 c_main_~h~0 c_main_~h~0) (* main_~q~0 c_main_~n~0 4294967284 c_main_~h~0) (* main_~q~0 c_main_~p~0 c_main_~r~0 4294967280)) 4294967296) 0)))) is different from false [2024-09-12 18:43:35,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:43:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368403561] [2024-09-12 18:43:35,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 18:43:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842773204] [2024-09-12 18:43:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842773204] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:43:35,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 18:43:35,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 18:43:35,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067395484] [2024-09-12 18:43:35,955 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 18:43:35,955 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 18:43:35,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:43:35,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 18:43:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2024-09-12 18:43:35,956 INFO L87 Difference]: Start difference. First operand 123 states and 173 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 18:43:40,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:43:44,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:48,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:43:52,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:43:56,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:43:56,455 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2024-09-12 18:43:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 18:43:56,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2024-09-12 18:43:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:43:56,459 INFO L225 Difference]: With dead ends: 133 [2024-09-12 18:43:56,459 INFO L226 Difference]: Without dead ends: 111 [2024-09-12 18:43:56,459 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2024-09-12 18:43:56,460 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 13 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2024-09-12 18:43:56,460 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 157 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 149 Invalid, 5 Unknown, 0 Unchecked, 20.5s Time] [2024-09-12 18:43:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-12 18:43:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-09-12 18:43:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 54 states have internal predecessors, (57), 50 states have call successors, (50), 10 states have call predecessors, (50), 9 states have return successors, (47), 46 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-12 18:43:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2024-09-12 18:43:56,481 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 59 [2024-09-12 18:43:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:43:56,481 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2024-09-12 18:43:56,481 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 18:43:56,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2024-09-12 18:43:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 18:43:56,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:43:56,483 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:43:56,508 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 18:43:56,683 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 18:43:56,683 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:43:56,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash 382001091, now seen corresponding path program 1 times [2024-09-12 18:43:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:43:56,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429768459] [2024-09-12 18:43:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:43:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:43:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:43:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:43:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 18:43:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 18:43:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 18:43:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 18:43:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 18:43:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 18:43:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 18:43:57,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:43:57,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429768459] [2024-09-12 18:43:57,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429768459] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:43:57,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743447583] [2024-09-12 18:43:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:57,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:43:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:43:57,319 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) [2024-09-12 18:43:57,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 18:43:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:57,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 18:43:57,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:43:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 18:43:57,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:44:57,478 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 18:45:06,850 WARN L293 SmtUtils]: Spent 9.35s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 18:45:15,284 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-12 18:45:35,597 WARN L293 SmtUtils]: Spent 12.11s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)