./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 418a605fc1323c67278586b967efb51b918569726e40c2a0630b64c1083a6ff9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:12:27,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:12:27,377 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:12:27,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:12:27,383 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:12:27,413 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:12:27,414 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:12:27,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:12:27,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:12:27,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:12:27,418 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:12:27,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:12:27,419 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:12:27,420 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:12:27,420 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:12:27,421 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:12:27,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:12:27,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:12:27,423 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:12:27,423 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:12:27,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:12:27,425 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:12:27,425 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:12:27,426 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:12:27,426 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:12:27,427 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:12:27,427 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:12:27,428 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:12:27,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:12:27,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:12:27,430 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:12:27,430 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:12:27,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:12:27,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:12:27,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:12:27,432 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:12:27,433 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:12:27,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:12:27,434 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:12:27,434 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 418a605fc1323c67278586b967efb51b918569726e40c2a0630b64c1083a6ff9 [2023-11-06 23:12:27,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:12:27,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:12:27,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:12:27,807 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:12:27,807 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:12:27,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2023-11-06 23:12:31,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:12:31,677 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:12:31,678 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2023-11-06 23:12:31,694 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/data/d7df2053f/393f9445d7344556a8b343bd296c2d17/FLAG76df53297 [2023-11-06 23:12:31,716 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/data/d7df2053f/393f9445d7344556a8b343bd296c2d17 [2023-11-06 23:12:31,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:12:31,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:12:31,734 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:12:31,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:12:31,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:12:31,744 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:12:31" (1/1) ... [2023-11-06 23:12:31,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1091911b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:31, skipping insertion in model container [2023-11-06 23:12:31,746 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:12:31" (1/1) ... [2023-11-06 23:12:31,778 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:12:32,019 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2023-11-06 23:12:32,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:12:32,061 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:12:32,080 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i[819,832] [2023-11-06 23:12:32,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:12:32,117 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:12:32,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32 WrapperNode [2023-11-06 23:12:32,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:12:32,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:12:32,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:12:32,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:12:32,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,161 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-11-06 23:12:32,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:12:32,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:12:32,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:12:32,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:12:32,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:12:32,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:12:32,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:12:32,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:12:32,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (1/1) ... [2023-11-06 23:12:32,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:12:32,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:32,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:12:32,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:12:32,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:12:32,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:12:32,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:12:32,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:12:32,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:12:32,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:12:32,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:12:32,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:12:32,388 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:12:32,391 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:12:32,559 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:12:32,566 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:12:32,566 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:12:32,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:12:32 BoogieIcfgContainer [2023-11-06 23:12:32,569 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:12:32,572 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:12:32,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:12:32,576 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:12:32,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:12:31" (1/3) ... [2023-11-06 23:12:32,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad41c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:12:32, skipping insertion in model container [2023-11-06 23:12:32,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:12:32" (2/3) ... [2023-11-06 23:12:32,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad41c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:12:32, skipping insertion in model container [2023-11-06 23:12:32,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:12:32" (3/3) ... [2023-11-06 23:12:32,580 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2023-11-06 23:12:32,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:12:32,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:12:32,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:12:32,672 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@188f8d0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:12:32,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:12:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 23:12:32,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:32,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:32,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:32,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:32,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2023-11-06 23:12:32,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:32,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934574733] [2023-11-06 23:12:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:32,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:12:33,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:33,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934574733] [2023-11-06 23:12:33,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934574733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:33,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:12:33,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:12:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005767036] [2023-11-06 23:12:33,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:33,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:12:33,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:12:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:12:33,053 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:33,093 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2023-11-06 23:12:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:12:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 23:12:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:33,106 INFO L225 Difference]: With dead ends: 36 [2023-11-06 23:12:33,107 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 23:12:33,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:12:33,115 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:33,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:12:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 23:12:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-06 23:12:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-06 23:12:33,158 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2023-11-06 23:12:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:33,159 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-06 23:12:33,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-06 23:12:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 23:12:33,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:33,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:33,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:12:33,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:33,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2023-11-06 23:12:33,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:33,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135155600] [2023-11-06 23:12:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:12:33,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:33,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135155600] [2023-11-06 23:12:33,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135155600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330578896] [2023-11-06 23:12:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:33,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:33,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:33,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:33,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:12:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:33,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:12:33,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:12:33,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:33,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330578896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:33,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:33,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 23:12:33,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438458297] [2023-11-06 23:12:33,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:33,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:12:33,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:12:33,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:12:33,460 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:33,496 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-06 23:12:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:12:33,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 23:12:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:33,500 INFO L225 Difference]: With dead ends: 26 [2023-11-06 23:12:33,500 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 23:12:33,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:12:33,504 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:33,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:12:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 23:12:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-11-06 23:12:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-06 23:12:33,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2023-11-06 23:12:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:33,518 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-06 23:12:33,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-06 23:12:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 23:12:33,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:33,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:33,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:33,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:33,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:33,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2023-11-06 23:12:33,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:33,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689945778] [2023-11-06 23:12:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:12:33,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:33,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689945778] [2023-11-06 23:12:33,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689945778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:33,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746968664] [2023-11-06 23:12:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:33,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:33,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:33,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:12:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:33,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:12:33,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:12:33,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:12:34,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746968664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:34,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:34,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 23:12:34,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826196461] [2023-11-06 23:12:34,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:34,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:12:34,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:12:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:12:34,022 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:34,058 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-11-06 23:12:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:12:34,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 23:12:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:34,060 INFO L225 Difference]: With dead ends: 35 [2023-11-06 23:12:34,060 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 23:12:34,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:12:34,063 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:34,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:12:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 23:12:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 23:12:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-06 23:12:34,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-11-06 23:12:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:34,071 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-06 23:12:34,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-06 23:12:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 23:12:34,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:34,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:34,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:34,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:34,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:34,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:34,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2025336791, now seen corresponding path program 2 times [2023-11-06 23:12:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:34,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422857525] [2023-11-06 23:12:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:34,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:12:34,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:34,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422857525] [2023-11-06 23:12:34,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422857525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699525171] [2023-11-06 23:12:34,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:12:34,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:34,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:34,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:34,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:12:34,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:12:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:34,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:12:34,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:12:34,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:12:34,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699525171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:34,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:34,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-06 23:12:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284422291] [2023-11-06 23:12:34,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:34,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:12:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:34,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:12:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:12:34,798 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:34,911 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-11-06 23:12:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:12:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 23:12:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:34,915 INFO L225 Difference]: With dead ends: 52 [2023-11-06 23:12:34,915 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 23:12:34,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:12:34,922 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:34,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:12:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 23:12:34,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-11-06 23:12:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-06 23:12:34,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 20 [2023-11-06 23:12:34,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:34,949 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-06 23:12:34,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-06 23:12:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 23:12:34,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:34,952 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:34,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 23:12:35,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:35,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:35,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -930592990, now seen corresponding path program 3 times [2023-11-06 23:12:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:35,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983181926] [2023-11-06 23:12:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:12:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983181926] [2023-11-06 23:12:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983181926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399189672] [2023-11-06 23:12:35,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:12:35,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:35,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:35,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:35,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:12:35,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:12:35,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:35,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:12:35,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 23:12:35,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 23:12:36,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399189672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:36,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:36,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-06 23:12:36,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311499271] [2023-11-06 23:12:36,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:36,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:12:36,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:12:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:12:36,016 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:36,153 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2023-11-06 23:12:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:12:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-06 23:12:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:36,162 INFO L225 Difference]: With dead ends: 68 [2023-11-06 23:12:36,163 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 23:12:36,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:12:36,164 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:36,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:12:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 23:12:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-06 23:12:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-11-06 23:12:36,185 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 35 [2023-11-06 23:12:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:36,186 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-11-06 23:12:36,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-11-06 23:12:36,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 23:12:36,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:36,191 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:36,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:36,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:36,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:36,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1920246112, now seen corresponding path program 4 times [2023-11-06 23:12:36,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:36,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669262759] [2023-11-06 23:12:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:36,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-06 23:12:36,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:36,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669262759] [2023-11-06 23:12:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669262759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58175322] [2023-11-06 23:12:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:12:36,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:36,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:36,932 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:36,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:12:37,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:12:37,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:37,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:12:37,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-06 23:12:37,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-06 23:12:37,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58175322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:37,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:37,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-06 23:12:37,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424639208] [2023-11-06 23:12:37,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:37,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:12:37,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:12:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:12:37,548 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:37,673 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2023-11-06 23:12:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:12:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-06 23:12:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:37,676 INFO L225 Difference]: With dead ends: 105 [2023-11-06 23:12:37,676 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 23:12:37,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:12:37,678 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:37,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:12:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 23:12:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-06 23:12:37,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-11-06 23:12:37,689 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 49 [2023-11-06 23:12:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:37,690 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-11-06 23:12:37,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:37,691 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-11-06 23:12:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 23:12:37,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:37,692 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:37,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 23:12:37,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:12:37,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:37,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1287758790, now seen corresponding path program 5 times [2023-11-06 23:12:37,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:37,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57882736] [2023-11-06 23:12:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:37,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-06 23:12:39,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:39,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57882736] [2023-11-06 23:12:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57882736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:39,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452648254] [2023-11-06 23:12:39,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:12:39,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:39,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:39,064 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:39,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:12:39,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-11-06 23:12:39,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:39,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:12:39,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-06 23:12:39,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-06 23:12:41,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452648254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:41,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:41,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-11-06 23:12:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101497919] [2023-11-06 23:12:41,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-06 23:12:41,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-06 23:12:41,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 23:12:41,377 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:41,662 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2023-11-06 23:12:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 23:12:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-06 23:12:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:41,672 INFO L225 Difference]: With dead ends: 157 [2023-11-06 23:12:41,674 INFO L226 Difference]: Without dead ends: 130 [2023-11-06 23:12:41,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 23:12:41,679 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:41,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 107 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:12:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-06 23:12:41,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-11-06 23:12:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.069767441860465) internal successors, (138), 129 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2023-11-06 23:12:41,704 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 75 [2023-11-06 23:12:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:41,705 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2023-11-06 23:12:41,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2023-11-06 23:12:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 23:12:41,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:41,708 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:41,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:41,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:12:41,918 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:41,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:41,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1463270510, now seen corresponding path program 6 times [2023-11-06 23:12:41,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:41,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109279616] [2023-11-06 23:12:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:41,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-06 23:12:45,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:45,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109279616] [2023-11-06 23:12:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109279616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:45,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875601599] [2023-11-06 23:12:45,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:12:45,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:45,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:45,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:12:45,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-06 23:12:45,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:45,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:12:45,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2023-11-06 23:12:46,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2023-11-06 23:12:46,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875601599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:46,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:46,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2023-11-06 23:12:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730025135] [2023-11-06 23:12:46,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:46,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-06 23:12:46,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-06 23:12:46,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 23:12:46,663 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:47,005 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2023-11-06 23:12:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 23:12:47,006 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-11-06 23:12:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:47,008 INFO L225 Difference]: With dead ends: 184 [2023-11-06 23:12:47,008 INFO L226 Difference]: Without dead ends: 157 [2023-11-06 23:12:47,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 23:12:47,012 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:47,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 63 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:12:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-06 23:12:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2023-11-06 23:12:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1096774193548387) internal successors, (172), 155 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2023-11-06 23:12:47,031 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 127 [2023-11-06 23:12:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:47,031 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2023-11-06 23:12:47,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2023-11-06 23:12:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-06 23:12:47,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:47,035 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:47,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:47,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:47,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:47,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:47,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1124380112, now seen corresponding path program 7 times [2023-11-06 23:12:47,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:47,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231839437] [2023-11-06 23:12:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:47,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-06 23:12:50,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:50,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231839437] [2023-11-06 23:12:50,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231839437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:50,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145368887] [2023-11-06 23:12:50,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:12:50,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:50,670 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:50,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:12:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:50,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 23:12:50,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-06 23:12:51,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-06 23:12:56,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145368887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:56,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:56,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-11-06 23:12:56,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89202564] [2023-11-06 23:12:56,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:56,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-06 23:12:56,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-06 23:12:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-11-06 23:12:56,198 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:56,731 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2023-11-06 23:12:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-06 23:12:56,732 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2023-11-06 23:12:56,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:56,736 INFO L225 Difference]: With dead ends: 313 [2023-11-06 23:12:56,736 INFO L226 Difference]: Without dead ends: 262 [2023-11-06 23:12:56,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-11-06 23:12:56,746 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:56,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:12:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-06 23:12:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2023-11-06 23:12:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0651340996168583) internal successors, (278), 261 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 278 transitions. [2023-11-06 23:12:56,791 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 278 transitions. Word has length 153 [2023-11-06 23:12:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:56,793 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 278 transitions. [2023-11-06 23:12:56,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 278 transitions. [2023-11-06 23:12:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-06 23:12:56,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:56,809 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:56,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:57,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:57,018 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:57,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:57,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2002911398, now seen corresponding path program 8 times [2023-11-06 23:12:57,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:57,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236157328] [2023-11-06 23:12:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:57,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-06 23:13:08,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:08,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236157328] [2023-11-06 23:13:08,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236157328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:13:08,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701817932] [2023-11-06 23:13:08,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:13:08,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:08,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:08,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:08,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:13:08,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:13:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:13:08,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-06 23:13:08,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-06 23:13:09,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-06 23:13:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701817932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:13:24,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:13:24,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2023-11-06 23:13:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441852956] [2023-11-06 23:13:24,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:13:24,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2023-11-06 23:13:24,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2023-11-06 23:13:24,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-11-06 23:13:24,102 INFO L87 Difference]: Start difference. First operand 262 states and 278 transitions. Second operand has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:25,306 INFO L93 Difference]: Finished difference Result 525 states and 662 transitions. [2023-11-06 23:13:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-11-06 23:13:25,307 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2023-11-06 23:13:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:25,310 INFO L225 Difference]: With dead ends: 525 [2023-11-06 23:13:25,311 INFO L226 Difference]: Without dead ends: 474 [2023-11-06 23:13:25,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-11-06 23:13:25,316 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:25,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 94 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:13:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-06 23:13:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2023-11-06 23:13:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.0359408033826638) internal successors, (490), 473 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 490 transitions. [2023-11-06 23:13:25,335 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 490 transitions. Word has length 259 [2023-11-06 23:13:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:25,336 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 490 transitions. [2023-11-06 23:13:25,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 490 transitions. [2023-11-06 23:13:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-06 23:13:25,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:25,347 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:25,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:25,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:25,554 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:25,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:25,555 INFO L85 PathProgramCache]: Analyzing trace with hash -523881518, now seen corresponding path program 9 times [2023-11-06 23:13:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:25,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981368504] [2023-11-06 23:13:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:25,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-11-06 23:13:56,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:56,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981368504] [2023-11-06 23:13:56,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981368504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:13:56,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745092417] [2023-11-06 23:13:56,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:13:56,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:56,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:56,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:56,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:13:57,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-06 23:13:57,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:13:57,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:13:57,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2023-11-06 23:13:58,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2023-11-06 23:14:00,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745092417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:00,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:14:00,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2023-11-06 23:14:00,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244919516] [2023-11-06 23:14:00,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:00,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2023-11-06 23:14:00,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:14:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2023-11-06 23:14:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2023-11-06 23:14:00,415 INFO L87 Difference]: Start difference. First operand 474 states and 490 transitions. Second operand has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:14:02,319 INFO L93 Difference]: Finished difference Result 576 states and 640 transitions. [2023-11-06 23:14:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2023-11-06 23:14:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 471 [2023-11-06 23:14:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:14:02,331 INFO L225 Difference]: With dead ends: 576 [2023-11-06 23:14:02,331 INFO L226 Difference]: Without dead ends: 525 [2023-11-06 23:14:02,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1153 GetRequests, 912 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6300 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2023-11-06 23:14:02,337 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:14:02,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 146 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:14:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2023-11-06 23:14:02,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 524. [2023-11-06 23:14:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.0630975143403443) internal successors, (556), 523 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 556 transitions. [2023-11-06 23:14:02,360 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 556 transitions. Word has length 471 [2023-11-06 23:14:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:14:02,362 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 556 transitions. [2023-11-06 23:14:02,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 556 transitions. [2023-11-06 23:14:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2023-11-06 23:14:02,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:14:02,377 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:14:02,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:14:02,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:02,593 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:14:02,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash 968252304, now seen corresponding path program 10 times [2023-11-06 23:14:02,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:14:02,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867901038] [2023-11-06 23:14:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:02,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:14:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2023-11-06 23:14:35,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:14:35,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867901038] [2023-11-06 23:14:35,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867901038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:14:35,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661482600] [2023-11-06 23:14:35,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:14:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:14:35,609 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:14:35,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:14:36,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:14:36,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:14:36,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 2188 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 23:14:36,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 44521 trivial. 0 not checked. [2023-11-06 23:14:39,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 44521 trivial. 0 not checked. [2023-11-06 23:14:43,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661482600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:43,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:14:43,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 33, 33] total 276 [2023-11-06 23:14:43,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714034462] [2023-11-06 23:14:43,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:43,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 276 states [2023-11-06 23:14:43,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:14:43,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 276 interpolants. [2023-11-06 23:14:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24806, Invalid=51094, Unknown=0, NotChecked=0, Total=75900 [2023-11-06 23:14:43,843 INFO L87 Difference]: Start difference. First operand 524 states and 556 transitions. Second operand has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:14:46,398 INFO L93 Difference]: Finished difference Result 722 states and 850 transitions. [2023-11-06 23:14:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2023-11-06 23:14:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 521 [2023-11-06 23:14:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:14:46,404 INFO L225 Difference]: With dead ends: 722 [2023-11-06 23:14:46,404 INFO L226 Difference]: Without dead ends: 623 [2023-11-06 23:14:46,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13082 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=24806, Invalid=51094, Unknown=0, NotChecked=0, Total=75900 [2023-11-06 23:14:46,411 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 217 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:14:46,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 218 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:14:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2023-11-06 23:14:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 622. [2023-11-06 23:14:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.104669887278583) internal successors, (686), 621 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 686 transitions. [2023-11-06 23:14:46,454 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 686 transitions. Word has length 521 [2023-11-06 23:14:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:14:46,455 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 686 transitions. [2023-11-06 23:14:46,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:14:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 686 transitions. [2023-11-06 23:14:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-11-06 23:14:46,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:14:46,462 INFO L195 NwaCegarLoop]: trace histogram [212, 212, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:14:46,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:14:46,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:46,672 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:14:46,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1096007374, now seen corresponding path program 11 times [2023-11-06 23:14:46,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:14:46,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977559276] [2023-11-06 23:14:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:46,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:14:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 50679 backedges. 0 proven. 44944 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2023-11-06 23:15:20,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:15:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977559276] [2023-11-06 23:15:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977559276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:15:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578086920] [2023-11-06 23:15:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:15:20,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:15:20,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:15:20,797 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:15:20,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ab1c9da-1d16-4bd0-8760-cd70ee5ece07/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process