./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep20-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:14:03,944 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:14:04,057 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 16:14:04,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:14:04,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:14:04,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:14:04,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:14:04,100 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:14:04,101 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:14:04,101 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:14:04,101 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:14:04,101 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:14:04,102 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:14:04,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:14:04,102 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:14:04,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:14:04,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 16:14:04,103 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:14:04,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:14:04,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:14:04,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:14:04,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 16:14:04,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:14:04,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 16:14:04,104 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:14:04,104 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:14:04,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 16:14:04,105 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:14:04,105 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:14:04,105 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:14:04,105 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:14:04,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:14:04,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:14:04,106 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:14:04,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:14:04,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 16:14:04,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:14:04,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:14:04,107 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:14:04,107 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:14:04,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:14:04,107 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:14:04,107 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2024-11-13 16:14:04,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:14:04,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:14:04,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:14:04,538 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:14:04,538 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:14:04,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/reducercommutativity/sep20-1.i Unable to find full path for "g++" [2024-11-13 16:14:06,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:14:07,036 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:14:07,037 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/sv-benchmarks/c/reducercommutativity/sep20-1.i [2024-11-13 16:14:07,047 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/data/84aab687d/4161d272455142cd85d73c60c53013e7/FLAG29f47732c [2024-11-13 16:14:07,065 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/data/84aab687d/4161d272455142cd85d73c60c53013e7 [2024-11-13 16:14:07,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:14:07,070 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:14:07,072 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:14:07,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:14:07,078 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:14:07,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ecac5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07, skipping insertion in model container [2024-11-13 16:14:07,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,106 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:14:07,362 WARN L250 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_36f35c14-e8e8-4f21-a8ad-c45d71353916/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2024-11-13 16:14:07,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:14:07,377 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:14:07,416 WARN L250 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_36f35c14-e8e8-4f21-a8ad-c45d71353916/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2024-11-13 16:14:07,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:14:07,437 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:14:07,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07 WrapperNode [2024-11-13 16:14:07,439 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:14:07,440 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:14:07,441 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:14:07,441 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:14:07,450 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,458 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,485 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-13 16:14:07,487 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:14:07,487 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:14:07,488 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:14:07,488 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:14:07,499 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,503 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,531 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-11-13 16:14:07,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,559 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,566 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:14:07,567 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:14:07,567 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:14:07,567 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:14:07,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (1/1) ... [2024-11-13 16:14:07,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:14:07,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:07,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:14:07,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:14:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:14:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:14:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:14:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 16:14:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:14:07,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:14:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:14:07,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:14:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:14:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:14:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 16:14:07,667 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2024-11-13 16:14:07,668 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2024-11-13 16:14:07,768 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:14:07,770 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:14:08,048 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-13 16:14:08,048 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:14:08,066 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:14:08,066 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 16:14:08,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:14:08 BoogieIcfgContainer [2024-11-13 16:14:08,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:14:08,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:14:08,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:14:08,081 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:14:08,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:14:07" (1/3) ... [2024-11-13 16:14:08,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3874942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:14:08, skipping insertion in model container [2024-11-13 16:14:08,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:14:07" (2/3) ... [2024-11-13 16:14:08,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3874942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:14:08, skipping insertion in model container [2024-11-13 16:14:08,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:14:08" (3/3) ... [2024-11-13 16:14:08,085 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2024-11-13 16:14:08,107 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:14:08,113 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sep20-1.i that has 2 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 16:14:08,194 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:14:08,216 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3530b2c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:14:08,218 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 16:14:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:08,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 16:14:08,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:08,236 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:08,236 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:08,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1805656490, now seen corresponding path program 1 times [2024-11-13 16:14:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:08,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634399126] [2024-11-13 16:14:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:08,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-13 16:14:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:08,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:14:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:08,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 16:14:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:14:08,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:08,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634399126] [2024-11-13 16:14:08,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634399126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:08,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577898913] [2024-11-13 16:14:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:08,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:08,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:08,704 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:08,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:14:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:08,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 16:14:08,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:14:08,944 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:14:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577898913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:14:08,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:14:08,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-13 16:14:08,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412355178] [2024-11-13 16:14:08,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:14:08,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:14:08,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:14:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:14:08,989 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 16:14:09,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:09,035 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2024-11-13 16:14:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:14:09,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-11-13 16:14:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:09,048 INFO L225 Difference]: With dead ends: 50 [2024-11-13 16:14:09,048 INFO L226 Difference]: Without dead ends: 23 [2024-11-13 16:14:09,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:14:09,056 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:09,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-13 16:14:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-13 16:14:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-11-13 16:14:09,110 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 29 [2024-11-13 16:14:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:09,112 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-11-13 16:14:09,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 16:14:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-11-13 16:14:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 16:14:09,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:09,115 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:09,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 16:14:09,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-13 16:14:09,317 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:09,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2117861646, now seen corresponding path program 1 times [2024-11-13 16:14:09,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:09,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254015345] [2024-11-13 16:14:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:09,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:09,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 16:14:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:09,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:14:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:09,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 16:14:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:14:09,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254015345] [2024-11-13 16:14:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254015345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031981683] [2024-11-13 16:14:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:09,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:09,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:09,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:09,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:14:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:09,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 16:14:09,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:14:09,813 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:14:09,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031981683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:14:09,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:14:09,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-13 16:14:09,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332088645] [2024-11-13 16:14:09,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:14:09,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:14:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:14:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:14:09,819 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 16:14:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:09,851 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2024-11-13 16:14:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:14:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-13 16:14:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:09,853 INFO L225 Difference]: With dead ends: 43 [2024-11-13 16:14:09,854 INFO L226 Difference]: Without dead ends: 26 [2024-11-13 16:14:09,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:14:09,857 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:09,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-13 16:14:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-13 16:14:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-11-13 16:14:09,871 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 30 [2024-11-13 16:14:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:09,871 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-11-13 16:14:09,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 16:14:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-11-13 16:14:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 16:14:09,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:09,875 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:09,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 16:14:10,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:10,076 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:10,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -42857101, now seen corresponding path program 1 times [2024-11-13 16:14:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:10,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793505842] [2024-11-13 16:14:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:10,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 16:14:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:10,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-13 16:14:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:10,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-13 16:14:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:14:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:10,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793505842] [2024-11-13 16:14:10,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793505842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:10,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392388418] [2024-11-13 16:14:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:10,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:10,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:10,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:10,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:14:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:10,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 16:14:10,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:14:10,544 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:14:10,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392388418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:14:10,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:14:10,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-13 16:14:10,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632656107] [2024-11-13 16:14:10,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:14:10,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:14:10,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:10,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:14:10,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:14:10,546 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 16:14:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:10,562 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2024-11-13 16:14:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:14:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-13 16:14:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:10,564 INFO L225 Difference]: With dead ends: 39 [2024-11-13 16:14:10,564 INFO L226 Difference]: Without dead ends: 25 [2024-11-13 16:14:10,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:14:10,565 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:10,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-13 16:14:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-13 16:14:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-13 16:14:10,571 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 39 [2024-11-13 16:14:10,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:10,573 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-13 16:14:10,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 16:14:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-13 16:14:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 16:14:10,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:10,574 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:10,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 16:14:10,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:10,778 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:10,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1251863669, now seen corresponding path program 1 times [2024-11-13 16:14:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:10,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104500581] [2024-11-13 16:14:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:10,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:10,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 16:14:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:10,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-13 16:14:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:10,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-13 16:14:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:14:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104500581] [2024-11-13 16:14:11,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104500581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:11,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618543829] [2024-11-13 16:14:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:11,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:11,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:11,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:11,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 16:14:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:11,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 16:14:11,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:14:11,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:14:11,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618543829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:11,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:11,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2024-11-13 16:14:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933374953] [2024-11-13 16:14:11,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:11,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:14:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:14:11,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:14:11,299 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 16:14:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:11,359 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-11-13 16:14:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:14:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-11-13 16:14:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:11,361 INFO L225 Difference]: With dead ends: 54 [2024-11-13 16:14:11,361 INFO L226 Difference]: Without dead ends: 33 [2024-11-13 16:14:11,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:14:11,364 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:11,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 89 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-13 16:14:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-13 16:14:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-13 16:14:11,378 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 40 [2024-11-13 16:14:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:11,379 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-13 16:14:11,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 16:14:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-13 16:14:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 16:14:11,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:11,380 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:11,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 16:14:11,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:11,587 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:11,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash -248545006, now seen corresponding path program 2 times [2024-11-13 16:14:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:11,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582545894] [2024-11-13 16:14:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:11,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:11,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 16:14:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:11,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 16:14:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:11,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:14:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-13 16:14:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582545894] [2024-11-13 16:14:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582545894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031518200] [2024-11-13 16:14:11,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:14:11,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:11,763 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:11,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 16:14:11,915 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:14:11,916 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:11,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 16:14:11,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-13 16:14:12,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-13 16:14:12,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031518200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:12,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:12,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-13 16:14:12,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798603946] [2024-11-13 16:14:12,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:12,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 16:14:12,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:12,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 16:14:12,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-13 16:14:12,145 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 16:14:12,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:12,209 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2024-11-13 16:14:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 16:14:12,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2024-11-13 16:14:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:12,213 INFO L225 Difference]: With dead ends: 62 [2024-11-13 16:14:12,213 INFO L226 Difference]: Without dead ends: 38 [2024-11-13 16:14:12,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-13 16:14:12,215 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:12,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-13 16:14:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-13 16:14:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-11-13 16:14:12,229 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 52 [2024-11-13 16:14:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:12,229 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-11-13 16:14:12,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 16:14:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-11-13 16:14:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 16:14:12,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:12,231 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:12,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 16:14:12,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:12,432 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:12,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1627044470, now seen corresponding path program 3 times [2024-11-13 16:14:12,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:12,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555740774] [2024-11-13 16:14:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:12,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:12,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-13 16:14:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:13,013 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-13 16:14:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:13,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-13 16:14:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-13 16:14:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555740774] [2024-11-13 16:14:13,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555740774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381727533] [2024-11-13 16:14:13,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:14:13,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:13,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:13,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:13,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 16:14:13,212 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 16:14:13,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:13,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 16:14:13,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 16:14:13,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 16:14:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381727533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:13,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:13,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2024-11-13 16:14:13,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427332744] [2024-11-13 16:14:13,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:13,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 16:14:13,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:13,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 16:14:13,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:14:13,444 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:14:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:13,556 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2024-11-13 16:14:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 16:14:13,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2024-11-13 16:14:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:13,563 INFO L225 Difference]: With dead ends: 76 [2024-11-13 16:14:13,563 INFO L226 Difference]: Without dead ends: 51 [2024-11-13 16:14:13,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:14:13,567 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:13,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:14:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-13 16:14:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-13 16:14:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-13 16:14:13,586 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 59 [2024-11-13 16:14:13,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:13,586 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-13 16:14:13,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:14:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-13 16:14:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-13 16:14:13,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:13,594 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:13,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 16:14:13,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:13,801 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:13,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash 101923410, now seen corresponding path program 4 times [2024-11-13 16:14:13,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:13,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479185000] [2024-11-13 16:14:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:13,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:14,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-13 16:14:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:14,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-13 16:14:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:14,694 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-11-13 16:14:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2024-11-13 16:14:14,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:14,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479185000] [2024-11-13 16:14:14,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479185000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:14,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796529874] [2024-11-13 16:14:14,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:14:14,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:14,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:14,734 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:14,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 16:14:14,985 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:14:14,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:14,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 16:14:14,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-11-13 16:14:15,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2024-11-13 16:14:15,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796529874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:15,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:15,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2024-11-13 16:14:15,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688336854] [2024-11-13 16:14:15,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:15,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 16:14:15,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 16:14:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2024-11-13 16:14:15,485 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:14:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:15,620 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2024-11-13 16:14:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 16:14:15,622 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 96 [2024-11-13 16:14:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:15,623 INFO L225 Difference]: With dead ends: 113 [2024-11-13 16:14:15,623 INFO L226 Difference]: Without dead ends: 76 [2024-11-13 16:14:15,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2024-11-13 16:14:15,628 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:15,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 170 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:14:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-13 16:14:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-13 16:14:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2024-11-13 16:14:15,651 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 96 [2024-11-13 16:14:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:15,653 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2024-11-13 16:14:15,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:14:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2024-11-13 16:14:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-13 16:14:15,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:15,661 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 42, 12, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:15,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 16:14:15,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:15,862 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:15,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1097789622, now seen corresponding path program 5 times [2024-11-13 16:14:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:15,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156236821] [2024-11-13 16:14:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:15,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:16,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 16:14:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:16,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 16:14:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:16,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-11-13 16:14:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 2727 trivial. 0 not checked. [2024-11-13 16:14:16,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156236821] [2024-11-13 16:14:16,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156236821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485919195] [2024-11-13 16:14:16,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:14:16,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:16,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:16,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 16:14:17,580 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2024-11-13 16:14:17,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:17,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:14:17,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2024-11-13 16:14:18,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2024-11-13 16:14:18,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485919195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:18,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:18,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 35 [2024-11-13 16:14:18,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185122453] [2024-11-13 16:14:18,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:18,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 16:14:18,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 16:14:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 16:14:18,679 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:14:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:18,847 INFO L93 Difference]: Finished difference Result 156 states and 207 transitions. [2024-11-13 16:14:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 16:14:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 169 [2024-11-13 16:14:18,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:18,849 INFO L225 Difference]: With dead ends: 156 [2024-11-13 16:14:18,849 INFO L226 Difference]: Without dead ends: 95 [2024-11-13 16:14:18,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 314 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 16:14:18,851 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:18,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 182 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:14:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-13 16:14:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-13 16:14:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 90 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2024-11-13 16:14:18,863 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 169 [2024-11-13 16:14:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:18,864 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2024-11-13 16:14:18,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:14:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2024-11-13 16:14:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-13 16:14:18,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:18,871 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 60, 13, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:18,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 16:14:19,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:19,073 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:19,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1225756750, now seen corresponding path program 6 times [2024-11-13 16:14:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:19,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220276982] [2024-11-13 16:14:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:19,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:20,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:14:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:20,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-11-13 16:14:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:20,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2024-11-13 16:14:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5599 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 5508 trivial. 0 not checked. [2024-11-13 16:14:20,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:20,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220276982] [2024-11-13 16:14:20,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220276982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:20,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613407479] [2024-11-13 16:14:20,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:14:20,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:20,344 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:20,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 16:14:20,552 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 16:14:20,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:20,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 16:14:20,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5599 backedges. 2490 proven. 3 refuted. 0 times theorem prover too weak. 3106 trivial. 0 not checked. [2024-11-13 16:14:20,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5599 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5596 trivial. 0 not checked. [2024-11-13 16:14:20,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613407479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:20,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:20,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 22 [2024-11-13 16:14:20,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466968719] [2024-11-13 16:14:20,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:20,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 16:14:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 16:14:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:14:20,752 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:14:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:20,820 INFO L93 Difference]: Finished difference Result 179 states and 231 transitions. [2024-11-13 16:14:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 16:14:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 224 [2024-11-13 16:14:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:20,823 INFO L225 Difference]: With dead ends: 179 [2024-11-13 16:14:20,823 INFO L226 Difference]: Without dead ends: 100 [2024-11-13 16:14:20,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:14:20,825 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:20,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-13 16:14:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-13 16:14:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2024-11-13 16:14:20,838 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 224 [2024-11-13 16:14:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:20,838 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2024-11-13 16:14:20,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:14:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2024-11-13 16:14:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-13 16:14:20,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:20,843 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 60, 14, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:20,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 16:14:21,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:21,043 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:21,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1883840662, now seen corresponding path program 7 times [2024-11-13 16:14:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:21,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575769520] [2024-11-13 16:14:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:21,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:22,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:14:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:22,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-11-13 16:14:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:22,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-11-13 16:14:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5631 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 5526 trivial. 0 not checked. [2024-11-13 16:14:22,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575769520] [2024-11-13 16:14:22,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575769520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:22,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163523423] [2024-11-13 16:14:22,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:14:22,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:22,398 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:22,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 16:14:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:22,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:14:22,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5631 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 5526 trivial. 0 not checked. [2024-11-13 16:14:22,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5631 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 5526 trivial. 0 not checked. [2024-11-13 16:14:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163523423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:23,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:23,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2024-11-13 16:14:23,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618119888] [2024-11-13 16:14:23,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:23,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 16:14:23,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 16:14:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:14:23,253 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 16:14:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:23,301 INFO L93 Difference]: Finished difference Result 189 states and 242 transitions. [2024-11-13 16:14:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 16:14:23,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2024-11-13 16:14:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:23,304 INFO L225 Difference]: With dead ends: 189 [2024-11-13 16:14:23,308 INFO L226 Difference]: Without dead ends: 106 [2024-11-13 16:14:23,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 448 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:14:23,309 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:23,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-13 16:14:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-13 16:14:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.2277227722772277) internal successors, (124), 101 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2024-11-13 16:14:23,331 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 229 [2024-11-13 16:14:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:23,331 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2024-11-13 16:14:23,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 16:14:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2024-11-13 16:14:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2024-11-13 16:14:23,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:23,335 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:23,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 16:14:23,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:23,539 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:23,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1906981654, now seen corresponding path program 8 times [2024-11-13 16:14:23,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:23,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294378363] [2024-11-13 16:14:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:23,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:24,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:14:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:24,297 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-13 16:14:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:24,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2024-11-13 16:14:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5715 trivial. 0 not checked. [2024-11-13 16:14:24,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:24,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294378363] [2024-11-13 16:14:24,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294378363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:24,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318686796] [2024-11-13 16:14:24,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:14:24,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:24,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:24,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:24,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 16:14:24,820 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:14:24,820 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:24,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 16:14:24,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 2490 proven. 21 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2024-11-13 16:14:24,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5715 trivial. 0 not checked. [2024-11-13 16:14:25,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318686796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:25,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:25,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-13 16:14:25,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115980045] [2024-11-13 16:14:25,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:25,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 16:14:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 16:14:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:14:25,059 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:14:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:25,099 INFO L93 Difference]: Finished difference Result 185 states and 237 transitions. [2024-11-13 16:14:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 16:14:25,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 235 [2024-11-13 16:14:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:25,102 INFO L225 Difference]: With dead ends: 185 [2024-11-13 16:14:25,102 INFO L226 Difference]: Without dead ends: 114 [2024-11-13 16:14:25,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:14:25,103 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:25,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-13 16:14:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-13 16:14:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 109 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2024-11-13 16:14:25,125 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 138 transitions. Word has length 235 [2024-11-13 16:14:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:25,127 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 138 transitions. [2024-11-13 16:14:25,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:14:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 138 transitions. [2024-11-13 16:14:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-11-13 16:14:25,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:25,131 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:25,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 16:14:25,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 16:14:25,336 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:25,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 911198486, now seen corresponding path program 9 times [2024-11-13 16:14:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:25,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589982106] [2024-11-13 16:14:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:26,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:14:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:26,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-13 16:14:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:26,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2024-11-13 16:14:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5820 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 5715 trivial. 0 not checked. [2024-11-13 16:14:26,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:26,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589982106] [2024-11-13 16:14:26,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589982106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:26,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213559704] [2024-11-13 16:14:26,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:14:26,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:26,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:26,541 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:26,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 16:14:28,509 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-13 16:14:28,510 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:28,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 16:14:28,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5820 backedges. 2490 proven. 105 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2024-11-13 16:14:28,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5820 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 5715 trivial. 0 not checked. [2024-11-13 16:14:28,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213559704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:28,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:28,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2024-11-13 16:14:28,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722700241] [2024-11-13 16:14:28,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:28,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 16:14:28,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 16:14:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:14:28,977 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:14:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:14:29,046 INFO L93 Difference]: Finished difference Result 190 states and 239 transitions. [2024-11-13 16:14:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 16:14:29,050 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 243 [2024-11-13 16:14:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:14:29,053 INFO L225 Difference]: With dead ends: 190 [2024-11-13 16:14:29,054 INFO L226 Difference]: Without dead ends: 119 [2024-11-13 16:14:29,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 476 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:14:29,056 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:14:29,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 158 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:14:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-13 16:14:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-13 16:14:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 114 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:14:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2024-11-13 16:14:29,079 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 243 [2024-11-13 16:14:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:14:29,079 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2024-11-13 16:14:29,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:14:29,080 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2024-11-13 16:14:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-13 16:14:29,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:14:29,087 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:14:29,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 16:14:29,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 16:14:29,288 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:14:29,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:14:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2033107890, now seen corresponding path program 10 times [2024-11-13 16:14:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:14:29,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725138607] [2024-11-13 16:14:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:14:29,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:14:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:42,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:14:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:43,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-13 16:14:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:44,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-11-13 16:14:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:14:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 116 proven. 5425 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-11-13 16:14:48,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:14:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725138607] [2024-11-13 16:14:48,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725138607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:14:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172468618] [2024-11-13 16:14:48,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:14:48,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:14:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:14:48,220 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:14:48,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 16:14:48,824 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:14:48,824 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:14:48,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 307 conjuncts are in the unsatisfiable core [2024-11-13 16:14:48,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:14:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2024-11-13 16:14:52,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:14:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2024-11-13 16:14:57,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172468618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:14:57,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:14:57,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 70, 30] total 132 [2024-11-13 16:14:57,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724772508] [2024-11-13 16:14:57,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:14:57,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2024-11-13 16:14:57,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:14:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2024-11-13 16:14:57,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=16836, Unknown=0, NotChecked=0, Total=17292 [2024-11-13 16:14:57,574 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand has 132 states, 130 states have (on average 2.169230769230769) internal successors, (282), 126 states have internal predecessors, (282), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-13 16:15:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:15:03,824 INFO L93 Difference]: Finished difference Result 756 states and 995 transitions. [2024-11-13 16:15:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-13 16:15:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 130 states have (on average 2.169230769230769) internal successors, (282), 126 states have internal predecessors, (282), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 248 [2024-11-13 16:15:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:15:03,838 INFO L225 Difference]: With dead ends: 756 [2024-11-13 16:15:03,838 INFO L226 Difference]: Without dead ends: 752 [2024-11-13 16:15:03,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8348 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=636, Invalid=25124, Unknown=0, NotChecked=0, Total=25760 [2024-11-13 16:15:03,846 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 2047 mSDsCounter, 0 mSdLazyCounter, 8291 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 8381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 8291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:15:03,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 2086 Invalid, 8381 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [90 Valid, 8291 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-13 16:15:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2024-11-13 16:15:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 527. [2024-11-13 16:15:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 519 states have (on average 1.3179190751445087) internal successors, (684), 520 states have internal predecessors, (684), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 16:15:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 698 transitions. [2024-11-13 16:15:03,926 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 698 transitions. Word has length 248 [2024-11-13 16:15:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:15:03,927 INFO L471 AbstractCegarLoop]: Abstraction has 527 states and 698 transitions. [2024-11-13 16:15:03,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 130 states have (on average 2.169230769230769) internal successors, (282), 126 states have internal predecessors, (282), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-13 16:15:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 698 transitions. [2024-11-13 16:15:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-13 16:15:03,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:15:03,940 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:15:03,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-13 16:15:04,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:15:04,145 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:15:04,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:15:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1581801036, now seen corresponding path program 1 times [2024-11-13 16:15:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:15:04,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295365368] [2024-11-13 16:15:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:15:04,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:15:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:16,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:15:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:17,792 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-13 16:15:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:17,874 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-11-13 16:15:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 1245 proven. 3449 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2024-11-13 16:15:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:15:19,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295365368] [2024-11-13 16:15:19,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295365368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:15:19,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364147821] [2024-11-13 16:15:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:15:19,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:15:19,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:15:19,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:15:19,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 16:15:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:20,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-13 16:15:20,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:15:20,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2024-11-13 16:15:21,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-13 16:15:21,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:15:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 2491 proven. 2081 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2024-11-13 16:15:25,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:15:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 2566 proven. 1795 refuted. 0 times theorem prover too weak. 1544 trivial. 0 not checked. [2024-11-13 16:15:29,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364147821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:15:29,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:15:29,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 30] total 106 [2024-11-13 16:15:29,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988460275] [2024-11-13 16:15:29,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:15:29,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-13 16:15:29,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:15:29,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-13 16:15:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=10753, Unknown=0, NotChecked=0, Total=11130 [2024-11-13 16:15:29,935 INFO L87 Difference]: Start difference. First operand 527 states and 698 transitions. Second operand has 106 states, 104 states have (on average 2.5673076923076925) internal successors, (267), 103 states have internal predecessors, (267), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 16:16:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:16:02,523 INFO L93 Difference]: Finished difference Result 3438 states and 4761 transitions. [2024-11-13 16:16:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2024-11-13 16:16:02,524 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 104 states have (on average 2.5673076923076925) internal successors, (267), 103 states have internal predecessors, (267), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 248 [2024-11-13 16:16:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:16:02,551 INFO L225 Difference]: With dead ends: 3438 [2024-11-13 16:16:02,552 INFO L226 Difference]: Without dead ends: 2784 [2024-11-13 16:16:02,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 600 SyntacticMatches, 1 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30124 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=3292, Invalid=96880, Unknown=0, NotChecked=0, Total=100172 [2024-11-13 16:16:02,571 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 593 mSDsluCounter, 5981 mSDsCounter, 0 mSdLazyCounter, 10914 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 6115 SdHoareTripleChecker+Invalid, 10963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 10914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:16:02,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 6115 Invalid, 10963 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 10914 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2024-11-13 16:16:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2024-11-13 16:16:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 1974. [2024-11-13 16:16:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1952 states have (on average 1.3468237704918034) internal successors, (2629), 1958 states have internal predecessors, (2629), 10 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (45), 10 states have call predecessors, (45), 10 states have call successors, (45) [2024-11-13 16:16:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2684 transitions. [2024-11-13 16:16:02,984 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2684 transitions. Word has length 248 [2024-11-13 16:16:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:16:02,985 INFO L471 AbstractCegarLoop]: Abstraction has 1974 states and 2684 transitions. [2024-11-13 16:16:02,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 104 states have (on average 2.5673076923076925) internal successors, (267), 103 states have internal predecessors, (267), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 16:16:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2684 transitions. [2024-11-13 16:16:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-13 16:16:03,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:16:03,007 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:16:03,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-13 16:16:03,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:03,212 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:16:03,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:16:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2003693968, now seen corresponding path program 2 times [2024-11-13 16:16:03,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:16:03,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612777973] [2024-11-13 16:16:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:16:03,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:16:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:17,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:16:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:17,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-13 16:16:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:19,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-11-13 16:16:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 2488 proven. 2770 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2024-11-13 16:16:20,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:16:20,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612777973] [2024-11-13 16:16:20,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612777973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:16:20,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463934325] [2024-11-13 16:16:20,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:16:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:20,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:16:20,785 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:16:20,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 16:16:21,549 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:16:21,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:16:21,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-11-13 16:16:21,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:16:21,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:16:21,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2024-11-13 16:16:22,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:22,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2024-11-13 16:16:22,584 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:22,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:22,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:22,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:22,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:22,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:23,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:23,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:23,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:23,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:23,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:23,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:23,511 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:23,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:23,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:23,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:23,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:23,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:23,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:23,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:24,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:24,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:24,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:24,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:24,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:24,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:24,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:24,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:24,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:24,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:25,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:25,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:25,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:25,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:16:25,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:25,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2024-11-13 16:16:25,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:16:25,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2024-11-13 16:16:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 2545 proven. 2767 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2024-11-13 16:16:29,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:16:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 2620 proven. 2480 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2024-11-13 16:16:48,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463934325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:16:48,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:16:48,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 89, 66] total 178 [2024-11-13 16:16:48,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609401021] [2024-11-13 16:16:48,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:16:48,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2024-11-13 16:16:48,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:16:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2024-11-13 16:16:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=30423, Unknown=0, NotChecked=0, Total=31506 [2024-11-13 16:16:48,911 INFO L87 Difference]: Start difference. First operand 1974 states and 2684 transitions. Second operand has 178 states, 178 states have (on average 2.0898876404494384) internal successors, (372), 175 states have internal predecessors, (372), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 16:17:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:17:20,616 INFO L93 Difference]: Finished difference Result 7878 states and 10968 transitions. [2024-11-13 16:17:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-11-13 16:17:20,618 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 2.0898876404494384) internal successors, (372), 175 states have internal predecessors, (372), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 248 [2024-11-13 16:17:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:17:20,657 INFO L225 Difference]: With dead ends: 7878 [2024-11-13 16:17:20,657 INFO L226 Difference]: Without dead ends: 5880 [2024-11-13 16:17:20,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 437 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12760 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=2463, Invalid=47043, Unknown=0, NotChecked=0, Total=49506 [2024-11-13 16:17:20,678 INFO L432 NwaCegarLoop]: 140 mSDtfsCounter, 225 mSDsluCounter, 12647 mSDsCounter, 0 mSdLazyCounter, 21624 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 12787 SdHoareTripleChecker+Invalid, 21667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 21624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:17:20,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 12787 Invalid, 21667 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [43 Valid, 21624 Invalid, 0 Unknown, 0 Unchecked, 23.6s Time] [2024-11-13 16:17:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2024-11-13 16:17:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 3952. [2024-11-13 16:17:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3912 states have (on average 1.3394683026584866) internal successors, (5240), 3921 states have internal predecessors, (5240), 19 states have call successors, (19), 11 states have call predecessors, (19), 20 states have return successors, (111), 19 states have call predecessors, (111), 19 states have call successors, (111) [2024-11-13 16:17:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 5370 transitions. [2024-11-13 16:17:21,363 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 5370 transitions. Word has length 248 [2024-11-13 16:17:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:17:21,366 INFO L471 AbstractCegarLoop]: Abstraction has 3952 states and 5370 transitions. [2024-11-13 16:17:21,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 2.0898876404494384) internal successors, (372), 175 states have internal predecessors, (372), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 16:17:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 5370 transitions. [2024-11-13 16:17:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-13 16:17:21,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:17:21,404 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:17:21,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 16:17:21,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 16:17:21,609 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:17:21,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:17:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash 753244212, now seen corresponding path program 3 times [2024-11-13 16:17:21,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:17:21,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502890455] [2024-11-13 16:17:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:17:21,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:17:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:33,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:17:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:33,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-13 16:17:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:35,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-11-13 16:17:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:17:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 2488 proven. 2772 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2024-11-13 16:17:36,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:17:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502890455] [2024-11-13 16:17:36,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502890455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:17:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230489381] [2024-11-13 16:17:36,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:17:36,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:17:36,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:17:36,884 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:17:36,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 16:17:49,257 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2024-11-13 16:17:49,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:17:49,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-11-13 16:17:49,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:17:49,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 16:17:49,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-13 16:17:49,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2024-11-13 16:17:50,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:50,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2024-11-13 16:17:50,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:50,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:50,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:50,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:50,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:50,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:50,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:50,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:50,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:50,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:51,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:51,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:51,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:51,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:51,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:51,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:51,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:51,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:51,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:51,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:51,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:51,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:52,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:52,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:52,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:52,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:52,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:52,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:52,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:52,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:52,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:52,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2024-11-13 16:17:52,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:52,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2024-11-13 16:17:53,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:53,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2024-11-13 16:17:53,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:17:53,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2024-11-13 16:17:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 2390 proven. 2384 refuted. 0 times theorem prover too weak. 1131 trivial. 0 not checked. [2024-11-13 16:17:55,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:18:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 2581 proven. 2094 refuted. 0 times theorem prover too weak. 1230 trivial. 0 not checked. [2024-11-13 16:18:04,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230489381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:18:04,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:18:04,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 59, 53] total 156 [2024-11-13 16:18:04,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706826555] [2024-11-13 16:18:04,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:18:04,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2024-11-13 16:18:04,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:18:04,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2024-11-13 16:18:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1506, Invalid=22674, Unknown=0, NotChecked=0, Total=24180 [2024-11-13 16:18:04,247 INFO L87 Difference]: Start difference. First operand 3952 states and 5370 transitions. Second operand has 156 states, 156 states have (on average 1.8461538461538463) internal successors, (288), 153 states have internal predecessors, (288), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 16:19:07,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:19:17,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:19:47,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:19:48,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:20:17,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:20:18,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:20:30,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:20:42,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:20:49,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:20:55,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:21:21,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:21:48,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:21:49,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:22:17,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:22:30,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:22:34,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:22:37,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:22:46,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:22:48,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:22:52,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:22:59,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:23:01,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:27:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:27:29,029 INFO L93 Difference]: Finished difference Result 35902 states and 52045 transitions. [2024-11-13 16:27:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2024-11-13 16:27:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.8461538461538463) internal successors, (288), 153 states have internal predecessors, (288), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 248 [2024-11-13 16:27:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:27:29,194 INFO L225 Difference]: With dead ends: 35902 [2024-11-13 16:27:29,194 INFO L226 Difference]: Without dead ends: 28185 [2024-11-13 16:27:29,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1104 GetRequests, 456 SyntacticMatches, 10 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148978 ImplicationChecksByTransitivity, 468.2s TimeCoverageRelationStatistics Valid=24766, Invalid=383883, Unknown=311, NotChecked=0, Total=408960 [2024-11-13 16:27:29,281 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 619 mSDsluCounter, 5042 mSDsCounter, 0 mSdLazyCounter, 34989 mSolverCounterSat, 236 mSolverCounterUnsat, 67 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 5134 SdHoareTripleChecker+Invalid, 35292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 34989 IncrementalHoareTripleChecker+Invalid, 67 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:27:29,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 5134 Invalid, 35292 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [236 Valid, 34989 Invalid, 67 Unknown, 0 Unchecked, 105.0s Time] [2024-11-13 16:27:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28185 states. [2024-11-13 16:27:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28185 to 8903. [2024-11-13 16:27:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8903 states, 8824 states have (on average 1.3391885766092475) internal successors, (11817), 8842 states have internal predecessors, (11817), 37 states have call successors, (37), 23 states have call predecessors, (37), 41 states have return successors, (303), 37 states have call predecessors, (303), 37 states have call successors, (303) [2024-11-13 16:27:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 12157 transitions. [2024-11-13 16:27:31,586 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 12157 transitions. Word has length 248 [2024-11-13 16:27:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:27:31,587 INFO L471 AbstractCegarLoop]: Abstraction has 8903 states and 12157 transitions. [2024-11-13 16:27:31,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.8461538461538463) internal successors, (288), 153 states have internal predecessors, (288), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 16:27:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 12157 transitions. [2024-11-13 16:27:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-13 16:27:31,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:27:31,643 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:27:31,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-13 16:27:31,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:27:31,844 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:27:31,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:27:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 38963184, now seen corresponding path program 4 times [2024-11-13 16:27:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:27:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039559864] [2024-11-13 16:27:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:27:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:27:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:27:43,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:27:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:27:45,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-11-13 16:27:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:27:45,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-11-13 16:27:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:27:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5905 backedges. 1244 proven. 4014 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2024-11-13 16:27:47,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:27:47,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039559864] [2024-11-13 16:27:47,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039559864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:27:47,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209969921] [2024-11-13 16:27:47,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:27:47,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:27:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:27:47,336 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:27:47,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36f35c14-e8e8-4f21-a8ad-c45d71353916/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 16:27:47,954 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:27:47,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:27:47,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 265 conjuncts are in the unsatisfiable core [2024-11-13 16:27:47,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:27:49,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-13 16:27:49,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-13 16:27:49,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1