./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB --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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:52:56,726 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:52:56,791 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:52:56,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:52:56,798 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:52:56,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:52:56,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:52:56,838 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:52:56,838 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:52:56,839 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:52:56,839 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:52:56,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:52:56,840 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:52:56,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:52:56,841 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:52:56,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:52:56,841 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:52:56,841 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:52:56,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:52:56,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:52:56,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:52:56,841 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:52:56,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:52:56,842 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:52:56,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:52:56,843 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:52:56,843 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:52:56,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:52:56,844 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:52:56,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:52:56,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:52:56,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:52:56,845 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_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2024-11-28 04:52:57,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:52:57,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:52:57,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:52:57,169 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:52:57,170 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:52:57,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-28 04:53:00,115 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/data/ffe1894f9/fba91c25049e4c8db2ca5fd7b326e239/FLAG80c52ae2b [2024-11-28 04:53:00,380 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:53:00,383 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-28 04:53:00,395 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/data/ffe1894f9/fba91c25049e4c8db2ca5fd7b326e239/FLAG80c52ae2b [2024-11-28 04:53:00,419 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/data/ffe1894f9/fba91c25049e4c8db2ca5fd7b326e239 [2024-11-28 04:53:00,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:53:00,423 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:53:00,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:53:00,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:53:00,430 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:53:00,431 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@695f9c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00, skipping insertion in model container [2024-11-28 04:53:00,435 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,455 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:53:00,676 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_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2834,2847] [2024-11-28 04:53:00,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:53:00,707 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:53:00,742 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_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2834,2847] [2024-11-28 04:53:00,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:53:00,770 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:53:00,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00 WrapperNode [2024-11-28 04:53:00,772 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:53:00,773 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:53:00,773 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:53:00,773 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:53:00,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,795 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,829 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 173 [2024-11-28 04:53:00,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:53:00,833 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:53:00,833 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:53:00,833 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:53:00,843 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,848 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,873 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 04:53:00,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,882 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,883 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,888 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,889 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:53:00,892 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:53:00,893 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:53:00,893 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:53:00,894 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (1/1) ... [2024-11-28 04:53:00,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:53:00,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:00,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:53:00,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:53:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:53:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:53:00,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:53:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:53:00,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:53:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:53:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:53:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:53:00,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:53:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:53:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:53:00,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:53:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:53:00,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:53:00,952 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:53:01,064 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:53:01,066 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:53:01,552 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:53:01,552 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:53:01,943 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:53:01,943 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:53:01,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:53:01 BoogieIcfgContainer [2024-11-28 04:53:01,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:53:01,946 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:53:01,946 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:53:01,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:53:01,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:53:00" (1/3) ... [2024-11-28 04:53:01,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de62f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:53:01, skipping insertion in model container [2024-11-28 04:53:01,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:53:00" (2/3) ... [2024-11-28 04:53:01,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de62f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:53:01, skipping insertion in model container [2024-11-28 04:53:01,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:53:01" (3/3) ... [2024-11-28 04:53:01,953 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2024-11-28 04:53:01,969 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:53:01,970 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-4.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 04:53:01,971 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:53:02,036 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 04:53:02,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 04:53:02,119 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-28 04:53:02,125 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:53:02,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-28 04:53:02,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-28 04:53:02,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-28 04:53:02,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:53:02,163 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;@7634052d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:53:02,163 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 04:53:02,180 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:53:02,180 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-28 04:53:02,180 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:53:02,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:02,181 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:02,182 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:53:02,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1255357254, now seen corresponding path program 1 times [2024-11-28 04:53:02,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:02,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245189646] [2024-11-28 04:53:02,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:02,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:53:02,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245189646] [2024-11-28 04:53:02,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245189646] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:02,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:02,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:53:02,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121383808] [2024-11-28 04:53:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:02,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:53:02,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:02,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:53:02,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:53:02,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:53:02,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:02,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:53:02,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:53:02,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:03,315 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-11-28 04:53:03,315 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-28 04:53:03,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-11-28 04:53:03,317 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-11-28 04:53:03,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-11-28 04:53:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:53:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:53:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-28 04:53:03,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-28 04:53:03,336 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-11-28 04:53:03,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-11-28 04:53:03,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 04:53:03,345 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-11-28 04:53:03,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-11-28 04:53:03,355 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-28 04:53:03,355 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-11-28 04:53:03,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:03,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:03,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:03,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:53:03,356 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:53:03,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:03,356 INFO L85 PathProgramCache]: Analyzing trace with hash -54737550, now seen corresponding path program 1 times [2024-11-28 04:53:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:03,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470060535] [2024-11-28 04:53:03,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:03,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:53:03,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:03,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470060535] [2024-11-28 04:53:03,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470060535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:03,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:03,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:03,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709466266] [2024-11-28 04:53:03,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:03,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:03,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:03,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:03,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:03,742 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:53:03,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:03,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:53:03,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:53:03,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:04,217 INFO L124 PetriNetUnfolderBase]: 65/123 cut-off events. [2024-11-28 04:53:04,218 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:53:04,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 123 events. 65/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 324 event pairs, 22 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 248. Up to 71 conditions per place. [2024-11-28 04:53:04,221 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2024-11-28 04:53:04,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 169 flow [2024-11-28 04:53:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:53:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-11-28 04:53:04,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-28 04:53:04,223 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 52 transitions. [2024-11-28 04:53:04,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 169 flow [2024-11-28 04:53:04,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 38 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 04:53:04,225 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2024-11-28 04:53:04,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-11-28 04:53:04,226 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-11-28 04:53:04,226 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2024-11-28 04:53:04,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:04,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:04,226 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:04,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:53:04,227 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:53:04,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2111444924, now seen corresponding path program 2 times [2024-11-28 04:53:04,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:04,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726640073] [2024-11-28 04:53:04,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:53:04,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:04,299 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:53:04,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:53:04,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:04,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726640073] [2024-11-28 04:53:04,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726640073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:04,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:04,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:04,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70696670] [2024-11-28 04:53:04,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:04,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:04,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:04,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:04,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:04,486 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:53:04,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:04,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:53:04,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:53:04,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:04,758 INFO L124 PetriNetUnfolderBase]: 100/190 cut-off events. [2024-11-28 04:53:04,758 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-28 04:53:04,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 190 events. 100/190 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 585 event pairs, 39 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 531. Up to 120 conditions per place. [2024-11-28 04:53:04,762 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 34 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-11-28 04:53:04,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 242 flow [2024-11-28 04:53:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:53:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-11-28 04:53:04,764 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-28 04:53:04,764 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 48 transitions. [2024-11-28 04:53:04,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 242 flow [2024-11-28 04:53:04,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 42 transitions, 225 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-28 04:53:04,767 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2024-11-28 04:53:04,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-11-28 04:53:04,769 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-11-28 04:53:04,770 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2024-11-28 04:53:04,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:04,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:04,770 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:04,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:53:04,771 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:53:04,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1037113886, now seen corresponding path program 3 times [2024-11-28 04:53:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:04,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024385329] [2024-11-28 04:53:04,772 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:53:04,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:04,824 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 04:53:04,827 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:53:05,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:05,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024385329] [2024-11-28 04:53:05,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024385329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:05,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:05,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:05,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054344883] [2024-11-28 04:53:05,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:05,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:05,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:05,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:05,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:05,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:53:05,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:05,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:53:05,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:53:05,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:05,293 INFO L124 PetriNetUnfolderBase]: 109/204 cut-off events. [2024-11-28 04:53:05,294 INFO L125 PetriNetUnfolderBase]: For 284/284 co-relation queries the response was YES. [2024-11-28 04:53:05,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 204 events. 109/204 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 653 event pairs, 39 based on Foata normal form. 3/182 useless extension candidates. Maximal degree in co-relation 689. Up to 111 conditions per place. [2024-11-28 04:53:05,297 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 33 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2024-11-28 04:53:05,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 307 flow [2024-11-28 04:53:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:05,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:53:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-11-28 04:53:05,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-28 04:53:05,301 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 52 transitions. [2024-11-28 04:53:05,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 307 flow [2024-11-28 04:53:05,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 283 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-28 04:53:05,307 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2024-11-28 04:53:05,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-11-28 04:53:05,310 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2024-11-28 04:53:05,311 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2024-11-28 04:53:05,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:05,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:05,311 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:05,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:53:05,311 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:53:05,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1307387008, now seen corresponding path program 4 times [2024-11-28 04:53:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086265749] [2024-11-28 04:53:05,312 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:53:05,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:05,382 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:53:05,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:53:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086265749] [2024-11-28 04:53:05,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086265749] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:05,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:05,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675859119] [2024-11-28 04:53:05,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:05,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:05,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:05,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:05,624 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:53:05,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:05,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:53:05,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:53:05,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:05,845 INFO L124 PetriNetUnfolderBase]: 106/201 cut-off events. [2024-11-28 04:53:05,845 INFO L125 PetriNetUnfolderBase]: For 488/488 co-relation queries the response was YES. [2024-11-28 04:53:05,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 201 events. 106/201 cut-off events. For 488/488 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 650 event pairs, 46 based on Foata normal form. 3/179 useless extension candidates. Maximal degree in co-relation 752. Up to 160 conditions per place. [2024-11-28 04:53:05,852 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 29 selfloop transitions, 15 changer transitions 0/45 dead transitions. [2024-11-28 04:53:05,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 365 flow [2024-11-28 04:53:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:53:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-28 04:53:05,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-28 04:53:05,853 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 47 transitions. [2024-11-28 04:53:05,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 365 flow [2024-11-28 04:53:05,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 352 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-28 04:53:05,860 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2024-11-28 04:53:05,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-11-28 04:53:05,861 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2024-11-28 04:53:05,861 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2024-11-28 04:53:05,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:05,861 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:05,861 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:05,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:53:05,863 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:53:05,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash 924364654, now seen corresponding path program 5 times [2024-11-28 04:53:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:05,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125847194] [2024-11-28 04:53:05,866 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:53:05,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:05,907 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:53:05,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:53:06,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:06,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125847194] [2024-11-28 04:53:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125847194] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:06,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:06,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:06,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489338327] [2024-11-28 04:53:06,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:06,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:06,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:06,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:06,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:06,088 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:53:06,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:06,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:53:06,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:53:06,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:06,304 INFO L124 PetriNetUnfolderBase]: 107/204 cut-off events. [2024-11-28 04:53:06,305 INFO L125 PetriNetUnfolderBase]: For 641/641 co-relation queries the response was YES. [2024-11-28 04:53:06,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 204 events. 107/204 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 664 event pairs, 34 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 852. Up to 113 conditions per place. [2024-11-28 04:53:06,307 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 35 selfloop transitions, 14 changer transitions 0/50 dead transitions. [2024-11-28 04:53:06,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 432 flow [2024-11-28 04:53:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:53:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-11-28 04:53:06,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-11-28 04:53:06,311 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 51 transitions. [2024-11-28 04:53:06,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 432 flow [2024-11-28 04:53:06,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 378 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-11-28 04:53:06,318 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2024-11-28 04:53:06,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-11-28 04:53:06,320 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2024-11-28 04:53:06,321 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2024-11-28 04:53:06,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:06,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:06,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:06,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 04:53:06,322 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:53:06,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1251975748, now seen corresponding path program 6 times [2024-11-28 04:53:06,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:06,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503790923] [2024-11-28 04:53:06,323 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:53:06,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:06,360 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 04:53:06,360 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:53:06,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:06,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503790923] [2024-11-28 04:53:06,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503790923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:06,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:06,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:53:06,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001342289] [2024-11-28 04:53:06,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:06,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:06,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:06,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:06,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:53:06,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:53:06,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:06,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:53:06,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:53:06,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:53:06,690 INFO L124 PetriNetUnfolderBase]: 106/197 cut-off events. [2024-11-28 04:53:06,692 INFO L125 PetriNetUnfolderBase]: For 655/655 co-relation queries the response was YES. [2024-11-28 04:53:06,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 197 events. 106/197 cut-off events. For 655/655 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 608 event pairs, 45 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 798. Up to 154 conditions per place. [2024-11-28 04:53:06,695 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2024-11-28 04:53:06,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 404 flow [2024-11-28 04:53:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:53:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-28 04:53:06,697 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-28 04:53:06,697 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 47 transitions. [2024-11-28 04:53:06,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 404 flow [2024-11-28 04:53:06,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 370 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 04:53:06,701 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2024-11-28 04:53:06,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-11-28 04:53:06,704 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2024-11-28 04:53:06,705 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2024-11-28 04:53:06,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:53:06,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:53:06,705 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:06,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:53:06,705 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:53:06,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:06,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2110965031, now seen corresponding path program 1 times [2024-11-28 04:53:06,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:06,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811982694] [2024-11-28 04:53:06,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:06,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:53:06,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:06,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811982694] [2024-11-28 04:53:06,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811982694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029230421] [2024-11-28 04:53:06,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:06,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:06,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:06,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:53:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:07,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:53:07,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:07,169 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 [2024-11-28 04:53:07,983 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-28 04:53:07,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 169 [2024-11-28 04:53:18,930 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:53:26,977 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:53:43,081 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:53:51,140 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:54:11,258 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:54:19,269 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:54:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:54:19,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:26,071 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 87 treesize of output 77 [2024-11-28 04:54:26,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:54:26,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2024-11-28 04:54:27,820 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 33 treesize of output 29 [2024-11-28 04:54:27,835 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 04:54:27,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2024-11-28 04:54:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:54:27,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029230421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:27,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:27,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-28 04:54:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001785184] [2024-11-28 04:54:27,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:27,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:54:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:27,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:54:27,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:54:27,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:54:27,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:54:27,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:54:27,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:54:27,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:54:42,945 WARN L286 SmtUtils]: Spent 12.92s on a formula simplification. DAG size of input: 100 DAG size of output: 43 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:54:49,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:54:53,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:54:57,750 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 [] [2024-11-28 04:54:58,222 INFO L124 PetriNetUnfolderBase]: 334/633 cut-off events. [2024-11-28 04:54:58,223 INFO L125 PetriNetUnfolderBase]: For 1708/1708 co-relation queries the response was YES. [2024-11-28 04:54:58,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 633 events. 334/633 cut-off events. For 1708/1708 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2921 event pairs, 15 based on Foata normal form. 11/539 useless extension candidates. Maximal degree in co-relation 2094. Up to 189 conditions per place. [2024-11-28 04:54:58,228 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 88 selfloop transitions, 52 changer transitions 62/203 dead transitions. [2024-11-28 04:54:58,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 203 transitions, 1600 flow [2024-11-28 04:54:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:54:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 04:54:58,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 253 transitions. [2024-11-28 04:54:58,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4517857142857143 [2024-11-28 04:54:58,230 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 28 states and 253 transitions. [2024-11-28 04:54:58,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 203 transitions, 1600 flow [2024-11-28 04:54:58,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 203 transitions, 1488 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-28 04:54:58,239 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 743 flow [2024-11-28 04:54:58,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=743, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-11-28 04:54:58,241 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 66 predicate places. [2024-11-28 04:54:58,242 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 743 flow [2024-11-28 04:54:58,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:54:58,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:54:58,242 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:58,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:54:58,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:58,443 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:54:58,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash 309458759, now seen corresponding path program 2 times [2024-11-28 04:54:58,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:58,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615391994] [2024-11-28 04:54:58,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:58,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:58,510 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:58,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:54:58,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:58,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615391994] [2024-11-28 04:54:58,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615391994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:58,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452480170] [2024-11-28 04:54:58,710 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:58,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:58,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:58,712 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:58,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:54:58,854 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:58,854 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:58,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:54:58,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:58,921 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 [2024-11-28 04:54:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:54:59,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:23,342 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 170 treesize of output 150 [2024-11-28 04:55:23,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:55:23,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 811 treesize of output 679 [2024-11-28 04:56:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:08,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452480170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:08,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:08,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-11-28 04:56:08,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093024508] [2024-11-28 04:56:08,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:08,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:56:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:08,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:56:08,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:56:08,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:56:08,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 743 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:08,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:08,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:56:08,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:34,611 WARN L286 SmtUtils]: Spent 24.63s on a formula simplification. DAG size of input: 154 DAG size of output: 64 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:56:47,645 WARN L286 SmtUtils]: Spent 10.04s on a formula simplification. DAG size of input: 155 DAG size of output: 46 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:57:01,347 INFO L124 PetriNetUnfolderBase]: 332/682 cut-off events. [2024-11-28 04:57:01,347 INFO L125 PetriNetUnfolderBase]: For 3229/3229 co-relation queries the response was YES. [2024-11-28 04:57:01,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3337 conditions, 682 events. 332/682 cut-off events. For 3229/3229 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3494 event pairs, 26 based on Foata normal form. 11/616 useless extension candidates. Maximal degree in co-relation 3221. Up to 260 conditions per place. [2024-11-28 04:57:01,353 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 109 selfloop transitions, 94 changer transitions 23/227 dead transitions. [2024-11-28 04:57:01,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 227 transitions, 2177 flow [2024-11-28 04:57:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 04:57:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-28 04:57:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 285 transitions. [2024-11-28 04:57:01,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41911764705882354 [2024-11-28 04:57:01,356 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 743 flow. Second operand 34 states and 285 transitions. [2024-11-28 04:57:01,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 227 transitions, 2177 flow [2024-11-28 04:57:01,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 227 transitions, 1932 flow, removed 102 selfloop flow, removed 8 redundant places. [2024-11-28 04:57:01,375 INFO L231 Difference]: Finished difference. Result has 119 places, 130 transitions, 1377 flow [2024-11-28 04:57:01,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1377, PETRI_PLACES=119, PETRI_TRANSITIONS=130} [2024-11-28 04:57:01,376 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 98 predicate places. [2024-11-28 04:57:01,376 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 130 transitions, 1377 flow [2024-11-28 04:57:01,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:57:01,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:57:01,377 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:01,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:57:01,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:01,581 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:57:01,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1358836067, now seen corresponding path program 3 times [2024-11-28 04:57:01,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:57:01,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619453672] [2024-11-28 04:57:01,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:57:01,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:57:01,635 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:57:01,635 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:57:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:57:01,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619453672] [2024-11-28 04:57:01,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619453672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:57:01,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169179436] [2024-11-28 04:57:01,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:57:01,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:01,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:01,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:01,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:57:01,957 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:57:01,958 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:01,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 04:57:01,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:02,014 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 [2024-11-28 04:57:07,745 WARN L286 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:57:21,006 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:57:29,016 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:57:37,026 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 04:57:57,285 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 40 treesize of output 28 [2024-11-28 04:57:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:57:57,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:58:20,444 WARN L286 SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 96 DAG size of output: 89 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:58:21,246 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 33 treesize of output 29 [2024-11-28 04:58:21,256 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 04:58:21,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-28 04:58:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:58:21,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169179436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:58:21,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:58:21,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-28 04:58:21,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952650612] [2024-11-28 04:58:21,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:58:21,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:58:21,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:58:21,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:58:21,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:58:21,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:58:21,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 130 transitions, 1377 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:58:21,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:58:21,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:58:21,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:58:35,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:58:41,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:58:44,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:58:45,249 INFO L124 PetriNetUnfolderBase]: 349/752 cut-off events. [2024-11-28 04:58:45,250 INFO L125 PetriNetUnfolderBase]: For 4144/4144 co-relation queries the response was YES. [2024-11-28 04:58:45,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3846 conditions, 752 events. 349/752 cut-off events. For 4144/4144 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4114 event pairs, 5 based on Foata normal form. 9/739 useless extension candidates. Maximal degree in co-relation 3680. Up to 212 conditions per place. [2024-11-28 04:58:45,258 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 93 selfloop transitions, 128 changer transitions 27/249 dead transitions. [2024-11-28 04:58:45,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 249 transitions, 2619 flow [2024-11-28 04:58:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 04:58:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 04:58:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 280 transitions. [2024-11-28 04:58:45,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-28 04:58:45,260 INFO L175 Difference]: Start difference. First operand has 119 places, 130 transitions, 1377 flow. Second operand 35 states and 280 transitions. [2024-11-28 04:58:45,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 249 transitions, 2619 flow [2024-11-28 04:58:45,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 249 transitions, 2349 flow, removed 87 selfloop flow, removed 10 redundant places. [2024-11-28 04:58:45,286 INFO L231 Difference]: Finished difference. Result has 149 places, 161 transitions, 1842 flow [2024-11-28 04:58:45,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1842, PETRI_PLACES=149, PETRI_TRANSITIONS=161} [2024-11-28 04:58:45,287 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 128 predicate places. [2024-11-28 04:58:45,287 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 161 transitions, 1842 flow [2024-11-28 04:58:45,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:58:45,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:58:45,287 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:58:45,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:58:45,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:58:45,488 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:58:45,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:58:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash 875271427, now seen corresponding path program 4 times [2024-11-28 04:58:45,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:58:45,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060530920] [2024-11-28 04:58:45,488 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:58:45,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:58:45,528 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:58:45,528 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:58:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:58:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:58:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060530920] [2024-11-28 04:58:45,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060530920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:58:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424031120] [2024-11-28 04:58:45,785 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:58:45,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:45,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:58:45,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:58:45,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:58:45,881 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:58:45,882 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:58:45,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:58:45,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:58:45,940 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 [2024-11-28 04:59:11,414 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 40 treesize of output 28 [2024-11-28 04:59:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:59:11,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:25,671 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 33 treesize of output 29 [2024-11-28 04:59:25,682 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 04:59:25,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-28 04:59:25,697 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 87 treesize of output 77 [2024-11-28 04:59:25,777 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-11-28 04:59:25,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2024-11-28 04:59:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:59:26,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424031120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:59:26,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:59:26,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-28 04:59:26,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744631097] [2024-11-28 04:59:26,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:26,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:59:26,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:59:26,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:59:26,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:59:26,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 04:59:26,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 161 transitions, 1842 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:59:26,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:59:26,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 04:59:26,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:59:31,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 04:59:33,739 INFO L124 PetriNetUnfolderBase]: 336/734 cut-off events. [2024-11-28 04:59:33,740 INFO L125 PetriNetUnfolderBase]: For 4164/4164 co-relation queries the response was YES. [2024-11-28 04:59:33,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3973 conditions, 734 events. 336/734 cut-off events. For 4164/4164 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4031 event pairs, 9 based on Foata normal form. 9/740 useless extension candidates. Maximal degree in co-relation 3782. Up to 286 conditions per place. [2024-11-28 04:59:33,748 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 84 selfloop transitions, 108 changer transitions 30/223 dead transitions. [2024-11-28 04:59:33,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 223 transitions, 2597 flow [2024-11-28 04:59:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:59:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 04:59:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 192 transitions. [2024-11-28 04:59:33,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-28 04:59:33,752 INFO L175 Difference]: Start difference. First operand has 149 places, 161 transitions, 1842 flow. Second operand 25 states and 192 transitions. [2024-11-28 04:59:33,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 223 transitions, 2597 flow [2024-11-28 04:59:33,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 223 transitions, 2189 flow, removed 139 selfloop flow, removed 20 redundant places. [2024-11-28 04:59:33,802 INFO L231 Difference]: Finished difference. Result has 156 places, 156 transitions, 1775 flow [2024-11-28 04:59:33,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1775, PETRI_PLACES=156, PETRI_TRANSITIONS=156} [2024-11-28 04:59:33,803 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2024-11-28 04:59:33,804 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 156 transitions, 1775 flow [2024-11-28 04:59:33,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:59:33,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:59:33,804 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:59:33,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:59:34,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 04:59:34,008 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:59:34,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:59:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1751401043, now seen corresponding path program 5 times [2024-11-28 04:59:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:59:34,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098141058] [2024-11-28 04:59:34,009 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:59:34,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:59:34,042 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:59:34,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:59:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:59:34,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:59:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098141058] [2024-11-28 04:59:34,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098141058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:59:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624266755] [2024-11-28 04:59:34,269 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:59:34,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:34,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:59:34,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:59:34,366 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:59:34,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:59:34,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:59:34,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:34,421 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 [2024-11-28 04:59:34,808 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 161 treesize of output 145 [2024-11-28 04:59:52,388 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:00:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:00,498 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:10,710 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 87 treesize of output 77 [2024-11-28 05:00:10,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:00:10,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2024-11-28 05:00:12,573 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 33 treesize of output 29 [2024-11-28 05:00:12,581 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 05:00:12,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2024-11-28 05:00:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:12,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624266755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:00:12,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:00:12,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-28 05:00:12,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439021512] [2024-11-28 05:00:12,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:00:12,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:00:12,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:12,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:00:12,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:00:12,648 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:00:12,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 156 transitions, 1775 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:00:12,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:00:12,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:00:12,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:00:30,895 INFO L124 PetriNetUnfolderBase]: 302/648 cut-off events. [2024-11-28 05:00:30,895 INFO L125 PetriNetUnfolderBase]: For 2482/2482 co-relation queries the response was YES. [2024-11-28 05:00:30,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 648 events. 302/648 cut-off events. For 2482/2482 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3346 event pairs, 20 based on Foata normal form. 9/654 useless extension candidates. Maximal degree in co-relation 3293. Up to 340 conditions per place. [2024-11-28 05:00:30,900 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 105 selfloop transitions, 75 changer transitions 10/191 dead transitions. [2024-11-28 05:00:30,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 191 transitions, 2238 flow [2024-11-28 05:00:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:00:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 05:00:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 155 transitions. [2024-11-28 05:00:30,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40789473684210525 [2024-11-28 05:00:30,902 INFO L175 Difference]: Start difference. First operand has 156 places, 156 transitions, 1775 flow. Second operand 19 states and 155 transitions. [2024-11-28 05:00:30,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 191 transitions, 2238 flow [2024-11-28 05:00:30,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 191 transitions, 2007 flow, removed 35 selfloop flow, removed 22 redundant places. [2024-11-28 05:00:30,927 INFO L231 Difference]: Finished difference. Result has 146 places, 151 transitions, 1651 flow [2024-11-28 05:00:30,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1651, PETRI_PLACES=146, PETRI_TRANSITIONS=151} [2024-11-28 05:00:30,928 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2024-11-28 05:00:30,928 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 151 transitions, 1651 flow [2024-11-28 05:00:30,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:00:30,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:00:30,928 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:00:30,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:00:31,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 05:00:31,132 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:00:31,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1530747, now seen corresponding path program 6 times [2024-11-28 05:00:31,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:31,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128299340] [2024-11-28 05:00:31,133 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:00:31,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:31,170 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:00:31,170 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:00:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:00:31,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:31,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128299340] [2024-11-28 05:00:31,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128299340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:00:31,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701191374] [2024-11-28 05:00:31,503 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:00:31,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:31,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:31,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:31,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:00:31,672 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:00:31,672 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:00:31,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 05:00:31,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:31,729 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 [2024-11-28 05:00:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:32,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:43,991 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 170 treesize of output 150 [2024-11-28 05:00:44,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:00:44,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 594 treesize of output 486 [2024-11-28 05:00:55,333 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 05:01:00,725 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 05:01:02,373 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 05:01:02,715 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 05:01:23,556 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 05:01:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:01:55,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701191374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:55,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:01:55,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-28 05:01:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124160299] [2024-11-28 05:01:55,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:55,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:01:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:55,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:01:55,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:01:55,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:01:55,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 151 transitions, 1651 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:01:55,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:01:55,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:01:55,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:01:56,349 INFO L124 PetriNetUnfolderBase]: 306/645 cut-off events. [2024-11-28 05:01:56,349 INFO L125 PetriNetUnfolderBase]: For 2171/2171 co-relation queries the response was YES. [2024-11-28 05:01:56,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 645 events. 306/645 cut-off events. For 2171/2171 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3312 event pairs, 19 based on Foata normal form. 11/653 useless extension candidates. Maximal degree in co-relation 3206. Up to 232 conditions per place. [2024-11-28 05:01:56,355 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 97 selfloop transitions, 85 changer transitions 30/213 dead transitions. [2024-11-28 05:01:56,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 213 transitions, 2362 flow [2024-11-28 05:01:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:01:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 05:01:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 196 transitions. [2024-11-28 05:01:56,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.392 [2024-11-28 05:01:56,357 INFO L175 Difference]: Start difference. First operand has 146 places, 151 transitions, 1651 flow. Second operand 25 states and 196 transitions. [2024-11-28 05:01:56,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 213 transitions, 2362 flow [2024-11-28 05:01:56,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 213 transitions, 2211 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-11-28 05:01:56,386 INFO L231 Difference]: Finished difference. Result has 161 places, 142 transitions, 1618 flow [2024-11-28 05:01:56,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1618, PETRI_PLACES=161, PETRI_TRANSITIONS=142} [2024-11-28 05:01:56,387 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 140 predicate places. [2024-11-28 05:01:56,387 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 142 transitions, 1618 flow [2024-11-28 05:01:56,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:01:56,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:01:56,388 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:56,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:01:56,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:01:56,592 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:01:56,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash 112269071, now seen corresponding path program 7 times [2024-11-28 05:01:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:56,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409294814] [2024-11-28 05:01:56,593 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:01:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:01:56,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409294814] [2024-11-28 05:01:56,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409294814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894309515] [2024-11-28 05:01:56,898 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:01:56,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:56,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:56,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:01:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:57,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:01:57,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:01,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:02:01,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 182 [2024-11-28 05:02:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:02:01,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:09,041 INFO L349 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2024-11-28 05:02:09,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 85 [2024-11-28 05:02:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:02:09,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894309515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:09,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:09,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-28 05:02:09,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736092657] [2024-11-28 05:02:09,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:09,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:02:09,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:09,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:02:09,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2024-11-28 05:02:09,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:02:09,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 142 transitions, 1618 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:09,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:09,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:02:09,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:24,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:02:37,547 WARN L286 SmtUtils]: Spent 11.01s on a formula simplification. DAG size of input: 86 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:02:45,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:02:46,119 INFO L124 PetriNetUnfolderBase]: 352/716 cut-off events. [2024-11-28 05:02:46,119 INFO L125 PetriNetUnfolderBase]: For 2735/2735 co-relation queries the response was YES. [2024-11-28 05:02:46,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3874 conditions, 716 events. 352/716 cut-off events. For 2735/2735 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3636 event pairs, 6 based on Foata normal form. 4/717 useless extension candidates. Maximal degree in co-relation 3755. Up to 160 conditions per place. [2024-11-28 05:02:46,125 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 104 selfloop transitions, 118 changer transitions 8/231 dead transitions. [2024-11-28 05:02:46,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 231 transitions, 2653 flow [2024-11-28 05:02:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:02:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:02:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 187 transitions. [2024-11-28 05:02:46,127 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-11-28 05:02:46,127 INFO L175 Difference]: Start difference. First operand has 161 places, 142 transitions, 1618 flow. Second operand 21 states and 187 transitions. [2024-11-28 05:02:46,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 231 transitions, 2653 flow [2024-11-28 05:02:46,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 231 transitions, 2344 flow, removed 50 selfloop flow, removed 21 redundant places. [2024-11-28 05:02:46,156 INFO L231 Difference]: Finished difference. Result has 155 places, 169 transitions, 2008 flow [2024-11-28 05:02:46,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2008, PETRI_PLACES=155, PETRI_TRANSITIONS=169} [2024-11-28 05:02:46,157 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2024-11-28 05:02:46,157 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 169 transitions, 2008 flow [2024-11-28 05:02:46,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:46,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:02:46,158 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:46,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:02:46,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:02:46,362 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:02:46,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:46,363 INFO L85 PathProgramCache]: Analyzing trace with hash 148870799, now seen corresponding path program 8 times [2024-11-28 05:02:46,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:46,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212229716] [2024-11-28 05:02:46,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:46,400 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:46,400 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:02:46,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:46,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212229716] [2024-11-28 05:02:46,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212229716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:46,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992878714] [2024-11-28 05:02:46,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:46,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:46,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:46,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:46,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:02:46,738 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:46,738 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:46,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:02:46,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:02:47,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:55,295 INFO L349 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2024-11-28 05:02:55,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 85 [2024-11-28 05:02:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:02:55,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992878714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:55,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:55,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-28 05:02:55,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865090777] [2024-11-28 05:02:55,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:55,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:02:55,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:55,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:02:55,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:02:55,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:02:55,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 169 transitions, 2008 flow. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:02:55,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:02:55,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:02:55,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:02:58,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:03:04,294 WARN L286 SmtUtils]: Spent 5.66s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:03:06,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:03:16,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:03:24,867 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 [] [2024-11-28 05:03:24,893 INFO L124 PetriNetUnfolderBase]: 415/853 cut-off events. [2024-11-28 05:03:24,893 INFO L125 PetriNetUnfolderBase]: For 3553/3553 co-relation queries the response was YES. [2024-11-28 05:03:24,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4698 conditions, 853 events. 415/853 cut-off events. For 3553/3553 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4643 event pairs, 7 based on Foata normal form. 8/861 useless extension candidates. Maximal degree in co-relation 4586. Up to 183 conditions per place. [2024-11-28 05:03:24,902 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 115 selfloop transitions, 144 changer transitions 16/276 dead transitions. [2024-11-28 05:03:24,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 276 transitions, 3228 flow [2024-11-28 05:03:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:03:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 05:03:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 220 transitions. [2024-11-28 05:03:24,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-11-28 05:03:24,905 INFO L175 Difference]: Start difference. First operand has 155 places, 169 transitions, 2008 flow. Second operand 24 states and 220 transitions. [2024-11-28 05:03:24,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 276 transitions, 3228 flow [2024-11-28 05:03:24,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 276 transitions, 3008 flow, removed 57 selfloop flow, removed 10 redundant places. [2024-11-28 05:03:24,933 INFO L231 Difference]: Finished difference. Result has 176 places, 189 transitions, 2454 flow [2024-11-28 05:03:24,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2454, PETRI_PLACES=176, PETRI_TRANSITIONS=189} [2024-11-28 05:03:24,934 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2024-11-28 05:03:24,934 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 189 transitions, 2454 flow [2024-11-28 05:03:24,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:24,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:24,934 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:24,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:25,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 05:03:25,134 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:25,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash -461716145, now seen corresponding path program 1 times [2024-11-28 05:03:25,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:25,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143224554] [2024-11-28 05:03:25,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:03:25,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:25,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143224554] [2024-11-28 05:03:25,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143224554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804855865] [2024-11-28 05:03:25,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:03:25,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:25,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:25,337 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:25,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:03:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:25,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:03:25,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:25,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804855865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:25,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:25,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:03:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025791187] [2024-11-28 05:03:25,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:25,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:03:25,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:25,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:03:25,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:03:25,822 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:03:25,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 189 transitions, 2454 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:25,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:25,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:03:25,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:29,571 INFO L124 PetriNetUnfolderBase]: 396/808 cut-off events. [2024-11-28 05:03:29,571 INFO L125 PetriNetUnfolderBase]: For 4076/4076 co-relation queries the response was YES. [2024-11-28 05:03:29,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4815 conditions, 808 events. 396/808 cut-off events. For 4076/4076 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4314 event pairs, 41 based on Foata normal form. 15/823 useless extension candidates. Maximal degree in co-relation 4684. Up to 180 conditions per place. [2024-11-28 05:03:29,580 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 131 selfloop transitions, 115 changer transitions 0/247 dead transitions. [2024-11-28 05:03:29,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 247 transitions, 3351 flow [2024-11-28 05:03:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:03:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 05:03:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 133 transitions. [2024-11-28 05:03:29,581 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-11-28 05:03:29,581 INFO L175 Difference]: Start difference. First operand has 176 places, 189 transitions, 2454 flow. Second operand 16 states and 133 transitions. [2024-11-28 05:03:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 247 transitions, 3351 flow [2024-11-28 05:03:29,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 247 transitions, 3147 flow, removed 50 selfloop flow, removed 14 redundant places. [2024-11-28 05:03:29,623 INFO L231 Difference]: Finished difference. Result has 177 places, 204 transitions, 2720 flow [2024-11-28 05:03:29,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2720, PETRI_PLACES=177, PETRI_TRANSITIONS=204} [2024-11-28 05:03:29,624 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2024-11-28 05:03:29,624 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 204 transitions, 2720 flow [2024-11-28 05:03:29,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:29,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:29,624 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:29,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:29,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:03:29,824 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:29,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1164580415, now seen corresponding path program 2 times [2024-11-28 05:03:29,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:29,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875486886] [2024-11-28 05:03:29,825 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:29,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:29,877 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:29,877 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:30,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875486886] [2024-11-28 05:03:30,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875486886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888903569] [2024-11-28 05:03:30,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:30,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:30,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:30,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:30,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:03:30,503 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:30,503 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:30,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:03:30,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:30,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:30,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888903569] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:30,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:30,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 05:03:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898055486] [2024-11-28 05:03:30,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:30,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:03:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:30,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:03:30,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:03:30,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:03:30,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 204 transitions, 2720 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:30,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:30,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:03:30,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:32,793 INFO L124 PetriNetUnfolderBase]: 469/915 cut-off events. [2024-11-28 05:03:32,793 INFO L125 PetriNetUnfolderBase]: For 4965/4965 co-relation queries the response was YES. [2024-11-28 05:03:32,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5679 conditions, 915 events. 469/915 cut-off events. For 4965/4965 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4851 event pairs, 64 based on Foata normal form. 12/927 useless extension candidates. Maximal degree in co-relation 5573. Up to 342 conditions per place. [2024-11-28 05:03:32,802 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 148 selfloop transitions, 131 changer transitions 0/280 dead transitions. [2024-11-28 05:03:32,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 280 transitions, 3926 flow [2024-11-28 05:03:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:03:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:03:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 154 transitions. [2024-11-28 05:03:32,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45294117647058824 [2024-11-28 05:03:32,804 INFO L175 Difference]: Start difference. First operand has 177 places, 204 transitions, 2720 flow. Second operand 17 states and 154 transitions. [2024-11-28 05:03:32,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 280 transitions, 3926 flow [2024-11-28 05:03:32,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 280 transitions, 3726 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-11-28 05:03:32,851 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 3357 flow [2024-11-28 05:03:32,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3357, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-11-28 05:03:32,852 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 172 predicate places. [2024-11-28 05:03:32,852 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 3357 flow [2024-11-28 05:03:32,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:32,852 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:32,852 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:32,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:03:33,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:03:33,053 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:33,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:33,054 INFO L85 PathProgramCache]: Analyzing trace with hash -914713413, now seen corresponding path program 3 times [2024-11-28 05:03:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:33,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381941141] [2024-11-28 05:03:33,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:33,098 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:03:33,098 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:33,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381941141] [2024-11-28 05:03:33,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381941141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533957096] [2024-11-28 05:03:33,269 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:03:33,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:33,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:33,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:33,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:03:34,130 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:03:34,130 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:34,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:03:34,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:34,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:34,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533957096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:34,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:34,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:03:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122900329] [2024-11-28 05:03:34,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:34,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:03:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:34,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:03:34,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:03:34,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:03:34,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 3357 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:34,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:34,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:03:34,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:35,382 INFO L124 PetriNetUnfolderBase]: 730/1418 cut-off events. [2024-11-28 05:03:35,382 INFO L125 PetriNetUnfolderBase]: For 9228/9228 co-relation queries the response was YES. [2024-11-28 05:03:35,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9081 conditions, 1418 events. 730/1418 cut-off events. For 9228/9228 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8138 event pairs, 40 based on Foata normal form. 8/1426 useless extension candidates. Maximal degree in co-relation 8917. Up to 345 conditions per place. [2024-11-28 05:03:35,394 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 195 selfloop transitions, 213 changer transitions 0/409 dead transitions. [2024-11-28 05:03:35,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 409 transitions, 6140 flow [2024-11-28 05:03:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:03:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 05:03:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 185 transitions. [2024-11-28 05:03:35,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-11-28 05:03:35,396 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 3357 flow. Second operand 20 states and 185 transitions. [2024-11-28 05:03:35,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 409 transitions, 6140 flow [2024-11-28 05:03:35,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 409 transitions, 5876 flow, removed 120 selfloop flow, removed 3 redundant places. [2024-11-28 05:03:35,448 INFO L231 Difference]: Finished difference. Result has 219 places, 325 transitions, 5240 flow [2024-11-28 05:03:35,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5240, PETRI_PLACES=219, PETRI_TRANSITIONS=325} [2024-11-28 05:03:35,449 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 198 predicate places. [2024-11-28 05:03:35,449 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 325 transitions, 5240 flow [2024-11-28 05:03:35,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:35,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:35,449 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:35,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:35,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:03:35,650 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:35,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash -964762293, now seen corresponding path program 4 times [2024-11-28 05:03:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:35,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770890497] [2024-11-28 05:03:35,650 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:35,675 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:35,675 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:35,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:35,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770890497] [2024-11-28 05:03:35,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770890497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750388657] [2024-11-28 05:03:35,956 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:03:35,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:35,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:35,958 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:35,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:03:36,183 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:03:36,183 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:36,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:03:36,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:36,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:36,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750388657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:36,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:36,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:03:36,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865224485] [2024-11-28 05:03:36,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:36,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:03:36,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:36,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:03:36,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:03:36,447 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:03:36,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 325 transitions, 5240 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:36,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:36,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:03:36,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:37,789 INFO L124 PetriNetUnfolderBase]: 770/1495 cut-off events. [2024-11-28 05:03:37,789 INFO L125 PetriNetUnfolderBase]: For 12286/12286 co-relation queries the response was YES. [2024-11-28 05:03:37,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10425 conditions, 1495 events. 770/1495 cut-off events. For 12286/12286 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8721 event pairs, 44 based on Foata normal form. 18/1513 useless extension candidates. Maximal degree in co-relation 10249. Up to 364 conditions per place. [2024-11-28 05:03:37,804 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 199 selfloop transitions, 226 changer transitions 0/426 dead transitions. [2024-11-28 05:03:37,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 426 transitions, 7133 flow [2024-11-28 05:03:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:03:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:03:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 181 transitions. [2024-11-28 05:03:37,806 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-11-28 05:03:37,806 INFO L175 Difference]: Start difference. First operand has 219 places, 325 transitions, 5240 flow. Second operand 21 states and 181 transitions. [2024-11-28 05:03:37,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 426 transitions, 7133 flow [2024-11-28 05:03:37,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 426 transitions, 6655 flow, removed 168 selfloop flow, removed 9 redundant places. [2024-11-28 05:03:37,920 INFO L231 Difference]: Finished difference. Result has 236 places, 352 transitions, 5766 flow [2024-11-28 05:03:37,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5766, PETRI_PLACES=236, PETRI_TRANSITIONS=352} [2024-11-28 05:03:37,921 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2024-11-28 05:03:37,921 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 352 transitions, 5766 flow [2024-11-28 05:03:37,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:37,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:37,921 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:37,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:03:38,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:38,122 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:38,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash 910543589, now seen corresponding path program 5 times [2024-11-28 05:03:38,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:38,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151039971] [2024-11-28 05:03:38,123 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:38,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:38,143 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:38,144 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:38,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151039971] [2024-11-28 05:03:38,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151039971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830479056] [2024-11-28 05:03:38,325 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:03:38,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:38,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:38,328 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:38,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:03:38,564 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:38,565 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:38,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:03:38,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:38,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:38,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:38,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 139 [2024-11-28 05:03:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:39,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830479056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:39,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:39,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 05:03:39,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319743403] [2024-11-28 05:03:39,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:39,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:03:39,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:39,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:03:39,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:03:39,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:03:39,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 352 transitions, 5766 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:39,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:39,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:03:39,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:42,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:03:43,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:03:46,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-28 05:03:51,926 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 [] [2024-11-28 05:03:52,962 INFO L124 PetriNetUnfolderBase]: 776/1524 cut-off events. [2024-11-28 05:03:52,962 INFO L125 PetriNetUnfolderBase]: For 12318/12318 co-relation queries the response was YES. [2024-11-28 05:03:52,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10751 conditions, 1524 events. 776/1524 cut-off events. For 12318/12318 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9045 event pairs, 98 based on Foata normal form. 21/1545 useless extension candidates. Maximal degree in co-relation 10589. Up to 531 conditions per place. [2024-11-28 05:03:52,973 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 202 selfloop transitions, 203 changer transitions 0/406 dead transitions. [2024-11-28 05:03:52,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 406 transitions, 6973 flow [2024-11-28 05:03:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:03:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:03:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 140 transitions. [2024-11-28 05:03:52,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-11-28 05:03:52,974 INFO L175 Difference]: Start difference. First operand has 236 places, 352 transitions, 5766 flow. Second operand 17 states and 140 transitions. [2024-11-28 05:03:52,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 406 transitions, 6973 flow [2024-11-28 05:03:53,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 406 transitions, 6674 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-11-28 05:03:53,053 INFO L231 Difference]: Finished difference. Result has 250 places, 361 transitions, 6086 flow [2024-11-28 05:03:53,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5447, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6086, PETRI_PLACES=250, PETRI_TRANSITIONS=361} [2024-11-28 05:03:53,054 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2024-11-28 05:03:53,054 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 361 transitions, 6086 flow [2024-11-28 05:03:53,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:53,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:53,055 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:53,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:53,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:53,259 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:53,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1774182589, now seen corresponding path program 6 times [2024-11-28 05:03:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:53,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329771007] [2024-11-28 05:03:53,260 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:53,286 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:03:53,286 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:53,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329771007] [2024-11-28 05:03:53,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329771007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8217622] [2024-11-28 05:03:53,479 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:03:53,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:53,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:53,483 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:53,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:03:53,714 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:03:53,714 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:53,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:03:53,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:53,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:53,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 115 [2024-11-28 05:03:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:54,059 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:54,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:03:54,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 139 [2024-11-28 05:03:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:56,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8217622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:56,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:56,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:03:56,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083516535] [2024-11-28 05:03:56,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:56,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:03:56,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:56,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:03:56,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:03:56,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:03:56,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 361 transitions, 6086 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:56,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:56,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:03:56,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:03:57,455 INFO L124 PetriNetUnfolderBase]: 773/1503 cut-off events. [2024-11-28 05:03:57,456 INFO L125 PetriNetUnfolderBase]: For 13183/13183 co-relation queries the response was YES. [2024-11-28 05:03:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10960 conditions, 1503 events. 773/1503 cut-off events. For 13183/13183 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8799 event pairs, 39 based on Foata normal form. 6/1509 useless extension candidates. Maximal degree in co-relation 10786. Up to 435 conditions per place. [2024-11-28 05:03:57,469 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 195 selfloop transitions, 220 changer transitions 0/416 dead transitions. [2024-11-28 05:03:57,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 416 transitions, 7443 flow [2024-11-28 05:03:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:03:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 05:03:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 140 transitions. [2024-11-28 05:03:57,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-28 05:03:57,471 INFO L175 Difference]: Start difference. First operand has 250 places, 361 transitions, 6086 flow. Second operand 15 states and 140 transitions. [2024-11-28 05:03:57,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 416 transitions, 7443 flow [2024-11-28 05:03:57,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 416 transitions, 7141 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-11-28 05:03:57,594 INFO L231 Difference]: Finished difference. Result has 255 places, 365 transitions, 6354 flow [2024-11-28 05:03:57,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6354, PETRI_PLACES=255, PETRI_TRANSITIONS=365} [2024-11-28 05:03:57,594 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2024-11-28 05:03:57,594 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 365 transitions, 6354 flow [2024-11-28 05:03:57,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:57,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:03:57,595 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:57,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:03:57,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:57,795 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:03:57,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:57,796 INFO L85 PathProgramCache]: Analyzing trace with hash -946328267, now seen corresponding path program 7 times [2024-11-28 05:03:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:57,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064835512] [2024-11-28 05:03:57,796 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:57,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:58,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:58,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064835512] [2024-11-28 05:03:58,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064835512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:03:58,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922264313] [2024-11-28 05:03:58,034 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:03:58,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:58,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:58,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:58,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:03:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:58,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:03:58,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:58,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:03:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922264313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:58,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:03:58,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-28 05:03:58,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520160326] [2024-11-28 05:03:58,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:58,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:03:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:58,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:03:58,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:03:58,411 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-28 05:03:58,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 365 transitions, 6354 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:03:58,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:03:58,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-28 05:03:58,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:04:03,834 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 [] [2024-11-28 05:04:04,462 INFO L124 PetriNetUnfolderBase]: 850/1646 cut-off events. [2024-11-28 05:04:04,463 INFO L125 PetriNetUnfolderBase]: For 16297/16297 co-relation queries the response was YES. [2024-11-28 05:04:04,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12243 conditions, 1646 events. 850/1646 cut-off events. For 16297/16297 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 9776 event pairs, 150 based on Foata normal form. 24/1670 useless extension candidates. Maximal degree in co-relation 12054. Up to 896 conditions per place. [2024-11-28 05:04:04,476 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 238 selfloop transitions, 201 changer transitions 0/440 dead transitions. [2024-11-28 05:04:04,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 440 transitions, 8069 flow [2024-11-28 05:04:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:04:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:04:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 148 transitions. [2024-11-28 05:04:04,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-11-28 05:04:04,478 INFO L175 Difference]: Start difference. First operand has 255 places, 365 transitions, 6354 flow. Second operand 18 states and 148 transitions. [2024-11-28 05:04:04,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 440 transitions, 8069 flow [2024-11-28 05:04:04,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 440 transitions, 7843 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-11-28 05:04:04,696 INFO L231 Difference]: Finished difference. Result has 272 places, 394 transitions, 7338 flow [2024-11-28 05:04:04,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6044, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7338, PETRI_PLACES=272, PETRI_TRANSITIONS=394} [2024-11-28 05:04:04,697 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 251 predicate places. [2024-11-28 05:04:04,697 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 394 transitions, 7338 flow [2024-11-28 05:04:04,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:04,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:04:04,697 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:04,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:04:04,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:04,898 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 05:04:04,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash -930034329, now seen corresponding path program 9 times [2024-11-28 05:04:04,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:04,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684915483] [2024-11-28 05:04:04,898 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:04,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:04,925 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:04,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:04:05,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:05,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684915483] [2024-11-28 05:04:05,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684915483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:05,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187535902] [2024-11-28 05:04:05,523 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:05,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:05,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:05,525 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:05,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8c35dec-2596-4aa3-87e4-1388fdd15ef2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:04:05,634 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:04:05,634 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:05,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:04:05,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:05,680 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 [2024-11-28 05:04:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:04:09,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:24,664 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 05:04:26,310 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 313 treesize of output 281 [2024-11-28 05:04:26,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:04:26,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 618 treesize of output 684 [2024-11-28 05:04:48,680 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 05:04:53,170 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 05:05:52,372 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 05:06:43,180 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 05:06:45,032 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.