./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:36:32,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:36:32,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:36:33,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:36:33,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:36:33,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:36:33,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:36:33,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:36:33,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:36:33,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:36:33,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:36:33,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:36:33,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:36:33,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:36:33,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:36:33,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:36:33,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:36:33,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:36:33,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:36:33,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:36:33,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:36:33,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:36:33,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:36:33,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:36:33,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:36:33,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:36:33,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:36:33,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:36:33,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:36:33,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:36:33,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:36:33,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:36:33,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:36:33,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:36:33,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:36:33,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:36:33,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:36:33,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:36:33,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:36:33,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:36:33,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:36:33,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:36:33,087 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:36:33,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:36:33,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:36:33,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:36:33,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:36:33,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:36:33,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:36:33,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:36:33,091 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:36:33,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:36:33,092 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:36:33,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:36:33,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:36:33,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:36:33,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:36:33,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:36:33,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:36:33,093 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:36:33,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:36:33,094 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:36:33,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:36:33,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:36:33,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:36:33,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:36:33,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:33,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:36:33,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:36:33,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:36:33,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:36:33,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:36:33,098 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:36:33,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:36:33,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:36:33,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2022-11-16 11:36:33,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:36:33,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:36:33,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:36:33,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:36:33,425 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:36:33,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-11-16 11:36:33,493 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/data/d8cd25431/24260886aafb4c25af04e1658aa0a292/FLAG64f2514c8 [2022-11-16 11:36:34,033 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:36:34,033 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/sv-benchmarks/c/weaver/mult-comm.wvr.c [2022-11-16 11:36:34,045 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/data/d8cd25431/24260886aafb4c25af04e1658aa0a292/FLAG64f2514c8 [2022-11-16 11:36:34,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/data/d8cd25431/24260886aafb4c25af04e1658aa0a292 [2022-11-16 11:36:34,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:36:34,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:36:34,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:34,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:36:34,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:36:34,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f346d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34, skipping insertion in model container [2022-11-16 11:36:34,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:36:34,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:36:34,621 WARN L229 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_a67806ac-cb1e-4317-8e33-7de824fb50c3/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-11-16 11:36:34,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:34,636 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:36:34,651 WARN L229 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_a67806ac-cb1e-4317-8e33-7de824fb50c3/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2022-11-16 11:36:34,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:36:34,664 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:36:34,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34 WrapperNode [2022-11-16 11:36:34,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:36:34,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:34,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:36:34,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:36:34,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,694 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-11-16 11:36:34,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:36:34,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:36:34,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:36:34,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:36:34,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,733 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:36:34,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:36:34,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:36:34,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:36:34,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (1/1) ... [2022-11-16 11:36:34,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:36:34,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:34,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:36:34,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:36:34,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:36:34,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:36:34,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:36:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:36:34,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:36:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:36:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:36:34,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:36:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:36:34,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:36:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:36:34,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:36:34,846 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:36:34,934 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:36:34,938 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:36:35,181 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:36:35,189 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:36:35,189 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:36:35,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:35 BoogieIcfgContainer [2022-11-16 11:36:35,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:36:35,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:36:35,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:36:35,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:36:35,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:36:34" (1/3) ... [2022-11-16 11:36:35,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2282ea59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:35, skipping insertion in model container [2022-11-16 11:36:35,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:36:34" (2/3) ... [2022-11-16 11:36:35,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2282ea59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:36:35, skipping insertion in model container [2022-11-16 11:36:35,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:36:35" (3/3) ... [2022-11-16 11:36:35,201 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-11-16 11:36:35,210 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:36:35,222 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:36:35,222 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:36:35,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:36:35,310 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:36:35,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2022-11-16 11:36:35,415 INFO L130 PetriNetUnfolder]: 5/78 cut-off events. [2022-11-16 11:36:35,415 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:36:35,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2022-11-16 11:36:35,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2022-11-16 11:36:35,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2022-11-16 11:36:35,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:36:35,443 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@78e0ba66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:36:35,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:36:35,472 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-11-16 11:36:35,473 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:36:35,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:35,474 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:35,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1776550383, now seen corresponding path program 1 times [2022-11-16 11:36:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:35,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761490063] [2022-11-16 11:36:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:35,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:35,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761490063] [2022-11-16 11:36:35,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761490063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:35,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:35,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:36:35,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261719326] [2022-11-16 11:36:35,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:36:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:36:35,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:36:35,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2022-11-16 11:36:35,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 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) [2022-11-16 11:36:35,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:35,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2022-11-16 11:36:35,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:35,987 INFO L130 PetriNetUnfolder]: 2/66 cut-off events. [2022-11-16 11:36:35,988 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 11:36:35,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2022-11-16 11:36:35,990 INFO L137 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2022-11-16 11:36:35,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-11-16 11:36:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:36:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:36:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2022-11-16 11:36:36,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.94375 [2022-11-16 11:36:36,004 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2022-11-16 11:36:36,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2022-11-16 11:36:36,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:36,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2022-11-16 11:36:36,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-11-16 11:36:36,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2022-11-16 11:36:36,016 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2022-11-16 11:36:36,018 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2022-11-16 11:36:36,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-11-16 11:36:36,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:36:36,024 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2022-11-16 11:36:36,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2022-11-16 11:36:36,031 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-11-16 11:36:36,031 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2022-11-16 11:36:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 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) [2022-11-16 11:36:36,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:36,032 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:36,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:36:36,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:36,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2022-11-16 11:36:36,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:36,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175908386] [2022-11-16 11:36:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:36,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:36,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175908386] [2022-11-16 11:36:36,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175908386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:36:36,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:36:36,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:36:36,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112685534] [2022-11-16 11:36:36,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:36,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:36:36,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:36:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:36:36,771 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2022-11-16 11:36:36,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 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) [2022-11-16 11:36:36,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:36,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2022-11-16 11:36:36,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:36,930 INFO L130 PetriNetUnfolder]: 11/127 cut-off events. [2022-11-16 11:36:36,935 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 11:36:36,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 127 events. 11/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 166. Up to 17 conditions per place. [2022-11-16 11:36:36,939 INFO L137 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-11-16 11:36:36,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2022-11-16 11:36:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:36:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:36:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2022-11-16 11:36:36,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2022-11-16 11:36:36,949 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2022-11-16 11:36:36,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2022-11-16 11:36:36,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:36,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2022-11-16 11:36:36,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 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) [2022-11-16 11:36:36,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 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) [2022-11-16 11:36:36,960 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 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) [2022-11-16 11:36:36,960 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2022-11-16 11:36:36,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2022-11-16 11:36:36,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:36:36,966 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2022-11-16 11:36:36,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-11-16 11:36:36,967 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-11-16 11:36:36,967 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2022-11-16 11:36:36,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 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) [2022-11-16 11:36:36,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:36,969 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:36,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:36:36,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -919337767, now seen corresponding path program 1 times [2022-11-16 11:36:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:36,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278952115] [2022-11-16 11:36:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:36,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:37,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:37,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278952115] [2022-11-16 11:36:37,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278952115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:37,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325389619] [2022-11-16 11:36:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:37,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:37,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:37,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:37,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:36:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:36:37,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:38,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:38,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325389619] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:38,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:38,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 17 [2022-11-16 11:36:38,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616054723] [2022-11-16 11:36:38,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:38,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:36:38,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:36:38,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:36:38,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-16 11:36:38,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 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) [2022-11-16 11:36:38,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:38,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-16 11:36:38,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:38,921 INFO L130 PetriNetUnfolder]: 123/382 cut-off events. [2022-11-16 11:36:38,921 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-16 11:36:38,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 382 events. 123/382 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1722 event pairs, 15 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 721. Up to 98 conditions per place. [2022-11-16 11:36:38,930 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 59 selfloop transitions, 15 changer transitions 4/119 dead transitions. [2022-11-16 11:36:38,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 453 flow [2022-11-16 11:36:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:36:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:36:38,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 588 transitions. [2022-11-16 11:36:38,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.735 [2022-11-16 11:36:38,934 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 588 transitions. [2022-11-16 11:36:38,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 588 transitions. [2022-11-16 11:36:38,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:38,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 588 transitions. [2022-11-16 11:36:38,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.8) internal successors, (588), 10 states have internal predecessors, (588), 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) [2022-11-16 11:36:38,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 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) [2022-11-16 11:36:38,939 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 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) [2022-11-16 11:36:38,939 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 10 states and 588 transitions. [2022-11-16 11:36:38,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 453 flow [2022-11-16 11:36:38,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 443 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-16 11:36:38,946 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 263 flow [2022-11-16 11:36:38,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2022-11-16 11:36:38,950 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-11-16 11:36:38,951 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 263 flow [2022-11-16 11:36:38,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 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) [2022-11-16 11:36:38,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:38,952 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:38,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:39,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:39,158 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:39,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1688628123, now seen corresponding path program 1 times [2022-11-16 11:36:39,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:39,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737566821] [2022-11-16 11:36:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:39,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:39,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:39,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737566821] [2022-11-16 11:36:39,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737566821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:39,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243600832] [2022-11-16 11:36:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:39,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:39,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:39,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:39,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:36:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:39,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:36:39,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:39,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:40,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243600832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:40,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:40,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2022-11-16 11:36:40,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145042799] [2022-11-16 11:36:40,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:40,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:36:40,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:40,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:36:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:36:40,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-16 11:36:40,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 263 flow. Second operand has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 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) [2022-11-16 11:36:40,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:40,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-16 11:36:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:40,779 INFO L130 PetriNetUnfolder]: 53/291 cut-off events. [2022-11-16 11:36:40,779 INFO L131 PetriNetUnfolder]: For 250/262 co-relation queries the response was YES. [2022-11-16 11:36:40,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 291 events. 53/291 cut-off events. For 250/262 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1306 event pairs, 5 based on Foata normal form. 4/276 useless extension candidates. Maximal degree in co-relation 649. Up to 53 conditions per place. [2022-11-16 11:36:40,782 INFO L137 encePairwiseOnDemand]: 71/80 looper letters, 35 selfloop transitions, 8 changer transitions 11/104 dead transitions. [2022-11-16 11:36:40,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 476 flow [2022-11-16 11:36:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:36:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 554 transitions. [2022-11-16 11:36:40,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7694444444444445 [2022-11-16 11:36:40,785 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 554 transitions. [2022-11-16 11:36:40,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 554 transitions. [2022-11-16 11:36:40,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:40,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 554 transitions. [2022-11-16 11:36:40,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.55555555555556) internal successors, (554), 9 states have internal predecessors, (554), 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) [2022-11-16 11:36:40,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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) [2022-11-16 11:36:40,791 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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) [2022-11-16 11:36:40,791 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 263 flow. Second operand 9 states and 554 transitions. [2022-11-16 11:36:40,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 476 flow [2022-11-16 11:36:40,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 104 transitions, 443 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-11-16 11:36:40,802 INFO L231 Difference]: Finished difference. Result has 93 places, 79 transitions, 282 flow [2022-11-16 11:36:40,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=93, PETRI_TRANSITIONS=79} [2022-11-16 11:36:40,804 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 22 predicate places. [2022-11-16 11:36:40,804 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 79 transitions, 282 flow [2022-11-16 11:36:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 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) [2022-11-16 11:36:40,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:40,805 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:40,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:41,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:41,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1272231241, now seen corresponding path program 2 times [2022-11-16 11:36:41,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124089521] [2022-11-16 11:36:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:41,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:41,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:41,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124089521] [2022-11-16 11:36:41,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124089521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:41,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99728242] [2022-11-16 11:36:41,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:41,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:41,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:41,422 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:41,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:36:41,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:41,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:41,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:36:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:41,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:42,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99728242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:42,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:42,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 18 [2022-11-16 11:36:42,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793365355] [2022-11-16 11:36:42,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:42,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:36:42,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:42,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:36:42,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:36:42,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-16 11:36:42,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 79 transitions, 282 flow. Second operand has 18 states, 18 states have (on average 53.55555555555556) internal successors, (964), 18 states have internal predecessors, (964), 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) [2022-11-16 11:36:42,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:42,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-16 11:36:42,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:42,970 INFO L130 PetriNetUnfolder]: 156/562 cut-off events. [2022-11-16 11:36:42,970 INFO L131 PetriNetUnfolder]: For 551/551 co-relation queries the response was YES. [2022-11-16 11:36:42,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1393 conditions, 562 events. 156/562 cut-off events. For 551/551 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3005 event pairs, 26 based on Foata normal form. 3/560 useless extension candidates. Maximal degree in co-relation 1378. Up to 121 conditions per place. [2022-11-16 11:36:42,975 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 81 selfloop transitions, 29 changer transitions 18/169 dead transitions. [2022-11-16 11:36:42,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 169 transitions, 918 flow [2022-11-16 11:36:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:36:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 11:36:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1092 transitions. [2022-11-16 11:36:42,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.718421052631579 [2022-11-16 11:36:42,979 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1092 transitions. [2022-11-16 11:36:42,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1092 transitions. [2022-11-16 11:36:42,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:42,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1092 transitions. [2022-11-16 11:36:42,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 57.473684210526315) internal successors, (1092), 19 states have internal predecessors, (1092), 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) [2022-11-16 11:36:42,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 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) [2022-11-16 11:36:42,987 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 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) [2022-11-16 11:36:42,988 INFO L175 Difference]: Start difference. First operand has 93 places, 79 transitions, 282 flow. Second operand 19 states and 1092 transitions. [2022-11-16 11:36:42,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 169 transitions, 918 flow [2022-11-16 11:36:42,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 169 transitions, 832 flow, removed 32 selfloop flow, removed 6 redundant places. [2022-11-16 11:36:42,995 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 496 flow [2022-11-16 11:36:42,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=496, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2022-11-16 11:36:42,996 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 42 predicate places. [2022-11-16 11:36:42,996 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 496 flow [2022-11-16 11:36:42,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 53.55555555555556) internal successors, (964), 18 states have internal predecessors, (964), 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) [2022-11-16 11:36:42,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:42,997 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:43,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:43,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:43,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1152496093, now seen corresponding path program 3 times [2022-11-16 11:36:43,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:43,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142937175] [2022-11-16 11:36:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:43,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:43,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:43,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142937175] [2022-11-16 11:36:43,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142937175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:43,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147249457] [2022-11-16 11:36:43,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:43,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:43,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:43,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:36:43,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:36:43,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:43,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:43,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:36:44,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147249457] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:44,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:44,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 13 [2022-11-16 11:36:44,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838062277] [2022-11-16 11:36:44,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:36:44,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:36:44,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:36:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:36:44,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-16 11:36:44,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 496 flow. Second operand has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 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) [2022-11-16 11:36:44,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:44,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-16 11:36:44,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:44,519 INFO L130 PetriNetUnfolder]: 60/387 cut-off events. [2022-11-16 11:36:44,519 INFO L131 PetriNetUnfolder]: For 730/792 co-relation queries the response was YES. [2022-11-16 11:36:44,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 387 events. 60/387 cut-off events. For 730/792 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2012 event pairs, 10 based on Foata normal form. 10/387 useless extension candidates. Maximal degree in co-relation 945. Up to 71 conditions per place. [2022-11-16 11:36:44,523 INFO L137 encePairwiseOnDemand]: 71/80 looper letters, 44 selfloop transitions, 14 changer transitions 9/115 dead transitions. [2022-11-16 11:36:44,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 115 transitions, 755 flow [2022-11-16 11:36:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:36:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:36:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 491 transitions. [2022-11-16 11:36:44,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7671875 [2022-11-16 11:36:44,526 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 491 transitions. [2022-11-16 11:36:44,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 491 transitions. [2022-11-16 11:36:44,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:44,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 491 transitions. [2022-11-16 11:36:44,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 61.375) internal successors, (491), 8 states have internal predecessors, (491), 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) [2022-11-16 11:36:44,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 80.0) internal successors, (720), 9 states have internal predecessors, (720), 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) [2022-11-16 11:36:44,531 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 80.0) internal successors, (720), 9 states have internal predecessors, (720), 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) [2022-11-16 11:36:44,532 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 496 flow. Second operand 8 states and 491 transitions. [2022-11-16 11:36:44,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 115 transitions, 755 flow [2022-11-16 11:36:44,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 115 transitions, 671 flow, removed 34 selfloop flow, removed 10 redundant places. [2022-11-16 11:36:44,542 INFO L231 Difference]: Finished difference. Result has 108 places, 98 transitions, 488 flow [2022-11-16 11:36:44,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=488, PETRI_PLACES=108, PETRI_TRANSITIONS=98} [2022-11-16 11:36:44,546 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 37 predicate places. [2022-11-16 11:36:44,546 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 98 transitions, 488 flow [2022-11-16 11:36:44,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.875) internal successors, (463), 8 states have internal predecessors, (463), 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) [2022-11-16 11:36:44,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:44,547 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:44,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:44,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:44,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1852234681, now seen corresponding path program 2 times [2022-11-16 11:36:44,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:44,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665585034] [2022-11-16 11:36:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:45,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:45,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665585034] [2022-11-16 11:36:45,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665585034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:45,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820288967] [2022-11-16 11:36:45,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:45,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:45,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:45,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:45,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:36:45,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:45,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:45,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:46,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820288967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:46,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:46,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-11-16 11:36:46,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768950470] [2022-11-16 11:36:46,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:46,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:36:46,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:36:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:36:46,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-16 11:36:46,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 98 transitions, 488 flow. Second operand has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 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) [2022-11-16 11:36:46,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:46,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-16 11:36:46,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:47,127 INFO L130 PetriNetUnfolder]: 85/457 cut-off events. [2022-11-16 11:36:47,127 INFO L131 PetriNetUnfolder]: For 746/772 co-relation queries the response was YES. [2022-11-16 11:36:47,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1227 conditions, 457 events. 85/457 cut-off events. For 746/772 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2432 event pairs, 0 based on Foata normal form. 16/464 useless extension candidates. Maximal degree in co-relation 1205. Up to 83 conditions per place. [2022-11-16 11:36:47,132 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 42 selfloop transitions, 42 changer transitions 12/152 dead transitions. [2022-11-16 11:36:47,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 152 transitions, 957 flow [2022-11-16 11:36:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:36:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 11:36:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1027 transitions. [2022-11-16 11:36:47,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7551470588235294 [2022-11-16 11:36:47,136 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1027 transitions. [2022-11-16 11:36:47,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1027 transitions. [2022-11-16 11:36:47,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:47,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1027 transitions. [2022-11-16 11:36:47,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.411764705882355) internal successors, (1027), 17 states have internal predecessors, (1027), 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) [2022-11-16 11:36:47,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 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) [2022-11-16 11:36:47,144 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 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) [2022-11-16 11:36:47,144 INFO L175 Difference]: Start difference. First operand has 108 places, 98 transitions, 488 flow. Second operand 17 states and 1027 transitions. [2022-11-16 11:36:47,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 152 transitions, 957 flow [2022-11-16 11:36:47,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 152 transitions, 887 flow, removed 19 selfloop flow, removed 6 redundant places. [2022-11-16 11:36:47,153 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 747 flow [2022-11-16 11:36:47,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=747, PETRI_PLACES=129, PETRI_TRANSITIONS=117} [2022-11-16 11:36:47,154 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 58 predicate places. [2022-11-16 11:36:47,154 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 747 flow [2022-11-16 11:36:47,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 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) [2022-11-16 11:36:47,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:47,156 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:47,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:47,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:47,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:47,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:47,362 INFO L85 PathProgramCache]: Analyzing trace with hash -725373525, now seen corresponding path program 3 times [2022-11-16 11:36:47,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:47,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508677626] [2022-11-16 11:36:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:47,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:47,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:47,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508677626] [2022-11-16 11:36:47,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508677626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:47,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116312882] [2022-11-16 11:36:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:47,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:47,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:47,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:36:47,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:36:47,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:36:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:48,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:48,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116312882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:48,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:48,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-11-16 11:36:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518793191] [2022-11-16 11:36:48,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:48,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:36:48,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:36:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:36:48,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-16 11:36:48,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 747 flow. Second operand has 15 states, 15 states have (on average 57.93333333333333) internal successors, (869), 15 states have internal predecessors, (869), 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) [2022-11-16 11:36:48,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:48,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-16 11:36:48,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:48,971 INFO L130 PetriNetUnfolder]: 101/606 cut-off events. [2022-11-16 11:36:48,973 INFO L131 PetriNetUnfolder]: For 1496/1548 co-relation queries the response was YES. [2022-11-16 11:36:48,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 606 events. 101/606 cut-off events. For 1496/1548 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3733 event pairs, 1 based on Foata normal form. 38/638 useless extension candidates. Maximal degree in co-relation 1777. Up to 85 conditions per place. [2022-11-16 11:36:48,979 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 49 selfloop transitions, 60 changer transitions 12/177 dead transitions. [2022-11-16 11:36:48,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 177 transitions, 1388 flow [2022-11-16 11:36:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:36:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 11:36:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1150 transitions. [2022-11-16 11:36:48,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.756578947368421 [2022-11-16 11:36:48,983 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1150 transitions. [2022-11-16 11:36:48,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1150 transitions. [2022-11-16 11:36:48,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:48,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1150 transitions. [2022-11-16 11:36:48,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.526315789473685) internal successors, (1150), 19 states have internal predecessors, (1150), 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) [2022-11-16 11:36:48,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 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) [2022-11-16 11:36:48,991 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 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) [2022-11-16 11:36:48,991 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 747 flow. Second operand 19 states and 1150 transitions. [2022-11-16 11:36:48,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 177 transitions, 1388 flow [2022-11-16 11:36:49,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 177 transitions, 1300 flow, removed 37 selfloop flow, removed 9 redundant places. [2022-11-16 11:36:49,008 INFO L231 Difference]: Finished difference. Result has 145 places, 134 transitions, 1071 flow [2022-11-16 11:36:49,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1071, PETRI_PLACES=145, PETRI_TRANSITIONS=134} [2022-11-16 11:36:49,010 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 74 predicate places. [2022-11-16 11:36:49,010 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 134 transitions, 1071 flow [2022-11-16 11:36:49,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.93333333333333) internal successors, (869), 15 states have internal predecessors, (869), 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) [2022-11-16 11:36:49,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:49,011 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:49,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:49,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:49,212 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1957011613, now seen corresponding path program 4 times [2022-11-16 11:36:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:49,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179097247] [2022-11-16 11:36:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:49,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:49,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179097247] [2022-11-16 11:36:49,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179097247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:49,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31450761] [2022-11-16 11:36:49,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:36:49,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:49,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:49,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:49,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:36:49,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:36:49,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:49,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:36:49,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:50,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31450761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:50,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:50,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-11-16 11:36:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361531898] [2022-11-16 11:36:50,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:50,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:36:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:36:50,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:36:50,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-11-16 11:36:50,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 134 transitions, 1071 flow. Second operand has 17 states, 17 states have (on average 57.94117647058823) internal successors, (985), 17 states have internal predecessors, (985), 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) [2022-11-16 11:36:50,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:50,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-11-16 11:36:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:51,441 INFO L130 PetriNetUnfolder]: 158/773 cut-off events. [2022-11-16 11:36:51,443 INFO L131 PetriNetUnfolder]: For 2708/2790 co-relation queries the response was YES. [2022-11-16 11:36:51,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 773 events. 158/773 cut-off events. For 2708/2790 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5585 event pairs, 34 based on Foata normal form. 31/783 useless extension candidates. Maximal degree in co-relation 2464. Up to 227 conditions per place. [2022-11-16 11:36:51,449 INFO L137 encePairwiseOnDemand]: 70/80 looper letters, 49 selfloop transitions, 65 changer transitions 23/194 dead transitions. [2022-11-16 11:36:51,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 194 transitions, 1840 flow [2022-11-16 11:36:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:36:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-16 11:36:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1494 transitions. [2022-11-16 11:36:51,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.747 [2022-11-16 11:36:51,455 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1494 transitions. [2022-11-16 11:36:51,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1494 transitions. [2022-11-16 11:36:51,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:51,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1494 transitions. [2022-11-16 11:36:51,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 59.76) internal successors, (1494), 25 states have internal predecessors, (1494), 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) [2022-11-16 11:36:51,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 80.0) internal successors, (2080), 26 states have internal predecessors, (2080), 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) [2022-11-16 11:36:51,468 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 80.0) internal successors, (2080), 26 states have internal predecessors, (2080), 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) [2022-11-16 11:36:51,468 INFO L175 Difference]: Start difference. First operand has 145 places, 134 transitions, 1071 flow. Second operand 25 states and 1494 transitions. [2022-11-16 11:36:51,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 194 transitions, 1840 flow [2022-11-16 11:36:51,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 194 transitions, 1651 flow, removed 56 selfloop flow, removed 14 redundant places. [2022-11-16 11:36:51,490 INFO L231 Difference]: Finished difference. Result has 160 places, 148 transitions, 1326 flow [2022-11-16 11:36:51,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1326, PETRI_PLACES=160, PETRI_TRANSITIONS=148} [2022-11-16 11:36:51,492 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 89 predicate places. [2022-11-16 11:36:51,492 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 148 transitions, 1326 flow [2022-11-16 11:36:51,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.94117647058823) internal successors, (985), 17 states have internal predecessors, (985), 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) [2022-11-16 11:36:51,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:51,493 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:51,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:51,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:51,699 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -75381783, now seen corresponding path program 5 times [2022-11-16 11:36:51,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:51,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802158084] [2022-11-16 11:36:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:51,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:52,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:52,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802158084] [2022-11-16 11:36:52,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802158084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:52,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472649097] [2022-11-16 11:36:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:36:52,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:52,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:52,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:52,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:36:52,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:36:52,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:52,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:36:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:52,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:52,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472649097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:52,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:52,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-11-16 11:36:52,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406031725] [2022-11-16 11:36:52,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:52,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:36:52,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:52,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:36:52,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:36:52,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-11-16 11:36:52,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 148 transitions, 1326 flow. Second operand has 19 states, 19 states have (on average 53.8421052631579) internal successors, (1023), 19 states have internal predecessors, (1023), 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) [2022-11-16 11:36:52,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:36:52,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-11-16 11:36:52,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:36:54,117 INFO L130 PetriNetUnfolder]: 312/1130 cut-off events. [2022-11-16 11:36:54,119 INFO L131 PetriNetUnfolder]: For 4773/4773 co-relation queries the response was YES. [2022-11-16 11:36:54,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 1130 events. 312/1130 cut-off events. For 4773/4773 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8114 event pairs, 71 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 4079. Up to 349 conditions per place. [2022-11-16 11:36:54,129 INFO L137 encePairwiseOnDemand]: 69/80 looper letters, 117 selfloop transitions, 64 changer transitions 20/242 dead transitions. [2022-11-16 11:36:54,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 242 transitions, 2349 flow [2022-11-16 11:36:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:36:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 11:36:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1259 transitions. [2022-11-16 11:36:54,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7153409090909091 [2022-11-16 11:36:54,133 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1259 transitions. [2022-11-16 11:36:54,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1259 transitions. [2022-11-16 11:36:54,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:36:54,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1259 transitions. [2022-11-16 11:36:54,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 57.22727272727273) internal successors, (1259), 22 states have internal predecessors, (1259), 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) [2022-11-16 11:36:54,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 80.0) internal successors, (1840), 23 states have internal predecessors, (1840), 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) [2022-11-16 11:36:54,144 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 80.0) internal successors, (1840), 23 states have internal predecessors, (1840), 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) [2022-11-16 11:36:54,144 INFO L175 Difference]: Start difference. First operand has 160 places, 148 transitions, 1326 flow. Second operand 22 states and 1259 transitions. [2022-11-16 11:36:54,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 242 transitions, 2349 flow [2022-11-16 11:36:54,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 242 transitions, 2153 flow, removed 54 selfloop flow, removed 17 redundant places. [2022-11-16 11:36:54,182 INFO L231 Difference]: Finished difference. Result has 163 places, 153 transitions, 1467 flow [2022-11-16 11:36:54,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1467, PETRI_PLACES=163, PETRI_TRANSITIONS=153} [2022-11-16 11:36:54,184 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 92 predicate places. [2022-11-16 11:36:54,184 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 153 transitions, 1467 flow [2022-11-16 11:36:54,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.8421052631579) internal successors, (1023), 19 states have internal predecessors, (1023), 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) [2022-11-16 11:36:54,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:36:54,185 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:54,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:54,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:36:54,392 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:36:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash 670871893, now seen corresponding path program 1 times [2022-11-16 11:36:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:54,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600885506] [2022-11-16 11:36:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:54,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:55,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:55,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600885506] [2022-11-16 11:36:55,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600885506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:55,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002387184] [2022-11-16 11:36:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:55,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:55,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:55,550 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:55,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:36:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:36:55,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:01,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:08,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002387184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:08,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:08,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 37 [2022-11-16 11:37:08,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285009037] [2022-11-16 11:37:08,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:08,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:37:08,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:37:08,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1143, Unknown=3, NotChecked=0, Total=1332 [2022-11-16 11:37:08,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-16 11:37:08,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 153 transitions, 1467 flow. Second operand has 37 states, 37 states have (on average 48.648648648648646) internal successors, (1800), 37 states have internal predecessors, (1800), 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) [2022-11-16 11:37:08,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:08,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-16 11:37:08,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:21,136 INFO L130 PetriNetUnfolder]: 416/1402 cut-off events. [2022-11-16 11:37:21,136 INFO L131 PetriNetUnfolder]: For 6228/6228 co-relation queries the response was YES. [2022-11-16 11:37:21,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5247 conditions, 1402 events. 416/1402 cut-off events. For 6228/6228 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10690 event pairs, 52 based on Foata normal form. 2/1402 useless extension candidates. Maximal degree in co-relation 5209. Up to 334 conditions per place. [2022-11-16 11:37:21,148 INFO L137 encePairwiseOnDemand]: 59/80 looper letters, 132 selfloop transitions, 178 changer transitions 26/373 dead transitions. [2022-11-16 11:37:21,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 373 transitions, 3718 flow [2022-11-16 11:37:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 11:37:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-16 11:37:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2984 transitions. [2022-11-16 11:37:21,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6431034482758621 [2022-11-16 11:37:21,154 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 2984 transitions. [2022-11-16 11:37:21,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 2984 transitions. [2022-11-16 11:37:21,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:21,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 2984 transitions. [2022-11-16 11:37:21,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 51.44827586206897) internal successors, (2984), 58 states have internal predecessors, (2984), 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) [2022-11-16 11:37:21,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 80.0) internal successors, (4720), 59 states have internal predecessors, (4720), 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) [2022-11-16 11:37:21,172 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 80.0) internal successors, (4720), 59 states have internal predecessors, (4720), 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) [2022-11-16 11:37:21,172 INFO L175 Difference]: Start difference. First operand has 163 places, 153 transitions, 1467 flow. Second operand 58 states and 2984 transitions. [2022-11-16 11:37:21,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 373 transitions, 3718 flow [2022-11-16 11:37:21,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 373 transitions, 3490 flow, removed 32 selfloop flow, removed 18 redundant places. [2022-11-16 11:37:21,213 INFO L231 Difference]: Finished difference. Result has 236 places, 252 transitions, 2901 flow [2022-11-16 11:37:21,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=2901, PETRI_PLACES=236, PETRI_TRANSITIONS=252} [2022-11-16 11:37:21,215 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 165 predicate places. [2022-11-16 11:37:21,215 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 252 transitions, 2901 flow [2022-11-16 11:37:21,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 48.648648648648646) internal successors, (1800), 37 states have internal predecessors, (1800), 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) [2022-11-16 11:37:21,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:21,216 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:21,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:21,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:37:21,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1568120289, now seen corresponding path program 2 times [2022-11-16 11:37:21,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:21,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329257205] [2022-11-16 11:37:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:21,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:22,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329257205] [2022-11-16 11:37:22,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329257205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:22,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937403412] [2022-11-16 11:37:22,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:37:22,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:22,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:22,663 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:22,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:37:22,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:37:22,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:22,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:37:22,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:24,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:28,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937403412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:28,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:28,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-16 11:37:28,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805512567] [2022-11-16 11:37:28,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:28,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:37:28,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:37:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:37:28,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-16 11:37:28,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 252 transitions, 2901 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:37:28,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:28,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-16 11:37:28,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:36,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:41,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:43,176 INFO L130 PetriNetUnfolder]: 456/1582 cut-off events. [2022-11-16 11:37:43,176 INFO L131 PetriNetUnfolder]: For 11366/11366 co-relation queries the response was YES. [2022-11-16 11:37:43,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7553 conditions, 1582 events. 456/1582 cut-off events. For 11366/11366 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12533 event pairs, 62 based on Foata normal form. 1/1581 useless extension candidates. Maximal degree in co-relation 7480. Up to 389 conditions per place. [2022-11-16 11:37:43,191 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 133 selfloop transitions, 235 changer transitions 19/424 dead transitions. [2022-11-16 11:37:43,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 424 transitions, 5318 flow [2022-11-16 11:37:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 11:37:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-16 11:37:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3094 transitions. [2022-11-16 11:37:43,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6445833333333333 [2022-11-16 11:37:43,198 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3094 transitions. [2022-11-16 11:37:43,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3094 transitions. [2022-11-16 11:37:43,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:43,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3094 transitions. [2022-11-16 11:37:43,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 51.56666666666667) internal successors, (3094), 60 states have internal predecessors, (3094), 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) [2022-11-16 11:37:43,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 80.0) internal successors, (4880), 61 states have internal predecessors, (4880), 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) [2022-11-16 11:37:43,217 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 80.0) internal successors, (4880), 61 states have internal predecessors, (4880), 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) [2022-11-16 11:37:43,217 INFO L175 Difference]: Start difference. First operand has 236 places, 252 transitions, 2901 flow. Second operand 60 states and 3094 transitions. [2022-11-16 11:37:43,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 424 transitions, 5318 flow [2022-11-16 11:37:43,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 424 transitions, 4854 flow, removed 153 selfloop flow, removed 16 redundant places. [2022-11-16 11:37:43,316 INFO L231 Difference]: Finished difference. Result has 286 places, 318 transitions, 3950 flow [2022-11-16 11:37:43,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=3950, PETRI_PLACES=286, PETRI_TRANSITIONS=318} [2022-11-16 11:37:43,317 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 215 predicate places. [2022-11-16 11:37:43,317 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 318 transitions, 3950 flow [2022-11-16 11:37:43,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:37:43,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:43,319 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:43,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:43,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:37:43,524 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1651663333, now seen corresponding path program 3 times [2022-11-16 11:37:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:43,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094660028] [2022-11-16 11:37:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:44,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094660028] [2022-11-16 11:37:44,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094660028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046648469] [2022-11-16 11:37:44,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:37:44,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:44,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:44,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:44,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:37:44,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:37:44,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:37:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:46,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:50,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046648469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:50,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:50,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-16 11:37:50,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848203973] [2022-11-16 11:37:50,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:50,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:37:50,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:50,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:37:50,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:37:50,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-16 11:37:50,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 318 transitions, 3950 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:37:50,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:50,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-16 11:37:50,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:03,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:09,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:25,388 INFO L130 PetriNetUnfolder]: 670/2172 cut-off events. [2022-11-16 11:38:25,388 INFO L131 PetriNetUnfolder]: For 18338/18338 co-relation queries the response was YES. [2022-11-16 11:38:25,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11240 conditions, 2172 events. 670/2172 cut-off events. For 18338/18338 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18237 event pairs, 55 based on Foata normal form. 2/2172 useless extension candidates. Maximal degree in co-relation 11163. Up to 442 conditions per place. [2022-11-16 11:38:25,415 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 185 selfloop transitions, 457 changer transitions 32/711 dead transitions. [2022-11-16 11:38:25,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 711 transitions, 10030 flow [2022-11-16 11:38:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-16 11:38:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2022-11-16 11:38:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 6210 transitions. [2022-11-16 11:38:25,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6362704918032787 [2022-11-16 11:38:25,427 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 6210 transitions. [2022-11-16 11:38:25,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 6210 transitions. [2022-11-16 11:38:25,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:25,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 6210 transitions. [2022-11-16 11:38:25,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 50.90163934426229) internal successors, (6210), 122 states have internal predecessors, (6210), 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) [2022-11-16 11:38:25,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 80.0) internal successors, (9840), 123 states have internal predecessors, (9840), 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) [2022-11-16 11:38:25,464 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 80.0) internal successors, (9840), 123 states have internal predecessors, (9840), 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) [2022-11-16 11:38:25,464 INFO L175 Difference]: Start difference. First operand has 286 places, 318 transitions, 3950 flow. Second operand 122 states and 6210 transitions. [2022-11-16 11:38:25,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 711 transitions, 10030 flow [2022-11-16 11:38:25,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 711 transitions, 9324 flow, removed 203 selfloop flow, removed 31 redundant places. [2022-11-16 11:38:25,625 INFO L231 Difference]: Finished difference. Result has 392 places, 553 transitions, 8150 flow [2022-11-16 11:38:25,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=8150, PETRI_PLACES=392, PETRI_TRANSITIONS=553} [2022-11-16 11:38:25,626 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 321 predicate places. [2022-11-16 11:38:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 553 transitions, 8150 flow [2022-11-16 11:38:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:38:25,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:25,627 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:25,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:25,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:25,833 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1809393505, now seen corresponding path program 4 times [2022-11-16 11:38:25,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:25,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547303523] [2022-11-16 11:38:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:25,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:27,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547303523] [2022-11-16 11:38:27,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547303523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303280947] [2022-11-16 11:38:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:38:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:27,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:27,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:38:27,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:38:27,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:38:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:28,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:35,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303280947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:35,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-16 11:38:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120194353] [2022-11-16 11:38:35,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:35,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:38:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:38:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:38:35,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-16 11:38:35,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 553 transitions, 8150 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:38:35,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:35,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-16 11:38:35,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:39:04,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:39:08,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:39:17,003 INFO L130 PetriNetUnfolder]: 1009/3073 cut-off events. [2022-11-16 11:39:17,003 INFO L131 PetriNetUnfolder]: For 33150/33150 co-relation queries the response was YES. [2022-11-16 11:39:17,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18400 conditions, 3073 events. 1009/3073 cut-off events. For 33150/33150 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27479 event pairs, 87 based on Foata normal form. 3/3070 useless extension candidates. Maximal degree in co-relation 18314. Up to 698 conditions per place. [2022-11-16 11:39:17,040 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 333 selfloop transitions, 773 changer transitions 33/1176 dead transitions. [2022-11-16 11:39:17,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1176 transitions, 19413 flow [2022-11-16 11:39:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-16 11:39:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2022-11-16 11:39:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 5882 transitions. [2022-11-16 11:39:17,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6449561403508772 [2022-11-16 11:39:17,049 INFO L72 ComplementDD]: Start complementDD. Operand 114 states and 5882 transitions. [2022-11-16 11:39:17,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 5882 transitions. [2022-11-16 11:39:17,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:39:17,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 114 states and 5882 transitions. [2022-11-16 11:39:17,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 115 states, 114 states have (on average 51.59649122807018) internal successors, (5882), 114 states have internal predecessors, (5882), 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) [2022-11-16 11:39:17,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 115 states, 115 states have (on average 80.0) internal successors, (9200), 115 states have internal predecessors, (9200), 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) [2022-11-16 11:39:17,079 INFO L81 ComplementDD]: Finished complementDD. Result has 115 states, 115 states have (on average 80.0) internal successors, (9200), 115 states have internal predecessors, (9200), 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) [2022-11-16 11:39:17,079 INFO L175 Difference]: Start difference. First operand has 392 places, 553 transitions, 8150 flow. Second operand 114 states and 5882 transitions. [2022-11-16 11:39:17,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1176 transitions, 19413 flow [2022-11-16 11:39:17,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1176 transitions, 16201 flow, removed 1405 selfloop flow, removed 54 redundant places. [2022-11-16 11:39:17,515 INFO L231 Difference]: Finished difference. Result has 494 places, 951 transitions, 14685 flow [2022-11-16 11:39:17,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=6727, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=114, PETRI_FLOW=14685, PETRI_PLACES=494, PETRI_TRANSITIONS=951} [2022-11-16 11:39:17,517 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 423 predicate places. [2022-11-16 11:39:17,517 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 951 transitions, 14685 flow [2022-11-16 11:39:17,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:39:17,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:39:17,518 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:17,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:39:17,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:17,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:39:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:17,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1076844095, now seen corresponding path program 5 times [2022-11-16 11:39:17,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:17,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104583940] [2022-11-16 11:39:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:17,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:19,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:19,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104583940] [2022-11-16 11:39:19,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104583940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:39:19,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878764023] [2022-11-16 11:39:19,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:39:19,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:19,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:19,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:39:19,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:39:19,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:39:19,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:39:19,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:21,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:26,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878764023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:26,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:39:26,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-11-16 11:39:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408203118] [2022-11-16 11:39:26,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:26,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:39:26,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:39:26,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:39:26,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-16 11:39:26,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 951 transitions, 14685 flow. Second operand has 39 states, 39 states have (on average 48.61538461538461) internal successors, (1896), 39 states have internal predecessors, (1896), 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) [2022-11-16 11:39:26,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:39:26,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-16 11:39:26,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:39:33,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:39:37,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:39:39,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:08,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:23,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:25,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:27,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:43,657 WARN L233 SmtUtils]: Spent 13.45s on a formula simplification. DAG size of input: 80 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:40:56,387 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 78 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:41:29,099 WARN L233 SmtUtils]: Spent 32.47s on a formula simplification. DAG size of input: 98 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:41:34,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:50,937 WARN L233 SmtUtils]: Spent 9.07s on a formula simplification. DAG size of input: 76 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:42:25,124 WARN L233 SmtUtils]: Spent 28.15s on a formula simplification. DAG size of input: 104 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:42:31,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:42:52,523 WARN L233 SmtUtils]: Spent 18.70s on a formula simplification. DAG size of input: 99 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:43:14,300 WARN L233 SmtUtils]: Spent 19.98s on a formula simplification. DAG size of input: 106 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:43:16,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:29,650 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 91 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:43:46,069 WARN L233 SmtUtils]: Spent 9.60s on a formula simplification. DAG size of input: 82 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:01,623 WARN L233 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 92 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:14,820 WARN L233 SmtUtils]: Spent 11.55s on a formula simplification. DAG size of input: 108 DAG size of output: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:29,829 WARN L233 SmtUtils]: Spent 12.05s on a formula simplification. DAG size of input: 87 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:36,118 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 86 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:42,704 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 87 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:51,681 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 87 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:53,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:44:56,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:44:58,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:01,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:02,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:05,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:15,255 WARN L233 SmtUtils]: Spent 7.88s on a formula simplification. DAG size of input: 113 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:45:17,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:26,891 WARN L233 SmtUtils]: Spent 9.15s on a formula simplification. DAG size of input: 82 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:45:35,309 WARN L233 SmtUtils]: Spent 7.94s on a formula simplification. DAG size of input: 82 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:45:47,251 WARN L233 SmtUtils]: Spent 9.05s on a formula simplification. DAG size of input: 87 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:45:49,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:45:57,303 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 92 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:46:27,436 WARN L233 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 93 DAG size of output: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:46:30,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:32,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:33,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:34,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:56,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:46:59,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:47:46,988 WARN L233 SmtUtils]: Spent 9.96s on a formula simplification. DAG size of input: 93 DAG size of output: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:48:48,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:48:48,683 INFO L130 PetriNetUnfolder]: 1522/4553 cut-off events. [2022-11-16 11:48:48,683 INFO L131 PetriNetUnfolder]: For 59925/59925 co-relation queries the response was YES. [2022-11-16 11:48:48,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28586 conditions, 4553 events. 1522/4553 cut-off events. For 59925/59925 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 42684 event pairs, 69 based on Foata normal form. 5/4555 useless extension candidates. Maximal degree in co-relation 28466. Up to 1092 conditions per place. [2022-11-16 11:48:48,780 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 386 selfloop transitions, 1418 changer transitions 34/1875 dead transitions. [2022-11-16 11:48:48,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 1875 transitions, 31269 flow [2022-11-16 11:48:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-11-16 11:48:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2022-11-16 11:48:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 11614 transitions. [2022-11-16 11:48:48,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6367324561403509 [2022-11-16 11:48:48,804 INFO L72 ComplementDD]: Start complementDD. Operand 228 states and 11614 transitions. [2022-11-16 11:48:48,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 228 states and 11614 transitions. [2022-11-16 11:48:48,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:48,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 228 states and 11614 transitions. [2022-11-16 11:48:48,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 229 states, 228 states have (on average 50.93859649122807) internal successors, (11614), 228 states have internal predecessors, (11614), 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) [2022-11-16 11:48:48,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 229 states, 229 states have (on average 80.0) internal successors, (18320), 229 states have internal predecessors, (18320), 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) [2022-11-16 11:48:48,875 INFO L81 ComplementDD]: Finished complementDD. Result has 229 states, 229 states have (on average 80.0) internal successors, (18320), 229 states have internal predecessors, (18320), 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) [2022-11-16 11:48:48,875 INFO L175 Difference]: Start difference. First operand has 494 places, 951 transitions, 14685 flow. Second operand 228 states and 11614 transitions. [2022-11-16 11:48:48,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 1875 transitions, 31269 flow [2022-11-16 11:48:49,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 1875 transitions, 29223 flow, removed 529 selfloop flow, removed 32 redundant places. [2022-11-16 11:48:49,675 INFO L231 Difference]: Finished difference. Result has 750 places, 1556 transitions, 26568 flow [2022-11-16 11:48:49,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=13510, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=850, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=228, PETRI_FLOW=26568, PETRI_PLACES=750, PETRI_TRANSITIONS=1556} [2022-11-16 11:48:49,677 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 679 predicate places. [2022-11-16 11:48:49,677 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 1556 transitions, 26568 flow [2022-11-16 11:48:49,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 48.61538461538461) internal successors, (1896), 39 states have internal predecessors, (1896), 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) [2022-11-16 11:48:49,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:49,678 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:49,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:49,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:48:49,883 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:48:49,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1562990729, now seen corresponding path program 6 times [2022-11-16 11:48:49,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:49,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352614216] [2022-11-16 11:48:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:51,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:51,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352614216] [2022-11-16 11:48:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352614216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:51,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961946886] [2022-11-16 11:48:51,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:48:51,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:51,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:51,519 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:51,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:48:51,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 11:48:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:48:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:53,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:57,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961946886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:57,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:57,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-16 11:48:57,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416561347] [2022-11-16 11:48:57,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:57,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:48:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:48:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:48:57,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-16 11:48:57,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1556 transitions, 26568 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:48:57,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:57,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-16 11:48:57,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:49:05,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:07,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:09,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:26,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:28,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:49:44,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:04,567 INFO L130 PetriNetUnfolder]: 1871/5865 cut-off events. [2022-11-16 11:50:04,567 INFO L131 PetriNetUnfolder]: For 165761/165761 co-relation queries the response was YES. [2022-11-16 11:50:04,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45374 conditions, 5865 events. 1871/5865 cut-off events. For 165761/165761 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 59306 event pairs, 211 based on Foata normal form. 3/5837 useless extension candidates. Maximal degree in co-relation 45195. Up to 2214 conditions per place. [2022-11-16 11:50:04,684 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 962 selfloop transitions, 1286 changer transitions 22/2307 dead transitions. [2022-11-16 11:50:04,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 2307 transitions, 45960 flow [2022-11-16 11:50:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-16 11:50:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2022-11-16 11:50:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 5719 transitions. [2022-11-16 11:50:04,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.63828125 [2022-11-16 11:50:04,695 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 5719 transitions. [2022-11-16 11:50:04,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 5719 transitions. [2022-11-16 11:50:04,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:50:04,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 5719 transitions. [2022-11-16 11:50:04,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 51.0625) internal successors, (5719), 112 states have internal predecessors, (5719), 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) [2022-11-16 11:50:04,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 80.0) internal successors, (9040), 113 states have internal predecessors, (9040), 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) [2022-11-16 11:50:04,726 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 80.0) internal successors, (9040), 113 states have internal predecessors, (9040), 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) [2022-11-16 11:50:04,726 INFO L175 Difference]: Start difference. First operand has 750 places, 1556 transitions, 26568 flow. Second operand 112 states and 5719 transitions. [2022-11-16 11:50:04,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 2307 transitions, 45960 flow [2022-11-16 11:50:07,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 2307 transitions, 42618 flow, removed 1299 selfloop flow, removed 50 redundant places. [2022-11-16 11:50:07,056 INFO L231 Difference]: Finished difference. Result has 848 places, 2034 transitions, 40082 flow [2022-11-16 11:50:07,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=24490, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=837, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=40082, PETRI_PLACES=848, PETRI_TRANSITIONS=2034} [2022-11-16 11:50:07,057 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 777 predicate places. [2022-11-16 11:50:07,058 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 2034 transitions, 40082 flow [2022-11-16 11:50:07,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:50:07,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:50:07,059 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:07,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:07,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:50:07,294 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:50:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash 353180865, now seen corresponding path program 7 times [2022-11-16 11:50:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:07,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85646400] [2022-11-16 11:50:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:07,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:08,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85646400] [2022-11-16 11:50:08,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85646400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466767186] [2022-11-16 11:50:08,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:50:08,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:08,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:08,535 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:08,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:50:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:50:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:20,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466767186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:20,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:20,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-11-16 11:50:20,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146781503] [2022-11-16 11:50:20,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:20,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:50:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:50:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1289, Unknown=2, NotChecked=0, Total=1482 [2022-11-16 11:50:20,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-16 11:50:20,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 2034 transitions, 40082 flow. Second operand has 39 states, 39 states have (on average 48.58974358974359) internal successors, (1895), 39 states have internal predecessors, (1895), 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) [2022-11-16 11:50:20,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:50:20,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-16 11:50:20,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:50:32,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:50:42,139 INFO L130 PetriNetUnfolder]: 1947/6066 cut-off events. [2022-11-16 11:50:42,139 INFO L131 PetriNetUnfolder]: For 186149/186149 co-relation queries the response was YES. [2022-11-16 11:50:42,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49764 conditions, 6066 events. 1947/6066 cut-off events. For 186149/186149 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61629 event pairs, 235 based on Foata normal form. 2/6039 useless extension candidates. Maximal degree in co-relation 49561. Up to 2592 conditions per place. [2022-11-16 11:50:42,270 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 921 selfloop transitions, 1318 changer transitions 16/2292 dead transitions. [2022-11-16 11:50:42,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 2292 transitions, 49220 flow [2022-11-16 11:50:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-16 11:50:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-16 11:50:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3558 transitions. [2022-11-16 11:50:42,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6353571428571428 [2022-11-16 11:50:42,277 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3558 transitions. [2022-11-16 11:50:42,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3558 transitions. [2022-11-16 11:50:42,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:50:42,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3558 transitions. [2022-11-16 11:50:42,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 50.82857142857143) internal successors, (3558), 70 states have internal predecessors, (3558), 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) [2022-11-16 11:50:42,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 80.0) internal successors, (5680), 71 states have internal predecessors, (5680), 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) [2022-11-16 11:50:42,293 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 80.0) internal successors, (5680), 71 states have internal predecessors, (5680), 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) [2022-11-16 11:50:42,293 INFO L175 Difference]: Start difference. First operand has 848 places, 2034 transitions, 40082 flow. Second operand 70 states and 3558 transitions. [2022-11-16 11:50:42,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 2292 transitions, 49220 flow [2022-11-16 11:50:46,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 2292 transitions, 45224 flow, removed 1957 selfloop flow, removed 22 redundant places. [2022-11-16 11:50:46,314 INFO L231 Difference]: Finished difference. Result has 901 places, 2146 transitions, 43506 flow [2022-11-16 11:50:46,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=36744, PETRI_DIFFERENCE_MINUEND_PLACES=817, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=43506, PETRI_PLACES=901, PETRI_TRANSITIONS=2146} [2022-11-16 11:50:46,316 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 830 predicate places. [2022-11-16 11:50:46,316 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 2146 transitions, 43506 flow [2022-11-16 11:50:46,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 48.58974358974359) internal successors, (1895), 39 states have internal predecessors, (1895), 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) [2022-11-16 11:50:46,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:50:46,317 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:46,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:50:46,518 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:50:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash -782328725, now seen corresponding path program 8 times [2022-11-16 11:50:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:46,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988025103] [2022-11-16 11:50:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:46,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:47,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988025103] [2022-11-16 11:50:47,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988025103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:47,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620624435] [2022-11-16 11:50:47,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:50:47,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:47,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:47,886 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:47,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a67806ac-cb1e-4317-8e33-7de824fb50c3/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:50:47,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:50:47,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:50:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:50:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:49,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:52,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620624435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:52,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:52,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2022-11-16 11:50:52,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301907719] [2022-11-16 11:50:52,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:52,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:50:52,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:50:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:50:52,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2022-11-16 11:50:52,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 901 places, 2146 transitions, 43506 flow. Second operand has 38 states, 38 states have (on average 48.63157894736842) internal successors, (1848), 38 states have internal predecessors, (1848), 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) [2022-11-16 11:50:52,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:50:52,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2022-11-16 11:50:52,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:51:01,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:51:14,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:51:20,919 INFO L130 PetriNetUnfolder]: 1991/6214 cut-off events. [2022-11-16 11:51:20,919 INFO L131 PetriNetUnfolder]: For 149391/149391 co-relation queries the response was YES. [2022-11-16 11:51:20,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50698 conditions, 6214 events. 1991/6214 cut-off events. For 149391/149391 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 63670 event pairs, 229 based on Foata normal form. 2/6193 useless extension candidates. Maximal degree in co-relation 50493. Up to 2523 conditions per place. [2022-11-16 11:51:21,026 INFO L137 encePairwiseOnDemand]: 58/80 looper letters, 875 selfloop transitions, 1424 changer transitions 17/2353 dead transitions. [2022-11-16 11:51:21,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 976 places, 2353 transitions, 51449 flow [2022-11-16 11:51:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-16 11:51:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-11-16 11:51:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4162 transitions. [2022-11-16 11:51:21,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6344512195121951 [2022-11-16 11:51:21,032 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4162 transitions. [2022-11-16 11:51:21,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4162 transitions. [2022-11-16 11:51:21,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:51:21,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4162 transitions. [2022-11-16 11:51:21,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 50.75609756097561) internal successors, (4162), 82 states have internal predecessors, (4162), 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) [2022-11-16 11:51:21,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 80.0) internal successors, (6640), 83 states have internal predecessors, (6640), 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) [2022-11-16 11:51:21,047 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 80.0) internal successors, (6640), 83 states have internal predecessors, (6640), 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) [2022-11-16 11:51:21,048 INFO L175 Difference]: Start difference. First operand has 901 places, 2146 transitions, 43506 flow. Second operand 82 states and 4162 transitions. [2022-11-16 11:51:21,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 976 places, 2353 transitions, 51449 flow