./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R --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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- 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-38b53e6 [2022-11-25 15:34:05,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:34:05,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:34:05,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:34:05,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:34:05,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:34:05,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:34:05,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:34:05,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:34:05,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:34:05,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:34:05,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:34:05,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:34:05,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:34:05,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:34:05,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:34:05,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:34:05,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:34:05,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:34:05,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:34:05,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:34:05,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:34:05,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:34:05,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:34:05,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:34:05,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:34:05,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:34:05,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:34:05,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:34:05,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:34:05,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:34:05,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:34:05,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:34:05,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:34:05,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:34:05,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:34:05,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:34:05,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:34:05,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:34:05,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:34:05,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:34:05,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:34:05,653 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:34:05,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:34:05,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:34:05,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:34:05,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:34:05,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:34:05,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:34:05,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:34:05,661 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:34:05,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:34:05,663 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:34:05,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:34:05,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:34:05,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:34:05,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:34:05,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:34:05,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:34:05,664 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:34:05,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:34:05,665 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:34:05,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:34:05,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:34:05,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:34:05,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:34:05,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:34:05,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:34:05,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:34:05,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:34:05,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:34:05,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:34:05,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:34:05,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:34:05,669 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:34:05,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:34:05,670 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-11-25 15:34:06,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:34:06,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:34:06,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:34:06,074 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:34:06,086 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:34:06,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-25 15:34:09,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:34:09,524 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:34:09,525 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-25 15:34:09,533 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/data/fdecb65cc/88787a87c8cf4e92bc0aac0a4cb4eec4/FLAGb24f8915c [2022-11-25 15:34:09,577 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/data/fdecb65cc/88787a87c8cf4e92bc0aac0a4cb4eec4 [2022-11-25 15:34:09,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:34:09,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:34:09,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:34:09,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:34:09,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:34:09,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d6afc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09, skipping insertion in model container [2022-11-25 15:34:09,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:34:09,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:34:09,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:34:09,790 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:34:09,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:34:09,797 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:34:09,805 WARN L237 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_986300df-6650-4b96-bea3-31cb732e468a/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-25 15:34:09,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:34:09,822 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:34:09,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:34:09,841 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:34:09,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:34:09,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:34:09,849 WARN L237 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_986300df-6650-4b96-bea3-31cb732e468a/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-25 15:34:09,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:34:09,870 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:34:09,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09 WrapperNode [2022-11-25 15:34:09,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:34:09,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:34:09,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:34:09,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:34:09,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,930 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-11-25 15:34:09,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:34:09,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:34:09,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:34:09,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:34:09,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,976 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:34:09,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:34:09,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:34:09,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:34:09,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (1/1) ... [2022-11-25 15:34:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:34:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:10,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:34:10,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:34:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:34:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:34:10,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:34:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:34:10,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:34:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:34:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:34:10,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:34:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:34:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:34:10,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:34:10,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:34:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:34:10,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:34:10,095 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:34:10,217 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:34:10,219 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:34:10,509 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:34:10,645 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:34:10,645 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 15:34:10,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:34:10 BoogieIcfgContainer [2022-11-25 15:34:10,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:34:10,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:34:10,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:34:10,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:34:10,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:34:09" (1/3) ... [2022-11-25 15:34:10,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b799f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:34:10, skipping insertion in model container [2022-11-25 15:34:10,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:34:09" (2/3) ... [2022-11-25 15:34:10,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b799f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:34:10, skipping insertion in model container [2022-11-25 15:34:10,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:34:10" (3/3) ... [2022-11-25 15:34:10,663 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-11-25 15:34:10,692 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:34:10,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:34:10,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:34:10,704 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:34:10,833 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:34:10,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-11-25 15:34:10,973 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-11-25 15:34:10,974 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:34:10,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-25 15:34:10,980 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-11-25 15:34:10,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-11-25 15:34:10,988 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:34:11,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 164 flow [2022-11-25 15:34:11,008 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 164 flow [2022-11-25 15:34:11,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 164 flow [2022-11-25 15:34:11,036 INFO L130 PetriNetUnfolder]: 6/76 cut-off events. [2022-11-25 15:34:11,037 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:34:11,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-25 15:34:11,039 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2022-11-25 15:34:14,268 INFO L134 LiptonReduction]: Checked pairs total: 555 [2022-11-25 15:34:14,269 INFO L136 LiptonReduction]: Total number of compositions: 71 [2022-11-25 15:34:14,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:34:14,322 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;@12b87544, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:34:14,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 15:34:14,335 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-11-25 15:34:14,335 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:34:14,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:14,336 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:14,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1522624316, now seen corresponding path program 1 times [2022-11-25 15:34:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426763224] [2022-11-25 15:34:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:14,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426763224] [2022-11-25 15:34:14,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426763224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:14,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:14,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072092279] [2022-11-25 15:34:14,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:14,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:14,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:14,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2022-11-25 15:34:14,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2022-11-25 15:34:14,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:14,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2022-11-25 15:34:14,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:15,065 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-11-25 15:34:15,066 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 15:34:15,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 259 event pairs, 13 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2022-11-25 15:34:15,071 INFO L137 encePairwiseOnDemand]: 154/158 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-11-25 15:34:15,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2022-11-25 15:34:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2022-11-25 15:34:15,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5253164556962026 [2022-11-25 15:34:15,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2022-11-25 15:34:15,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2022-11-25 15:34:15,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:15,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2022-11-25 15:34:15,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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) [2022-11-25 15:34:15,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-25 15:34:15,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-25 15:34:15,140 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 249 transitions. [2022-11-25 15:34:15,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2022-11-25 15:34:15,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 15:34:15,146 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2022-11-25 15:34:15,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2022-11-25 15:34:15,154 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-11-25 15:34:15,155 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2022-11-25 15:34:15,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2022-11-25 15:34:15,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:15,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:15,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:34:15,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash -4778095, now seen corresponding path program 1 times [2022-11-25 15:34:15,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:15,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727104569] [2022-11-25 15:34:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:15,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:15,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727104569] [2022-11-25 15:34:15,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727104569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:15,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:15,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:34:15,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163506950] [2022-11-25 15:34:15,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:15,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:34:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:34:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:34:15,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 158 [2022-11-25 15:34:15,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 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) [2022-11-25 15:34:15,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:15,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 158 [2022-11-25 15:34:15,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:15,756 INFO L130 PetriNetUnfolder]: 72/149 cut-off events. [2022-11-25 15:34:15,757 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 15:34:15,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 149 events. 72/149 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 472 event pairs, 24 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2022-11-25 15:34:15,758 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2022-11-25 15:34:15,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 178 flow [2022-11-25 15:34:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:34:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:34:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 377 transitions. [2022-11-25 15:34:15,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4772151898734177 [2022-11-25 15:34:15,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 377 transitions. [2022-11-25 15:34:15,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 377 transitions. [2022-11-25 15:34:15,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:15,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 377 transitions. [2022-11-25 15:34:15,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 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) [2022-11-25 15:34:15,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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) [2022-11-25 15:34:15,767 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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) [2022-11-25 15:34:15,767 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 377 transitions. [2022-11-25 15:34:15,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 178 flow [2022-11-25 15:34:15,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:15,769 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 74 flow [2022-11-25 15:34:15,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2022-11-25 15:34:15,770 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-11-25 15:34:15,770 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 74 flow [2022-11-25 15:34:15,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 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) [2022-11-25 15:34:15,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:15,771 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:15,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:34:15,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash 450447045, now seen corresponding path program 2 times [2022-11-25 15:34:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:15,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132308902] [2022-11-25 15:34:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:15,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:15,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:15,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132308902] [2022-11-25 15:34:15,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132308902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:15,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691474650] [2022-11-25 15:34:15,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:34:15,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:15,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:15,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:34:16,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:34:16,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:16,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:34:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:16,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:16,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691474650] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:16,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:34:16,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-11-25 15:34:16,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195565382] [2022-11-25 15:34:16,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:16,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:34:16,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:34:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:34:16,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 158 [2022-11-25 15:34:16,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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) [2022-11-25 15:34:16,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:16,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 158 [2022-11-25 15:34:16,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:16,464 INFO L130 PetriNetUnfolder]: 72/143 cut-off events. [2022-11-25 15:34:16,464 INFO L131 PetriNetUnfolder]: For 144/148 co-relation queries the response was YES. [2022-11-25 15:34:16,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 143 events. 72/143 cut-off events. For 144/148 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 426 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 112. Up to 86 conditions per place. [2022-11-25 15:34:16,467 INFO L137 encePairwiseOnDemand]: 154/158 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2022-11-25 15:34:16,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 188 flow [2022-11-25 15:34:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:34:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:34:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2022-11-25 15:34:16,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4920886075949367 [2022-11-25 15:34:16,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2022-11-25 15:34:16,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2022-11-25 15:34:16,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:16,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2022-11-25 15:34:16,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 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) [2022-11-25 15:34:16,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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) [2022-11-25 15:34:16,475 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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) [2022-11-25 15:34:16,475 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 74 flow. Second operand 4 states and 311 transitions. [2022-11-25 15:34:16,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 188 flow [2022-11-25 15:34:16,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:16,478 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2022-11-25 15:34:16,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2022-11-25 15:34:16,479 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2022-11-25 15:34:16,479 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2022-11-25 15:34:16,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 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) [2022-11-25 15:34:16,480 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:16,480 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:16,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:16,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:16,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash 430243075, now seen corresponding path program 3 times [2022-11-25 15:34:16,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:16,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924775733] [2022-11-25 15:34:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:16,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924775733] [2022-11-25 15:34:16,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924775733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:16,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067715621] [2022-11-25 15:34:16,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:34:16,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:16,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:16,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:16,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:34:16,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:34:16,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:34:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:17,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:17,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067715621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:17,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:17,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-25 15:34:17,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764406795] [2022-11-25 15:34:17,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:17,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:34:17,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:34:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:34:17,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:17,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 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) [2022-11-25 15:34:17,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:17,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:17,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:17,466 INFO L130 PetriNetUnfolder]: 102/203 cut-off events. [2022-11-25 15:34:17,466 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2022-11-25 15:34:17,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 203 events. 102/203 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 703 event pairs, 30 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 104 conditions per place. [2022-11-25 15:34:17,475 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 33 selfloop transitions, 11 changer transitions 11/55 dead transitions. [2022-11-25 15:34:17,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 334 flow [2022-11-25 15:34:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:34:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:34:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 522 transitions. [2022-11-25 15:34:17,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4719710669077758 [2022-11-25 15:34:17,479 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 522 transitions. [2022-11-25 15:34:17,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 522 transitions. [2022-11-25 15:34:17,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:17,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 522 transitions. [2022-11-25 15:34:17,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 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) [2022-11-25 15:34:17,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 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) [2022-11-25 15:34:17,488 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 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) [2022-11-25 15:34:17,489 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 7 states and 522 transitions. [2022-11-25 15:34:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 334 flow [2022-11-25 15:34:17,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:17,497 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 165 flow [2022-11-25 15:34:17,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2022-11-25 15:34:17,499 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2022-11-25 15:34:17,500 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 165 flow [2022-11-25 15:34:17,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 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) [2022-11-25 15:34:17,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:17,501 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:17,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:17,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash 3625741, now seen corresponding path program 4 times [2022-11-25 15:34:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:17,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249804711] [2022-11-25 15:34:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:17,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:17,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:17,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249804711] [2022-11-25 15:34:17,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249804711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301023027] [2022-11-25 15:34:17,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:34:17,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:17,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:17,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:34:17,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:34:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:34:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:18,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:18,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301023027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:18,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:18,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 15:34:18,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366505776] [2022-11-25 15:34:18,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:18,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:34:18,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:34:18,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:34:18,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:18,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:18,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:18,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:18,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:18,281 INFO L130 PetriNetUnfolder]: 96/189 cut-off events. [2022-11-25 15:34:18,281 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2022-11-25 15:34:18,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 189 events. 96/189 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 629 event pairs, 28 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 486. Up to 96 conditions per place. [2022-11-25 15:34:18,283 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 25 selfloop transitions, 11 changer transitions 7/43 dead transitions. [2022-11-25 15:34:18,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 312 flow [2022-11-25 15:34:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:34:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:34:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 373 transitions. [2022-11-25 15:34:18,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47215189873417723 [2022-11-25 15:34:18,286 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 373 transitions. [2022-11-25 15:34:18,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 373 transitions. [2022-11-25 15:34:18,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:18,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 373 transitions. [2022-11-25 15:34:18,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.6) internal successors, (373), 5 states have internal predecessors, (373), 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) [2022-11-25 15:34:18,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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) [2022-11-25 15:34:18,290 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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) [2022-11-25 15:34:18,290 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 165 flow. Second operand 5 states and 373 transitions. [2022-11-25 15:34:18,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 312 flow [2022-11-25 15:34:18,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 298 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:18,295 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 179 flow [2022-11-25 15:34:18,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2022-11-25 15:34:18,296 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-11-25 15:34:18,296 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 179 flow [2022-11-25 15:34:18,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.5) internal successors, (556), 8 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:18,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:18,297 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:18,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:18,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:18,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:18,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1141294799, now seen corresponding path program 1 times [2022-11-25 15:34:18,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:18,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568918104] [2022-11-25 15:34:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:18,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:18,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:18,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568918104] [2022-11-25 15:34:18,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568918104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961323591] [2022-11-25 15:34:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:18,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:18,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:18,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:18,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:34:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:18,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:34:18,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:18,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:19,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961323591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:19,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:19,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:34:19,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092578657] [2022-11-25 15:34:19,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:19,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:34:19,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:34:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:34:19,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 158 [2022-11-25 15:34:19,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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) [2022-11-25 15:34:19,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:19,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 158 [2022-11-25 15:34:19,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:19,231 INFO L130 PetriNetUnfolder]: 126/245 cut-off events. [2022-11-25 15:34:19,231 INFO L131 PetriNetUnfolder]: For 495/511 co-relation queries the response was YES. [2022-11-25 15:34:19,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 245 events. 126/245 cut-off events. For 495/511 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 884 event pairs, 12 based on Foata normal form. 17/257 useless extension candidates. Maximal degree in co-relation 699. Up to 111 conditions per place. [2022-11-25 15:34:19,233 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 33 selfloop transitions, 13 changer transitions 7/56 dead transitions. [2022-11-25 15:34:19,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 404 flow [2022-11-25 15:34:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:34:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:34:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2022-11-25 15:34:19,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49746835443037973 [2022-11-25 15:34:19,236 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 393 transitions. [2022-11-25 15:34:19,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 393 transitions. [2022-11-25 15:34:19,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:19,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 393 transitions. [2022-11-25 15:34:19,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 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) [2022-11-25 15:34:19,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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) [2022-11-25 15:34:19,241 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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) [2022-11-25 15:34:19,241 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 179 flow. Second operand 5 states and 393 transitions. [2022-11-25 15:34:19,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 404 flow [2022-11-25 15:34:19,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 361 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-11-25 15:34:19,244 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 257 flow [2022-11-25 15:34:19,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2022-11-25 15:34:19,246 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2022-11-25 15:34:19,246 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 257 flow [2022-11-25 15:34:19,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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) [2022-11-25 15:34:19,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:19,247 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:19,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:19,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 15:34:19,454 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1432696328, now seen corresponding path program 2 times [2022-11-25 15:34:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:19,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244849992] [2022-11-25 15:34:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:19,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244849992] [2022-11-25 15:34:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244849992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:19,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899179919] [2022-11-25 15:34:19,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:34:19,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:19,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:19,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:19,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:34:19,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:34:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:19,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:19,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899179919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:20,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:20,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-25 15:34:20,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977518373] [2022-11-25 15:34:20,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:20,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:34:20,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:34:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:34:20,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:20,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 257 flow. Second operand has 14 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 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) [2022-11-25 15:34:20,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:20,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:20,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:21,439 INFO L130 PetriNetUnfolder]: 353/729 cut-off events. [2022-11-25 15:34:21,439 INFO L131 PetriNetUnfolder]: For 1335/1335 co-relation queries the response was YES. [2022-11-25 15:34:21,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2583 conditions, 729 events. 353/729 cut-off events. For 1335/1335 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3770 event pairs, 10 based on Foata normal form. 16/745 useless extension candidates. Maximal degree in co-relation 1452. Up to 239 conditions per place. [2022-11-25 15:34:21,446 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 110 selfloop transitions, 63 changer transitions 44/217 dead transitions. [2022-11-25 15:34:21,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 217 transitions, 1578 flow [2022-11-25 15:34:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 15:34:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-25 15:34:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2334 transitions. [2022-11-25 15:34:21,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46162974683544306 [2022-11-25 15:34:21,455 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2334 transitions. [2022-11-25 15:34:21,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2334 transitions. [2022-11-25 15:34:21,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:21,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2334 transitions. [2022-11-25 15:34:21,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 72.9375) internal successors, (2334), 32 states have internal predecessors, (2334), 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) [2022-11-25 15:34:21,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 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) [2022-11-25 15:34:21,475 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 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) [2022-11-25 15:34:21,475 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 257 flow. Second operand 32 states and 2334 transitions. [2022-11-25 15:34:21,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 217 transitions, 1578 flow [2022-11-25 15:34:21,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 217 transitions, 1531 flow, removed 21 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:21,511 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 896 flow [2022-11-25 15:34:21,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=896, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2022-11-25 15:34:21,512 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-11-25 15:34:21,512 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 896 flow [2022-11-25 15:34:21,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.07142857142857) internal successors, (967), 14 states have internal predecessors, (967), 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) [2022-11-25 15:34:21,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:21,513 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:21,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:21,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:21,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash -242961912, now seen corresponding path program 3 times [2022-11-25 15:34:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253184466] [2022-11-25 15:34:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:21,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:21,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253184466] [2022-11-25 15:34:21,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253184466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:21,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124582987] [2022-11-25 15:34:21,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:34:21,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:21,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:21,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:21,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:34:22,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:34:22,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:22,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:22,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:22,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124582987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:22,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:22,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-11-25 15:34:22,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455149695] [2022-11-25 15:34:22,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:22,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:34:22,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:34:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:34:22,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:22,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 896 flow. Second operand has 12 states, 12 states have (on average 69.16666666666667) internal successors, (830), 12 states have internal predecessors, (830), 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) [2022-11-25 15:34:22,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:22,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:22,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:22,832 INFO L130 PetriNetUnfolder]: 319/640 cut-off events. [2022-11-25 15:34:22,832 INFO L131 PetriNetUnfolder]: For 3917/3917 co-relation queries the response was YES. [2022-11-25 15:34:22,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3313 conditions, 640 events. 319/640 cut-off events. For 3917/3917 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3115 event pairs, 31 based on Foata normal form. 18/658 useless extension candidates. Maximal degree in co-relation 2852. Up to 294 conditions per place. [2022-11-25 15:34:22,838 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 103 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2022-11-25 15:34:22,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 138 transitions, 1515 flow [2022-11-25 15:34:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:34:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:34:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 739 transitions. [2022-11-25 15:34:22,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46772151898734177 [2022-11-25 15:34:22,842 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 739 transitions. [2022-11-25 15:34:22,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 739 transitions. [2022-11-25 15:34:22,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:22,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 739 transitions. [2022-11-25 15:34:22,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.9) internal successors, (739), 10 states have internal predecessors, (739), 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) [2022-11-25 15:34:22,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 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) [2022-11-25 15:34:22,849 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 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) [2022-11-25 15:34:22,849 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 896 flow. Second operand 10 states and 739 transitions. [2022-11-25 15:34:22,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 138 transitions, 1515 flow [2022-11-25 15:34:22,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 138 transitions, 1203 flow, removed 121 selfloop flow, removed 6 redundant places. [2022-11-25 15:34:22,872 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 849 flow [2022-11-25 15:34:22,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=849, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2022-11-25 15:34:22,873 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2022-11-25 15:34:22,874 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 849 flow [2022-11-25 15:34:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.16666666666667) internal successors, (830), 12 states have internal predecessors, (830), 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) [2022-11-25 15:34:22,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:22,875 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:22,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 15:34:23,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:23,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1558384364, now seen corresponding path program 4 times [2022-11-25 15:34:23,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:23,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833642901] [2022-11-25 15:34:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:23,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:23,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833642901] [2022-11-25 15:34:23,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833642901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614750817] [2022-11-25 15:34:23,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:34:23,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:23,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:23,319 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:23,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:34:23,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:34:23,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:23,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:23,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:23,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614750817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:23,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:23,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-25 15:34:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120057709] [2022-11-25 15:34:23,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:23,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:34:23,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:34:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:34:23,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:23,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 849 flow. Second operand has 14 states, 14 states have (on average 69.14285714285714) internal successors, (968), 14 states have internal predecessors, (968), 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) [2022-11-25 15:34:23,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:23,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:23,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:24,624 INFO L130 PetriNetUnfolder]: 403/794 cut-off events. [2022-11-25 15:34:24,624 INFO L131 PetriNetUnfolder]: For 8270/8270 co-relation queries the response was YES. [2022-11-25 15:34:24,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4140 conditions, 794 events. 403/794 cut-off events. For 8270/8270 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4072 event pairs, 39 based on Foata normal form. 48/842 useless extension candidates. Maximal degree in co-relation 3656. Up to 350 conditions per place. [2022-11-25 15:34:24,633 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 126 selfloop transitions, 66 changer transitions 0/192 dead transitions. [2022-11-25 15:34:24,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 192 transitions, 1890 flow [2022-11-25 15:34:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:34:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:34:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1321 transitions. [2022-11-25 15:34:24,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46448663853727146 [2022-11-25 15:34:24,638 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1321 transitions. [2022-11-25 15:34:24,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1321 transitions. [2022-11-25 15:34:24,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:24,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1321 transitions. [2022-11-25 15:34:24,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 73.38888888888889) internal successors, (1321), 18 states have internal predecessors, (1321), 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) [2022-11-25 15:34:24,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 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) [2022-11-25 15:34:24,648 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 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) [2022-11-25 15:34:24,649 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 849 flow. Second operand 18 states and 1321 transitions. [2022-11-25 15:34:24,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 192 transitions, 1890 flow [2022-11-25 15:34:24,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 192 transitions, 1743 flow, removed 55 selfloop flow, removed 4 redundant places. [2022-11-25 15:34:24,709 INFO L231 Difference]: Finished difference. Result has 100 places, 128 transitions, 1352 flow [2022-11-25 15:34:24,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1352, PETRI_PLACES=100, PETRI_TRANSITIONS=128} [2022-11-25 15:34:24,711 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-11-25 15:34:24,711 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 128 transitions, 1352 flow [2022-11-25 15:34:24,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.14285714285714) internal successors, (968), 14 states have internal predecessors, (968), 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) [2022-11-25 15:34:24,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:24,712 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:24,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:24,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:24,921 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash 974157938, now seen corresponding path program 5 times [2022-11-25 15:34:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:24,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794185931] [2022-11-25 15:34:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:24,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:25,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:25,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794185931] [2022-11-25 15:34:25,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794185931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:25,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856746291] [2022-11-25 15:34:25,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:34:25,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:25,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:25,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:25,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:34:25,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:34:25,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:25,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:34:25,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:25,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:25,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856746291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:25,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:25,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-25 15:34:25,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3314558] [2022-11-25 15:34:25,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:25,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:34:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:34:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:34:25,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:25,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 128 transitions, 1352 flow. Second operand has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 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) [2022-11-25 15:34:25,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:25,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:25,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:26,474 INFO L130 PetriNetUnfolder]: 486/967 cut-off events. [2022-11-25 15:34:26,474 INFO L131 PetriNetUnfolder]: For 17713/17713 co-relation queries the response was YES. [2022-11-25 15:34:26,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6002 conditions, 967 events. 486/967 cut-off events. For 17713/17713 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5296 event pairs, 22 based on Foata normal form. 30/997 useless extension candidates. Maximal degree in co-relation 5438. Up to 278 conditions per place. [2022-11-25 15:34:26,487 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 88 selfloop transitions, 105 changer transitions 5/198 dead transitions. [2022-11-25 15:34:26,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 198 transitions, 2271 flow [2022-11-25 15:34:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:34:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 15:34:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 951 transitions. [2022-11-25 15:34:26,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46299902629016554 [2022-11-25 15:34:26,492 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 951 transitions. [2022-11-25 15:34:26,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 951 transitions. [2022-11-25 15:34:26,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:26,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 951 transitions. [2022-11-25 15:34:26,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 73.15384615384616) internal successors, (951), 13 states have internal predecessors, (951), 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) [2022-11-25 15:34:26,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 158.0) internal successors, (2212), 14 states have internal predecessors, (2212), 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) [2022-11-25 15:34:26,501 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 158.0) internal successors, (2212), 14 states have internal predecessors, (2212), 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) [2022-11-25 15:34:26,501 INFO L175 Difference]: Start difference. First operand has 100 places, 128 transitions, 1352 flow. Second operand 13 states and 951 transitions. [2022-11-25 15:34:26,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 198 transitions, 2271 flow [2022-11-25 15:34:26,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 198 transitions, 1997 flow, removed 103 selfloop flow, removed 7 redundant places. [2022-11-25 15:34:26,583 INFO L231 Difference]: Finished difference. Result has 111 places, 153 transitions, 1800 flow [2022-11-25 15:34:26,584 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1800, PETRI_PLACES=111, PETRI_TRANSITIONS=153} [2022-11-25 15:34:26,584 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2022-11-25 15:34:26,584 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 153 transitions, 1800 flow [2022-11-25 15:34:26,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 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) [2022-11-25 15:34:26,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:26,585 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:26,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:26,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:34:26,802 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:26,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1855990924, now seen corresponding path program 6 times [2022-11-25 15:34:26,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:26,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497029946] [2022-11-25 15:34:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:26,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497029946] [2022-11-25 15:34:26,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497029946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645589986] [2022-11-25 15:34:26,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:34:26,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:26,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:26,992 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:27,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:34:27,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 15:34:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:27,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:27,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:27,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645589986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:27,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:27,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-25 15:34:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122371722] [2022-11-25 15:34:27,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:27,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:34:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:34:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:34:27,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:27,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 153 transitions, 1800 flow. Second operand has 15 states, 15 states have (on average 69.33333333333333) internal successors, (1040), 15 states have internal predecessors, (1040), 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) [2022-11-25 15:34:27,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:27,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:27,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:28,859 INFO L130 PetriNetUnfolder]: 725/1434 cut-off events. [2022-11-25 15:34:28,859 INFO L131 PetriNetUnfolder]: For 40367/40367 co-relation queries the response was YES. [2022-11-25 15:34:28,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10044 conditions, 1434 events. 725/1434 cut-off events. For 40367/40367 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8745 event pairs, 176 based on Foata normal form. 100/1534 useless extension candidates. Maximal degree in co-relation 9425. Up to 832 conditions per place. [2022-11-25 15:34:28,877 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 209 selfloop transitions, 125 changer transitions 3/337 dead transitions. [2022-11-25 15:34:28,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 337 transitions, 4373 flow [2022-11-25 15:34:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:34:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:34:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1763 transitions. [2022-11-25 15:34:28,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46492616033755274 [2022-11-25 15:34:28,884 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1763 transitions. [2022-11-25 15:34:28,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1763 transitions. [2022-11-25 15:34:28,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:28,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1763 transitions. [2022-11-25 15:34:28,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 73.45833333333333) internal successors, (1763), 24 states have internal predecessors, (1763), 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) [2022-11-25 15:34:28,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 158.0) internal successors, (3950), 25 states have internal predecessors, (3950), 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) [2022-11-25 15:34:28,905 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 158.0) internal successors, (3950), 25 states have internal predecessors, (3950), 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) [2022-11-25 15:34:28,906 INFO L175 Difference]: Start difference. First operand has 111 places, 153 transitions, 1800 flow. Second operand 24 states and 1763 transitions. [2022-11-25 15:34:28,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 337 transitions, 4373 flow [2022-11-25 15:34:29,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 337 transitions, 3982 flow, removed 178 selfloop flow, removed 5 redundant places. [2022-11-25 15:34:29,130 INFO L231 Difference]: Finished difference. Result has 142 places, 223 transitions, 3169 flow [2022-11-25 15:34:29,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3169, PETRI_PLACES=142, PETRI_TRANSITIONS=223} [2022-11-25 15:34:29,131 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2022-11-25 15:34:29,131 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 223 transitions, 3169 flow [2022-11-25 15:34:29,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.33333333333333) internal successors, (1040), 15 states have internal predecessors, (1040), 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) [2022-11-25 15:34:29,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:29,132 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:29,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:29,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:29,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:29,339 INFO L85 PathProgramCache]: Analyzing trace with hash 516264932, now seen corresponding path program 7 times [2022-11-25 15:34:29,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:29,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448084137] [2022-11-25 15:34:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:29,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448084137] [2022-11-25 15:34:29,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448084137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307145237] [2022-11-25 15:34:29,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:34:29,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:29,540 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:29,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:34:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:29,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:29,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307145237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:29,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:29,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-25 15:34:29,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746002593] [2022-11-25 15:34:29,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:29,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:34:29,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:29,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:34:29,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:34:29,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:29,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 223 transitions, 3169 flow. Second operand has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 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) [2022-11-25 15:34:29,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:29,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:29,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:31,273 INFO L130 PetriNetUnfolder]: 860/1731 cut-off events. [2022-11-25 15:34:31,273 INFO L131 PetriNetUnfolder]: For 62405/62405 co-relation queries the response was YES. [2022-11-25 15:34:31,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13820 conditions, 1731 events. 860/1731 cut-off events. For 62405/62405 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11057 event pairs, 87 based on Foata normal form. 16/1747 useless extension candidates. Maximal degree in co-relation 12865. Up to 542 conditions per place. [2022-11-25 15:34:31,302 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 157 selfloop transitions, 182 changer transitions 5/344 dead transitions. [2022-11-25 15:34:31,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 344 transitions, 5675 flow [2022-11-25 15:34:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 15:34:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 15:34:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1592 transitions. [2022-11-25 15:34:31,308 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4579976985040276 [2022-11-25 15:34:31,308 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1592 transitions. [2022-11-25 15:34:31,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1592 transitions. [2022-11-25 15:34:31,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:31,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1592 transitions. [2022-11-25 15:34:31,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.36363636363636) internal successors, (1592), 22 states have internal predecessors, (1592), 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) [2022-11-25 15:34:31,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 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) [2022-11-25 15:34:31,323 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 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) [2022-11-25 15:34:31,323 INFO L175 Difference]: Start difference. First operand has 142 places, 223 transitions, 3169 flow. Second operand 22 states and 1592 transitions. [2022-11-25 15:34:31,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 344 transitions, 5675 flow [2022-11-25 15:34:31,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 344 transitions, 5002 flow, removed 301 selfloop flow, removed 8 redundant places. [2022-11-25 15:34:31,648 INFO L231 Difference]: Finished difference. Result has 164 places, 272 transitions, 4159 flow [2022-11-25 15:34:31,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4159, PETRI_PLACES=164, PETRI_TRANSITIONS=272} [2022-11-25 15:34:31,650 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2022-11-25 15:34:31,650 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 272 transitions, 4159 flow [2022-11-25 15:34:31,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 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) [2022-11-25 15:34:31,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:31,651 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:31,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:31,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 15:34:31,857 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash 542781270, now seen corresponding path program 8 times [2022-11-25 15:34:31,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:31,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093365778] [2022-11-25 15:34:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:31,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:32,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093365778] [2022-11-25 15:34:32,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093365778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:32,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319732040] [2022-11-25 15:34:32,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:34:32,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:32,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:32,027 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:32,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:34:32,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:34:32,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:32,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:32,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:32,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:32,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319732040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:32,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:32,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-11-25 15:34:32,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323972191] [2022-11-25 15:34:32,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:32,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:34:32,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:34:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:34:32,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:32,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 272 transitions, 4159 flow. Second operand has 15 states, 15 states have (on average 68.93333333333334) internal successors, (1034), 15 states have internal predecessors, (1034), 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) [2022-11-25 15:34:32,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:32,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:32,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:33,564 INFO L130 PetriNetUnfolder]: 828/1658 cut-off events. [2022-11-25 15:34:33,564 INFO L131 PetriNetUnfolder]: For 71890/71890 co-relation queries the response was YES. [2022-11-25 15:34:33,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13261 conditions, 1658 events. 828/1658 cut-off events. For 71890/71890 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10416 event pairs, 197 based on Foata normal form. 36/1694 useless extension candidates. Maximal degree in co-relation 12739. Up to 856 conditions per place. [2022-11-25 15:34:33,594 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 154 selfloop transitions, 146 changer transitions 3/303 dead transitions. [2022-11-25 15:34:33,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 303 transitions, 4808 flow [2022-11-25 15:34:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:34:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 15:34:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 948 transitions. [2022-11-25 15:34:33,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-11-25 15:34:33,598 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 948 transitions. [2022-11-25 15:34:33,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 948 transitions. [2022-11-25 15:34:33,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:33,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 948 transitions. [2022-11-25 15:34:33,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 72.92307692307692) internal successors, (948), 13 states have internal predecessors, (948), 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) [2022-11-25 15:34:33,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 158.0) internal successors, (2212), 14 states have internal predecessors, (2212), 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) [2022-11-25 15:34:33,605 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 158.0) internal successors, (2212), 14 states have internal predecessors, (2212), 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) [2022-11-25 15:34:33,605 INFO L175 Difference]: Start difference. First operand has 164 places, 272 transitions, 4159 flow. Second operand 13 states and 948 transitions. [2022-11-25 15:34:33,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 303 transitions, 4808 flow [2022-11-25 15:34:33,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 303 transitions, 4618 flow, removed 94 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:33,981 INFO L231 Difference]: Finished difference. Result has 175 places, 265 transitions, 4248 flow [2022-11-25 15:34:33,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4248, PETRI_PLACES=175, PETRI_TRANSITIONS=265} [2022-11-25 15:34:33,983 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2022-11-25 15:34:33,983 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 265 transitions, 4248 flow [2022-11-25 15:34:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 68.93333333333334) internal successors, (1034), 15 states have internal predecessors, (1034), 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) [2022-11-25 15:34:33,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:33,984 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:33,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:34,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:34:34,191 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:34,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1842937726, now seen corresponding path program 9 times [2022-11-25 15:34:34,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:34,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207977974] [2022-11-25 15:34:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:34,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207977974] [2022-11-25 15:34:34,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207977974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133488471] [2022-11-25 15:34:34,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:34:34,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:34,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:34,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:34,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:34:34,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:34:34,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 15:34:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:34,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:34,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133488471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:34,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:34,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-11-25 15:34:34,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106992038] [2022-11-25 15:34:34,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:34,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:34:34,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:34:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:34:34,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 158 [2022-11-25 15:34:34,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 265 transitions, 4248 flow. Second operand has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 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) [2022-11-25 15:34:34,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:34,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 158 [2022-11-25 15:34:34,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:35,573 INFO L130 PetriNetUnfolder]: 999/2055 cut-off events. [2022-11-25 15:34:35,573 INFO L131 PetriNetUnfolder]: For 93432/93442 co-relation queries the response was YES. [2022-11-25 15:34:35,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17580 conditions, 2055 events. 999/2055 cut-off events. For 93432/93442 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14123 event pairs, 158 based on Foata normal form. 106/2159 useless extension candidates. Maximal degree in co-relation 15524. Up to 1032 conditions per place. [2022-11-25 15:34:35,608 INFO L137 encePairwiseOnDemand]: 154/158 looper letters, 226 selfloop transitions, 99 changer transitions 54/388 dead transitions. [2022-11-25 15:34:35,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 388 transitions, 7023 flow [2022-11-25 15:34:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:34:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:34:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2022-11-25 15:34:35,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.520253164556962 [2022-11-25 15:34:35,610 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 411 transitions. [2022-11-25 15:34:35,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 411 transitions. [2022-11-25 15:34:35,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:35,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 411 transitions. [2022-11-25 15:34:35,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 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) [2022-11-25 15:34:35,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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) [2022-11-25 15:34:35,614 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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) [2022-11-25 15:34:35,614 INFO L175 Difference]: Start difference. First operand has 175 places, 265 transitions, 4248 flow. Second operand 5 states and 411 transitions. [2022-11-25 15:34:35,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 388 transitions, 7023 flow [2022-11-25 15:34:36,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 388 transitions, 6709 flow, removed 36 selfloop flow, removed 14 redundant places. [2022-11-25 15:34:36,273 INFO L231 Difference]: Finished difference. Result has 167 places, 282 transitions, 4902 flow [2022-11-25 15:34:36,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4902, PETRI_PLACES=167, PETRI_TRANSITIONS=282} [2022-11-25 15:34:36,274 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2022-11-25 15:34:36,275 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 282 transitions, 4902 flow [2022-11-25 15:34:36,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 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) [2022-11-25 15:34:36,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:36,275 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:36,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 15:34:36,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:34:36,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:36,482 INFO L85 PathProgramCache]: Analyzing trace with hash 47407525, now seen corresponding path program 10 times [2022-11-25 15:34:36,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:36,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751027590] [2022-11-25 15:34:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:36,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:36,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:36,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751027590] [2022-11-25 15:34:36,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751027590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355294332] [2022-11-25 15:34:36,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:34:36,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:36,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:36,757 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:36,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:34:36,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:34:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:36,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:34:36,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:36,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:37,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355294332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:37,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:37,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-25 15:34:37,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315778024] [2022-11-25 15:34:37,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:37,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:34:37,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:34:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:34:37,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:37,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 282 transitions, 4902 flow. Second operand has 15 states, 15 states have (on average 69.2) internal successors, (1038), 15 states have internal predecessors, (1038), 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) [2022-11-25 15:34:37,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:37,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:37,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:39,436 INFO L130 PetriNetUnfolder]: 1816/3701 cut-off events. [2022-11-25 15:34:39,436 INFO L131 PetriNetUnfolder]: For 170577/170577 co-relation queries the response was YES. [2022-11-25 15:34:39,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32184 conditions, 3701 events. 1816/3701 cut-off events. For 170577/170577 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 27822 event pairs, 247 based on Foata normal form. 72/3773 useless extension candidates. Maximal degree in co-relation 27876. Up to 1432 conditions per place. [2022-11-25 15:34:39,501 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 491 selfloop transitions, 158 changer transitions 7/656 dead transitions. [2022-11-25 15:34:39,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 656 transitions, 11998 flow [2022-11-25 15:34:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:34:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 15:34:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1257 transitions. [2022-11-25 15:34:39,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.467982129560685 [2022-11-25 15:34:39,505 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1257 transitions. [2022-11-25 15:34:39,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1257 transitions. [2022-11-25 15:34:39,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:39,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1257 transitions. [2022-11-25 15:34:39,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 73.94117647058823) internal successors, (1257), 17 states have internal predecessors, (1257), 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) [2022-11-25 15:34:39,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 158.0) internal successors, (2844), 18 states have internal predecessors, (2844), 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) [2022-11-25 15:34:39,514 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 158.0) internal successors, (2844), 18 states have internal predecessors, (2844), 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) [2022-11-25 15:34:39,514 INFO L175 Difference]: Start difference. First operand has 167 places, 282 transitions, 4902 flow. Second operand 17 states and 1257 transitions. [2022-11-25 15:34:39,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 656 transitions, 11998 flow [2022-11-25 15:34:40,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 656 transitions, 11749 flow, removed 119 selfloop flow, removed 5 redundant places. [2022-11-25 15:34:40,207 INFO L231 Difference]: Finished difference. Result has 178 places, 400 transitions, 7426 flow [2022-11-25 15:34:40,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7426, PETRI_PLACES=178, PETRI_TRANSITIONS=400} [2022-11-25 15:34:40,208 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 158 predicate places. [2022-11-25 15:34:40,208 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 400 transitions, 7426 flow [2022-11-25 15:34:40,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.2) internal successors, (1038), 15 states have internal predecessors, (1038), 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) [2022-11-25 15:34:40,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:40,209 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:40,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:40,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:34:40,415 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1399399269, now seen corresponding path program 11 times [2022-11-25 15:34:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712606531] [2022-11-25 15:34:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:40,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:40,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:40,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712606531] [2022-11-25 15:34:40,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712606531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:40,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049570024] [2022-11-25 15:34:40,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:34:40,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:40,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:40,665 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:40,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:34:40,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:34:40,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:40,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:34:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:40,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:41,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049570024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:41,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:41,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 15:34:41,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598619679] [2022-11-25 15:34:41,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:41,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 15:34:41,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:41,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 15:34:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:34:41,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:41,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 400 transitions, 7426 flow. Second operand has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 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) [2022-11-25 15:34:41,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:41,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:41,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:44,491 INFO L130 PetriNetUnfolder]: 1962/3981 cut-off events. [2022-11-25 15:34:44,491 INFO L131 PetriNetUnfolder]: For 180176/180176 co-relation queries the response was YES. [2022-11-25 15:34:44,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36291 conditions, 3981 events. 1962/3981 cut-off events. For 180176/180176 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 30339 event pairs, 271 based on Foata normal form. 86/4067 useless extension candidates. Maximal degree in co-relation 32388. Up to 1498 conditions per place. [2022-11-25 15:34:44,560 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 557 selfloop transitions, 212 changer transitions 7/776 dead transitions. [2022-11-25 15:34:44,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 776 transitions, 14418 flow [2022-11-25 15:34:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 15:34:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 15:34:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2561 transitions. [2022-11-25 15:34:44,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46311030741410486 [2022-11-25 15:34:44,567 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2561 transitions. [2022-11-25 15:34:44,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2561 transitions. [2022-11-25 15:34:44,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:44,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2561 transitions. [2022-11-25 15:34:44,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.17142857142858) internal successors, (2561), 35 states have internal predecessors, (2561), 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) [2022-11-25 15:34:44,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 158.0) internal successors, (5688), 36 states have internal predecessors, (5688), 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) [2022-11-25 15:34:44,585 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 158.0) internal successors, (5688), 36 states have internal predecessors, (5688), 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) [2022-11-25 15:34:44,585 INFO L175 Difference]: Start difference. First operand has 178 places, 400 transitions, 7426 flow. Second operand 35 states and 2561 transitions. [2022-11-25 15:34:44,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 776 transitions, 14418 flow [2022-11-25 15:34:45,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 776 transitions, 13995 flow, removed 191 selfloop flow, removed 4 redundant places. [2022-11-25 15:34:45,789 INFO L231 Difference]: Finished difference. Result has 219 places, 468 transitions, 9282 flow [2022-11-25 15:34:45,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=7109, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9282, PETRI_PLACES=219, PETRI_TRANSITIONS=468} [2022-11-25 15:34:45,790 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2022-11-25 15:34:45,790 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 468 transitions, 9282 flow [2022-11-25 15:34:45,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 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) [2022-11-25 15:34:45,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:45,790 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:45,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:45,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 15:34:45,997 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:45,997 INFO L85 PathProgramCache]: Analyzing trace with hash 219183665, now seen corresponding path program 12 times [2022-11-25 15:34:45,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:45,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545842904] [2022-11-25 15:34:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:45,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:46,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545842904] [2022-11-25 15:34:46,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545842904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:46,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686653826] [2022-11-25 15:34:46,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:34:46,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:46,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:46,331 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:46,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 15:34:46,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 15:34:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:46,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:34:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:46,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:46,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686653826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:46,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:46,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-11-25 15:34:46,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998996366] [2022-11-25 15:34:46,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:46,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 15:34:46,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 15:34:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-25 15:34:47,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:47,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 468 transitions, 9282 flow. Second operand has 22 states, 22 states have (on average 68.54545454545455) internal successors, (1508), 22 states have internal predecessors, (1508), 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) [2022-11-25 15:34:47,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:47,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:47,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:52,797 INFO L130 PetriNetUnfolder]: 2426/4956 cut-off events. [2022-11-25 15:34:52,797 INFO L131 PetriNetUnfolder]: For 282824/282824 co-relation queries the response was YES. [2022-11-25 15:34:52,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49642 conditions, 4956 events. 2426/4956 cut-off events. For 282824/282824 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39782 event pairs, 114 based on Foata normal form. 38/4994 useless extension candidates. Maximal degree in co-relation 49132. Up to 1333 conditions per place. [2022-11-25 15:34:53,006 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 332 selfloop transitions, 638 changer transitions 30/1000 dead transitions. [2022-11-25 15:34:53,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1000 transitions, 21048 flow [2022-11-25 15:34:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 15:34:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-25 15:34:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4348 transitions. [2022-11-25 15:34:53,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45864978902953585 [2022-11-25 15:34:53,022 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4348 transitions. [2022-11-25 15:34:53,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4348 transitions. [2022-11-25 15:34:53,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:53,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4348 transitions. [2022-11-25 15:34:53,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 72.46666666666667) internal successors, (4348), 60 states have internal predecessors, (4348), 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) [2022-11-25 15:34:53,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 158.0) internal successors, (9638), 61 states have internal predecessors, (9638), 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) [2022-11-25 15:34:53,071 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 158.0) internal successors, (9638), 61 states have internal predecessors, (9638), 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) [2022-11-25 15:34:53,071 INFO L175 Difference]: Start difference. First operand has 219 places, 468 transitions, 9282 flow. Second operand 60 states and 4348 transitions. [2022-11-25 15:34:53,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1000 transitions, 21048 flow [2022-11-25 15:34:54,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1000 transitions, 20177 flow, removed 376 selfloop flow, removed 10 redundant places. [2022-11-25 15:34:54,848 INFO L231 Difference]: Finished difference. Result has 288 places, 752 transitions, 17069 flow [2022-11-25 15:34:54,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=8720, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=17069, PETRI_PLACES=288, PETRI_TRANSITIONS=752} [2022-11-25 15:34:54,849 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 268 predicate places. [2022-11-25 15:34:54,850 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 752 transitions, 17069 flow [2022-11-25 15:34:54,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.54545454545455) internal successors, (1508), 22 states have internal predecessors, (1508), 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) [2022-11-25 15:34:54,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:54,851 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:54,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:55,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:55,058 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash 201907233, now seen corresponding path program 13 times [2022-11-25 15:34:55,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:55,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208801907] [2022-11-25 15:34:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:55,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:55,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:55,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208801907] [2022-11-25 15:34:55,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208801907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:55,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597193661] [2022-11-25 15:34:55,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:34:55,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:55,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:55,414 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:55,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 15:34:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:55,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:34:55,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:55,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:55,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597193661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:55,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:55,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-11-25 15:34:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532389283] [2022-11-25 15:34:55,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:55,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 15:34:55,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 15:34:55,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-11-25 15:34:56,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:34:56,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 752 transitions, 17069 flow. Second operand has 22 states, 22 states have (on average 68.5909090909091) internal successors, (1509), 22 states have internal predecessors, (1509), 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) [2022-11-25 15:34:56,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:56,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:34:56,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:01,025 INFO L130 PetriNetUnfolder]: 2387/4835 cut-off events. [2022-11-25 15:35:01,026 INFO L131 PetriNetUnfolder]: For 449152/449152 co-relation queries the response was YES. [2022-11-25 15:35:01,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53253 conditions, 4835 events. 2387/4835 cut-off events. For 449152/449152 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 38352 event pairs, 208 based on Foata normal form. 108/4943 useless extension candidates. Maximal degree in co-relation 52696. Up to 1275 conditions per place. [2022-11-25 15:35:01,148 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 420 selfloop transitions, 517 changer transitions 5/942 dead transitions. [2022-11-25 15:35:01,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 942 transitions, 21447 flow [2022-11-25 15:35:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 15:35:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-25 15:35:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3212 transitions. [2022-11-25 15:35:01,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4620253164556962 [2022-11-25 15:35:01,156 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3212 transitions. [2022-11-25 15:35:01,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3212 transitions. [2022-11-25 15:35:01,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:01,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3212 transitions. [2022-11-25 15:35:01,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 73.0) internal successors, (3212), 44 states have internal predecessors, (3212), 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) [2022-11-25 15:35:01,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 158.0) internal successors, (7110), 45 states have internal predecessors, (7110), 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) [2022-11-25 15:35:01,176 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 158.0) internal successors, (7110), 45 states have internal predecessors, (7110), 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) [2022-11-25 15:35:01,176 INFO L175 Difference]: Start difference. First operand has 288 places, 752 transitions, 17069 flow. Second operand 44 states and 3212 transitions. [2022-11-25 15:35:01,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 942 transitions, 21447 flow [2022-11-25 15:35:04,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 942 transitions, 19505 flow, removed 862 selfloop flow, removed 15 redundant places. [2022-11-25 15:35:04,346 INFO L231 Difference]: Finished difference. Result has 324 places, 753 transitions, 16699 flow [2022-11-25 15:35:04,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=14767, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16699, PETRI_PLACES=324, PETRI_TRANSITIONS=753} [2022-11-25 15:35:04,348 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 304 predicate places. [2022-11-25 15:35:04,348 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 753 transitions, 16699 flow [2022-11-25 15:35:04,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.5909090909091) internal successors, (1509), 22 states have internal predecessors, (1509), 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) [2022-11-25 15:35:04,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:04,349 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:04,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:04,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 15:35:04,550 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash -653399421, now seen corresponding path program 14 times [2022-11-25 15:35:04,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:04,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949469438] [2022-11-25 15:35:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:04,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:04,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949469438] [2022-11-25 15:35:04,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949469438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132732112] [2022-11-25 15:35:04,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:35:04,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:04,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:04,836 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:04,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 15:35:04,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:35:04,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:04,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:35:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:05,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:05,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132732112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:05,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:05,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 15:35:05,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086548267] [2022-11-25 15:35:05,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:05,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:35:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:35:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:35:05,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:35:05,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 753 transitions, 16699 flow. Second operand has 17 states, 17 states have (on average 68.76470588235294) internal successors, (1169), 17 states have internal predecessors, (1169), 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) [2022-11-25 15:35:05,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:05,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:35:05,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:10,125 INFO L130 PetriNetUnfolder]: 2553/5177 cut-off events. [2022-11-25 15:35:10,125 INFO L131 PetriNetUnfolder]: For 513173/513173 co-relation queries the response was YES. [2022-11-25 15:35:10,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57631 conditions, 5177 events. 2553/5177 cut-off events. For 513173/513173 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 41589 event pairs, 303 based on Foata normal form. 112/5289 useless extension candidates. Maximal degree in co-relation 57030. Up to 1938 conditions per place. [2022-11-25 15:35:10,193 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 621 selfloop transitions, 341 changer transitions 22/984 dead transitions. [2022-11-25 15:35:10,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 984 transitions, 22045 flow [2022-11-25 15:35:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 15:35:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 15:35:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2558 transitions. [2022-11-25 15:35:10,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46256781193490054 [2022-11-25 15:35:10,200 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2558 transitions. [2022-11-25 15:35:10,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2558 transitions. [2022-11-25 15:35:10,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:10,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2558 transitions. [2022-11-25 15:35:10,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.08571428571429) internal successors, (2558), 35 states have internal predecessors, (2558), 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) [2022-11-25 15:35:10,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 158.0) internal successors, (5688), 36 states have internal predecessors, (5688), 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) [2022-11-25 15:35:10,217 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 158.0) internal successors, (5688), 36 states have internal predecessors, (5688), 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) [2022-11-25 15:35:10,217 INFO L175 Difference]: Start difference. First operand has 324 places, 753 transitions, 16699 flow. Second operand 35 states and 2558 transitions. [2022-11-25 15:35:10,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 984 transitions, 22045 flow [2022-11-25 15:35:13,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 984 transitions, 21251 flow, removed 149 selfloop flow, removed 30 redundant places. [2022-11-25 15:35:13,880 INFO L231 Difference]: Finished difference. Result has 336 places, 803 transitions, 18398 flow [2022-11-25 15:35:13,881 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=15905, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18398, PETRI_PLACES=336, PETRI_TRANSITIONS=803} [2022-11-25 15:35:13,881 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 316 predicate places. [2022-11-25 15:35:13,882 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 803 transitions, 18398 flow [2022-11-25 15:35:13,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.76470588235294) internal successors, (1169), 17 states have internal predecessors, (1169), 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) [2022-11-25 15:35:13,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:13,883 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:13,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:14,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:14,088 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:14,088 INFO L85 PathProgramCache]: Analyzing trace with hash 112893149, now seen corresponding path program 15 times [2022-11-25 15:35:14,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:14,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306123490] [2022-11-25 15:35:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:14,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:14,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:14,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306123490] [2022-11-25 15:35:14,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306123490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:14,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559229822] [2022-11-25 15:35:14,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:35:14,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:14,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:14,315 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:14,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 15:35:14,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:35:14,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:35:14,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:14,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:14,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559229822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:14,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:14,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-25 15:35:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300027693] [2022-11-25 15:35:14,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:14,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 15:35:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 15:35:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:35:14,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:35:14,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 803 transitions, 18398 flow. Second operand has 18 states, 18 states have (on average 68.77777777777777) internal successors, (1238), 18 states have internal predecessors, (1238), 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) [2022-11-25 15:35:14,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:14,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:35:14,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:20,955 INFO L130 PetriNetUnfolder]: 2980/6030 cut-off events. [2022-11-25 15:35:20,955 INFO L131 PetriNetUnfolder]: For 668375/668375 co-relation queries the response was YES. [2022-11-25 15:35:21,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70011 conditions, 6030 events. 2980/6030 cut-off events. For 668375/668375 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 49972 event pairs, 796 based on Foata normal form. 90/6120 useless extension candidates. Maximal degree in co-relation 69100. Up to 3616 conditions per place. [2022-11-25 15:35:21,033 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 662 selfloop transitions, 417 changer transitions 29/1108 dead transitions. [2022-11-25 15:35:21,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1108 transitions, 26195 flow [2022-11-25 15:35:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 15:35:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-25 15:35:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2967 transitions. [2022-11-25 15:35:21,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45801173201605433 [2022-11-25 15:35:21,039 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2967 transitions. [2022-11-25 15:35:21,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2967 transitions. [2022-11-25 15:35:21,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:21,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2967 transitions. [2022-11-25 15:35:21,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 72.36585365853658) internal successors, (2967), 41 states have internal predecessors, (2967), 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) [2022-11-25 15:35:21,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 158.0) internal successors, (6636), 42 states have internal predecessors, (6636), 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) [2022-11-25 15:35:21,059 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 158.0) internal successors, (6636), 42 states have internal predecessors, (6636), 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) [2022-11-25 15:35:21,059 INFO L175 Difference]: Start difference. First operand has 336 places, 803 transitions, 18398 flow. Second operand 41 states and 2967 transitions. [2022-11-25 15:35:21,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1108 transitions, 26195 flow [2022-11-25 15:35:25,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1108 transitions, 25506 flow, removed 159 selfloop flow, removed 14 redundant places. [2022-11-25 15:35:25,785 INFO L231 Difference]: Finished difference. Result has 375 places, 919 transitions, 22545 flow [2022-11-25 15:35:25,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=17755, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=22545, PETRI_PLACES=375, PETRI_TRANSITIONS=919} [2022-11-25 15:35:25,786 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 355 predicate places. [2022-11-25 15:35:25,787 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 919 transitions, 22545 flow [2022-11-25 15:35:25,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 68.77777777777777) internal successors, (1238), 18 states have internal predecessors, (1238), 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) [2022-11-25 15:35:25,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:25,787 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:25,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:25,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:25,988 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash -493495575, now seen corresponding path program 16 times [2022-11-25 15:35:25,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:25,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634078657] [2022-11-25 15:35:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:25,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:26,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:26,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634078657] [2022-11-25 15:35:26,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634078657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028813520] [2022-11-25 15:35:26,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:35:26,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:26,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:26,232 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 15:35:26,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:35:26,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:35:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:26,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:26,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028813520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:26,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:26,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 15:35:26,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041334128] [2022-11-25 15:35:26,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:26,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 15:35:26,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 15:35:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:35:26,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:35:26,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 919 transitions, 22545 flow. Second operand has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 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) [2022-11-25 15:35:26,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:26,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:35:26,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:32,784 INFO L130 PetriNetUnfolder]: 3401/6851 cut-off events. [2022-11-25 15:35:32,784 INFO L131 PetriNetUnfolder]: For 857710/857710 co-relation queries the response was YES. [2022-11-25 15:35:32,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84244 conditions, 6851 events. 3401/6851 cut-off events. For 857710/857710 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 57629 event pairs, 1091 based on Foata normal form. 70/6921 useless extension candidates. Maximal degree in co-relation 83062. Up to 4642 conditions per place. [2022-11-25 15:35:32,928 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 900 selfloop transitions, 326 changer transitions 1/1227 dead transitions. [2022-11-25 15:35:32,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1227 transitions, 30098 flow [2022-11-25 15:35:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 15:35:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-25 15:35:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2844 transitions. [2022-11-25 15:35:32,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-11-25 15:35:32,936 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2844 transitions. [2022-11-25 15:35:32,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2844 transitions. [2022-11-25 15:35:32,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:32,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2844 transitions. [2022-11-25 15:35:32,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 72.92307692307692) internal successors, (2844), 39 states have internal predecessors, (2844), 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) [2022-11-25 15:35:32,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 158.0) internal successors, (6320), 40 states have internal predecessors, (6320), 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) [2022-11-25 15:35:32,955 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 158.0) internal successors, (6320), 40 states have internal predecessors, (6320), 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) [2022-11-25 15:35:32,956 INFO L175 Difference]: Start difference. First operand has 375 places, 919 transitions, 22545 flow. Second operand 39 states and 2844 transitions. [2022-11-25 15:35:32,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1227 transitions, 30098 flow [2022-11-25 15:35:40,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1227 transitions, 29583 flow, removed 180 selfloop flow, removed 23 redundant places. [2022-11-25 15:35:40,299 INFO L231 Difference]: Finished difference. Result has 402 places, 1026 transitions, 26012 flow [2022-11-25 15:35:40,300 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=22048, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=26012, PETRI_PLACES=402, PETRI_TRANSITIONS=1026} [2022-11-25 15:35:40,300 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 382 predicate places. [2022-11-25 15:35:40,300 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1026 transitions, 26012 flow [2022-11-25 15:35:40,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 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) [2022-11-25 15:35:40,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:40,301 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:40,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:40,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 15:35:40,502 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash -364614735, now seen corresponding path program 17 times [2022-11-25 15:35:40,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:40,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422865013] [2022-11-25 15:35:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:40,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:40,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422865013] [2022-11-25 15:35:40,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422865013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:40,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437864646] [2022-11-25 15:35:40,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:35:40,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:40,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:40,707 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:40,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 15:35:40,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:35:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:35:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:40,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:41,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437864646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:41,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:41,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 15:35:41,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069302237] [2022-11-25 15:35:41,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:41,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:35:41,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:35:41,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:35:41,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:35:41,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1026 transitions, 26012 flow. Second operand has 17 states, 17 states have (on average 68.82352941176471) internal successors, (1170), 17 states have internal predecessors, (1170), 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) [2022-11-25 15:35:41,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:41,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:35:41,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:45,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 15:35:50,017 INFO L130 PetriNetUnfolder]: 3683/7454 cut-off events. [2022-11-25 15:35:50,017 INFO L131 PetriNetUnfolder]: For 1012442/1012442 co-relation queries the response was YES. [2022-11-25 15:35:50,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94521 conditions, 7454 events. 3683/7454 cut-off events. For 1012442/1012442 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 63801 event pairs, 1411 based on Foata normal form. 80/7534 useless extension candidates. Maximal degree in co-relation 93284. Up to 5970 conditions per place. [2022-11-25 15:35:50,129 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 973 selfloop transitions, 252 changer transitions 24/1249 dead transitions. [2022-11-25 15:35:50,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1249 transitions, 32549 flow [2022-11-25 15:35:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 15:35:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 15:35:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1975 transitions. [2022-11-25 15:35:50,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-25 15:35:50,133 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1975 transitions. [2022-11-25 15:35:50,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1975 transitions. [2022-11-25 15:35:50,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:50,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1975 transitions. [2022-11-25 15:35:50,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.14814814814815) internal successors, (1975), 27 states have internal predecessors, (1975), 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) [2022-11-25 15:35:50,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 158.0) internal successors, (4424), 28 states have internal predecessors, (4424), 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) [2022-11-25 15:35:50,148 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 158.0) internal successors, (4424), 28 states have internal predecessors, (4424), 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) [2022-11-25 15:35:50,148 INFO L175 Difference]: Start difference. First operand has 402 places, 1026 transitions, 26012 flow. Second operand 27 states and 1975 transitions. [2022-11-25 15:35:50,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1249 transitions, 32549 flow [2022-11-25 15:35:59,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1249 transitions, 31784 flow, removed 337 selfloop flow, removed 12 redundant places. [2022-11-25 15:35:59,436 INFO L231 Difference]: Finished difference. Result has 426 places, 1090 transitions, 28019 flow [2022-11-25 15:35:59,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=25203, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28019, PETRI_PLACES=426, PETRI_TRANSITIONS=1090} [2022-11-25 15:35:59,437 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 406 predicate places. [2022-11-25 15:35:59,438 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1090 transitions, 28019 flow [2022-11-25 15:35:59,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.82352941176471) internal successors, (1170), 17 states have internal predecessors, (1170), 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) [2022-11-25 15:35:59,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:59,439 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:59,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-25 15:35:59,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 15:35:59,644 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:59,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1678138587, now seen corresponding path program 18 times [2022-11-25 15:35:59,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:59,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543953928] [2022-11-25 15:35:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:59,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:59,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543953928] [2022-11-25 15:35:59,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543953928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386630409] [2022-11-25 15:35:59,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:35:59,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:59,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:59,827 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:59,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 15:35:59,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:35:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:35:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:00,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:00,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386630409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:00,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:00,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 15:36:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791691602] [2022-11-25 15:36:00,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 15:36:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:00,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 15:36:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:36:00,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:36:00,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1090 transitions, 28019 flow. Second operand has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 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) [2022-11-25 15:36:00,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:00,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:36:00,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:06,516 INFO L130 PetriNetUnfolder]: 3970/7965 cut-off events. [2022-11-25 15:36:06,516 INFO L131 PetriNetUnfolder]: For 1170570/1170570 co-relation queries the response was YES. [2022-11-25 15:36:06,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102134 conditions, 7965 events. 3970/7965 cut-off events. For 1170570/1170570 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 68490 event pairs, 1538 based on Foata normal form. 112/8077 useless extension candidates. Maximal degree in co-relation 100494. Up to 6640 conditions per place. [2022-11-25 15:36:06,681 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 1104 selfloop transitions, 271 changer transitions 4/1379 dead transitions. [2022-11-25 15:36:06,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1379 transitions, 36399 flow [2022-11-25 15:36:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 15:36:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 15:36:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2624 transitions. [2022-11-25 15:36:06,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4613220815752461 [2022-11-25 15:36:06,686 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2624 transitions. [2022-11-25 15:36:06,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2624 transitions. [2022-11-25 15:36:06,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:06,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2624 transitions. [2022-11-25 15:36:06,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 72.88888888888889) internal successors, (2624), 36 states have internal predecessors, (2624), 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) [2022-11-25 15:36:06,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 158.0) internal successors, (5846), 37 states have internal predecessors, (5846), 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) [2022-11-25 15:36:06,696 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 158.0) internal successors, (5846), 37 states have internal predecessors, (5846), 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) [2022-11-25 15:36:06,696 INFO L175 Difference]: Start difference. First operand has 426 places, 1090 transitions, 28019 flow. Second operand 36 states and 2624 transitions. [2022-11-25 15:36:06,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1379 transitions, 36399 flow [2022-11-25 15:36:17,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1379 transitions, 35793 flow, removed 230 selfloop flow, removed 11 redundant places. [2022-11-25 15:36:17,371 INFO L231 Difference]: Finished difference. Result has 464 places, 1194 transitions, 31665 flow [2022-11-25 15:36:17,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=27610, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31665, PETRI_PLACES=464, PETRI_TRANSITIONS=1194} [2022-11-25 15:36:17,372 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 444 predicate places. [2022-11-25 15:36:17,373 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1194 transitions, 31665 flow [2022-11-25 15:36:17,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.875) internal successors, (1102), 16 states have internal predecessors, (1102), 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) [2022-11-25 15:36:17,373 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:17,373 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:17,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:17,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 15:36:17,579 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:36:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash 673287541, now seen corresponding path program 19 times [2022-11-25 15:36:17,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:17,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863357190] [2022-11-25 15:36:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:17,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:17,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863357190] [2022-11-25 15:36:17,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863357190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:17,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587553971] [2022-11-25 15:36:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:36:17,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:17,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:17,755 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:17,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 15:36:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:17,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:36:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:17,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:18,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587553971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:18,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:18,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 15:36:18,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947766064] [2022-11-25 15:36:18,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:18,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 15:36:18,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 15:36:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:36:18,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:36:18,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1194 transitions, 31665 flow. Second operand has 16 states, 16 states have (on average 68.8125) internal successors, (1101), 16 states have internal predecessors, (1101), 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) [2022-11-25 15:36:18,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:18,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:36:18,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:26,138 INFO L130 PetriNetUnfolder]: 4179/8356 cut-off events. [2022-11-25 15:36:26,138 INFO L131 PetriNetUnfolder]: For 1425042/1425042 co-relation queries the response was YES. [2022-11-25 15:36:26,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110037 conditions, 8356 events. 4179/8356 cut-off events. For 1425042/1425042 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 72231 event pairs, 1715 based on Foata normal form. 156/8512 useless extension candidates. Maximal degree in co-relation 108764. Up to 7505 conditions per place. [2022-11-25 15:36:26,325 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 1217 selfloop transitions, 192 changer transitions 4/1413 dead transitions. [2022-11-25 15:36:26,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1413 transitions, 37932 flow [2022-11-25 15:36:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 15:36:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 15:36:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2620 transitions. [2022-11-25 15:36:26,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4606188466947961 [2022-11-25 15:36:26,329 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2620 transitions. [2022-11-25 15:36:26,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2620 transitions. [2022-11-25 15:36:26,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:26,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2620 transitions. [2022-11-25 15:36:26,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 72.77777777777777) internal successors, (2620), 36 states have internal predecessors, (2620), 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) [2022-11-25 15:36:26,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 158.0) internal successors, (5846), 37 states have internal predecessors, (5846), 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) [2022-11-25 15:36:26,343 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 158.0) internal successors, (5846), 37 states have internal predecessors, (5846), 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) [2022-11-25 15:36:26,343 INFO L175 Difference]: Start difference. First operand has 464 places, 1194 transitions, 31665 flow. Second operand 36 states and 2620 transitions. [2022-11-25 15:36:26,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1413 transitions, 37932 flow [2022-11-25 15:36:38,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1413 transitions, 36976 flow, removed 397 selfloop flow, removed 15 redundant places. [2022-11-25 15:36:38,497 INFO L231 Difference]: Finished difference. Result has 500 places, 1275 transitions, 33490 flow [2022-11-25 15:36:38,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=30709, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1056, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=33490, PETRI_PLACES=500, PETRI_TRANSITIONS=1275} [2022-11-25 15:36:38,499 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 480 predicate places. [2022-11-25 15:36:38,500 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 1275 transitions, 33490 flow [2022-11-25 15:36:38,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.8125) internal successors, (1101), 16 states have internal predecessors, (1101), 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) [2022-11-25 15:36:38,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:38,500 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:38,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:38,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:38,706 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:36:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2021670603, now seen corresponding path program 20 times [2022-11-25 15:36:38,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:38,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200035506] [2022-11-25 15:36:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:38,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:39,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200035506] [2022-11-25 15:36:39,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200035506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883893665] [2022-11-25 15:36:39,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:36:39,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:39,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:39,044 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:39,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 15:36:39,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:36:39,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:36:39,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:39,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:39,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883893665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:39,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:39,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-25 15:36:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311756631] [2022-11-25 15:36:39,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:39,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:36:39,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:36:39,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:36:39,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:36:39,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 1275 transitions, 33490 flow. Second operand has 21 states, 21 states have (on average 68.61904761904762) internal successors, (1441), 21 states have internal predecessors, (1441), 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) [2022-11-25 15:36:39,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:39,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:36:39,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:51,835 INFO L130 PetriNetUnfolder]: 4652/9433 cut-off events. [2022-11-25 15:36:51,835 INFO L131 PetriNetUnfolder]: For 1939775/1939775 co-relation queries the response was YES. [2022-11-25 15:36:51,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130848 conditions, 9433 events. 4652/9433 cut-off events. For 1939775/1939775 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 84566 event pairs, 869 based on Foata normal form. 66/9499 useless extension candidates. Maximal degree in co-relation 129948. Up to 3442 conditions per place. [2022-11-25 15:36:52,051 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 695 selfloop transitions, 897 changer transitions 18/1610 dead transitions. [2022-11-25 15:36:52,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1610 transitions, 44307 flow [2022-11-25 15:36:52,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 15:36:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 15:36:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2514 transitions. [2022-11-25 15:36:52,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.467982129560685 [2022-11-25 15:36:52,056 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2514 transitions. [2022-11-25 15:36:52,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2514 transitions. [2022-11-25 15:36:52,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:52,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2514 transitions. [2022-11-25 15:36:52,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 73.94117647058823) internal successors, (2514), 34 states have internal predecessors, (2514), 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) [2022-11-25 15:36:52,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 158.0) internal successors, (5530), 35 states have internal predecessors, (5530), 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) [2022-11-25 15:36:52,069 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 158.0) internal successors, (5530), 35 states have internal predecessors, (5530), 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) [2022-11-25 15:36:52,069 INFO L175 Difference]: Start difference. First operand has 500 places, 1275 transitions, 33490 flow. Second operand 34 states and 2514 transitions. [2022-11-25 15:36:52,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1610 transitions, 44307 flow [2022-11-25 15:37:10,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1610 transitions, 42573 flow, removed 773 selfloop flow, removed 13 redundant places. [2022-11-25 15:37:10,058 INFO L231 Difference]: Finished difference. Result has 535 places, 1397 transitions, 38769 flow [2022-11-25 15:37:10,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=32057, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=779, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=38769, PETRI_PLACES=535, PETRI_TRANSITIONS=1397} [2022-11-25 15:37:10,061 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 515 predicate places. [2022-11-25 15:37:10,061 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1397 transitions, 38769 flow [2022-11-25 15:37:10,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.61904761904762) internal successors, (1441), 21 states have internal predecessors, (1441), 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) [2022-11-25 15:37:10,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:37:10,062 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:37:10,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 15:37:10,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 15:37:10,270 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:37:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:37:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2004394171, now seen corresponding path program 21 times [2022-11-25 15:37:10,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:37:10,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161391792] [2022-11-25 15:37:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:37:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:37:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161391792] [2022-11-25 15:37:10,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161391792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602857289] [2022-11-25 15:37:10,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:37:10,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:10,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:10,592 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:37:10,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 15:37:10,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:37:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:37:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:37:10,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:37:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:10,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:37:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:10,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602857289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:37:10,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:37:10,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-25 15:37:10,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099864359] [2022-11-25 15:37:10,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:37:10,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:37:10,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:37:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:37:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:37:11,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:37:11,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1397 transitions, 38769 flow. Second operand has 21 states, 21 states have (on average 68.57142857142857) internal successors, (1440), 21 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) [2022-11-25 15:37:11,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:37:11,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:37:11,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:37:24,601 INFO L130 PetriNetUnfolder]: 4638/9381 cut-off events. [2022-11-25 15:37:24,601 INFO L131 PetriNetUnfolder]: For 2057741/2057741 co-relation queries the response was YES. [2022-11-25 15:37:24,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138312 conditions, 9381 events. 4638/9381 cut-off events. For 2057741/2057741 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 83829 event pairs, 342 based on Foata normal form. 22/9403 useless extension candidates. Maximal degree in co-relation 137432. Up to 2788 conditions per place. [2022-11-25 15:37:24,871 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 504 selfloop transitions, 1086 changer transitions 23/1613 dead transitions. [2022-11-25 15:37:24,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 1613 transitions, 46706 flow [2022-11-25 15:37:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 15:37:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-25 15:37:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3797 transitions. [2022-11-25 15:37:24,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4534272748984953 [2022-11-25 15:37:24,880 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3797 transitions. [2022-11-25 15:37:24,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3797 transitions. [2022-11-25 15:37:24,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:37:24,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3797 transitions. [2022-11-25 15:37:24,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 71.64150943396227) internal successors, (3797), 53 states have internal predecessors, (3797), 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) [2022-11-25 15:37:24,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 158.0) internal successors, (8532), 54 states have internal predecessors, (8532), 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) [2022-11-25 15:37:24,902 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 158.0) internal successors, (8532), 54 states have internal predecessors, (8532), 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) [2022-11-25 15:37:24,903 INFO L175 Difference]: Start difference. First operand has 535 places, 1397 transitions, 38769 flow. Second operand 53 states and 3797 transitions. [2022-11-25 15:37:24,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 1613 transitions, 46706 flow [2022-11-25 15:37:46,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 1613 transitions, 45858 flow, removed 382 selfloop flow, removed 12 redundant places. [2022-11-25 15:37:46,277 INFO L231 Difference]: Finished difference. Result has 582 places, 1448 transitions, 42299 flow [2022-11-25 15:37:46,278 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=37981, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=42299, PETRI_PLACES=582, PETRI_TRANSITIONS=1448} [2022-11-25 15:37:46,278 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2022-11-25 15:37:46,279 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 1448 transitions, 42299 flow [2022-11-25 15:37:46,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.57142857142857) internal successors, (1440), 21 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) [2022-11-25 15:37:46,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:37:46,279 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:37:46,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 15:37:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:46,480 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:37:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:37:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash -294504699, now seen corresponding path program 22 times [2022-11-25 15:37:46,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:37:46,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99928422] [2022-11-25 15:37:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:46,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:37:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:46,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:37:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99928422] [2022-11-25 15:37:46,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99928422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:46,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877118296] [2022-11-25 15:37:46,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:37:46,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:46,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:46,671 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:37:46,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 15:37:46,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:37:46,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:37:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:37:46,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:37:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:46,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:37:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:47,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877118296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:37:47,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:37:47,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 15:37:47,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058970978] [2022-11-25 15:37:47,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:37:47,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:37:47,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:37:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:37:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:37:47,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:37:47,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 1448 transitions, 42299 flow. Second operand has 17 states, 17 states have (on average 68.82352941176471) internal successors, (1170), 17 states have internal predecessors, (1170), 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) [2022-11-25 15:37:47,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:37:47,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:37:47,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:37:59,327 INFO L130 PetriNetUnfolder]: 4855/9760 cut-off events. [2022-11-25 15:37:59,327 INFO L131 PetriNetUnfolder]: For 2189511/2189511 co-relation queries the response was YES. [2022-11-25 15:37:59,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145761 conditions, 9760 events. 4855/9760 cut-off events. For 2189511/2189511 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 87002 event pairs, 1589 based on Foata normal form. 70/9830 useless extension candidates. Maximal degree in co-relation 144774. Up to 7371 conditions per place. [2022-11-25 15:37:59,688 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 1148 selfloop transitions, 481 changer transitions 21/1650 dead transitions. [2022-11-25 15:37:59,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 1650 transitions, 49847 flow [2022-11-25 15:37:59,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 15:37:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 15:37:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2114 transitions. [2022-11-25 15:37:59,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46137058053251856 [2022-11-25 15:37:59,692 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2114 transitions. [2022-11-25 15:37:59,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2114 transitions. [2022-11-25 15:37:59,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:37:59,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2114 transitions. [2022-11-25 15:37:59,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 72.89655172413794) internal successors, (2114), 29 states have internal predecessors, (2114), 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) [2022-11-25 15:37:59,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 158.0) internal successors, (4740), 30 states have internal predecessors, (4740), 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) [2022-11-25 15:37:59,699 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 158.0) internal successors, (4740), 30 states have internal predecessors, (4740), 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) [2022-11-25 15:37:59,699 INFO L175 Difference]: Start difference. First operand has 582 places, 1448 transitions, 42299 flow. Second operand 29 states and 2114 transitions. [2022-11-25 15:37:59,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 1650 transitions, 49847 flow [2022-11-25 15:38:23,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1650 transitions, 48087 flow, removed 643 selfloop flow, removed 19 redundant places. [2022-11-25 15:38:23,062 INFO L231 Difference]: Finished difference. Result has 598 places, 1522 transitions, 44828 flow [2022-11-25 15:38:23,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=40878, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=991, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=44828, PETRI_PLACES=598, PETRI_TRANSITIONS=1522} [2022-11-25 15:38:23,064 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 578 predicate places. [2022-11-25 15:38:23,064 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 1522 transitions, 44828 flow [2022-11-25 15:38:23,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.82352941176471) internal successors, (1170), 17 states have internal predecessors, (1170), 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) [2022-11-25 15:38:23,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:23,064 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:23,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:23,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 15:38:23,265 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:38:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1022657109, now seen corresponding path program 23 times [2022-11-25 15:38:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:23,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544793497] [2022-11-25 15:38:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:23,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:23,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544793497] [2022-11-25 15:38:23,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544793497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:23,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788236992] [2022-11-25 15:38:23,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:38:23,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:23,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:23,447 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:23,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 15:38:23,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:38:23,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:23,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 15:38:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:23,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:38:23,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788236992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:23,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:23,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 15:38:23,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929744022] [2022-11-25 15:38:23,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:23,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:38:23,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:38:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:38:23,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 158 [2022-11-25 15:38:23,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 1522 transitions, 44828 flow. Second operand has 12 states, 12 states have (on average 73.25) internal successors, (879), 12 states have internal predecessors, (879), 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) [2022-11-25 15:38:23,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:23,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 158 [2022-11-25 15:38:23,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:37,273 INFO L130 PetriNetUnfolder]: 6053/12237 cut-off events. [2022-11-25 15:38:37,273 INFO L131 PetriNetUnfolder]: For 2862248/2862248 co-relation queries the response was YES. [2022-11-25 15:38:37,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189615 conditions, 12237 events. 6053/12237 cut-off events. For 2862248/2862248 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 113217 event pairs, 731 based on Foata normal form. 224/12461 useless extension candidates. Maximal degree in co-relation 188469. Up to 6129 conditions per place. [2022-11-25 15:38:37,591 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 1134 selfloop transitions, 718 changer transitions 154/2008 dead transitions. [2022-11-25 15:38:37,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 2008 transitions, 63302 flow [2022-11-25 15:38:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:38:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:38:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 558 transitions. [2022-11-25 15:38:37,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5045207956600362 [2022-11-25 15:38:37,593 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 558 transitions. [2022-11-25 15:38:37,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 558 transitions. [2022-11-25 15:38:37,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:37,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 558 transitions. [2022-11-25 15:38:37,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 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) [2022-11-25 15:38:37,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 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) [2022-11-25 15:38:37,594 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 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) [2022-11-25 15:38:37,595 INFO L175 Difference]: Start difference. First operand has 598 places, 1522 transitions, 44828 flow. Second operand 7 states and 558 transitions. [2022-11-25 15:38:37,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 2008 transitions, 63302 flow [2022-11-25 15:39:11,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 2008 transitions, 62881 flow, removed 116 selfloop flow, removed 20 redundant places. [2022-11-25 15:39:11,672 INFO L231 Difference]: Finished difference. Result has 585 places, 1724 transitions, 55313 flow [2022-11-25 15:39:11,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=44279, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=55313, PETRI_PLACES=585, PETRI_TRANSITIONS=1724} [2022-11-25 15:39:11,674 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 565 predicate places. [2022-11-25 15:39:11,674 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 1724 transitions, 55313 flow [2022-11-25 15:39:11,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 73.25) internal successors, (879), 12 states have internal predecessors, (879), 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) [2022-11-25 15:39:11,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:11,675 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:11,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:11,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 15:39:11,881 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:39:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash 873277112, now seen corresponding path program 24 times [2022-11-25 15:39:11,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288991520] [2022-11-25 15:39:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:11,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288991520] [2022-11-25 15:39:12,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288991520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:12,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735373934] [2022-11-25 15:39:12,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:39:12,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:12,111 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:12,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_986300df-6650-4b96-bea3-31cb732e468a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 15:39:12,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:39:12,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 15:39:12,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:12,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:12,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735373934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:12,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:12,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-11-25 15:39:12,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112783607] [2022-11-25 15:39:12,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:39:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:39:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:39:12,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 158 [2022-11-25 15:39:12,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1724 transitions, 55313 flow. Second operand has 19 states, 19 states have (on average 68.94736842105263) internal successors, (1310), 19 states have internal predecessors, (1310), 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) [2022-11-25 15:39:12,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:12,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 158 [2022-11-25 15:39:12,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:35,711 INFO L130 PetriNetUnfolder]: 9948/20275 cut-off events. [2022-11-25 15:39:35,711 INFO L131 PetriNetUnfolder]: For 4893322/4893322 co-relation queries the response was YES. [2022-11-25 15:39:36,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315890 conditions, 20275 events. 9948/20275 cut-off events. For 4893322/4893322 co-relation queries the response was YES. Maximal size of possible extension queue 1615. Compared 202262 event pairs, 1549 based on Foata normal form. 190/20465 useless extension candidates. Maximal degree in co-relation 313750. Up to 7388 conditions per place. [2022-11-25 15:39:36,291 INFO L137 encePairwiseOnDemand]: 153/158 looper letters, 2638 selfloop transitions, 658 changer transitions 3/3299 dead transitions. [2022-11-25 15:39:36,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 3299 transitions, 108850 flow [2022-11-25 15:39:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 15:39:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 15:39:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1921 transitions. [2022-11-25 15:39:36,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46762414800389485 [2022-11-25 15:39:36,296 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1921 transitions. [2022-11-25 15:39:36,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1921 transitions. [2022-11-25 15:39:36,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:36,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1921 transitions. [2022-11-25 15:39:36,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.88461538461539) internal successors, (1921), 26 states have internal predecessors, (1921), 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) [2022-11-25 15:39:36,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 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) [2022-11-25 15:39:36,306 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 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) [2022-11-25 15:39:36,306 INFO L175 Difference]: Start difference. First operand has 585 places, 1724 transitions, 55313 flow. Second operand 26 states and 1921 transitions. [2022-11-25 15:39:36,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 3299 transitions, 108850 flow