./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro --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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- 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-8393723 [2022-11-18 18:48:32,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:48:32,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:48:32,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:48:32,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:48:32,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:48:32,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:48:32,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:48:32,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:48:32,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:48:32,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:48:32,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:48:32,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:48:32,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:48:32,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:48:32,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:48:32,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:48:32,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:48:32,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:48:32,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:48:32,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:48:32,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:48:32,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:48:32,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:48:32,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:48:32,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:48:32,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:48:32,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:48:32,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:48:32,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:48:32,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:48:32,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:48:32,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:48:32,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:48:32,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:48:32,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:48:32,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:48:32,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:48:32,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:48:32,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:48:32,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:48:32,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:48:32,668 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:48:32,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:48:32,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:48:32,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:48:32,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:48:32,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:48:32,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:48:32,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:48:32,671 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:48:32,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:48:32,672 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:48:32,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:48:32,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:48:32,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:48:32,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:48:32,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:48:32,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:48:32,674 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:48:32,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:48:32,674 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:48:32,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:48:32,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:48:32,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:48:32,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:48:32,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:48:32,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:48:32,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:48:32,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:48:32,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:48:32,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:48:32,677 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:48:32,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:48:32,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:48:32,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-11-18 18:48:32,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:48:33,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:48:33,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:48:33,024 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:48:33,025 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:48:33,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-18 18:48:33,114 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/data/9dcf41bc3/162f22007c4c4913805015b357640a1a/FLAG69974e6f0 [2022-11-18 18:48:33,634 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:48:33,635 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-18 18:48:33,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/data/9dcf41bc3/162f22007c4c4913805015b357640a1a/FLAG69974e6f0 [2022-11-18 18:48:33,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/data/9dcf41bc3/162f22007c4c4913805015b357640a1a [2022-11-18 18:48:33,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:48:33,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:48:33,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:48:33,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:48:33,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:48:33,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:48:33" (1/1) ... [2022-11-18 18:48:33,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acd8711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:33, skipping insertion in model container [2022-11-18 18:48:33,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:48:33" (1/1) ... [2022-11-18 18:48:33,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:48:34,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:48:34,269 WARN L234 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_676dd87e-0133-412a-b583-2ee9959ddfab/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-18 18:48:34,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:48:34,284 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:48:34,319 WARN L234 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_676dd87e-0133-412a-b583-2ee9959ddfab/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-18 18:48:34,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:48:34,337 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:48:34,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34 WrapperNode [2022-11-18 18:48:34,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:48:34,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:48:34,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:48:34,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:48:34,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,384 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-18 18:48:34,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:48:34,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:48:34,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:48:34,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:48:34,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,414 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:48:34,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:48:34,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:48:34,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:48:34,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (1/1) ... [2022-11-18 18:48:34,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:48:34,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:34,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:48:34,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:48:34,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:48:34,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 18:48:34,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 18:48:34,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 18:48:34,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 18:48:34,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:48:34,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:48:34,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:48:34,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 18:48:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 18:48:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:48:34,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:48:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:48:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:48:34,538 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:48:34,656 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:48:34,658 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:48:34,875 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:48:34,939 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:48:34,958 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:48:34,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:48:34 BoogieIcfgContainer [2022-11-18 18:48:34,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:48:34,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:48:34,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:48:34,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:48:34,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:48:33" (1/3) ... [2022-11-18 18:48:34,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491d33ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:48:34, skipping insertion in model container [2022-11-18 18:48:34,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:48:34" (2/3) ... [2022-11-18 18:48:34,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491d33ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:48:34, skipping insertion in model container [2022-11-18 18:48:34,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:48:34" (3/3) ... [2022-11-18 18:48:34,976 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-11-18 18:48:34,985 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:48:34,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:48:34,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:48:34,997 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:48:35,072 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:48:35,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-11-18 18:48:35,170 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2022-11-18 18:48:35,170 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:48:35,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-18 18:48:35,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-11-18 18:48:35,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-11-18 18:48:35,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:48:35,202 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;@754c294b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:48:35,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 18:48:35,229 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-11-18 18:48:35,229 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:48:35,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:35,230 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:35,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:35,237 INFO L85 PathProgramCache]: Analyzing trace with hash 456373441, now seen corresponding path program 1 times [2022-11-18 18:48:35,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:35,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939311694] [2022-11-18 18:48:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:35,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:35,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939311694] [2022-11-18 18:48:35,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939311694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:35,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:35,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:48:35,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615524391] [2022-11-18 18:48:35,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:35,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:48:35,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:35,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:48:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:48:35,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2022-11-18 18:48:35,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:35,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:35,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2022-11-18 18:48:35,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:35,675 INFO L130 PetriNetUnfolder]: 10/93 cut-off events. [2022-11-18 18:48:35,675 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-11-18 18:48:35,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-11-18 18:48:35,709 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2022-11-18 18:48:35,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2022-11-18 18:48:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:48:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:48:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-11-18 18:48:35,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2022-11-18 18:48:35,738 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-11-18 18:48:35,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-11-18 18:48:35,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:35,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-11-18 18:48:35,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:35,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:35,771 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:35,773 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2022-11-18 18:48:35,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2022-11-18 18:48:35,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 18:48:35,787 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2022-11-18 18:48:35,791 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-18 18:48:35,797 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-11-18 18:48:35,798 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2022-11-18 18:48:35,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:35,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:35,799 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:35,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:48:35,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-11-18 18:48:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476317239] [2022-11-18 18:48:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:35,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:36,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:36,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476317239] [2022-11-18 18:48:36,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476317239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:36,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:36,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:48:36,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729883664] [2022-11-18 18:48:36,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:36,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:48:36,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:36,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:48:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:48:36,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-11-18 18:48:36,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:36,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-11-18 18:48:36,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:36,478 INFO L130 PetriNetUnfolder]: 64/183 cut-off events. [2022-11-18 18:48:36,478 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:48:36,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 533 event pairs, 25 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2022-11-18 18:48:36,481 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-11-18 18:48:36,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2022-11-18 18:48:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:48:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:48:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2022-11-18 18:48:36,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2022-11-18 18:48:36,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2022-11-18 18:48:36,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2022-11-18 18:48:36,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:36,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2022-11-18 18:48:36,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,492 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,492 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2022-11-18 18:48:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2022-11-18 18:48:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:48:36,495 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2022-11-18 18:48:36,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-11-18 18:48:36,496 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2022-11-18 18:48:36,497 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2022-11-18 18:48:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:36,498 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:36,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:48:36,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:36,499 INFO L85 PathProgramCache]: Analyzing trace with hash -332340421, now seen corresponding path program 1 times [2022-11-18 18:48:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:36,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776623114] [2022-11-18 18:48:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:36,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:36,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:36,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776623114] [2022-11-18 18:48:36,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776623114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:36,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:36,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:48:36,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790550307] [2022-11-18 18:48:36,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:36,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:48:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:48:36,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:48:36,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-11-18 18:48:36,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:36,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-11-18 18:48:36,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:36,915 INFO L130 PetriNetUnfolder]: 87/283 cut-off events. [2022-11-18 18:48:36,917 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-18 18:48:36,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1080 event pairs, 37 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2022-11-18 18:48:36,921 INFO L137 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-11-18 18:48:36,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2022-11-18 18:48:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:48:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:48:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-11-18 18:48:36,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-11-18 18:48:36,935 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-11-18 18:48:36,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-11-18 18:48:36,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:36,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-11-18 18:48:36,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,942 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,945 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-11-18 18:48:36,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2022-11-18 18:48:36,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 18:48:36,950 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2022-11-18 18:48:36,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-11-18 18:48:36,953 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-11-18 18:48:36,953 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2022-11-18 18:48:36,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:36,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:36,955 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:36,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:48:36,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:36,957 INFO L85 PathProgramCache]: Analyzing trace with hash 535359789, now seen corresponding path program 2 times [2022-11-18 18:48:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:36,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139786805] [2022-11-18 18:48:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:36,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:37,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:37,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139786805] [2022-11-18 18:48:37,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139786805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:37,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685786907] [2022-11-18 18:48:37,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:48:37,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:37,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:37,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:37,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:48:37,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:48:37,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:37,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:48:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:37,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:48:37,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685786907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:37,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:48:37,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-11-18 18:48:37,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235553640] [2022-11-18 18:48:37,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:37,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:48:37,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:48:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:48:37,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-11-18 18:48:37,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:37,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:37,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-11-18 18:48:37,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:37,606 INFO L130 PetriNetUnfolder]: 44/166 cut-off events. [2022-11-18 18:48:37,606 INFO L131 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2022-11-18 18:48:37,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 521 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2022-11-18 18:48:37,608 INFO L137 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-11-18 18:48:37,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2022-11-18 18:48:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:48:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 18:48:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-11-18 18:48:37,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-11-18 18:48:37,611 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-11-18 18:48:37,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-11-18 18:48:37,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:37,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-11-18 18:48:37,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:37,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:37,617 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:37,617 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-11-18 18:48:37,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2022-11-18 18:48:37,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-18 18:48:37,620 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2022-11-18 18:48:37,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-11-18 18:48:37,622 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2022-11-18 18:48:37,622 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2022-11-18 18:48:37,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:37,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:37,623 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:37,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:37,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:37,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1175529915, now seen corresponding path program 1 times [2022-11-18 18:48:37,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:37,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178116259] [2022-11-18 18:48:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:37,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:38,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:38,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178116259] [2022-11-18 18:48:38,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178116259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:38,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733099466] [2022-11-18 18:48:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:38,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:38,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:38,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:38,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:48:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:38,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:48:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:38,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:38,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733099466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:38,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:38,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-11-18 18:48:38,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744236242] [2022-11-18 18:48:38,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:48:38,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:48:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:48:38,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-11-18 18:48:38,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:38,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:38,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-11-18 18:48:38,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:39,048 INFO L130 PetriNetUnfolder]: 17/162 cut-off events. [2022-11-18 18:48:39,048 INFO L131 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-11-18 18:48:39,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 424 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2022-11-18 18:48:39,053 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-11-18 18:48:39,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2022-11-18 18:48:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:48:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 18:48:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-11-18 18:48:39,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-11-18 18:48:39,056 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-11-18 18:48:39,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-11-18 18:48:39,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:39,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-11-18 18:48:39,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 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) [2022-11-18 18:48:39,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:39,060 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:39,060 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-11-18 18:48:39,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2022-11-18 18:48:39,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 18:48:39,065 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2022-11-18 18:48:39,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-11-18 18:48:39,069 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-11-18 18:48:39,069 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2022-11-18 18:48:39,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:39,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:39,070 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:39,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:39,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:39,276 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:39,277 INFO L85 PathProgramCache]: Analyzing trace with hash 935055537, now seen corresponding path program 2 times [2022-11-18 18:48:39,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:39,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876988123] [2022-11-18 18:48:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:39,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:39,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:39,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876988123] [2022-11-18 18:48:39,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876988123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:39,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540611985] [2022-11-18 18:48:39,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:48:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:39,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:39,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:39,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:48:39,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:48:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 18:48:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:39,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:48:39,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540611985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:39,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:39,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-11-18 18:48:39,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332896780] [2022-11-18 18:48:39,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:39,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:48:39,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:48:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:48:39,846 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-11-18 18:48:39,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.3) internal successors, (643), 10 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:39,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:39,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-11-18 18:48:39,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:40,024 INFO L130 PetriNetUnfolder]: 109/370 cut-off events. [2022-11-18 18:48:40,024 INFO L131 PetriNetUnfolder]: For 201/211 co-relation queries the response was YES. [2022-11-18 18:48:40,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 201/211 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1745 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 123 conditions per place. [2022-11-18 18:48:40,029 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-11-18 18:48:40,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2022-11-18 18:48:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:48:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 18:48:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-11-18 18:48:40,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-11-18 18:48:40,035 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-11-18 18:48:40,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-11-18 18:48:40,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:40,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-11-18 18:48:40,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:40,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:40,040 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:40,040 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-11-18 18:48:40,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2022-11-18 18:48:40,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 18:48:40,050 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2022-11-18 18:48:40,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-11-18 18:48:40,054 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2022-11-18 18:48:40,054 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2022-11-18 18:48:40,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.3) internal successors, (643), 10 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:40,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:40,056 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:40,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 18:48:40,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:48:40,262 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:40,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1891359299, now seen corresponding path program 3 times [2022-11-18 18:48:40,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:40,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062339786] [2022-11-18 18:48:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:40,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:40,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062339786] [2022-11-18 18:48:40,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062339786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:40,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104351234] [2022-11-18 18:48:40,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:48:40,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:40,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:40,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:40,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:48:40,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:48:40,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:48:40,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:40,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:40,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104351234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:40,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:40,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-11-18 18:48:40,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142197586] [2022-11-18 18:48:40,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:40,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 18:48:40,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:40,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 18:48:40,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:48:40,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:48:40,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:40,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:40,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:48:40,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:42,661 INFO L130 PetriNetUnfolder]: 312/859 cut-off events. [2022-11-18 18:48:42,661 INFO L131 PetriNetUnfolder]: For 1299/1299 co-relation queries the response was YES. [2022-11-18 18:48:42,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 859 events. 312/859 cut-off events. For 1299/1299 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4686 event pairs, 14 based on Foata normal form. 29/887 useless extension candidates. Maximal degree in co-relation 2530. Up to 168 conditions per place. [2022-11-18 18:48:42,669 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 117 selfloop transitions, 134 changer transitions 11/307 dead transitions. [2022-11-18 18:48:42,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 307 transitions, 1960 flow [2022-11-18 18:48:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 18:48:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-18 18:48:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3311 transitions. [2022-11-18 18:48:42,678 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7477416440831075 [2022-11-18 18:48:42,679 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3311 transitions. [2022-11-18 18:48:42,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3311 transitions. [2022-11-18 18:48:42,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:42,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3311 transitions. [2022-11-18 18:48:42,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 61.31481481481482) internal successors, (3311), 54 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:42,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 82.0) internal successors, (4510), 55 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:42,702 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 82.0) internal successors, (4510), 55 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:42,702 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 54 states and 3311 transitions. [2022-11-18 18:48:42,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 307 transitions, 1960 flow [2022-11-18 18:48:42,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 307 transitions, 1952 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-18 18:48:42,720 INFO L231 Difference]: Finished difference. Result has 153 places, 206 transitions, 1422 flow [2022-11-18 18:48:42,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1422, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2022-11-18 18:48:42,721 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 81 predicate places. [2022-11-18 18:48:42,721 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 1422 flow [2022-11-18 18:48:42,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.9) internal successors, (1198), 20 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:42,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:42,722 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:42,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:42,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:42,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1408127925, now seen corresponding path program 4 times [2022-11-18 18:48:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:42,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297363761] [2022-11-18 18:48:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:42,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:43,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:43,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297363761] [2022-11-18 18:48:43,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297363761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970838914] [2022-11-18 18:48:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:48:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:43,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:43,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:48:43,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:48:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:48:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:43,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970838914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:43,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:43,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-11-18 18:48:43,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610706220] [2022-11-18 18:48:43,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:43,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:48:43,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:48:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:48:43,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:48:43,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 1422 flow. Second operand has 26 states, 26 states have (on average 59.69230769230769) internal successors, (1552), 26 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:43,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:43,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:48:43,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:46,225 INFO L130 PetriNetUnfolder]: 789/2294 cut-off events. [2022-11-18 18:48:46,226 INFO L131 PetriNetUnfolder]: For 7914/7914 co-relation queries the response was YES. [2022-11-18 18:48:46,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8794 conditions, 2294 events. 789/2294 cut-off events. For 7914/7914 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17322 event pairs, 55 based on Foata normal form. 124/2410 useless extension candidates. Maximal degree in co-relation 8768. Up to 444 conditions per place. [2022-11-18 18:48:46,258 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 312 selfloop transitions, 334 changer transitions 21/712 dead transitions. [2022-11-18 18:48:46,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 712 transitions, 6678 flow [2022-11-18 18:48:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 18:48:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-18 18:48:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3772 transitions. [2022-11-18 18:48:46,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7540983606557377 [2022-11-18 18:48:46,270 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3772 transitions. [2022-11-18 18:48:46,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3772 transitions. [2022-11-18 18:48:46,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:46,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3772 transitions. [2022-11-18 18:48:46,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.83606557377049) internal successors, (3772), 61 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:46,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:46,293 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:46,294 INFO L175 Difference]: Start difference. First operand has 153 places, 206 transitions, 1422 flow. Second operand 61 states and 3772 transitions. [2022-11-18 18:48:46,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 712 transitions, 6678 flow [2022-11-18 18:48:46,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 712 transitions, 6189 flow, removed 216 selfloop flow, removed 5 redundant places. [2022-11-18 18:48:46,360 INFO L231 Difference]: Finished difference. Result has 238 places, 492 transitions, 4917 flow [2022-11-18 18:48:46,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4917, PETRI_PLACES=238, PETRI_TRANSITIONS=492} [2022-11-18 18:48:46,362 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 166 predicate places. [2022-11-18 18:48:46,362 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 492 transitions, 4917 flow [2022-11-18 18:48:46,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.69230769230769) internal successors, (1552), 26 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:46,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:46,363 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:46,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:46,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:46,569 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1094755459, now seen corresponding path program 5 times [2022-11-18 18:48:46,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:46,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838695718] [2022-11-18 18:48:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:46,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838695718] [2022-11-18 18:48:46,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838695718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:46,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819952245] [2022-11-18 18:48:46,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:48:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:46,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:46,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:48:46,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 18:48:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:46,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:48:46,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:47,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:47,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819952245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:47,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:47,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-11-18 18:48:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992017733] [2022-11-18 18:48:47,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 18:48:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 18:48:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-18 18:48:47,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:48:47,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 492 transitions, 4917 flow. Second operand has 25 states, 25 states have (on average 59.76) internal successors, (1494), 25 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:47,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:47,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:48:47,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:49,287 INFO L130 PetriNetUnfolder]: 962/2730 cut-off events. [2022-11-18 18:48:49,287 INFO L131 PetriNetUnfolder]: For 23237/23237 co-relation queries the response was YES. [2022-11-18 18:48:49,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14529 conditions, 2730 events. 962/2730 cut-off events. For 23237/23237 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21748 event pairs, 21 based on Foata normal form. 33/2753 useless extension candidates. Maximal degree in co-relation 14475. Up to 512 conditions per place. [2022-11-18 18:48:49,403 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 183 selfloop transitions, 511 changer transitions 7/746 dead transitions. [2022-11-18 18:48:49,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 746 transitions, 9029 flow [2022-11-18 18:48:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 18:48:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 18:48:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-11-18 18:48:49,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-11-18 18:48:49,413 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-11-18 18:48:49,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-11-18 18:48:49,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:49,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-11-18 18:48:49,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:49,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:49,431 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:49,431 INFO L175 Difference]: Start difference. First operand has 238 places, 492 transitions, 4917 flow. Second operand 39 states and 2387 transitions. [2022-11-18 18:48:49,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 746 transitions, 9029 flow [2022-11-18 18:48:49,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 746 transitions, 8709 flow, removed 157 selfloop flow, removed 3 redundant places. [2022-11-18 18:48:49,638 INFO L231 Difference]: Finished difference. Result has 287 places, 646 transitions, 8208 flow [2022-11-18 18:48:49,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4739, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8208, PETRI_PLACES=287, PETRI_TRANSITIONS=646} [2022-11-18 18:48:49,640 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 215 predicate places. [2022-11-18 18:48:49,640 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 646 transitions, 8208 flow [2022-11-18 18:48:49,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.76) internal successors, (1494), 25 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:49,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:49,641 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:49,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:49,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:49,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1938691821, now seen corresponding path program 6 times [2022-11-18 18:48:49,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:49,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628832920] [2022-11-18 18:48:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:49,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:50,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:50,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628832920] [2022-11-18 18:48:50,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628832920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:50,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600964508] [2022-11-18 18:48:50,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:48:50,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:50,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:50,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:50,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:48:50,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 18:48:50,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:48:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:50,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:50,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600964508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:50,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:50,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-18 18:48:50,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067189485] [2022-11-18 18:48:50,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 18:48:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 18:48:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:48:50,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:48:50,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 646 transitions, 8208 flow. Second operand has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 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) [2022-11-18 18:48:50,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:50,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:48:50,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:54,496 INFO L130 PetriNetUnfolder]: 1247/3671 cut-off events. [2022-11-18 18:48:54,497 INFO L131 PetriNetUnfolder]: For 46548/46548 co-relation queries the response was YES. [2022-11-18 18:48:54,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22552 conditions, 3671 events. 1247/3671 cut-off events. For 46548/46548 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 31681 event pairs, 59 based on Foata normal form. 38/3677 useless extension candidates. Maximal degree in co-relation 22484. Up to 626 conditions per place. [2022-11-18 18:48:54,569 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 256 selfloop transitions, 795 changer transitions 9/1105 dead transitions. [2022-11-18 18:48:54,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1105 transitions, 16326 flow [2022-11-18 18:48:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 18:48:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-18 18:48:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4397 transitions. [2022-11-18 18:48:54,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7447493224932249 [2022-11-18 18:48:54,626 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4397 transitions. [2022-11-18 18:48:54,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4397 transitions. [2022-11-18 18:48:54,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:54,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4397 transitions. [2022-11-18 18:48:54,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.06944444444444) internal successors, (4397), 72 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:54,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:54,673 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:54,676 INFO L175 Difference]: Start difference. First operand has 287 places, 646 transitions, 8208 flow. Second operand 72 states and 4397 transitions. [2022-11-18 18:48:54,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1105 transitions, 16326 flow [2022-11-18 18:48:55,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1105 transitions, 15319 flow, removed 156 selfloop flow, removed 19 redundant places. [2022-11-18 18:48:55,028 INFO L231 Difference]: Finished difference. Result has 369 places, 944 transitions, 14094 flow [2022-11-18 18:48:55,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7530, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=14094, PETRI_PLACES=369, PETRI_TRANSITIONS=944} [2022-11-18 18:48:55,030 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 297 predicate places. [2022-11-18 18:48:55,030 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 944 transitions, 14094 flow [2022-11-18 18:48:55,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 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) [2022-11-18 18:48:55,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:55,032 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:55,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:55,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:55,238 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash 946092587, now seen corresponding path program 7 times [2022-11-18 18:48:55,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:55,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054930283] [2022-11-18 18:48:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054930283] [2022-11-18 18:48:55,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054930283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223574099] [2022-11-18 18:48:55,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:48:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:55,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:55,430 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:55,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:48:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:55,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:48:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:55,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:56,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223574099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:56,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:56,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-18 18:48:56,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425240889] [2022-11-18 18:48:56,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:56,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 18:48:56,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:56,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 18:48:56,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:48:56,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:48:56,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 944 transitions, 14094 flow. Second operand has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:56,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:48:56,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:48:56,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:48:59,046 INFO L130 PetriNetUnfolder]: 1335/4010 cut-off events. [2022-11-18 18:48:59,047 INFO L131 PetriNetUnfolder]: For 66881/66881 co-relation queries the response was YES. [2022-11-18 18:48:59,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27449 conditions, 4010 events. 1335/4010 cut-off events. For 66881/66881 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35704 event pairs, 29 based on Foata normal form. 2/4002 useless extension candidates. Maximal degree in co-relation 27355. Up to 674 conditions per place. [2022-11-18 18:48:59,140 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 381 selfloop transitions, 755 changer transitions 35/1216 dead transitions. [2022-11-18 18:48:59,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1216 transitions, 21060 flow [2022-11-18 18:48:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 18:48:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-18 18:48:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-11-18 18:48:59,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-11-18 18:48:59,145 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-11-18 18:48:59,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-11-18 18:48:59,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:48:59,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-11-18 18:48:59,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,158 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,158 INFO L175 Difference]: Start difference. First operand has 369 places, 944 transitions, 14094 flow. Second operand 41 states and 2515 transitions. [2022-11-18 18:48:59,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1216 transitions, 21060 flow [2022-11-18 18:48:59,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1216 transitions, 20578 flow, removed 170 selfloop flow, removed 22 redundant places. [2022-11-18 18:48:59,794 INFO L231 Difference]: Finished difference. Result has 395 places, 1064 transitions, 17947 flow [2022-11-18 18:48:59,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=13590, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17947, PETRI_PLACES=395, PETRI_TRANSITIONS=1064} [2022-11-18 18:48:59,795 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 323 predicate places. [2022-11-18 18:48:59,795 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1064 transitions, 17947 flow [2022-11-18 18:48:59,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.5) internal successors, (1309), 22 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:59,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:48:59,796 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:59,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 18:48:59,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:59,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:48:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash -588062631, now seen corresponding path program 8 times [2022-11-18 18:49:00,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:00,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105589581] [2022-11-18 18:49:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:00,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:00,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105589581] [2022-11-18 18:49:00,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105589581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:00,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101875539] [2022-11-18 18:49:00,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:00,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:00,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:49:00,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:00,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:49:00,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:00,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:00,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101875539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:00,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:00,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-18 18:49:00,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682086504] [2022-11-18 18:49:00,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:00,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:49:00,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:49:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:49:00,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:49:00,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1064 transitions, 17947 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:00,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:00,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:49:00,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:49:03,439 INFO L130 PetriNetUnfolder]: 1306/3863 cut-off events. [2022-11-18 18:49:03,440 INFO L131 PetriNetUnfolder]: For 65720/65720 co-relation queries the response was YES. [2022-11-18 18:49:03,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28430 conditions, 3863 events. 1306/3863 cut-off events. For 65720/65720 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33895 event pairs, 122 based on Foata normal form. 1/3802 useless extension candidates. Maximal degree in co-relation 28333. Up to 655 conditions per place. [2022-11-18 18:49:03,526 INFO L137 encePairwiseOnDemand]: 71/82 looper letters, 467 selfloop transitions, 618 changer transitions 12/1142 dead transitions. [2022-11-18 18:49:03,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1142 transitions, 21252 flow [2022-11-18 18:49:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:49:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:49:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2022-11-18 18:49:03,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2022-11-18 18:49:03,529 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2022-11-18 18:49:03,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2022-11-18 18:49:03,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:49:03,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2022-11-18 18:49:03,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,536 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:03,536 INFO L175 Difference]: Start difference. First operand has 395 places, 1064 transitions, 17947 flow. Second operand 21 states and 1296 transitions. [2022-11-18 18:49:03,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1142 transitions, 21252 flow [2022-11-18 18:49:04,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1142 transitions, 20491 flow, removed 95 selfloop flow, removed 20 redundant places. [2022-11-18 18:49:04,456 INFO L231 Difference]: Finished difference. Result has 397 places, 1081 transitions, 18725 flow [2022-11-18 18:49:04,457 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17222, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18725, PETRI_PLACES=397, PETRI_TRANSITIONS=1081} [2022-11-18 18:49:04,457 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 325 predicate places. [2022-11-18 18:49:04,458 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1081 transitions, 18725 flow [2022-11-18 18:49:04,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:04,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:04,458 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:04,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:04,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 18:49:04,659 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:49:04,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:04,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1655063311, now seen corresponding path program 9 times [2022-11-18 18:49:04,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:04,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001411617] [2022-11-18 18:49:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:04,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001411617] [2022-11-18 18:49:04,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001411617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802433669] [2022-11-18 18:49:04,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:49:04,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:04,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:04,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:49:04,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 18:49:04,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:04,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:49:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:05,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:05,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802433669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:05,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:05,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-18 18:49:05,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376834362] [2022-11-18 18:49:05,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:05,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:49:05,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:49:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:49:05,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:49:05,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1081 transitions, 18725 flow. Second operand has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:05,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:05,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:49:05,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:49:09,422 INFO L130 PetriNetUnfolder]: 1753/5165 cut-off events. [2022-11-18 18:49:09,422 INFO L131 PetriNetUnfolder]: For 92388/92388 co-relation queries the response was YES. [2022-11-18 18:49:09,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38661 conditions, 5165 events. 1753/5165 cut-off events. For 92388/92388 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 48089 event pairs, 68 based on Foata normal form. 43/5173 useless extension candidates. Maximal degree in co-relation 38562. Up to 927 conditions per place. [2022-11-18 18:49:09,504 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 339 selfloop transitions, 1251 changer transitions 3/1638 dead transitions. [2022-11-18 18:49:09,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1638 transitions, 31387 flow [2022-11-18 18:49:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 18:49:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-18 18:49:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3837 transitions. [2022-11-18 18:49:09,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2022-11-18 18:49:09,511 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3837 transitions. [2022-11-18 18:49:09,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3837 transitions. [2022-11-18 18:49:09,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:49:09,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3837 transitions. [2022-11-18 18:49:09,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.904761904761905) internal successors, (3837), 63 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,528 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:09,528 INFO L175 Difference]: Start difference. First operand has 397 places, 1081 transitions, 18725 flow. Second operand 63 states and 3837 transitions. [2022-11-18 18:49:09,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1638 transitions, 31387 flow [2022-11-18 18:49:10,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1638 transitions, 30331 flow, removed 13 selfloop flow, removed 11 redundant places. [2022-11-18 18:49:10,539 INFO L231 Difference]: Finished difference. Result has 467 places, 1493 transitions, 29773 flow [2022-11-18 18:49:10,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17981, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=29773, PETRI_PLACES=467, PETRI_TRANSITIONS=1493} [2022-11-18 18:49:10,541 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 395 predicate places. [2022-11-18 18:49:10,541 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 1493 transitions, 29773 flow [2022-11-18 18:49:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:10,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:10,542 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:10,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:10,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:49:10,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:49:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1216921135, now seen corresponding path program 10 times [2022-11-18 18:49:10,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262893116] [2022-11-18 18:49:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:10,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:10,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262893116] [2022-11-18 18:49:10,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262893116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137651711] [2022-11-18 18:49:10,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:49:10,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:10,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:10,930 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:10,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:49:11,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:49:11,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:11,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:49:11,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:11,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:11,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137651711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:11,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:11,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-18 18:49:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696286182] [2022-11-18 18:49:11,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:49:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:49:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:49:11,542 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:49:11,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 1493 transitions, 29773 flow. Second operand has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:11,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:11,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:49:11,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:49:15,891 INFO L130 PetriNetUnfolder]: 1765/5272 cut-off events. [2022-11-18 18:49:15,891 INFO L131 PetriNetUnfolder]: For 119838/119838 co-relation queries the response was YES. [2022-11-18 18:49:15,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43654 conditions, 5272 events. 1765/5272 cut-off events. For 119838/119838 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49872 event pairs, 89 based on Foata normal form. 4/5233 useless extension candidates. Maximal degree in co-relation 43536. Up to 900 conditions per place. [2022-11-18 18:49:16,006 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 539 selfloop transitions, 1047 changer transitions 16/1647 dead transitions. [2022-11-18 18:49:16,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1647 transitions, 35616 flow [2022-11-18 18:49:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 18:49:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-18 18:49:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2525 transitions. [2022-11-18 18:49:16,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7510410469958358 [2022-11-18 18:49:16,010 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2525 transitions. [2022-11-18 18:49:16,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2525 transitions. [2022-11-18 18:49:16,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:49:16,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2525 transitions. [2022-11-18 18:49:16,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.58536585365854) internal successors, (2525), 41 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:16,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:16,216 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:16,216 INFO L175 Difference]: Start difference. First operand has 467 places, 1493 transitions, 29773 flow. Second operand 41 states and 2525 transitions. [2022-11-18 18:49:16,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1647 transitions, 35616 flow [2022-11-18 18:49:17,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1647 transitions, 34819 flow, removed 132 selfloop flow, removed 31 redundant places. [2022-11-18 18:49:17,593 INFO L231 Difference]: Finished difference. Result has 483 places, 1527 transitions, 32195 flow [2022-11-18 18:49:17,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=28976, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32195, PETRI_PLACES=483, PETRI_TRANSITIONS=1527} [2022-11-18 18:49:17,595 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 411 predicate places. [2022-11-18 18:49:17,595 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 1527 transitions, 32195 flow [2022-11-18 18:49:17,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:17,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:17,596 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:17,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:17,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:49:17,796 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:49:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:17,797 INFO L85 PathProgramCache]: Analyzing trace with hash -255095131, now seen corresponding path program 11 times [2022-11-18 18:49:17,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:17,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103846420] [2022-11-18 18:49:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:17,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:17,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:17,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103846420] [2022-11-18 18:49:17,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103846420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:17,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392291303] [2022-11-18 18:49:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:49:17,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:17,964 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:17,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:49:18,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 18:49:18,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:49:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:18,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:18,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392291303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:18,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:18,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-18 18:49:18,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581251171] [2022-11-18 18:49:18,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:18,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 18:49:18,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 18:49:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:49:18,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:49:18,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 1527 transitions, 32195 flow. Second operand has 21 states, 21 states have (on average 59.333333333333336) internal successors, (1246), 21 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:18,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:18,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:49:18,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:49:25,394 INFO L130 PetriNetUnfolder]: 2376/7284 cut-off events. [2022-11-18 18:49:25,394 INFO L131 PetriNetUnfolder]: For 181599/181599 co-relation queries the response was YES. [2022-11-18 18:49:25,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62905 conditions, 7284 events. 2376/7284 cut-off events. For 181599/181599 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 74029 event pairs, 58 based on Foata normal form. 43/7289 useless extension candidates. Maximal degree in co-relation 62781. Up to 1156 conditions per place. [2022-11-18 18:49:25,582 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 827 selfloop transitions, 1402 changer transitions 25/2299 dead transitions. [2022-11-18 18:49:25,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 2299 transitions, 52676 flow [2022-11-18 18:49:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-18 18:49:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-11-18 18:49:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4088 transitions. [2022-11-18 18:49:25,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7440844557699309 [2022-11-18 18:49:25,592 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4088 transitions. [2022-11-18 18:49:25,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4088 transitions. [2022-11-18 18:49:25,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:49:25,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4088 transitions. [2022-11-18 18:49:25,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 61.014925373134325) internal successors, (4088), 67 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:25,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:25,615 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:25,615 INFO L175 Difference]: Start difference. First operand has 483 places, 1527 transitions, 32195 flow. Second operand 67 states and 4088 transitions. [2022-11-18 18:49:25,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 2299 transitions, 52676 flow [2022-11-18 18:49:28,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 2299 transitions, 50906 flow, removed 145 selfloop flow, removed 26 redundant places. [2022-11-18 18:49:28,372 INFO L231 Difference]: Finished difference. Result has 548 places, 2042 transitions, 47402 flow [2022-11-18 18:49:28,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30890, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=943, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=47402, PETRI_PLACES=548, PETRI_TRANSITIONS=2042} [2022-11-18 18:49:28,374 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 476 predicate places. [2022-11-18 18:49:28,374 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 2042 transitions, 47402 flow [2022-11-18 18:49:28,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.333333333333336) internal successors, (1246), 21 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:28,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:28,375 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:28,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:28,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:49:28,581 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:49:28,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1753826647, now seen corresponding path program 12 times [2022-11-18 18:49:28,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:28,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922424860] [2022-11-18 18:49:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:28,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:28,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922424860] [2022-11-18 18:49:28,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922424860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629268244] [2022-11-18 18:49:28,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:49:28,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:28,810 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:28,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:49:28,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 18:49:28,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:49:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:29,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:29,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629268244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:29,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:29,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-18 18:49:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846618736] [2022-11-18 18:49:29,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:29,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:49:29,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:49:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:49:29,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:49:29,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 2042 transitions, 47402 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:29,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:29,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:49:29,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:49:36,765 INFO L130 PetriNetUnfolder]: 2715/8205 cut-off events. [2022-11-18 18:49:36,765 INFO L131 PetriNetUnfolder]: For 258069/258074 co-relation queries the response was YES. [2022-11-18 18:49:36,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78408 conditions, 8205 events. 2715/8205 cut-off events. For 258069/258074 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 84667 event pairs, 181 based on Foata normal form. 1/8167 useless extension candidates. Maximal degree in co-relation 78260. Up to 3460 conditions per place. [2022-11-18 18:49:36,979 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1844 selfloop transitions, 556 changer transitions 8/2453 dead transitions. [2022-11-18 18:49:36,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 2453 transitions, 61944 flow [2022-11-18 18:49:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:49:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 18:49:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1655 transitions. [2022-11-18 18:49:36,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7475158084914183 [2022-11-18 18:49:36,984 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1655 transitions. [2022-11-18 18:49:36,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1655 transitions. [2022-11-18 18:49:36,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:49:36,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1655 transitions. [2022-11-18 18:49:36,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.2962962962963) internal successors, (1655), 27 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:36,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:36,994 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:36,994 INFO L175 Difference]: Start difference. First operand has 548 places, 2042 transitions, 47402 flow. Second operand 27 states and 1655 transitions. [2022-11-18 18:49:36,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 2453 transitions, 61944 flow [2022-11-18 18:49:42,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 2453 transitions, 59624 flow, removed 931 selfloop flow, removed 19 redundant places. [2022-11-18 18:49:42,135 INFO L231 Difference]: Finished difference. Result has 566 places, 2202 transitions, 51603 flow [2022-11-18 18:49:42,137 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=45800, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=51603, PETRI_PLACES=566, PETRI_TRANSITIONS=2202} [2022-11-18 18:49:42,137 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 494 predicate places. [2022-11-18 18:49:42,138 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 2202 transitions, 51603 flow [2022-11-18 18:49:42,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:42,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:42,139 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:42,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:42,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:49:42,345 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:49:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1591125555, now seen corresponding path program 13 times [2022-11-18 18:49:42,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:42,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287769684] [2022-11-18 18:49:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:42,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:42,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287769684] [2022-11-18 18:49:42,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287769684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:42,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255998880] [2022-11-18 18:49:42,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:49:42,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:42,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:42,542 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:42,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:49:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:42,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:49:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:42,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:43,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255998880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:43,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:43,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-18 18:49:43,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023499884] [2022-11-18 18:49:43,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:43,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:49:43,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:49:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:49:43,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:49:43,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 2202 transitions, 51603 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:43,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:43,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:49:43,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:49:52,484 INFO L130 PetriNetUnfolder]: 2722/8224 cut-off events. [2022-11-18 18:49:52,484 INFO L131 PetriNetUnfolder]: For 237754/237759 co-relation queries the response was YES. [2022-11-18 18:49:52,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76693 conditions, 8224 events. 2722/8224 cut-off events. For 237754/237759 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 84887 event pairs, 137 based on Foata normal form. 1/8187 useless extension candidates. Maximal degree in co-relation 76533. Up to 3982 conditions per place. [2022-11-18 18:49:52,720 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1775 selfloop transitions, 426 changer transitions 6/2252 dead transitions. [2022-11-18 18:49:52,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 2252 transitions, 56970 flow [2022-11-18 18:49:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:49:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:49:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1101 transitions. [2022-11-18 18:49:52,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7459349593495935 [2022-11-18 18:49:52,723 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1101 transitions. [2022-11-18 18:49:52,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1101 transitions. [2022-11-18 18:49:52,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:49:52,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1101 transitions. [2022-11-18 18:49:52,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.166666666666664) internal successors, (1101), 18 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) [2022-11-18 18:49:52,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:52,732 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:52,732 INFO L175 Difference]: Start difference. First operand has 566 places, 2202 transitions, 51603 flow. Second operand 18 states and 1101 transitions. [2022-11-18 18:49:52,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 2252 transitions, 56970 flow [2022-11-18 18:49:58,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 2252 transitions, 56872 flow, removed 14 selfloop flow, removed 11 redundant places. [2022-11-18 18:49:58,113 INFO L231 Difference]: Finished difference. Result has 574 places, 2213 transitions, 52860 flow [2022-11-18 18:49:58,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=51505, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=52860, PETRI_PLACES=574, PETRI_TRANSITIONS=2213} [2022-11-18 18:49:58,116 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 502 predicate places. [2022-11-18 18:49:58,116 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 2213 transitions, 52860 flow [2022-11-18 18:49:58,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:58,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:49:58,116 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:58,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:58,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:58,317 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:49:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1669028813, now seen corresponding path program 14 times [2022-11-18 18:49:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:58,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811680765] [2022-11-18 18:49:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:58,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:58,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:58,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811680765] [2022-11-18 18:49:58,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811680765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:58,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889435571] [2022-11-18 18:49:58,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:58,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:58,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:58,536 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:58,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:49:58,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:58,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:49:58,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:58,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:58,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889435571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:58,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:58,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-18 18:49:58,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750233994] [2022-11-18 18:49:58,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:58,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:49:58,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:49:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:49:58,983 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:49:58,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 2213 transitions, 52860 flow. Second operand has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:58,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:49:58,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:49:58,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:50:08,943 INFO L130 PetriNetUnfolder]: 3092/9616 cut-off events. [2022-11-18 18:50:08,943 INFO L131 PetriNetUnfolder]: For 298898/298903 co-relation queries the response was YES. [2022-11-18 18:50:09,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89651 conditions, 9616 events. 3092/9616 cut-off events. For 298898/298903 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 103398 event pairs, 147 based on Foata normal form. 13/9565 useless extension candidates. Maximal degree in co-relation 89488. Up to 1851 conditions per place. [2022-11-18 18:50:09,207 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1394 selfloop transitions, 1249 changer transitions 8/2696 dead transitions. [2022-11-18 18:50:09,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 2696 transitions, 69457 flow [2022-11-18 18:50:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-18 18:50:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-18 18:50:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2661 transitions. [2022-11-18 18:50:09,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7546795235394215 [2022-11-18 18:50:09,212 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2661 transitions. [2022-11-18 18:50:09,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2661 transitions. [2022-11-18 18:50:09,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:50:09,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2661 transitions. [2022-11-18 18:50:09,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.883720930232556) internal successors, (2661), 43 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:09,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:09,220 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:09,221 INFO L175 Difference]: Start difference. First operand has 574 places, 2213 transitions, 52860 flow. Second operand 43 states and 2661 transitions. [2022-11-18 18:50:09,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 2696 transitions, 69457 flow [2022-11-18 18:50:15,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 2696 transitions, 69250 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-11-18 18:50:15,673 INFO L231 Difference]: Finished difference. Result has 617 places, 2459 transitions, 62960 flow [2022-11-18 18:50:15,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=52621, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=62960, PETRI_PLACES=617, PETRI_TRANSITIONS=2459} [2022-11-18 18:50:15,676 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 545 predicate places. [2022-11-18 18:50:15,676 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 2459 transitions, 62960 flow [2022-11-18 18:50:15,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.43478260869565) internal successors, (1367), 23 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:15,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:50:15,677 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:15,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:15,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:50:15,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:50:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:15,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1461075301, now seen corresponding path program 15 times [2022-11-18 18:50:15,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:15,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504435452] [2022-11-18 18:50:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:15,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:16,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504435452] [2022-11-18 18:50:16,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504435452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613009962] [2022-11-18 18:50:16,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:50:16,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:16,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:16,066 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:50:16,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 18:50:16,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:50:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:16,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:16,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613009962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:16,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:16,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-18 18:50:16,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076301256] [2022-11-18 18:50:16,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:16,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:50:16,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:50:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:50:16,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:50:16,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 2459 transitions, 62960 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:16,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:16,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:50:16,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:50:30,995 INFO L130 PetriNetUnfolder]: 3937/12571 cut-off events. [2022-11-18 18:50:30,995 INFO L131 PetriNetUnfolder]: For 439006/439011 co-relation queries the response was YES. [2022-11-18 18:50:31,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122645 conditions, 12571 events. 3937/12571 cut-off events. For 439006/439011 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 142831 event pairs, 208 based on Foata normal form. 9/12497 useless extension candidates. Maximal degree in co-relation 122470. Up to 3189 conditions per place. [2022-11-18 18:50:31,476 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 2016 selfloop transitions, 1454 changer transitions 6/3521 dead transitions. [2022-11-18 18:50:31,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 3521 transitions, 97274 flow [2022-11-18 18:50:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 18:50:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-18 18:50:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3362 transitions. [2022-11-18 18:50:31,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7454545454545455 [2022-11-18 18:50:31,482 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3362 transitions. [2022-11-18 18:50:31,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3362 transitions. [2022-11-18 18:50:31,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:50:31,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3362 transitions. [2022-11-18 18:50:31,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 61.127272727272725) internal successors, (3362), 55 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:31,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:31,498 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:31,498 INFO L175 Difference]: Start difference. First operand has 617 places, 2459 transitions, 62960 flow. Second operand 55 states and 3362 transitions. [2022-11-18 18:50:31,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 3521 transitions, 97274 flow [2022-11-18 18:50:41,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 3521 transitions, 96071 flow, removed 471 selfloop flow, removed 16 redundant places. [2022-11-18 18:50:41,181 INFO L231 Difference]: Finished difference. Result has 677 places, 3051 transitions, 84491 flow [2022-11-18 18:50:41,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=62235, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=891, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=84491, PETRI_PLACES=677, PETRI_TRANSITIONS=3051} [2022-11-18 18:50:41,183 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 605 predicate places. [2022-11-18 18:50:41,183 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 3051 transitions, 84491 flow [2022-11-18 18:50:41,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:41,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:50:41,184 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:41,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:41,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:41,390 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:50:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1527497207, now seen corresponding path program 16 times [2022-11-18 18:50:41,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:41,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862010133] [2022-11-18 18:50:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:41,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:41,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862010133] [2022-11-18 18:50:41,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862010133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018507202] [2022-11-18 18:50:41,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:50:41,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:41,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:41,630 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:41,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:50:41,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:50:41,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:41,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:50:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:42,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:42,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018507202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:42,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:42,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-11-18 18:50:42,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426780765] [2022-11-18 18:50:42,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:42,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:50:42,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:50:42,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:50:42,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:50:42,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 3051 transitions, 84491 flow. Second operand has 26 states, 26 states have (on average 59.69230769230769) internal successors, (1552), 26 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:42,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:50:42,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:50:42,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:51:01,074 INFO L130 PetriNetUnfolder]: 4270/13579 cut-off events. [2022-11-18 18:51:01,074 INFO L131 PetriNetUnfolder]: For 549071/549077 co-relation queries the response was YES. [2022-11-18 18:51:01,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138524 conditions, 13579 events. 4270/13579 cut-off events. For 549071/549077 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 156188 event pairs, 264 based on Foata normal form. 151/13671 useless extension candidates. Maximal degree in co-relation 138327. Up to 4868 conditions per place. [2022-11-18 18:51:01,626 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1673 selfloop transitions, 1838 changer transitions 5/3561 dead transitions. [2022-11-18 18:51:01,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 3561 transitions, 104807 flow [2022-11-18 18:51:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 18:51:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 18:51:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2072 transitions. [2022-11-18 18:51:01,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7657058388765706 [2022-11-18 18:51:01,630 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2072 transitions. [2022-11-18 18:51:01,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2072 transitions. [2022-11-18 18:51:01,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:51:01,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2072 transitions. [2022-11-18 18:51:01,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.78787878787879) internal successors, (2072), 33 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:01,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 82.0) internal successors, (2788), 34 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:01,640 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 82.0) internal successors, (2788), 34 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:01,640 INFO L175 Difference]: Start difference. First operand has 677 places, 3051 transitions, 84491 flow. Second operand 33 states and 2072 transitions. [2022-11-18 18:51:01,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 3561 transitions, 104807 flow [2022-11-18 18:51:13,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 3561 transitions, 104390 flow, removed 144 selfloop flow, removed 17 redundant places. [2022-11-18 18:51:13,243 INFO L231 Difference]: Finished difference. Result has 712 places, 3317 transitions, 99133 flow [2022-11-18 18:51:13,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=84095, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=99133, PETRI_PLACES=712, PETRI_TRANSITIONS=3317} [2022-11-18 18:51:13,246 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 640 predicate places. [2022-11-18 18:51:13,246 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 3317 transitions, 99133 flow [2022-11-18 18:51:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.69230769230769) internal successors, (1552), 26 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:13,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:51:13,247 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:13,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:51:13,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:13,457 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:51:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash 446491075, now seen corresponding path program 17 times [2022-11-18 18:51:13,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:13,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341500129] [2022-11-18 18:51:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:13,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:13,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341500129] [2022-11-18 18:51:13,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341500129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052985054] [2022-11-18 18:51:13,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:51:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:13,652 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:13,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:51:13,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 18:51:13,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:51:13,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:51:13,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:13,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:14,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052985054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:14,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:14,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-18 18:51:14,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917528888] [2022-11-18 18:51:14,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:14,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:51:14,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:14,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:51:14,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:51:14,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:51:14,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 3317 transitions, 99133 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:14,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:51:14,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:51:14,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:51:36,991 INFO L130 PetriNetUnfolder]: 4497/14251 cut-off events. [2022-11-18 18:51:36,991 INFO L131 PetriNetUnfolder]: For 700956/700961 co-relation queries the response was YES. [2022-11-18 18:51:37,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158246 conditions, 14251 events. 4497/14251 cut-off events. For 700956/700961 co-relation queries the response was YES. Maximal size of possible extension queue 912. Compared 165177 event pairs, 324 based on Foata normal form. 4/14175 useless extension candidates. Maximal degree in co-relation 158027. Up to 5043 conditions per place. [2022-11-18 18:51:37,601 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 2565 selfloop transitions, 997 changer transitions 8/3615 dead transitions. [2022-11-18 18:51:37,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 3615 transitions, 114306 flow [2022-11-18 18:51:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 18:51:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 18:51:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2265 transitions. [2022-11-18 18:51:37,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7465392221489783 [2022-11-18 18:51:37,604 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2265 transitions. [2022-11-18 18:51:37,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2265 transitions. [2022-11-18 18:51:37,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:51:37,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2265 transitions. [2022-11-18 18:51:37,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.21621621621622) internal successors, (2265), 37 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:37,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:37,612 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:37,612 INFO L175 Difference]: Start difference. First operand has 712 places, 3317 transitions, 99133 flow. Second operand 37 states and 2265 transitions. [2022-11-18 18:51:37,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 3615 transitions, 114306 flow [2022-11-18 18:51:52,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 3615 transitions, 113395 flow, removed 442 selfloop flow, removed 3 redundant places. [2022-11-18 18:51:52,392 INFO L231 Difference]: Finished difference. Result has 758 places, 3422 transitions, 105035 flow [2022-11-18 18:51:52,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=98131, PETRI_DIFFERENCE_MINUEND_PLACES=709, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=105035, PETRI_PLACES=758, PETRI_TRANSITIONS=3422} [2022-11-18 18:51:52,396 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 686 predicate places. [2022-11-18 18:51:52,396 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 3422 transitions, 105035 flow [2022-11-18 18:51:52,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:52,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:51:52,397 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:52,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:51:52,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:52,603 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:51:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:52,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2068401477, now seen corresponding path program 18 times [2022-11-18 18:51:52,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978275450] [2022-11-18 18:51:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:52,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978275450] [2022-11-18 18:51:52,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978275450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:52,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610340267] [2022-11-18 18:51:52,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:51:52,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:52,793 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:52,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_676dd87e-0133-412a-b583-2ee9959ddfab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:51:52,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 18:51:52,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:51:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:51:52,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:53,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610340267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:53,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:53,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-18 18:51:53,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025015870] [2022-11-18 18:51:53,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:53,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:51:53,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:53,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:51:53,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:51:53,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-18 18:51:53,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 3422 transitions, 105035 flow. Second operand has 24 states, 24 states have (on average 59.375) internal successors, (1425), 24 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:53,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:51:53,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-18 18:51:53,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:52:16,655 INFO L130 PetriNetUnfolder]: 4494/14218 cut-off events. [2022-11-18 18:52:16,655 INFO L131 PetriNetUnfolder]: For 728239/728244 co-relation queries the response was YES. [2022-11-18 18:52:17,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161581 conditions, 14218 events. 4494/14218 cut-off events. For 728239/728244 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 164811 event pairs, 253 based on Foata normal form. 1/14142 useless extension candidates. Maximal degree in co-relation 161350. Up to 6574 conditions per place. [2022-11-18 18:52:17,275 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 2738 selfloop transitions, 668 changer transitions 5/3456 dead transitions. [2022-11-18 18:52:17,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 3456 transitions, 112599 flow [2022-11-18 18:52:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:52:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:52:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1101 transitions. [2022-11-18 18:52:17,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7459349593495935 [2022-11-18 18:52:17,277 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1101 transitions. [2022-11-18 18:52:17,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1101 transitions. [2022-11-18 18:52:17,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:52:17,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1101 transitions. [2022-11-18 18:52:17,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.166666666666664) internal successors, (1101), 18 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) [2022-11-18 18:52:17,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:17,281 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:17,281 INFO L175 Difference]: Start difference. First operand has 758 places, 3422 transitions, 105035 flow. Second operand 18 states and 1101 transitions. [2022-11-18 18:52:17,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 3456 transitions, 112599 flow