./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a --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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- 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-b5237d8 [2022-11-21 09:03:51,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:03:51,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:03:51,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:03:51,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:03:51,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:03:51,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:03:51,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:03:51,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:03:51,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:03:51,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:03:51,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:03:51,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:03:51,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:03:51,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:03:51,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:03:51,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:03:51,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:03:51,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:03:51,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:03:51,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:03:51,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:03:51,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:03:51,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:03:51,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:03:51,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:03:51,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:03:51,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:03:51,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:03:51,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:03:51,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:03:51,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:03:51,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:03:51,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:03:51,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:03:51,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:03:51,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:03:51,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:03:51,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:03:51,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:03:51,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:03:51,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 09:03:51,726 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:03:51,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:03:51,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:03:51,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:03:51,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:03:51,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:03:51,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:03:51,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:03:51,733 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:03:51,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:03:51,734 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:03:51,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:03:51,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:03:51,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:03:51,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 09:03:51,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:03:51,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 09:03:51,736 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:03:51,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:03:51,736 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:03:51,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 09:03:51,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:03:51,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:03:51,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:03:51,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:03:51,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:03:51,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:03:51,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 09:03:51,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:03:51,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:03:51,739 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 09:03:51,739 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 09:03:51,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 09:03:51,740 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_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-11-21 09:03:52,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:03:52,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:03:52,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:03:52,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:03:52,043 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:03:52,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-21 09:03:55,070 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:03:55,288 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:03:55,289 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-11-21 09:03:55,296 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/data/9f554f415/0884ee98ca7047eb958d28c265728da9/FLAGca20bba90 [2022-11-21 09:03:55,312 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/data/9f554f415/0884ee98ca7047eb958d28c265728da9 [2022-11-21 09:03:55,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:03:55,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:03:55,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:03:55,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:03:55,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:03:55,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a23f805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55, skipping insertion in model container [2022-11-21 09:03:55,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:03:55,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:03:55,564 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-21 09:03:55,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:03:55,582 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:03:55,602 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-11-21 09:03:55,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:03:55,618 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:03:55,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55 WrapperNode [2022-11-21 09:03:55,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:03:55,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:03:55,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:03:55,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:03:55,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,652 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-11-21 09:03:55,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:03:55,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:03:55,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:03:55,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:03:55,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,676 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:03:55,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:03:55,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:03:55,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:03:55,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (1/1) ... [2022-11-21 09:03:55,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:03:55,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:03:55,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:03:55,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:03:55,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:03:55,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 09:03:55,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 09:03:55,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 09:03:55,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 09:03:55,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 09:03:55,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 09:03:55,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 09:03:55,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 09:03:55,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 09:03:55,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:03:55,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:03:55,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 09:03:55,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 09:03:55,778 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 09:03:55,910 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:03:55,913 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:03:56,175 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:03:56,216 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:03:56,217 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 09:03:56,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:03:56 BoogieIcfgContainer [2022-11-21 09:03:56,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:03:56,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:03:56,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:03:56,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:03:56,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:03:55" (1/3) ... [2022-11-21 09:03:56,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320793ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:03:56, skipping insertion in model container [2022-11-21 09:03:56,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:03:55" (2/3) ... [2022-11-21 09:03:56,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320793ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:03:56, skipping insertion in model container [2022-11-21 09:03:56,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:03:56" (3/3) ... [2022-11-21 09:03:56,229 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-11-21 09:03:56,236 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 09:03:56,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:03:56,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 09:03:56,245 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 09:03:56,301 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 09:03:56,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-11-21 09:03:56,395 INFO L130 PetriNetUnfolder]: 6/84 cut-off events. [2022-11-21 09:03:56,396 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 09:03:56,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 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. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-21 09:03:56,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-11-21 09:03:56,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-11-21 09:03:56,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:03:56,438 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;@5e65ea1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:03:56,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 09:03:56,465 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2022-11-21 09:03:56,466 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 09:03:56,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:03:56,467 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] [2022-11-21 09:03:56,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:03:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:03:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash 975642243, now seen corresponding path program 1 times [2022-11-21 09:03:56,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:03:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594607431] [2022-11-21 09:03:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:03:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:03:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:03:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:03:56,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:03:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594607431] [2022-11-21 09:03:56,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594607431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:03:56,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:03:56,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:03:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32950581] [2022-11-21 09:03:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:03:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:03:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:03:56,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:03:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:03:56,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2022-11-21 09:03:56,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:56,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:03:56,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2022-11-21 09:03:56,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:03:56,822 INFO L130 PetriNetUnfolder]: 10/97 cut-off events. [2022-11-21 09:03:56,823 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-11-21 09:03:56,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-11-21 09:03:56,825 INFO L137 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2022-11-21 09:03:56,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2022-11-21 09:03:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:03:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 09:03:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2022-11-21 09:03:56,839 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2022-11-21 09:03:56,840 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2022-11-21 09:03:56,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2022-11-21 09:03:56,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:03:56,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2022-11-21 09:03:56,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:56,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:56,853 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:56,855 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2022-11-21 09:03:56,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2022-11-21 09:03:56,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 09:03:56,861 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2022-11-21 09:03:56,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-11-21 09:03:56,867 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-11-21 09:03:56,868 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2022-11-21 09:03:56,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:56,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:03:56,869 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] [2022-11-21 09:03:56,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 09:03:56,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:03:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:03:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -707015589, now seen corresponding path program 1 times [2022-11-21 09:03:56,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:03:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593596886] [2022-11-21 09:03:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:03:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:03:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:03:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:03:57,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:03:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593596886] [2022-11-21 09:03:57,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593596886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:03:57,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:03:57,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 09:03:57,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547325535] [2022-11-21 09:03:57,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:03:57,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 09:03:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:03:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 09:03:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:03:57,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 86 [2022-11-21 09:03:57,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 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) [2022-11-21 09:03:57,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:03:57,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 86 [2022-11-21 09:03:57,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:03:57,709 INFO L130 PetriNetUnfolder]: 62/188 cut-off events. [2022-11-21 09:03:57,709 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-21 09:03:57,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 188 events. 62/188 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 544 event pairs, 26 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 326. Up to 80 conditions per place. [2022-11-21 09:03:57,714 INFO L137 encePairwiseOnDemand]: 80/86 looper letters, 28 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2022-11-21 09:03:57,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 225 flow [2022-11-21 09:03:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 09:03:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 09:03:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2022-11-21 09:03:57,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2022-11-21 09:03:57,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 358 transitions. [2022-11-21 09:03:57,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 358 transitions. [2022-11-21 09:03:57,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:03:57,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 358 transitions. [2022-11-21 09:03:57,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:57,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:57,737 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:57,738 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 358 transitions. [2022-11-21 09:03:57,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 225 flow [2022-11-21 09:03:57,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 09:03:57,743 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2022-11-21 09:03:57,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-11-21 09:03:57,746 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2022-11-21 09:03:57,747 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2022-11-21 09:03:57,747 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) [2022-11-21 09:03:57,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:03:57,749 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, 1, 1] [2022-11-21 09:03:57,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 09:03:57,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:03:57,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:03:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash 31782083, now seen corresponding path program 1 times [2022-11-21 09:03:57,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:03:57,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175274216] [2022-11-21 09:03:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:03:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:03:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:03:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 09:03:58,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:03:58,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175274216] [2022-11-21 09:03:58,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175274216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:03:58,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:03:58,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 09:03:58,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357025877] [2022-11-21 09:03:58,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:03:58,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 09:03:58,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:03:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 09:03:58,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:03:58,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2022-11-21 09:03:58,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:58,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:03:58,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2022-11-21 09:03:58,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:03:58,336 INFO L130 PetriNetUnfolder]: 44/170 cut-off events. [2022-11-21 09:03:58,336 INFO L131 PetriNetUnfolder]: For 16/22 co-relation queries the response was YES. [2022-11-21 09:03:58,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 170 events. 44/170 cut-off events. For 16/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 522 event pairs, 23 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 297. Up to 70 conditions per place. [2022-11-21 09:03:58,338 INFO L137 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-11-21 09:03:58,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 233 flow [2022-11-21 09:03:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 09:03:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 09:03:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2022-11-21 09:03:58,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2022-11-21 09:03:58,340 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2022-11-21 09:03:58,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2022-11-21 09:03:58,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:03:58,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2022-11-21 09:03:58,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:58,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:58,344 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:58,344 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 6 states and 366 transitions. [2022-11-21 09:03:58,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 233 flow [2022-11-21 09:03:58,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 225 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 09:03:58,346 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 170 flow [2022-11-21 09:03:58,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-11-21 09:03:58,348 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2022-11-21 09:03:58,348 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 170 flow [2022-11-21 09:03:58,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:03:58,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:03:58,349 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, 1, 1, 1, 1] [2022-11-21 09:03:58,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 09:03:58,349 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:03:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:03:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1873075449, now seen corresponding path program 1 times [2022-11-21 09:03:58,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:03:58,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106076456] [2022-11-21 09:03:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:03:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:03:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:03:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:03:58,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:03:58,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106076456] [2022-11-21 09:03:58,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106076456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:03:58,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138813246] [2022-11-21 09:03:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:03:58,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:03:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:03:58,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:03:58,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:03:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:03:58,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:03:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:03:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:03:59,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:00,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138813246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:00,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:00,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686579701] [2022-11-21 09:04:00,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:00,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:00,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:00,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:00,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:00,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 170 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:00,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:00,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:00,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:03,387 INFO L130 PetriNetUnfolder]: 258/823 cut-off events. [2022-11-21 09:04:03,387 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-21 09:04:03,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 823 events. 258/823 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4942 event pairs, 2 based on Foata normal form. 4/826 useless extension candidates. Maximal degree in co-relation 1753. Up to 155 conditions per place. [2022-11-21 09:04:03,394 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 134 selfloop transitions, 117 changer transitions 49/341 dead transitions. [2022-11-21 09:04:03,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 341 transitions, 1630 flow [2022-11-21 09:04:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-21 09:04:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-21 09:04:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3541 transitions. [2022-11-21 09:04:03,403 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6433502906976745 [2022-11-21 09:04:03,403 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3541 transitions. [2022-11-21 09:04:03,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3541 transitions. [2022-11-21 09:04:03,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:03,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3541 transitions. [2022-11-21 09:04:03,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.328125) internal successors, (3541), 64 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:03,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:03,427 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:03,427 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 170 flow. Second operand 64 states and 3541 transitions. [2022-11-21 09:04:03,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 341 transitions, 1630 flow [2022-11-21 09:04:03,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 341 transitions, 1580 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 09:04:03,436 INFO L231 Difference]: Finished difference. Result has 168 places, 202 transitions, 991 flow [2022-11-21 09:04:03,436 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=991, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2022-11-21 09:04:03,437 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2022-11-21 09:04:03,437 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 991 flow [2022-11-21 09:04:03,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:03,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:03,438 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, 1, 1, 1, 1] [2022-11-21 09:04:03,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:03,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:03,645 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1569915595, now seen corresponding path program 2 times [2022-11-21 09:04:03,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:03,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506949739] [2022-11-21 09:04:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:03,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:04,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:04,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506949739] [2022-11-21 09:04:04,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506949739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:04,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136180712] [2022-11-21 09:04:04,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:04:04,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:04,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:04,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:04:04,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:04:04,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:04:04,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:04,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:04,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:05,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136180712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:05,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:05,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-21 09:04:05,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828620477] [2022-11-21 09:04:05,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:05,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 09:04:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 09:04:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-11-21 09:04:05,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:05,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 991 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:05,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:05,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:05,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:10,715 INFO L130 PetriNetUnfolder]: 452/1595 cut-off events. [2022-11-21 09:04:10,716 INFO L131 PetriNetUnfolder]: For 3905/3905 co-relation queries the response was YES. [2022-11-21 09:04:10,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5259 conditions, 1595 events. 452/1595 cut-off events. For 3905/3905 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12083 event pairs, 43 based on Foata normal form. 9/1599 useless extension candidates. Maximal degree in co-relation 5223. Up to 381 conditions per place. [2022-11-21 09:04:10,737 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 227 selfloop transitions, 266 changer transitions 56/590 dead transitions. [2022-11-21 09:04:10,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 590 transitions, 4581 flow [2022-11-21 09:04:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-21 09:04:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-21 09:04:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4757 transitions. [2022-11-21 09:04:10,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6357925688318632 [2022-11-21 09:04:10,751 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4757 transitions. [2022-11-21 09:04:10,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4757 transitions. [2022-11-21 09:04:10,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:10,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4757 transitions. [2022-11-21 09:04:10,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 54.67816091954023) internal successors, (4757), 87 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:10,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:10,790 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:10,791 INFO L175 Difference]: Start difference. First operand has 168 places, 202 transitions, 991 flow. Second operand 87 states and 4757 transitions. [2022-11-21 09:04:10,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 590 transitions, 4581 flow [2022-11-21 09:04:10,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 590 transitions, 4047 flow, removed 248 selfloop flow, removed 16 redundant places. [2022-11-21 09:04:10,842 INFO L231 Difference]: Finished difference. Result has 269 places, 428 transitions, 3374 flow [2022-11-21 09:04:10,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=3374, PETRI_PLACES=269, PETRI_TRANSITIONS=428} [2022-11-21 09:04:10,845 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 193 predicate places. [2022-11-21 09:04:10,846 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 428 transitions, 3374 flow [2022-11-21 09:04:10,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:10,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:10,847 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, 1, 1, 1, 1] [2022-11-21 09:04:10,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 09:04:11,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:11,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:11,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1618685851, now seen corresponding path program 3 times [2022-11-21 09:04:11,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:11,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524472713] [2022-11-21 09:04:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:11,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:11,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524472713] [2022-11-21 09:04:11,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524472713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548927305] [2022-11-21 09:04:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:04:11,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:11,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:11,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:11,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 09:04:11,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 09:04:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:04:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:11,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:12,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:12,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548927305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:12,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:12,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:12,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128047381] [2022-11-21 09:04:12,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:12,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:12,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:12,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:12,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:12,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 428 transitions, 3374 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:12,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:12,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:12,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:17,725 INFO L130 PetriNetUnfolder]: 490/1649 cut-off events. [2022-11-21 09:04:17,725 INFO L131 PetriNetUnfolder]: For 15317/15317 co-relation queries the response was YES. [2022-11-21 09:04:17,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7787 conditions, 1649 events. 490/1649 cut-off events. For 15317/15317 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12374 event pairs, 15 based on Foata normal form. 2/1648 useless extension candidates. Maximal degree in co-relation 7716. Up to 315 conditions per place. [2022-11-21 09:04:17,746 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 190 selfloop transitions, 394 changer transitions 32/657 dead transitions. [2022-11-21 09:04:17,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 657 transitions, 7175 flow [2022-11-21 09:04:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-21 09:04:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-21 09:04:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4564 transitions. [2022-11-21 09:04:17,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6393947884561502 [2022-11-21 09:04:17,755 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4564 transitions. [2022-11-21 09:04:17,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4564 transitions. [2022-11-21 09:04:17,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:17,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4564 transitions. [2022-11-21 09:04:17,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 54.98795180722892) internal successors, (4564), 83 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:17,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:17,779 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:17,780 INFO L175 Difference]: Start difference. First operand has 269 places, 428 transitions, 3374 flow. Second operand 83 states and 4564 transitions. [2022-11-21 09:04:17,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 657 transitions, 7175 flow [2022-11-21 09:04:17,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 657 transitions, 6691 flow, removed 242 selfloop flow, removed 12 redundant places. [2022-11-21 09:04:17,905 INFO L231 Difference]: Finished difference. Result has 338 places, 522 transitions, 4999 flow [2022-11-21 09:04:17,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=4999, PETRI_PLACES=338, PETRI_TRANSITIONS=522} [2022-11-21 09:04:17,907 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 262 predicate places. [2022-11-21 09:04:17,907 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 522 transitions, 4999 flow [2022-11-21 09:04:17,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:17,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:17,908 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, 1, 1, 1, 1] [2022-11-21 09:04:17,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:18,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:18,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:18,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:18,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2101775999, now seen corresponding path program 4 times [2022-11-21 09:04:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:18,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377704895] [2022-11-21 09:04:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:18,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:18,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377704895] [2022-11-21 09:04:18,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377704895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:18,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274730114] [2022-11-21 09:04:18,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:04:18,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:18,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:18,533 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:18,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 09:04:18,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:04:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:04:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:19,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:19,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274730114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:19,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:19,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:19,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807008025] [2022-11-21 09:04:19,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:19,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:19,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:19,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:19,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 522 transitions, 4999 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:19,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:19,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:19,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:24,284 INFO L130 PetriNetUnfolder]: 650/2178 cut-off events. [2022-11-21 09:04:24,284 INFO L131 PetriNetUnfolder]: For 24694/24694 co-relation queries the response was YES. [2022-11-21 09:04:24,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11469 conditions, 2178 events. 650/2178 cut-off events. For 24694/24694 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17530 event pairs, 23 based on Foata normal form. 3/2178 useless extension candidates. Maximal degree in co-relation 11393. Up to 427 conditions per place. [2022-11-21 09:04:24,314 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 299 selfloop transitions, 484 changer transitions 24/848 dead transitions. [2022-11-21 09:04:24,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 848 transitions, 10549 flow [2022-11-21 09:04:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-21 09:04:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-21 09:04:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4335 transitions. [2022-11-21 09:04:24,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6462432915921288 [2022-11-21 09:04:24,323 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4335 transitions. [2022-11-21 09:04:24,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4335 transitions. [2022-11-21 09:04:24,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:24,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4335 transitions. [2022-11-21 09:04:24,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 55.57692307692308) internal successors, (4335), 78 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:24,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:24,346 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:24,346 INFO L175 Difference]: Start difference. First operand has 338 places, 522 transitions, 4999 flow. Second operand 78 states and 4335 transitions. [2022-11-21 09:04:24,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 848 transitions, 10549 flow [2022-11-21 09:04:24,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 848 transitions, 9655 flow, removed 201 selfloop flow, removed 40 redundant places. [2022-11-21 09:04:24,523 INFO L231 Difference]: Finished difference. Result has 391 places, 664 transitions, 7404 flow [2022-11-21 09:04:24,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7404, PETRI_PLACES=391, PETRI_TRANSITIONS=664} [2022-11-21 09:04:24,525 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 315 predicate places. [2022-11-21 09:04:24,525 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 664 transitions, 7404 flow [2022-11-21 09:04:24,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:24,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:24,526 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, 1, 1, 1, 1] [2022-11-21 09:04:24,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:24,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:24,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash 510780421, now seen corresponding path program 5 times [2022-11-21 09:04:24,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:24,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653242757] [2022-11-21 09:04:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:25,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:25,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653242757] [2022-11-21 09:04:25,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653242757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:25,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54972776] [2022-11-21 09:04:25,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:04:25,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:25,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:25,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:25,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 09:04:25,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:04:25,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:04:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:25,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:25,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:26,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54972776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:26,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:26,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661252201] [2022-11-21 09:04:26,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:26,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:26,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:26,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:26,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 664 transitions, 7404 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:26,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:26,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:26,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:31,818 INFO L130 PetriNetUnfolder]: 665/2221 cut-off events. [2022-11-21 09:04:31,818 INFO L131 PetriNetUnfolder]: For 37489/37489 co-relation queries the response was YES. [2022-11-21 09:04:31,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13155 conditions, 2221 events. 665/2221 cut-off events. For 37489/37489 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17958 event pairs, 27 based on Foata normal form. 5/2222 useless extension candidates. Maximal degree in co-relation 13060. Up to 425 conditions per place. [2022-11-21 09:04:31,854 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 249 selfloop transitions, 523 changer transitions 35/848 dead transitions. [2022-11-21 09:04:31,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 848 transitions, 11873 flow [2022-11-21 09:04:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-21 09:04:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-11-21 09:04:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 5073 transitions. [2022-11-21 09:04:31,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6411779575328614 [2022-11-21 09:04:31,864 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 5073 transitions. [2022-11-21 09:04:31,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 5073 transitions. [2022-11-21 09:04:31,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:31,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 5073 transitions. [2022-11-21 09:04:31,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 55.141304347826086) internal successors, (5073), 92 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:31,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:31,903 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:31,903 INFO L175 Difference]: Start difference. First operand has 391 places, 664 transitions, 7404 flow. Second operand 92 states and 5073 transitions. [2022-11-21 09:04:31,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 848 transitions, 11873 flow [2022-11-21 09:04:32,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 848 transitions, 11067 flow, removed 283 selfloop flow, removed 32 redundant places. [2022-11-21 09:04:32,300 INFO L231 Difference]: Finished difference. Result has 461 places, 689 transitions, 8557 flow [2022-11-21 09:04:32,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=8557, PETRI_PLACES=461, PETRI_TRANSITIONS=689} [2022-11-21 09:04:32,302 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 385 predicate places. [2022-11-21 09:04:32,302 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 689 transitions, 8557 flow [2022-11-21 09:04:32,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:32,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:32,303 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, 1, 1, 1, 1] [2022-11-21 09:04:32,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:32,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:32,508 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1925482755, now seen corresponding path program 6 times [2022-11-21 09:04:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:32,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078594033] [2022-11-21 09:04:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:32,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:32,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078594033] [2022-11-21 09:04:32,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078594033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:32,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812304302] [2022-11-21 09:04:32,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:04:32,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:32,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:32,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 09:04:33,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 09:04:33,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:04:33,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:33,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:34,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812304302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:34,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:34,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825199285] [2022-11-21 09:04:34,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:34,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:34,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 689 transitions, 8557 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:34,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:34,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:34,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:37,363 INFO L130 PetriNetUnfolder]: 877/2830 cut-off events. [2022-11-21 09:04:37,364 INFO L131 PetriNetUnfolder]: For 47028/47028 co-relation queries the response was YES. [2022-11-21 09:04:37,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17740 conditions, 2830 events. 877/2830 cut-off events. For 47028/47028 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24194 event pairs, 60 based on Foata normal form. 2/2827 useless extension candidates. Maximal degree in co-relation 17634. Up to 924 conditions per place. [2022-11-21 09:04:37,413 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 320 selfloop transitions, 679 changer transitions 15/1055 dead transitions. [2022-11-21 09:04:37,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1055 transitions, 15934 flow [2022-11-21 09:04:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 09:04:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-11-21 09:04:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3245 transitions. [2022-11-21 09:04:37,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2022-11-21 09:04:37,419 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3245 transitions. [2022-11-21 09:04:37,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3245 transitions. [2022-11-21 09:04:37,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:37,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3245 transitions. [2022-11-21 09:04:37,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 55.0) internal successors, (3245), 59 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:37,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 86.0) internal successors, (5160), 60 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:37,434 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 86.0) internal successors, (5160), 60 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:37,434 INFO L175 Difference]: Start difference. First operand has 461 places, 689 transitions, 8557 flow. Second operand 59 states and 3245 transitions. [2022-11-21 09:04:37,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1055 transitions, 15934 flow [2022-11-21 09:04:37,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1055 transitions, 14828 flow, removed 127 selfloop flow, removed 66 redundant places. [2022-11-21 09:04:37,771 INFO L231 Difference]: Finished difference. Result has 460 places, 954 transitions, 13741 flow [2022-11-21 09:04:37,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=13741, PETRI_PLACES=460, PETRI_TRANSITIONS=954} [2022-11-21 09:04:37,773 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 384 predicate places. [2022-11-21 09:04:37,773 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 954 transitions, 13741 flow [2022-11-21 09:04:37,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:37,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:37,774 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, 1, 1, 1, 1] [2022-11-21 09:04:37,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-21 09:04:37,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:37,980 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1043953735, now seen corresponding path program 7 times [2022-11-21 09:04:37,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:37,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082143150] [2022-11-21 09:04:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:37,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:38,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:38,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082143150] [2022-11-21 09:04:38,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082143150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:38,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099509781] [2022-11-21 09:04:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:04:38,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:38,471 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:38,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 09:04:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:39,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:39,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099509781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:39,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:39,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:39,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932213832] [2022-11-21 09:04:39,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:39,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:39,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:39,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 954 transitions, 13741 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:39,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:39,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:39,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:43,874 INFO L130 PetriNetUnfolder]: 973/3125 cut-off events. [2022-11-21 09:04:43,875 INFO L131 PetriNetUnfolder]: For 56343/56343 co-relation queries the response was YES. [2022-11-21 09:04:43,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21001 conditions, 3125 events. 973/3125 cut-off events. For 56343/56343 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27531 event pairs, 53 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 20887. Up to 929 conditions per place. [2022-11-21 09:04:44,006 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 318 selfloop transitions, 828 changer transitions 20/1207 dead transitions. [2022-11-21 09:04:44,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1207 transitions, 20147 flow [2022-11-21 09:04:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-21 09:04:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-21 09:04:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3758 transitions. [2022-11-21 09:04:44,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6426128590971272 [2022-11-21 09:04:44,011 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3758 transitions. [2022-11-21 09:04:44,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3758 transitions. [2022-11-21 09:04:44,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:44,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3758 transitions. [2022-11-21 09:04:44,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.26470588235294) internal successors, (3758), 68 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:44,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:44,040 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:44,040 INFO L175 Difference]: Start difference. First operand has 460 places, 954 transitions, 13741 flow. Second operand 68 states and 3758 transitions. [2022-11-21 09:04:44,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1207 transitions, 20147 flow [2022-11-21 09:04:44,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1207 transitions, 19252 flow, removed 317 selfloop flow, removed 23 redundant places. [2022-11-21 09:04:44,589 INFO L231 Difference]: Finished difference. Result has 518 places, 1098 transitions, 17745 flow [2022-11-21 09:04:44,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=13017, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=17745, PETRI_PLACES=518, PETRI_TRANSITIONS=1098} [2022-11-21 09:04:44,591 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 442 predicate places. [2022-11-21 09:04:44,591 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1098 transitions, 17745 flow [2022-11-21 09:04:44,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:44,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:44,592 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, 1, 1, 1, 1] [2022-11-21 09:04:44,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:44,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 09:04:44,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1347790129, now seen corresponding path program 8 times [2022-11-21 09:04:44,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:44,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78005325] [2022-11-21 09:04:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:44,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:45,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78005325] [2022-11-21 09:04:45,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78005325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062586721] [2022-11-21 09:04:45,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:04:45,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:45,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:45,176 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:45,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 09:04:45,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:04:45,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:04:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:45,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:46,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062586721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:46,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:46,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:46,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481387464] [2022-11-21 09:04:46,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:46,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:46,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:46,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:46,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:46,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1098 transitions, 17745 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:46,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:46,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:46,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:50,113 INFO L130 PetriNetUnfolder]: 964/3093 cut-off events. [2022-11-21 09:04:50,113 INFO L131 PetriNetUnfolder]: For 63547/63547 co-relation queries the response was YES. [2022-11-21 09:04:50,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21722 conditions, 3093 events. 964/3093 cut-off events. For 63547/63547 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 27168 event pairs, 68 based on Foata normal form. 2/3090 useless extension candidates. Maximal degree in co-relation 21602. Up to 880 conditions per place. [2022-11-21 09:04:50,152 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 378 selfloop transitions, 751 changer transitions 17/1187 dead transitions. [2022-11-21 09:04:50,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1187 transitions, 21538 flow [2022-11-21 09:04:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-21 09:04:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-21 09:04:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3414 transitions. [2022-11-21 09:04:50,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.640285071267817 [2022-11-21 09:04:50,157 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3414 transitions. [2022-11-21 09:04:50,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3414 transitions. [2022-11-21 09:04:50,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:50,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3414 transitions. [2022-11-21 09:04:50,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 55.064516129032256) internal successors, (3414), 62 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:50,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:50,173 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:50,173 INFO L175 Difference]: Start difference. First operand has 518 places, 1098 transitions, 17745 flow. Second operand 62 states and 3414 transitions. [2022-11-21 09:04:50,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1187 transitions, 21538 flow [2022-11-21 09:04:50,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 1187 transitions, 20573 flow, removed 178 selfloop flow, removed 41 redundant places. [2022-11-21 09:04:50,895 INFO L231 Difference]: Finished difference. Result has 542 places, 1108 transitions, 18601 flow [2022-11-21 09:04:50,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=16823, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=739, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=18601, PETRI_PLACES=542, PETRI_TRANSITIONS=1108} [2022-11-21 09:04:50,897 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 466 predicate places. [2022-11-21 09:04:50,897 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 1108 transitions, 18601 flow [2022-11-21 09:04:50,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:50,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:50,898 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, 1, 1, 1, 1] [2022-11-21 09:04:50,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:51,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:51,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1779040675, now seen corresponding path program 9 times [2022-11-21 09:04:51,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:51,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501270140] [2022-11-21 09:04:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:51,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501270140] [2022-11-21 09:04:51,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501270140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811447839] [2022-11-21 09:04:51,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:04:51,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:51,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:51,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:51,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 09:04:51,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:04:51,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:04:51,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:52,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:52,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811447839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:52,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:52,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017751080] [2022-11-21 09:04:52,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:52,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:52,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:52,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:52,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:52,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:52,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 1108 transitions, 18601 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:52,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:52,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:52,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:55,690 INFO L130 PetriNetUnfolder]: 1042/3297 cut-off events. [2022-11-21 09:04:55,690 INFO L131 PetriNetUnfolder]: For 69365/69365 co-relation queries the response was YES. [2022-11-21 09:04:55,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24306 conditions, 3297 events. 1042/3297 cut-off events. For 69365/69365 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 29311 event pairs, 72 based on Foata normal form. 1/3293 useless extension candidates. Maximal degree in co-relation 24181. Up to 1404 conditions per place. [2022-11-21 09:04:55,743 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 525 selfloop transitions, 717 changer transitions 9/1292 dead transitions. [2022-11-21 09:04:55,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1292 transitions, 24208 flow [2022-11-21 09:04:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-21 09:04:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-21 09:04:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2314 transitions. [2022-11-21 09:04:55,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6406423034330011 [2022-11-21 09:04:55,749 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2314 transitions. [2022-11-21 09:04:55,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2314 transitions. [2022-11-21 09:04:55,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:55,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2314 transitions. [2022-11-21 09:04:55,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.095238095238095) internal successors, (2314), 42 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:55,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:55,762 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:55,762 INFO L175 Difference]: Start difference. First operand has 542 places, 1108 transitions, 18601 flow. Second operand 42 states and 2314 transitions. [2022-11-21 09:04:55,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1292 transitions, 24208 flow [2022-11-21 09:04:56,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1292 transitions, 23717 flow, removed 48 selfloop flow, removed 36 redundant places. [2022-11-21 09:04:56,498 INFO L231 Difference]: Finished difference. Result has 556 places, 1230 transitions, 22944 flow [2022-11-21 09:04:56,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=18188, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=22944, PETRI_PLACES=556, PETRI_TRANSITIONS=1230} [2022-11-21 09:04:56,500 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 480 predicate places. [2022-11-21 09:04:56,501 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1230 transitions, 22944 flow [2022-11-21 09:04:56,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:56,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:56,502 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, 1, 1, 1, 1] [2022-11-21 09:04:56,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:56,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 09:04:56,708 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:04:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash -881035819, now seen corresponding path program 10 times [2022-11-21 09:04:56,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:56,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068123234] [2022-11-21 09:04:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:57,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:57,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068123234] [2022-11-21 09:04:57,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068123234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:57,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408103619] [2022-11-21 09:04:57,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:04:57,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:57,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:57,108 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:57,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 09:04:57,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:04:57,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:04:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:04:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:57,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:58,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408103619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:58,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:58,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:04:58,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501966954] [2022-11-21 09:04:58,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:58,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:04:58,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:04:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:04:58,284 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:04:58,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1230 transitions, 22944 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:58,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:58,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:04:58,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:02,092 INFO L130 PetriNetUnfolder]: 1083/3436 cut-off events. [2022-11-21 09:05:02,093 INFO L131 PetriNetUnfolder]: For 77849/77849 co-relation queries the response was YES. [2022-11-21 09:05:02,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27241 conditions, 3436 events. 1083/3436 cut-off events. For 77849/77849 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 30953 event pairs, 72 based on Foata normal form. 1/3432 useless extension candidates. Maximal degree in co-relation 27110. Up to 1317 conditions per place. [2022-11-21 09:05:02,137 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 460 selfloop transitions, 856 changer transitions 13/1370 dead transitions. [2022-11-21 09:05:02,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1370 transitions, 28294 flow [2022-11-21 09:05:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-21 09:05:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-21 09:05:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2814 transitions. [2022-11-21 09:05:02,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6415868673050615 [2022-11-21 09:05:02,148 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2814 transitions. [2022-11-21 09:05:02,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2814 transitions. [2022-11-21 09:05:02,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:02,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2814 transitions. [2022-11-21 09:05:02,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.1764705882353) internal successors, (2814), 51 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:02,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:02,163 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:02,163 INFO L175 Difference]: Start difference. First operand has 556 places, 1230 transitions, 22944 flow. Second operand 51 states and 2814 transitions. [2022-11-21 09:05:02,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1370 transitions, 28294 flow [2022-11-21 09:05:03,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1370 transitions, 28132 flow, removed 62 selfloop flow, removed 9 redundant places. [2022-11-21 09:05:03,175 INFO L231 Difference]: Finished difference. Result has 606 places, 1288 transitions, 26273 flow [2022-11-21 09:05:03,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22808, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=26273, PETRI_PLACES=606, PETRI_TRANSITIONS=1288} [2022-11-21 09:05:03,177 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 530 predicate places. [2022-11-21 09:05:03,177 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 1288 transitions, 26273 flow [2022-11-21 09:05:03,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:03,178 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:03,178 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, 1, 1, 1, 1] [2022-11-21 09:05:03,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-21 09:05:03,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:03,379 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1729021351, now seen corresponding path program 11 times [2022-11-21 09:05:03,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:03,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892516516] [2022-11-21 09:05:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:03,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:03,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892516516] [2022-11-21 09:05:03,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892516516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:03,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450191025] [2022-11-21 09:05:03,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:05:03,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:03,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:03,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 09:05:03,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-21 09:05:03,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:03,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:05:03,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:04,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:04,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450191025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:04,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:04,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:05:04,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269620745] [2022-11-21 09:05:04,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:04,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:05:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:05:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:05:04,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:05:04,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1288 transitions, 26273 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:04,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:04,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:05:04,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:08,640 INFO L130 PetriNetUnfolder]: 1129/3560 cut-off events. [2022-11-21 09:05:08,640 INFO L131 PetriNetUnfolder]: For 91819/91819 co-relation queries the response was YES. [2022-11-21 09:05:08,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30370 conditions, 3560 events. 1129/3560 cut-off events. For 91819/91819 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 32257 event pairs, 69 based on Foata normal form. 1/3554 useless extension candidates. Maximal degree in co-relation 30229. Up to 1429 conditions per place. [2022-11-21 09:05:08,688 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 503 selfloop transitions, 943 changer transitions 9/1496 dead transitions. [2022-11-21 09:05:08,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1496 transitions, 33318 flow [2022-11-21 09:05:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-21 09:05:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-21 09:05:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2799 transitions. [2022-11-21 09:05:08,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6381668946648427 [2022-11-21 09:05:08,693 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2799 transitions. [2022-11-21 09:05:08,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2799 transitions. [2022-11-21 09:05:08,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:08,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2799 transitions. [2022-11-21 09:05:08,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 54.88235294117647) internal successors, (2799), 51 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:08,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:08,707 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:08,707 INFO L175 Difference]: Start difference. First operand has 606 places, 1288 transitions, 26273 flow. Second operand 51 states and 2799 transitions. [2022-11-21 09:05:08,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1496 transitions, 33318 flow [2022-11-21 09:05:09,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1496 transitions, 32484 flow, removed 118 selfloop flow, removed 32 redundant places. [2022-11-21 09:05:09,987 INFO L231 Difference]: Finished difference. Result has 638 places, 1418 transitions, 31601 flow [2022-11-21 09:05:09,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=25495, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=31601, PETRI_PLACES=638, PETRI_TRANSITIONS=1418} [2022-11-21 09:05:09,989 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 562 predicate places. [2022-11-21 09:05:09,990 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 1418 transitions, 31601 flow [2022-11-21 09:05:09,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:09,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:09,992 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, 1, 1, 1, 1] [2022-11-21 09:05:09,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:10,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 09:05:10,197 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1361499201, now seen corresponding path program 12 times [2022-11-21 09:05:10,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:10,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584411387] [2022-11-21 09:05:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:10,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:10,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:10,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584411387] [2022-11-21 09:05:10,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584411387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:10,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839709779] [2022-11-21 09:05:10,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:05:10,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:10,605 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:10,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 09:05:10,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 09:05:10,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:10,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:05:10,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:11,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:11,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839709779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:11,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:11,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:05:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641081286] [2022-11-21 09:05:11,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:11,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:05:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:05:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:05:11,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:05:11,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 1418 transitions, 31601 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:11,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:11,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:05:11,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:16,192 INFO L130 PetriNetUnfolder]: 1160/3664 cut-off events. [2022-11-21 09:05:16,193 INFO L131 PetriNetUnfolder]: For 106790/106790 co-relation queries the response was YES. [2022-11-21 09:05:16,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33584 conditions, 3664 events. 1160/3664 cut-off events. For 106790/106790 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 33474 event pairs, 73 based on Foata normal form. 1/3659 useless extension candidates. Maximal degree in co-relation 33429. Up to 1359 conditions per place. [2022-11-21 09:05:16,242 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 466 selfloop transitions, 1044 changer transitions 14/1565 dead transitions. [2022-11-21 09:05:16,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 1565 transitions, 37802 flow [2022-11-21 09:05:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-21 09:05:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-21 09:05:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3195 transitions. [2022-11-21 09:05:16,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6405372894947875 [2022-11-21 09:05:16,247 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3195 transitions. [2022-11-21 09:05:16,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3195 transitions. [2022-11-21 09:05:16,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:16,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3195 transitions. [2022-11-21 09:05:16,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.08620689655172) internal successors, (3195), 58 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:16,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:16,257 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:16,257 INFO L175 Difference]: Start difference. First operand has 638 places, 1418 transitions, 31601 flow. Second operand 58 states and 3195 transitions. [2022-11-21 09:05:16,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 1565 transitions, 37802 flow [2022-11-21 09:05:17,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 1565 transitions, 37343 flow, removed 121 selfloop flow, removed 19 redundant places. [2022-11-21 09:05:17,876 INFO L231 Difference]: Finished difference. Result has 685 places, 1466 transitions, 34869 flow [2022-11-21 09:05:17,877 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=31172, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=34869, PETRI_PLACES=685, PETRI_TRANSITIONS=1466} [2022-11-21 09:05:17,878 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 609 predicate places. [2022-11-21 09:05:17,878 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 1466 transitions, 34869 flow [2022-11-21 09:05:17,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:17,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:17,879 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, 1, 1, 1, 1] [2022-11-21 09:05:17,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:18,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 09:05:18,084 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:18,085 INFO L85 PathProgramCache]: Analyzing trace with hash -458555649, now seen corresponding path program 13 times [2022-11-21 09:05:18,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:18,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601285757] [2022-11-21 09:05:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:18,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:18,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601285757] [2022-11-21 09:05:18,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601285757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742624663] [2022-11-21 09:05:18,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:05:18,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:18,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:18,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:18,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 09:05:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:18,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:05:18,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:19,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:19,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742624663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:19,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:19,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:05:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222984333] [2022-11-21 09:05:19,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:19,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:05:19,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:05:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:05:19,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:05:19,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 1466 transitions, 34869 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:19,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:19,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:05:19,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:24,696 INFO L130 PetriNetUnfolder]: 1166/3712 cut-off events. [2022-11-21 09:05:24,697 INFO L131 PetriNetUnfolder]: For 120917/120917 co-relation queries the response was YES. [2022-11-21 09:05:24,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35665 conditions, 3712 events. 1166/3712 cut-off events. For 120917/120917 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 34158 event pairs, 74 based on Foata normal form. 1/3707 useless extension candidates. Maximal degree in co-relation 35502. Up to 1517 conditions per place. [2022-11-21 09:05:24,751 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 619 selfloop transitions, 922 changer transitions 9/1591 dead transitions. [2022-11-21 09:05:24,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 1591 transitions, 40547 flow [2022-11-21 09:05:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 09:05:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-21 09:05:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2688 transitions. [2022-11-21 09:05:24,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2022-11-21 09:05:24,755 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2688 transitions. [2022-11-21 09:05:24,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2688 transitions. [2022-11-21 09:05:24,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:24,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2688 transitions. [2022-11-21 09:05:24,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.857142857142854) internal successors, (2688), 49 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:24,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:24,767 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:24,767 INFO L175 Difference]: Start difference. First operand has 685 places, 1466 transitions, 34869 flow. Second operand 49 states and 2688 transitions. [2022-11-21 09:05:24,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 1591 transitions, 40547 flow [2022-11-21 09:05:26,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 1591 transitions, 39329 flow, removed 169 selfloop flow, removed 34 redundant places. [2022-11-21 09:05:26,141 INFO L231 Difference]: Finished difference. Result has 710 places, 1514 transitions, 37959 flow [2022-11-21 09:05:26,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=33689, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=875, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=37959, PETRI_PLACES=710, PETRI_TRANSITIONS=1514} [2022-11-21 09:05:26,144 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 634 predicate places. [2022-11-21 09:05:26,144 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 1514 transitions, 37959 flow [2022-11-21 09:05:26,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:26,144 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:26,145 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, 1, 1, 1, 1] [2022-11-21 09:05:26,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:26,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 09:05:26,351 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:26,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 481243395, now seen corresponding path program 14 times [2022-11-21 09:05:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842909151] [2022-11-21 09:05:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:26,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:26,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842909151] [2022-11-21 09:05:26,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842909151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:26,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788934690] [2022-11-21 09:05:26,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:05:26,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:26,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:26,755 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:26,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 09:05:26,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:05:26,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:05:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:27,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:27,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788934690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:27,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:27,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:05:27,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701894600] [2022-11-21 09:05:27,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:27,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:05:27,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:05:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:05:27,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:05:27,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 1514 transitions, 37959 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:27,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:27,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:05:27,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:32,566 INFO L130 PetriNetUnfolder]: 1166/3680 cut-off events. [2022-11-21 09:05:32,566 INFO L131 PetriNetUnfolder]: For 130965/130965 co-relation queries the response was YES. [2022-11-21 09:05:32,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37226 conditions, 3680 events. 1166/3680 cut-off events. For 130965/130965 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33663 event pairs, 80 based on Foata normal form. 1/3675 useless extension candidates. Maximal degree in co-relation 37053. Up to 1354 conditions per place. [2022-11-21 09:05:32,625 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 675 selfloop transitions, 863 changer transitions 11/1590 dead transitions. [2022-11-21 09:05:32,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 1590 transitions, 42412 flow [2022-11-21 09:05:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-21 09:05:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-21 09:05:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2215 transitions. [2022-11-21 09:05:32,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6438953488372093 [2022-11-21 09:05:32,629 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2215 transitions. [2022-11-21 09:05:32,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2215 transitions. [2022-11-21 09:05:32,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:32,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2215 transitions. [2022-11-21 09:05:32,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.375) internal successors, (2215), 40 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,638 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,638 INFO L175 Difference]: Start difference. First operand has 710 places, 1514 transitions, 37959 flow. Second operand 40 states and 2215 transitions. [2022-11-21 09:05:32,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 1590 transitions, 42412 flow [2022-11-21 09:05:34,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 1590 transitions, 42059 flow, removed 62 selfloop flow, removed 23 redundant places. [2022-11-21 09:05:34,415 INFO L231 Difference]: Finished difference. Result has 728 places, 1520 transitions, 39583 flow [2022-11-21 09:05:34,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=37623, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=856, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=39583, PETRI_PLACES=728, PETRI_TRANSITIONS=1520} [2022-11-21 09:05:34,417 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 652 predicate places. [2022-11-21 09:05:34,417 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 1520 transitions, 39583 flow [2022-11-21 09:05:34,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:34,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:34,418 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, 1, 1, 1, 1] [2022-11-21 09:05:34,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:34,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 09:05:34,624 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1636260209, now seen corresponding path program 15 times [2022-11-21 09:05:34,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:34,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60288979] [2022-11-21 09:05:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:34,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:35,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:35,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60288979] [2022-11-21 09:05:35,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60288979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:35,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895511028] [2022-11-21 09:05:35,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:05:35,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:35,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:35,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:35,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 09:05:35,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:05:35,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:05:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:35,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:36,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895511028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:36,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:36,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:05:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658198668] [2022-11-21 09:05:36,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:05:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:36,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:05:36,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:05:36,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:05:36,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1520 transitions, 39583 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:36,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:05:36,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:41,593 INFO L130 PetriNetUnfolder]: 1193/3777 cut-off events. [2022-11-21 09:05:41,593 INFO L131 PetriNetUnfolder]: For 141435/141435 co-relation queries the response was YES. [2022-11-21 09:05:41,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39423 conditions, 3777 events. 1193/3777 cut-off events. For 141435/141435 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 34853 event pairs, 71 based on Foata normal form. 1/3771 useless extension candidates. Maximal degree in co-relation 39249. Up to 1414 conditions per place. [2022-11-21 09:05:41,648 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 534 selfloop transitions, 1071 changer transitions 13/1659 dead transitions. [2022-11-21 09:05:41,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 1659 transitions, 46045 flow [2022-11-21 09:05:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-21 09:05:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-21 09:05:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3194 transitions. [2022-11-21 09:05:41,653 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.640336808340016 [2022-11-21 09:05:41,653 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3194 transitions. [2022-11-21 09:05:41,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3194 transitions. [2022-11-21 09:05:41,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:41,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3194 transitions. [2022-11-21 09:05:41,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.06896551724138) internal successors, (3194), 58 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:41,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:41,659 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:41,659 INFO L175 Difference]: Start difference. First operand has 728 places, 1520 transitions, 39583 flow. Second operand 58 states and 3194 transitions. [2022-11-21 09:05:41,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 1659 transitions, 46045 flow [2022-11-21 09:05:43,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 1659 transitions, 45096 flow, removed 58 selfloop flow, removed 31 redundant places. [2022-11-21 09:05:43,466 INFO L231 Difference]: Finished difference. Result has 762 places, 1563 transitions, 42610 flow [2022-11-21 09:05:43,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=38695, PETRI_DIFFERENCE_MINUEND_PLACES=692, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=42610, PETRI_PLACES=762, PETRI_TRANSITIONS=1563} [2022-11-21 09:05:43,467 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 686 predicate places. [2022-11-21 09:05:43,467 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 1563 transitions, 42610 flow [2022-11-21 09:05:43,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:43,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:43,468 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, 1, 1, 1, 1] [2022-11-21 09:05:43,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:43,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 09:05:43,668 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash -195787561, now seen corresponding path program 16 times [2022-11-21 09:05:43,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:43,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322028902] [2022-11-21 09:05:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:44,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:44,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322028902] [2022-11-21 09:05:44,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322028902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:44,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956951818] [2022-11-21 09:05:44,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:05:44,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:44,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:44,116 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:44,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 09:05:44,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:05:44,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:44,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:05:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:44,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:45,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956951818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:45,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:45,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:05:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622870492] [2022-11-21 09:05:45,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:45,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:05:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:05:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:05:45,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:05:45,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 1563 transitions, 42610 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:45,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:05:45,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:49,829 INFO L130 PetriNetUnfolder]: 1188/3746 cut-off events. [2022-11-21 09:05:49,829 INFO L131 PetriNetUnfolder]: For 150360/150360 co-relation queries the response was YES. [2022-11-21 09:05:49,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40770 conditions, 3746 events. 1188/3746 cut-off events. For 150360/150360 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34452 event pairs, 73 based on Foata normal form. 1/3741 useless extension candidates. Maximal degree in co-relation 40588. Up to 1326 conditions per place. [2022-11-21 09:05:49,890 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 679 selfloop transitions, 904 changer transitions 11/1635 dead transitions. [2022-11-21 09:05:49,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 1635 transitions, 47111 flow [2022-11-21 09:05:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-21 09:05:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-21 09:05:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2373 transitions. [2022-11-21 09:05:49,893 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6416982152514873 [2022-11-21 09:05:49,893 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2373 transitions. [2022-11-21 09:05:49,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2373 transitions. [2022-11-21 09:05:49,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:49,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2373 transitions. [2022-11-21 09:05:49,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.18604651162791) internal successors, (2373), 43 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:49,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:49,902 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:49,902 INFO L175 Difference]: Start difference. First operand has 762 places, 1563 transitions, 42610 flow. Second operand 43 states and 2373 transitions. [2022-11-21 09:05:49,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 1635 transitions, 47111 flow [2022-11-21 09:05:51,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 1635 transitions, 45956 flow, removed 158 selfloop flow, removed 31 redundant places. [2022-11-21 09:05:51,996 INFO L231 Difference]: Finished difference. Result has 774 places, 1565 transitions, 43411 flow [2022-11-21 09:05:51,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=41466, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=900, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=43411, PETRI_PLACES=774, PETRI_TRANSITIONS=1565} [2022-11-21 09:05:51,998 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 698 predicate places. [2022-11-21 09:05:51,998 INFO L495 AbstractCegarLoop]: Abstraction has has 774 places, 1565 transitions, 43411 flow [2022-11-21 09:05:51,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:51,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:51,998 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, 1, 1, 1, 1] [2022-11-21 09:05:52,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-21 09:05:52,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:52,199 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash -348746405, now seen corresponding path program 17 times [2022-11-21 09:05:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:52,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845546015] [2022-11-21 09:05:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:52,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845546015] [2022-11-21 09:05:52,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845546015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334689396] [2022-11-21 09:05:52,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:05:52,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:52,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:52,632 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:52,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 09:05:52,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:05:52,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:05:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:53,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:53,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334689396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:53,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:53,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-11-21 09:05:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254101495] [2022-11-21 09:05:53,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:53,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:05:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:53,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:05:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:05:53,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:05:53,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 1565 transitions, 43411 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:53,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:53,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:05:53,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:58,216 INFO L130 PetriNetUnfolder]: 1187/3733 cut-off events. [2022-11-21 09:05:58,216 INFO L131 PetriNetUnfolder]: For 155026/155026 co-relation queries the response was YES. [2022-11-21 09:05:58,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41327 conditions, 3733 events. 1187/3733 cut-off events. For 155026/155026 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 34251 event pairs, 79 based on Foata normal form. 1/3729 useless extension candidates. Maximal degree in co-relation 41144. Up to 1329 conditions per place. [2022-11-21 09:05:58,290 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 692 selfloop transitions, 887 changer transitions 11/1631 dead transitions. [2022-11-21 09:05:58,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 1631 transitions, 47784 flow [2022-11-21 09:05:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 09:05:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-21 09:05:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2691 transitions. [2022-11-21 09:05:58,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6385856668248695 [2022-11-21 09:05:58,295 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2691 transitions. [2022-11-21 09:05:58,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2691 transitions. [2022-11-21 09:05:58,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:58,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2691 transitions. [2022-11-21 09:05:58,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.91836734693877) internal successors, (2691), 49 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:58,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:58,308 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:58,308 INFO L175 Difference]: Start difference. First operand has 774 places, 1565 transitions, 43411 flow. Second operand 49 states and 2691 transitions. [2022-11-21 09:05:58,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 1631 transitions, 47784 flow [2022-11-21 09:06:00,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 1631 transitions, 47321 flow, removed 65 selfloop flow, removed 28 redundant places. [2022-11-21 09:06:00,145 INFO L231 Difference]: Finished difference. Result has 794 places, 1569 transitions, 44903 flow [2022-11-21 09:06:00,146 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=42988, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=44903, PETRI_PLACES=794, PETRI_TRANSITIONS=1569} [2022-11-21 09:06:00,147 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 718 predicate places. [2022-11-21 09:06:00,147 INFO L495 AbstractCegarLoop]: Abstraction has has 794 places, 1569 transitions, 44903 flow [2022-11-21 09:06:00,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:00,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:00,147 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, 1, 1, 1, 1] [2022-11-21 09:06:00,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:00,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:00,348 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash 117222831, now seen corresponding path program 18 times [2022-11-21 09:06:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:00,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713501033] [2022-11-21 09:06:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:00,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:00,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:00,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713501033] [2022-11-21 09:06:00,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713501033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:00,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316300393] [2022-11-21 09:06:00,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:06:00,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:00,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:00,410 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:00,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 09:06:00,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 09:06:00,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 09:06:00,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:00,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:00,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316300393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:00,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:00,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-11-21 09:06:00,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911083162] [2022-11-21 09:06:00,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:00,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 09:06:00,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:00,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 09:06:00,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:06:00,751 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2022-11-21 09:06:00,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 1569 transitions, 44903 flow. Second operand has 10 states, 10 states have (on average 69.7) internal successors, (697), 10 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:00,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:00,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2022-11-21 09:06:00,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:02,637 INFO L130 PetriNetUnfolder]: 1157/3574 cut-off events. [2022-11-21 09:06:02,637 INFO L131 PetriNetUnfolder]: For 151127/151287 co-relation queries the response was YES. [2022-11-21 09:06:02,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40001 conditions, 3574 events. 1157/3574 cut-off events. For 151127/151287 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32450 event pairs, 70 based on Foata normal form. 45/3599 useless extension candidates. Maximal degree in co-relation 39821. Up to 1089 conditions per place. [2022-11-21 09:06:02,690 INFO L137 encePairwiseOnDemand]: 80/86 looper letters, 428 selfloop transitions, 594 changer transitions 0/1596 dead transitions. [2022-11-21 09:06:02,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1596 transitions, 48162 flow [2022-11-21 09:06:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:06:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 09:06:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 499 transitions. [2022-11-21 09:06:02,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8289036544850499 [2022-11-21 09:06:02,691 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 499 transitions. [2022-11-21 09:06:02,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 499 transitions. [2022-11-21 09:06:02,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:02,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 499 transitions. [2022-11-21 09:06:02,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.28571428571429) internal successors, (499), 7 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:02,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:02,693 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:02,693 INFO L175 Difference]: Start difference. First operand has 794 places, 1569 transitions, 44903 flow. Second operand 7 states and 499 transitions. [2022-11-21 09:06:02,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 1596 transitions, 48162 flow [2022-11-21 09:06:04,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 731 places, 1596 transitions, 47405 flow, removed 25 selfloop flow, removed 36 redundant places. [2022-11-21 09:06:04,309 INFO L231 Difference]: Finished difference. Result has 734 places, 1576 transitions, 47087 flow [2022-11-21 09:06:04,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=43281, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=964, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=47087, PETRI_PLACES=734, PETRI_TRANSITIONS=1576} [2022-11-21 09:06:04,311 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 658 predicate places. [2022-11-21 09:06:04,311 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 1576 transitions, 47087 flow [2022-11-21 09:06:04,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.7) internal successors, (697), 10 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:04,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:04,311 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, 1, 1, 1, 1] [2022-11-21 09:06:04,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:04,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-21 09:06:04,512 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1899870451, now seen corresponding path program 19 times [2022-11-21 09:06:04,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:04,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236877000] [2022-11-21 09:06:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:04,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236877000] [2022-11-21 09:06:04,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236877000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306399752] [2022-11-21 09:06:04,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:06:04,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:04,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:04,875 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:04,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 09:06:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:04,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:05,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:06,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306399752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:06,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-21 09:06:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143008335] [2022-11-21 09:06:06,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:06,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 09:06:06,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 09:06:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-11-21 09:06:06,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:06:06,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 1576 transitions, 47087 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:06,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:06,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:06:06,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:11,291 INFO L130 PetriNetUnfolder]: 1507/4592 cut-off events. [2022-11-21 09:06:11,291 INFO L131 PetriNetUnfolder]: For 205415/205415 co-relation queries the response was YES. [2022-11-21 09:06:11,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54479 conditions, 4592 events. 1507/4592 cut-off events. For 205415/205415 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 43919 event pairs, 88 based on Foata normal form. 5/4587 useless extension candidates. Maximal degree in co-relation 54306. Up to 1849 conditions per place. [2022-11-21 09:06:11,378 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 828 selfloop transitions, 1172 changer transitions 35/2076 dead transitions. [2022-11-21 09:06:11,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 2076 transitions, 66516 flow [2022-11-21 09:06:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 09:06:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-21 09:06:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2703 transitions. [2022-11-21 09:06:11,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6414333175130518 [2022-11-21 09:06:11,381 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2703 transitions. [2022-11-21 09:06:11,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2703 transitions. [2022-11-21 09:06:11,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:11,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2703 transitions. [2022-11-21 09:06:11,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.16326530612245) internal successors, (2703), 49 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:11,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:11,391 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:11,391 INFO L175 Difference]: Start difference. First operand has 734 places, 1576 transitions, 47087 flow. Second operand 49 states and 2703 transitions. [2022-11-21 09:06:11,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 782 places, 2076 transitions, 66516 flow [2022-11-21 09:06:13,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 2076 transitions, 66490 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-21 09:06:13,911 INFO L231 Difference]: Finished difference. Result has 815 places, 1935 transitions, 64195 flow [2022-11-21 09:06:13,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=47067, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=837, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=64195, PETRI_PLACES=815, PETRI_TRANSITIONS=1935} [2022-11-21 09:06:13,912 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 739 predicate places. [2022-11-21 09:06:13,912 INFO L495 AbstractCegarLoop]: Abstraction has has 815 places, 1935 transitions, 64195 flow [2022-11-21 09:06:13,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:13,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:13,913 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, 1, 1, 1, 1] [2022-11-21 09:06:13,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:14,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:14,114 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1876532367, now seen corresponding path program 20 times [2022-11-21 09:06:14,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603845421] [2022-11-21 09:06:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:14,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:14,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603845421] [2022-11-21 09:06:14,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603845421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003478688] [2022-11-21 09:06:14,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:06:14,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:14,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:14,452 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:14,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 09:06:14,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:06:14,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:14,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:14,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:15,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:15,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003478688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:15,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:15,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-21 09:06:15,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392841181] [2022-11-21 09:06:15,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:15,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 09:06:15,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:15,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 09:06:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-11-21 09:06:15,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:06:15,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 815 places, 1935 transitions, 64195 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:15,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:15,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:06:15,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:23,218 INFO L130 PetriNetUnfolder]: 1724/5303 cut-off events. [2022-11-21 09:06:23,219 INFO L131 PetriNetUnfolder]: For 306089/306094 co-relation queries the response was YES. [2022-11-21 09:06:23,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68606 conditions, 5303 events. 1724/5303 cut-off events. For 306089/306094 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52414 event pairs, 80 based on Foata normal form. 6/5305 useless extension candidates. Maximal degree in co-relation 68398. Up to 1666 conditions per place. [2022-11-21 09:06:23,333 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 865 selfloop transitions, 1433 changer transitions 53/2392 dead transitions. [2022-11-21 09:06:23,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 2392 transitions, 83700 flow [2022-11-21 09:06:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-21 09:06:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-21 09:06:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3356 transitions. [2022-11-21 09:06:23,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6397255051467785 [2022-11-21 09:06:23,339 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3356 transitions. [2022-11-21 09:06:23,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3356 transitions. [2022-11-21 09:06:23,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:23,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3356 transitions. [2022-11-21 09:06:23,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 55.01639344262295) internal successors, (3356), 61 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:23,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:23,355 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:23,355 INFO L175 Difference]: Start difference. First operand has 815 places, 1935 transitions, 64195 flow. Second operand 61 states and 3356 transitions. [2022-11-21 09:06:23,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 865 places, 2392 transitions, 83700 flow [2022-11-21 09:06:27,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 2392 transitions, 83170 flow, removed 259 selfloop flow, removed 12 redundant places. [2022-11-21 09:06:27,365 INFO L231 Difference]: Finished difference. Result has 885 places, 2226 transitions, 80226 flow [2022-11-21 09:06:27,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=63807, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=80226, PETRI_PLACES=885, PETRI_TRANSITIONS=2226} [2022-11-21 09:06:27,367 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 809 predicate places. [2022-11-21 09:06:27,367 INFO L495 AbstractCegarLoop]: Abstraction has has 885 places, 2226 transitions, 80226 flow [2022-11-21 09:06:27,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:27,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:27,367 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, 1, 1, 1, 1] [2022-11-21 09:06:27,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:27,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-21 09:06:27,568 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash 836330979, now seen corresponding path program 21 times [2022-11-21 09:06:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:27,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632615582] [2022-11-21 09:06:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:27,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:27,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:27,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632615582] [2022-11-21 09:06:27,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632615582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:27,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865959336] [2022-11-21 09:06:27,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:06:27,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:27,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:27,896 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:27,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 09:06:27,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 09:06:27,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:27,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:28,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:28,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865959336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:28,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:28,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-21 09:06:28,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785054481] [2022-11-21 09:06:28,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:28,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 09:06:28,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:28,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 09:06:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-11-21 09:06:28,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:06:28,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 885 places, 2226 transitions, 80226 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:28,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:28,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:06:28,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:37,452 INFO L130 PetriNetUnfolder]: 1755/5392 cut-off events. [2022-11-21 09:06:37,452 INFO L131 PetriNetUnfolder]: For 363549/363561 co-relation queries the response was YES. [2022-11-21 09:06:37,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74805 conditions, 5392 events. 1755/5392 cut-off events. For 363549/363561 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 53240 event pairs, 104 based on Foata normal form. 10/5397 useless extension candidates. Maximal degree in co-relation 74575. Up to 1960 conditions per place. [2022-11-21 09:06:37,576 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 902 selfloop transitions, 1535 changer transitions 38/2516 dead transitions. [2022-11-21 09:06:37,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 2516 transitions, 94127 flow [2022-11-21 09:06:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-21 09:06:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-21 09:06:37,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3573 transitions. [2022-11-21 09:06:37,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6391771019677996 [2022-11-21 09:06:37,580 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3573 transitions. [2022-11-21 09:06:37,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3573 transitions. [2022-11-21 09:06:37,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:37,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3573 transitions. [2022-11-21 09:06:37,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.96923076923077) internal successors, (3573), 65 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:37,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:37,591 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:37,591 INFO L175 Difference]: Start difference. First operand has 885 places, 2226 transitions, 80226 flow. Second operand 65 states and 3573 transitions. [2022-11-21 09:06:37,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 939 places, 2516 transitions, 94127 flow [2022-11-21 09:06:42,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 926 places, 2516 transitions, 93625 flow, removed 238 selfloop flow, removed 13 redundant places. [2022-11-21 09:06:42,514 INFO L231 Difference]: Finished difference. Result has 949 places, 2370 transitions, 91477 flow [2022-11-21 09:06:42,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=79740, PETRI_DIFFERENCE_MINUEND_PLACES=862, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=91477, PETRI_PLACES=949, PETRI_TRANSITIONS=2370} [2022-11-21 09:06:42,516 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 873 predicate places. [2022-11-21 09:06:42,516 INFO L495 AbstractCegarLoop]: Abstraction has has 949 places, 2370 transitions, 91477 flow [2022-11-21 09:06:42,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:42,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:42,516 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, 1, 1, 1, 1] [2022-11-21 09:06:42,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:42,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 09:06:42,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash 65660761, now seen corresponding path program 22 times [2022-11-21 09:06:42,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:42,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293327293] [2022-11-21 09:06:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:42,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:43,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293327293] [2022-11-21 09:06:43,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293327293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415785042] [2022-11-21 09:06:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:06:43,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:43,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:43,064 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:43,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 09:06:43,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:06:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:43,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:43,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:44,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415785042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:44,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:44,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-21 09:06:44,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796641353] [2022-11-21 09:06:44,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:44,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 09:06:44,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 09:06:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-21 09:06:44,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:06:44,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 949 places, 2370 transitions, 91477 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:44,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:44,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:06:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:54,269 INFO L130 PetriNetUnfolder]: 1805/5560 cut-off events. [2022-11-21 09:06:54,269 INFO L131 PetriNetUnfolder]: For 429834/429846 co-relation queries the response was YES. [2022-11-21 09:06:54,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81289 conditions, 5560 events. 1805/5560 cut-off events. For 429834/429846 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 55268 event pairs, 95 based on Foata normal form. 9/5555 useless extension candidates. Maximal degree in co-relation 81045. Up to 2354 conditions per place. [2022-11-21 09:06:54,399 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 1078 selfloop transitions, 1512 changer transitions 22/2653 dead transitions. [2022-11-21 09:06:54,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1011 places, 2653 transitions, 105718 flow [2022-11-21 09:06:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-21 09:06:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-11-21 09:06:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4001 transitions. [2022-11-21 09:06:54,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6373048741637464 [2022-11-21 09:06:54,404 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4001 transitions. [2022-11-21 09:06:54,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4001 transitions. [2022-11-21 09:06:54,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:54,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4001 transitions. [2022-11-21 09:06:54,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 54.80821917808219) internal successors, (4001), 73 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:54,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:54,415 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:54,416 INFO L175 Difference]: Start difference. First operand has 949 places, 2370 transitions, 91477 flow. Second operand 73 states and 4001 transitions. [2022-11-21 09:06:54,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1011 places, 2653 transitions, 105718 flow [2022-11-21 09:07:00,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 2653 transitions, 104535 flow, removed 516 selfloop flow, removed 18 redundant places. [2022-11-21 09:07:00,172 INFO L231 Difference]: Finished difference. Result has 1023 places, 2545 transitions, 102533 flow [2022-11-21 09:07:00,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=90479, PETRI_DIFFERENCE_MINUEND_PLACES=921, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=102533, PETRI_PLACES=1023, PETRI_TRANSITIONS=2545} [2022-11-21 09:07:00,174 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 947 predicate places. [2022-11-21 09:07:00,174 INFO L495 AbstractCegarLoop]: Abstraction has has 1023 places, 2545 transitions, 102533 flow [2022-11-21 09:07:00,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:00,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:00,175 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, 1, 1, 1, 1] [2022-11-21 09:07:00,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-21 09:07:00,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:00,380 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1240584633, now seen corresponding path program 23 times [2022-11-21 09:07:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:00,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21414620] [2022-11-21 09:07:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:00,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:00,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21414620] [2022-11-21 09:07:00,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21414620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856701458] [2022-11-21 09:07:00,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:07:00,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:00,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:00,709 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:00,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-21 09:07:00,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:07:00,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:00,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:07:00,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:01,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:01,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856701458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:01,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:01,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-21 09:07:01,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138676632] [2022-11-21 09:07:01,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:01,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 09:07:01,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 09:07:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-11-21 09:07:01,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:07:01,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1023 places, 2545 transitions, 102533 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:01,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:01,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:07:01,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:11,796 INFO L130 PetriNetUnfolder]: 1803/5518 cut-off events. [2022-11-21 09:07:11,796 INFO L131 PetriNetUnfolder]: For 488755/488760 co-relation queries the response was YES. [2022-11-21 09:07:11,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84925 conditions, 5518 events. 1803/5518 cut-off events. For 488755/488760 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 54571 event pairs, 82 based on Foata normal form. 8/5511 useless extension candidates. Maximal degree in co-relation 84669. Up to 1815 conditions per place. [2022-11-21 09:07:11,919 INFO L137 encePairwiseOnDemand]: 70/86 looper letters, 956 selfloop transitions, 1657 changer transitions 38/2692 dead transitions. [2022-11-21 09:07:11,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1077 places, 2692 transitions, 112143 flow [2022-11-21 09:07:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-21 09:07:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-21 09:07:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3577 transitions. [2022-11-21 09:07:11,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6398926654740609 [2022-11-21 09:07:11,922 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3577 transitions. [2022-11-21 09:07:11,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3577 transitions. [2022-11-21 09:07:11,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:07:11,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3577 transitions. [2022-11-21 09:07:11,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 55.03076923076923) internal successors, (3577), 65 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:11,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:11,934 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:11,934 INFO L175 Difference]: Start difference. First operand has 1023 places, 2545 transitions, 102533 flow. Second operand 65 states and 3577 transitions. [2022-11-21 09:07:11,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1077 places, 2692 transitions, 112143 flow [2022-11-21 09:07:18,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1050 places, 2692 transitions, 110751 flow, removed 645 selfloop flow, removed 27 redundant places. [2022-11-21 09:07:18,828 INFO L231 Difference]: Finished difference. Result has 1063 places, 2534 transitions, 104590 flow [2022-11-21 09:07:18,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=101505, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=104590, PETRI_PLACES=1063, PETRI_TRANSITIONS=2534} [2022-11-21 09:07:18,830 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 987 predicate places. [2022-11-21 09:07:18,830 INFO L495 AbstractCegarLoop]: Abstraction has has 1063 places, 2534 transitions, 104590 flow [2022-11-21 09:07:18,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:18,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:18,831 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, 1, 1, 1, 1] [2022-11-21 09:07:18,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:19,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:19,036 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash -21380387, now seen corresponding path program 24 times [2022-11-21 09:07:19,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:19,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925670076] [2022-11-21 09:07:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:19,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:19,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925670076] [2022-11-21 09:07:19,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925670076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:19,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89986684] [2022-11-21 09:07:19,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:07:19,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:19,357 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:19,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-21 09:07:19,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 09:07:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:19,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:07:19,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:19,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:20,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89986684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:20,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:20,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-21 09:07:20,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94300117] [2022-11-21 09:07:20,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:20,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 09:07:20,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:20,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 09:07:20,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-11-21 09:07:20,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:07:20,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1063 places, 2534 transitions, 104590 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:20,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:20,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:07:20,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:28,734 INFO L130 PetriNetUnfolder]: 1813/5471 cut-off events. [2022-11-21 09:07:28,734 INFO L131 PetriNetUnfolder]: For 488017/488029 co-relation queries the response was YES. [2022-11-21 09:07:28,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86715 conditions, 5471 events. 1813/5471 cut-off events. For 488017/488029 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 53586 event pairs, 84 based on Foata normal form. 6/5463 useless extension candidates. Maximal degree in co-relation 86455. Up to 2616 conditions per place. [2022-11-21 09:07:28,850 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 1166 selfloop transitions, 1490 changer transitions 9/2706 dead transitions. [2022-11-21 09:07:28,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1088 places, 2706 transitions, 115105 flow [2022-11-21 09:07:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-21 09:07:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-21 09:07:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2096 transitions. [2022-11-21 09:07:28,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6413708690330477 [2022-11-21 09:07:28,852 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2096 transitions. [2022-11-21 09:07:28,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2096 transitions. [2022-11-21 09:07:28,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:07:28,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2096 transitions. [2022-11-21 09:07:28,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.1578947368421) internal successors, (2096), 38 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:28,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:28,857 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 86.0) internal successors, (3354), 39 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:28,857 INFO L175 Difference]: Start difference. First operand has 1063 places, 2534 transitions, 104590 flow. Second operand 38 states and 2096 transitions. [2022-11-21 09:07:28,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1088 places, 2706 transitions, 115105 flow [2022-11-21 09:07:35,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1035 places, 2706 transitions, 112320 flow, removed 105 selfloop flow, removed 53 redundant places. [2022-11-21 09:07:35,751 INFO L231 Difference]: Finished difference. Result has 1047 places, 2632 transitions, 108869 flow [2022-11-21 09:07:35,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=101941, PETRI_DIFFERENCE_MINUEND_PLACES=998, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=108869, PETRI_PLACES=1047, PETRI_TRANSITIONS=2632} [2022-11-21 09:07:35,754 INFO L288 CegarLoopForPetriNet]: 76 programPoint places, 971 predicate places. [2022-11-21 09:07:35,754 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 2632 transitions, 108869 flow [2022-11-21 09:07:35,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:35,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:35,755 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, 1, 1, 1, 1] [2022-11-21 09:07:35,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:35,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:35,961 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash -87113171, now seen corresponding path program 25 times [2022-11-21 09:07:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:35,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913899497] [2022-11-21 09:07:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:36,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913899497] [2022-11-21 09:07:36,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913899497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72176658] [2022-11-21 09:07:36,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:07:36,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:36,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:36,304 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:36,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67a85408-54fe-4ed6-8e9b-b6e74170544b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-21 09:07:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:36,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:07:36,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:36,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:37,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72176658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:37,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:37,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-21 09:07:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721966949] [2022-11-21 09:07:37,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:37,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 09:07:37,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 09:07:37,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-11-21 09:07:37,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-11-21 09:07:37,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 2632 transitions, 108869 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:37,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:37,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-11-21 09:07:37,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:47,751 INFO L130 PetriNetUnfolder]: 1894/5767 cut-off events. [2022-11-21 09:07:47,751 INFO L131 PetriNetUnfolder]: For 503551/503556 co-relation queries the response was YES. [2022-11-21 09:07:47,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92062 conditions, 5767 events. 1894/5767 cut-off events. For 503551/503556 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 57487 event pairs, 85 based on Foata normal form. 6/5759 useless extension candidates. Maximal degree in co-relation 91802. Up to 2735 conditions per place. [2022-11-21 09:07:47,872 INFO L137 encePairwiseOnDemand]: 71/86 looper letters, 1218 selfloop transitions, 1618 changer transitions 15/2892 dead transitions. [2022-11-21 09:07:47,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1095 places, 2892 transitions, 124477 flow [2022-11-21 09:07:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-21 09:07:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-21 09:07:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2847 transitions. [2022-11-21 09:07:47,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6366279069767442 [2022-11-21 09:07:47,875 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2847 transitions. [2022-11-21 09:07:47,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2847 transitions. [2022-11-21 09:07:47,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:07:47,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2847 transitions. [2022-11-21 09:07:47,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.75) internal successors, (2847), 52 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:47,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:47,880 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:47,880 INFO L175 Difference]: Start difference. First operand has 1047 places, 2632 transitions, 108869 flow. Second operand 52 states and 2847 transitions. [2022-11-21 09:07:47,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1095 places, 2892 transitions, 124477 flow