./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ --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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- 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-dbf71c6-m [2022-10-17 10:15:22,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:15:22,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:15:22,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:15:22,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:15:22,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:15:22,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:15:22,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:15:22,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:15:22,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:15:22,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:15:22,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:15:22,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:15:22,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:15:22,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:15:22,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:15:22,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:15:22,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:15:22,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:15:22,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:15:22,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:15:22,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:15:22,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:15:22,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:15:22,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:15:22,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:15:22,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:15:22,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:15:22,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:15:22,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:15:22,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:15:22,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:15:22,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:15:22,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:15:22,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:15:22,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:15:22,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:15:22,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:15:22,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:15:22,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:15:22,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:15:22,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:15:22,776 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:15:22,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:15:22,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:15:22,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:15:22,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:15:22,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:15:22,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:15:22,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:15:22,787 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:15:22,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:15:22,789 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:15:22,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:15:22,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:15:22,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:15:22,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:15:22,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:15:22,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:15:22,791 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:15:22,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:15:22,791 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:15:22,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:15:22,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:15:22,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:15:22,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:15:22,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:15:22,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:15:22,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:15:22,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:15:22,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:15:22,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:15:22,794 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:15:22,795 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:15:22,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:15:22,796 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_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-10-17 10:15:23,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:15:23,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:15:23,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:15:23,251 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:15:23,252 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:15:23,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-10-17 10:15:23,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/data/255c511a7/e4c05a5b697e4685bc7a636e402fb814/FLAG03af3e5c4 [2022-10-17 10:15:23,856 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:15:23,857 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-10-17 10:15:23,877 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/data/255c511a7/e4c05a5b697e4685bc7a636e402fb814/FLAG03af3e5c4 [2022-10-17 10:15:24,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/data/255c511a7/e4c05a5b697e4685bc7a636e402fb814 [2022-10-17 10:15:24,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:15:24,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:15:24,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:15:24,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:15:24,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:15:24,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4ab546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24, skipping insertion in model container [2022-10-17 10:15:24,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:15:24,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:15:24,561 WARN L230 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_f5632591-51a6-4e3a-a864-9dc3895dfdbd/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-10-17 10:15:24,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:15:24,574 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:15:24,609 WARN L230 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_f5632591-51a6-4e3a-a864-9dc3895dfdbd/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-10-17 10:15:24,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:15:24,636 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:15:24,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24 WrapperNode [2022-10-17 10:15:24,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:15:24,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:15:24,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:15:24,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:15:24,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,680 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-10-17 10:15:24,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:15:24,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:15:24,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:15:24,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:15:24,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,727 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:15:24,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:15:24,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:15:24,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:15:24,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (1/1) ... [2022-10-17 10:15:24,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:15:24,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:15:24,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:15:24,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:15:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:15:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 10:15:24,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 10:15:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 10:15:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 10:15:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:15:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:15:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:15:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 10:15:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 10:15:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:15:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:15:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:15:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:15:24,822 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:15:24,914 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:15:24,916 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:15:25,082 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:15:25,091 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:15:25,091 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:15:25,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:15:25 BoogieIcfgContainer [2022-10-17 10:15:25,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:15:25,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:15:25,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:15:25,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:15:25,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:15:24" (1/3) ... [2022-10-17 10:15:25,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d589885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:15:25, skipping insertion in model container [2022-10-17 10:15:25,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:15:24" (2/3) ... [2022-10-17 10:15:25,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d589885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:15:25, skipping insertion in model container [2022-10-17 10:15:25,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:15:25" (3/3) ... [2022-10-17 10:15:25,105 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-10-17 10:15:25,115 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:15:25,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:15:25,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:15:25,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:15:25,211 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:15:25,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-10-17 10:15:25,373 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-10-17 10:15:25,387 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:15:25,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-10-17 10:15:25,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-10-17 10:15:25,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-10-17 10:15:25,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:15:25,436 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;@74f76cc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:15:25,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:15:25,491 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-10-17 10:15:25,492 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:15:25,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:25,493 INFO L208 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] [2022-10-17 10:15:25,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2022-10-17 10:15:25,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:25,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858625801] [2022-10-17 10:15:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:25,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858625801] [2022-10-17 10:15:25,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858625801] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:25,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:25,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:15:26,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669803554] [2022-10-17 10:15:26,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:15:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:15:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:15:26,090 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2022-10-17 10:15:26,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:26,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:26,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2022-10-17 10:15:26,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:26,207 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-10-17 10:15:26,210 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-10-17 10:15:26,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-10-17 10:15:26,213 INFO L137 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-10-17 10:15:26,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2022-10-17 10:15:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:15:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:15:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2022-10-17 10:15:26,231 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-10-17 10:15:26,232 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2022-10-17 10:15:26,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2022-10-17 10:15:26,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:26,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2022-10-17 10:15:26,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:26,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:26,249 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:26,251 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2022-10-17 10:15:26,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2022-10-17 10:15:26,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 10:15:26,262 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-10-17 10:15:26,265 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-10-17 10:15:26,269 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-10-17 10:15:26,270 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-10-17 10:15:26,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:26,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:26,271 INFO L208 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] [2022-10-17 10:15:26,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:15:26,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2022-10-17 10:15:26,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:26,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216680425] [2022-10-17 10:15:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:26,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:27,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:27,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216680425] [2022-10-17 10:15:27,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216680425] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:27,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:27,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792197551] [2022-10-17 10:15:27,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:27,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:27,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:27,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:27,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:27,399 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:27,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:27,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:27,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:27,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:27,972 INFO L130 PetriNetUnfolder]: 106/357 cut-off events. [2022-10-17 10:15:27,973 INFO L131 PetriNetUnfolder]: For 22/28 co-relation queries the response was YES. [2022-10-17 10:15:27,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 357 events. 106/357 cut-off events. For 22/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1686 event pairs, 21 based on Foata normal form. 3/325 useless extension candidates. Maximal degree in co-relation 598. Up to 57 conditions per place. [2022-10-17 10:15:27,978 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2022-10-17 10:15:27,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2022-10-17 10:15:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-10-17 10:15:27,995 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-10-17 10:15:27,995 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-10-17 10:15:27,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-10-17 10:15:27,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:27,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-10-17 10:15:28,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,011 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,011 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2022-10-17 10:15:28,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2022-10-17 10:15:28,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:15:28,017 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2022-10-17 10:15:28,018 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2022-10-17 10:15:28,019 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-10-17 10:15:28,019 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2022-10-17 10:15:28,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:28,029 INFO L208 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] [2022-10-17 10:15:28,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:15:28,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1980240921, now seen corresponding path program 2 times [2022-10-17 10:15:28,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:28,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641436436] [2022-10-17 10:15:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:28,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:28,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:28,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641436436] [2022-10-17 10:15:28,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641436436] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:28,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:28,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:28,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284288113] [2022-10-17 10:15:28,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:28,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:28,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:28,502 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:28,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:28,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:28,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:28,969 INFO L130 PetriNetUnfolder]: 111/370 cut-off events. [2022-10-17 10:15:28,969 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-10-17 10:15:28,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 370 events. 111/370 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1727 event pairs, 31 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 812. Up to 98 conditions per place. [2022-10-17 10:15:28,975 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 54 selfloop transitions, 18 changer transitions 8/121 dead transitions. [2022-10-17 10:15:28,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 121 transitions, 526 flow [2022-10-17 10:15:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-10-17 10:15:28,979 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-10-17 10:15:28,980 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-10-17 10:15:28,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-10-17 10:15:28,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:28,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-10-17 10:15:28,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,988 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,989 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 792 transitions. [2022-10-17 10:15:28,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 121 transitions, 526 flow [2022-10-17 10:15:28,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 510 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-10-17 10:15:28,996 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 309 flow [2022-10-17 10:15:28,997 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=309, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2022-10-17 10:15:28,997 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 24 predicate places. [2022-10-17 10:15:28,998 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 309 flow [2022-10-17 10:15:28,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:28,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:28,999 INFO L208 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] [2022-10-17 10:15:28,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:15:28,999 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1386736289, now seen corresponding path program 3 times [2022-10-17 10:15:29,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:29,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588880147] [2022-10-17 10:15:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:29,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:29,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588880147] [2022-10-17 10:15:29,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588880147] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:29,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:29,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:29,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508605593] [2022-10-17 10:15:29,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:29,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:29,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:29,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:29,456 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:29,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 309 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:29,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:29,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:29,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:29,981 INFO L130 PetriNetUnfolder]: 139/385 cut-off events. [2022-10-17 10:15:29,981 INFO L131 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2022-10-17 10:15:29,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 385 events. 139/385 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1756 event pairs, 35 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1057. Up to 107 conditions per place. [2022-10-17 10:15:29,987 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 28 changer transitions 8/130 dead transitions. [2022-10-17 10:15:29,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 684 flow [2022-10-17 10:15:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-10-17 10:15:29,991 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-10-17 10:15:29,992 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-10-17 10:15:29,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-10-17 10:15:29,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:29,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-10-17 10:15:29,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:29,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:30,000 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:30,000 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 309 flow. Second operand 14 states and 794 transitions. [2022-10-17 10:15:30,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 684 flow [2022-10-17 10:15:30,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 614 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-10-17 10:15:30,009 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 427 flow [2022-10-17 10:15:30,009 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2022-10-17 10:15:30,010 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2022-10-17 10:15:30,011 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 427 flow [2022-10-17 10:15:30,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:30,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:30,012 INFO L208 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] [2022-10-17 10:15:30,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:15:30,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash -83195579, now seen corresponding path program 4 times [2022-10-17 10:15:30,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:30,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400797618] [2022-10-17 10:15:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:30,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:30,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:30,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400797618] [2022-10-17 10:15:30,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400797618] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:30,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:30,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:30,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627966003] [2022-10-17 10:15:30,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:30,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:30,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:30,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:30,433 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:30,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 427 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:30,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:30,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:30,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:30,882 INFO L130 PetriNetUnfolder]: 162/417 cut-off events. [2022-10-17 10:15:30,882 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-10-17 10:15:30,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 417 events. 162/417 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1882 event pairs, 47 based on Foata normal form. 1/406 useless extension candidates. Maximal degree in co-relation 1322. Up to 121 conditions per place. [2022-10-17 10:15:30,890 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 38 changer transitions 8/148 dead transitions. [2022-10-17 10:15:30,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 919 flow [2022-10-17 10:15:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-10-17 10:15:30,899 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-10-17 10:15:30,899 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-10-17 10:15:30,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-10-17 10:15:30,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:30,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-10-17 10:15:30,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:30,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:30,909 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:30,909 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 427 flow. Second operand 14 states and 790 transitions. [2022-10-17 10:15:30,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 919 flow [2022-10-17 10:15:30,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 842 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-10-17 10:15:30,921 INFO L231 Difference]: Finished difference. Result has 114 places, 114 transitions, 631 flow [2022-10-17 10:15:30,922 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=631, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2022-10-17 10:15:30,923 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 37 predicate places. [2022-10-17 10:15:30,923 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 631 flow [2022-10-17 10:15:30,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:30,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:30,924 INFO L208 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] [2022-10-17 10:15:30,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:15:30,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1878158297, now seen corresponding path program 5 times [2022-10-17 10:15:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:30,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944583856] [2022-10-17 10:15:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:31,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:31,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944583856] [2022-10-17 10:15:31,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944583856] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:31,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:31,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:31,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716977837] [2022-10-17 10:15:31,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:31,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:31,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:31,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:31,408 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:31,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 631 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:31,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:31,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:31,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:31,767 INFO L130 PetriNetUnfolder]: 166/441 cut-off events. [2022-10-17 10:15:31,768 INFO L131 PetriNetUnfolder]: For 878/878 co-relation queries the response was YES. [2022-10-17 10:15:31,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 441 events. 166/441 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2104 event pairs, 44 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 1515. Up to 120 conditions per place. [2022-10-17 10:15:31,775 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 38 changer transitions 8/155 dead transitions. [2022-10-17 10:15:31,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 155 transitions, 1061 flow [2022-10-17 10:15:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-10-17 10:15:31,779 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-10-17 10:15:31,779 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-10-17 10:15:31,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-10-17 10:15:31,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:31,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-10-17 10:15:31,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:31,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:31,787 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:31,787 INFO L175 Difference]: Start difference. First operand has 114 places, 114 transitions, 631 flow. Second operand 14 states and 796 transitions. [2022-10-17 10:15:31,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 155 transitions, 1061 flow [2022-10-17 10:15:31,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 155 transitions, 989 flow, removed 22 selfloop flow, removed 8 redundant places. [2022-10-17 10:15:31,799 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 679 flow [2022-10-17 10:15:31,800 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=679, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2022-10-17 10:15:31,800 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 43 predicate places. [2022-10-17 10:15:31,801 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 679 flow [2022-10-17 10:15:31,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:31,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:31,802 INFO L208 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] [2022-10-17 10:15:31,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:15:31,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash 211517427, now seen corresponding path program 6 times [2022-10-17 10:15:31,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:31,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708630521] [2022-10-17 10:15:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:31,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:32,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:32,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708630521] [2022-10-17 10:15:32,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708630521] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:32,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:32,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128766417] [2022-10-17 10:15:32,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:32,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:32,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:32,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:32,209 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:32,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 679 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:32,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:32,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:32,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:32,622 INFO L130 PetriNetUnfolder]: 184/501 cut-off events. [2022-10-17 10:15:32,622 INFO L131 PetriNetUnfolder]: For 1267/1269 co-relation queries the response was YES. [2022-10-17 10:15:32,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 501 events. 184/501 cut-off events. For 1267/1269 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2421 event pairs, 35 based on Foata normal form. 3/496 useless extension candidates. Maximal degree in co-relation 1726. Up to 143 conditions per place. [2022-10-17 10:15:32,631 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 43 changer transitions 7/154 dead transitions. [2022-10-17 10:15:32,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 154 transitions, 1142 flow [2022-10-17 10:15:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-10-17 10:15:32,636 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-10-17 10:15:32,636 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-10-17 10:15:32,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-10-17 10:15:32,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:32,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-10-17 10:15:32,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:32,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:32,645 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:32,645 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 679 flow. Second operand 14 states and 793 transitions. [2022-10-17 10:15:32,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 154 transitions, 1142 flow [2022-10-17 10:15:32,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1028 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:32,661 INFO L231 Difference]: Finished difference. Result has 124 places, 124 transitions, 821 flow [2022-10-17 10:15:32,661 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=821, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2022-10-17 10:15:32,662 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 47 predicate places. [2022-10-17 10:15:32,662 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 821 flow [2022-10-17 10:15:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:32,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:32,663 INFO L208 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] [2022-10-17 10:15:32,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:15:32,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1533574161, now seen corresponding path program 7 times [2022-10-17 10:15:32,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:32,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146079433] [2022-10-17 10:15:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:32,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:33,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:33,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146079433] [2022-10-17 10:15:33,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146079433] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:33,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:33,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:33,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320243334] [2022-10-17 10:15:33,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:33,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:33,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:33,057 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:33,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 821 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:33,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:33,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:33,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:33,455 INFO L130 PetriNetUnfolder]: 183/506 cut-off events. [2022-10-17 10:15:33,455 INFO L131 PetriNetUnfolder]: For 1565/1567 co-relation queries the response was YES. [2022-10-17 10:15:33,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 506 events. 183/506 cut-off events. For 1565/1567 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2499 event pairs, 37 based on Foata normal form. 3/504 useless extension candidates. Maximal degree in co-relation 1825. Up to 142 conditions per place. [2022-10-17 10:15:33,466 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 43 changer transitions 8/160 dead transitions. [2022-10-17 10:15:33,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 1256 flow [2022-10-17 10:15:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-10-17 10:15:33,471 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-10-17 10:15:33,472 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-10-17 10:15:33,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-10-17 10:15:33,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:33,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-10-17 10:15:33,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:33,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:33,485 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:33,485 INFO L175 Difference]: Start difference. First operand has 124 places, 124 transitions, 821 flow. Second operand 14 states and 790 transitions. [2022-10-17 10:15:33,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 1256 flow [2022-10-17 10:15:33,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1177 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-10-17 10:15:33,504 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 829 flow [2022-10-17 10:15:33,504 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=829, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2022-10-17 10:15:33,508 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 51 predicate places. [2022-10-17 10:15:33,509 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 829 flow [2022-10-17 10:15:33,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:33,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:33,510 INFO L208 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] [2022-10-17 10:15:33,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:15:33,511 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash -364553813, now seen corresponding path program 8 times [2022-10-17 10:15:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611092421] [2022-10-17 10:15:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:33,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:33,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611092421] [2022-10-17 10:15:33,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611092421] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:33,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:33,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:33,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969407214] [2022-10-17 10:15:33,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:33,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:33,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:33,965 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:33,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 829 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:33,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:33,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:33,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:34,510 INFO L130 PetriNetUnfolder]: 183/504 cut-off events. [2022-10-17 10:15:34,510 INFO L131 PetriNetUnfolder]: For 1784/1786 co-relation queries the response was YES. [2022-10-17 10:15:34,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 504 events. 183/504 cut-off events. For 1784/1786 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2476 event pairs, 34 based on Foata normal form. 3/499 useless extension candidates. Maximal degree in co-relation 1840. Up to 141 conditions per place. [2022-10-17 10:15:34,518 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 44 changer transitions 8/155 dead transitions. [2022-10-17 10:15:34,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 155 transitions, 1217 flow [2022-10-17 10:15:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-10-17 10:15:34,524 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-10-17 10:15:34,524 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-10-17 10:15:34,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-10-17 10:15:34,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:34,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-10-17 10:15:34,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:34,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:34,534 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:34,534 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 829 flow. Second operand 14 states and 795 transitions. [2022-10-17 10:15:34,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 155 transitions, 1217 flow [2022-10-17 10:15:34,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1117 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:34,550 INFO L231 Difference]: Finished difference. Result has 129 places, 124 transitions, 877 flow [2022-10-17 10:15:34,550 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=877, PETRI_PLACES=129, PETRI_TRANSITIONS=124} [2022-10-17 10:15:34,551 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 52 predicate places. [2022-10-17 10:15:34,552 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 124 transitions, 877 flow [2022-10-17 10:15:34,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:34,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:34,553 INFO L208 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] [2022-10-17 10:15:34,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:15:34,553 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1352752699, now seen corresponding path program 9 times [2022-10-17 10:15:34,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475992504] [2022-10-17 10:15:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:34,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:34,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475992504] [2022-10-17 10:15:34,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475992504] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:34,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:34,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:34,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099811387] [2022-10-17 10:15:34,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:34,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:34,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:34,942 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:34,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 124 transitions, 877 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:34,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:34,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:35,389 INFO L130 PetriNetUnfolder]: 177/457 cut-off events. [2022-10-17 10:15:35,389 INFO L131 PetriNetUnfolder]: For 1791/1793 co-relation queries the response was YES. [2022-10-17 10:15:35,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 457 events. 177/457 cut-off events. For 1791/1793 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2186 event pairs, 37 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 1791. Up to 132 conditions per place. [2022-10-17 10:15:35,397 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 42 changer transitions 8/153 dead transitions. [2022-10-17 10:15:35,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 1217 flow [2022-10-17 10:15:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-10-17 10:15:35,400 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-10-17 10:15:35,400 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-10-17 10:15:35,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-10-17 10:15:35,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:35,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-10-17 10:15:35,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:35,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:35,410 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:35,411 INFO L175 Difference]: Start difference. First operand has 129 places, 124 transitions, 877 flow. Second operand 14 states and 793 transitions. [2022-10-17 10:15:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 1217 flow [2022-10-17 10:15:35,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1127 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-10-17 10:15:35,425 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 858 flow [2022-10-17 10:15:35,426 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2022-10-17 10:15:35,428 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-10-17 10:15:35,428 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 858 flow [2022-10-17 10:15:35,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:35,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:35,429 INFO L208 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] [2022-10-17 10:15:35,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:15:35,430 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1962214603, now seen corresponding path program 10 times [2022-10-17 10:15:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:35,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962815081] [2022-10-17 10:15:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:35,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:35,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962815081] [2022-10-17 10:15:35,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962815081] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:35,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:35,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:35,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233163193] [2022-10-17 10:15:35,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:35,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:35,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:35,845 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:35,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:35,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:35,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:35,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:36,452 INFO L130 PetriNetUnfolder]: 186/518 cut-off events. [2022-10-17 10:15:36,452 INFO L131 PetriNetUnfolder]: For 1890/1894 co-relation queries the response was YES. [2022-10-17 10:15:36,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 518 events. 186/518 cut-off events. For 1890/1894 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2648 event pairs, 27 based on Foata normal form. 3/516 useless extension candidates. Maximal degree in co-relation 1891. Up to 139 conditions per place. [2022-10-17 10:15:36,463 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 65 selfloop transitions, 43 changer transitions 8/157 dead transitions. [2022-10-17 10:15:36,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 157 transitions, 1235 flow [2022-10-17 10:15:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 797 transitions. [2022-10-17 10:15:36,466 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6543513957307061 [2022-10-17 10:15:36,467 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 797 transitions. [2022-10-17 10:15:36,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 797 transitions. [2022-10-17 10:15:36,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:36,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 797 transitions. [2022-10-17 10:15:36,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.92857142857143) internal successors, (797), 14 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:36,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:36,475 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:36,475 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 858 flow. Second operand 14 states and 797 transitions. [2022-10-17 10:15:36,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 157 transitions, 1235 flow [2022-10-17 10:15:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 157 transitions, 1137 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:36,500 INFO L231 Difference]: Finished difference. Result has 132 places, 123 transitions, 872 flow [2022-10-17 10:15:36,501 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=872, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2022-10-17 10:15:36,502 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-10-17 10:15:36,502 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 872 flow [2022-10-17 10:15:36,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:36,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:36,504 INFO L208 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] [2022-10-17 10:15:36,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:15:36,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:36,505 INFO L85 PathProgramCache]: Analyzing trace with hash -318523859, now seen corresponding path program 11 times [2022-10-17 10:15:36,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:36,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844365787] [2022-10-17 10:15:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:36,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:36,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844365787] [2022-10-17 10:15:36,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844365787] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:36,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:36,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950698794] [2022-10-17 10:15:36,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:36,924 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:36,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 872 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:36,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:36,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:36,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:37,478 INFO L130 PetriNetUnfolder]: 184/531 cut-off events. [2022-10-17 10:15:37,478 INFO L131 PetriNetUnfolder]: For 2015/2017 co-relation queries the response was YES. [2022-10-17 10:15:37,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 531 events. 184/531 cut-off events. For 2015/2017 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2756 event pairs, 35 based on Foata normal form. 3/527 useless extension candidates. Maximal degree in co-relation 1915. Up to 147 conditions per place. [2022-10-17 10:15:37,488 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 43 changer transitions 7/157 dead transitions. [2022-10-17 10:15:37,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 157 transitions, 1242 flow [2022-10-17 10:15:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-10-17 10:15:37,492 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-10-17 10:15:37,492 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-10-17 10:15:37,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-10-17 10:15:37,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:37,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-10-17 10:15:37,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:37,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:37,508 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:37,508 INFO L175 Difference]: Start difference. First operand has 132 places, 123 transitions, 872 flow. Second operand 14 states and 795 transitions. [2022-10-17 10:15:37,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 157 transitions, 1242 flow [2022-10-17 10:15:37,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1140 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:37,529 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 886 flow [2022-10-17 10:15:37,529 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=886, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2022-10-17 10:15:37,531 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2022-10-17 10:15:37,531 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 886 flow [2022-10-17 10:15:37,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:37,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:37,532 INFO L208 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] [2022-10-17 10:15:37,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:15:37,533 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash 33584437, now seen corresponding path program 12 times [2022-10-17 10:15:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:37,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156338513] [2022-10-17 10:15:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:37,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156338513] [2022-10-17 10:15:37,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156338513] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:37,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:37,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:37,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306923444] [2022-10-17 10:15:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:37,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:37,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:37,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:37,946 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:37,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 886 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:37,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:37,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:37,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:38,473 INFO L130 PetriNetUnfolder]: 179/495 cut-off events. [2022-10-17 10:15:38,473 INFO L131 PetriNetUnfolder]: For 1983/1983 co-relation queries the response was YES. [2022-10-17 10:15:38,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1887 conditions, 495 events. 179/495 cut-off events. For 1983/1983 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2514 event pairs, 43 based on Foata normal form. 1/486 useless extension candidates. Maximal degree in co-relation 1857. Up to 143 conditions per place. [2022-10-17 10:15:38,483 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 40 changer transitions 8/153 dead transitions. [2022-10-17 10:15:38,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 153 transitions, 1228 flow [2022-10-17 10:15:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-10-17 10:15:38,487 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-10-17 10:15:38,487 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-10-17 10:15:38,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-10-17 10:15:38,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:38,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-10-17 10:15:38,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:38,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:38,495 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:38,495 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 886 flow. Second operand 14 states and 791 transitions. [2022-10-17 10:15:38,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 153 transitions, 1228 flow [2022-10-17 10:15:38,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1130 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:38,513 INFO L231 Difference]: Finished difference. Result has 134 places, 122 transitions, 847 flow [2022-10-17 10:15:38,514 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=847, PETRI_PLACES=134, PETRI_TRANSITIONS=122} [2022-10-17 10:15:38,515 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 57 predicate places. [2022-10-17 10:15:38,515 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 122 transitions, 847 flow [2022-10-17 10:15:38,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:38,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:38,517 INFO L208 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] [2022-10-17 10:15:38,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:15:38,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:38,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1539772675, now seen corresponding path program 13 times [2022-10-17 10:15:38,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:38,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69244242] [2022-10-17 10:15:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:38,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:38,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:38,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69244242] [2022-10-17 10:15:38,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69244242] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:38,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:38,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:38,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992720202] [2022-10-17 10:15:38,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:38,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:38,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:38,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:38,897 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:38,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 122 transitions, 847 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:38,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:38,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:38,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:39,333 INFO L130 PetriNetUnfolder]: 178/481 cut-off events. [2022-10-17 10:15:39,333 INFO L131 PetriNetUnfolder]: For 1912/1914 co-relation queries the response was YES. [2022-10-17 10:15:39,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1857 conditions, 481 events. 178/481 cut-off events. For 1912/1914 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2393 event pairs, 45 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1828. Up to 142 conditions per place. [2022-10-17 10:15:39,342 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 7/153 dead transitions. [2022-10-17 10:15:39,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 153 transitions, 1228 flow [2022-10-17 10:15:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-10-17 10:15:39,345 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-10-17 10:15:39,346 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-10-17 10:15:39,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-10-17 10:15:39,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:39,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-10-17 10:15:39,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:39,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:39,354 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:39,354 INFO L175 Difference]: Start difference. First operand has 134 places, 122 transitions, 847 flow. Second operand 14 states and 792 transitions. [2022-10-17 10:15:39,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 153 transitions, 1228 flow [2022-10-17 10:15:39,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 153 transitions, 1130 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-10-17 10:15:39,372 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 893 flow [2022-10-17 10:15:39,373 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2022-10-17 10:15:39,374 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-10-17 10:15:39,374 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 893 flow [2022-10-17 10:15:39,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:39,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:39,375 INFO L208 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] [2022-10-17 10:15:39,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:15:39,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1154053461, now seen corresponding path program 14 times [2022-10-17 10:15:39,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:39,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390863979] [2022-10-17 10:15:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:39,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:39,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:39,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390863979] [2022-10-17 10:15:39,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390863979] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:39,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:39,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677643796] [2022-10-17 10:15:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:39,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:39,741 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:39,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 893 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:39,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:39,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:39,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:40,240 INFO L130 PetriNetUnfolder]: 184/547 cut-off events. [2022-10-17 10:15:40,240 INFO L131 PetriNetUnfolder]: For 2021/2025 co-relation queries the response was YES. [2022-10-17 10:15:40,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 547 events. 184/547 cut-off events. For 2021/2025 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2963 event pairs, 41 based on Foata normal form. 3/542 useless extension candidates. Maximal degree in co-relation 1980. Up to 132 conditions per place. [2022-10-17 10:15:40,251 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2022-10-17 10:15:40,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1328 flow [2022-10-17 10:15:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-10-17 10:15:40,257 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-10-17 10:15:40,257 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-10-17 10:15:40,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-10-17 10:15:40,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:40,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-10-17 10:15:40,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:40,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:40,266 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:40,267 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 893 flow. Second operand 14 states and 793 transitions. [2022-10-17 10:15:40,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1328 flow [2022-10-17 10:15:40,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1247 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-10-17 10:15:40,286 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 941 flow [2022-10-17 10:15:40,287 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=941, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2022-10-17 10:15:40,287 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2022-10-17 10:15:40,288 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 941 flow [2022-10-17 10:15:40,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:40,289 INFO L208 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] [2022-10-17 10:15:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 10:15:40,291 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:40,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:40,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1555045935, now seen corresponding path program 15 times [2022-10-17 10:15:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:40,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838320213] [2022-10-17 10:15:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:40,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:40,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:40,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838320213] [2022-10-17 10:15:40,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838320213] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:40,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:40,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923271159] [2022-10-17 10:15:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:40,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:40,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:40,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:40,651 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:40,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 941 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:40,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:40,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:40,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:41,090 INFO L130 PetriNetUnfolder]: 183/546 cut-off events. [2022-10-17 10:15:41,091 INFO L131 PetriNetUnfolder]: For 2136/2140 co-relation queries the response was YES. [2022-10-17 10:15:41,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 546 events. 183/546 cut-off events. For 2136/2140 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2954 event pairs, 41 based on Foata normal form. 3/541 useless extension candidates. Maximal degree in co-relation 2004. Up to 161 conditions per place. [2022-10-17 10:15:41,101 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 38 changer transitions 8/157 dead transitions. [2022-10-17 10:15:41,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 157 transitions, 1329 flow [2022-10-17 10:15:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-10-17 10:15:41,105 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-10-17 10:15:41,105 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-10-17 10:15:41,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-10-17 10:15:41,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:41,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-10-17 10:15:41,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,114 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,124 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 941 flow. Second operand 14 states and 788 transitions. [2022-10-17 10:15:41,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 157 transitions, 1329 flow [2022-10-17 10:15:41,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 157 transitions, 1239 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-10-17 10:15:41,145 INFO L231 Difference]: Finished difference. Result has 143 places, 125 transitions, 915 flow [2022-10-17 10:15:41,146 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=915, PETRI_PLACES=143, PETRI_TRANSITIONS=125} [2022-10-17 10:15:41,146 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-10-17 10:15:41,149 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 125 transitions, 915 flow [2022-10-17 10:15:41,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:41,160 INFO L208 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] [2022-10-17 10:15:41,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 10:15:41,161 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:41,162 INFO L85 PathProgramCache]: Analyzing trace with hash -125718487, now seen corresponding path program 16 times [2022-10-17 10:15:41,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:41,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254019405] [2022-10-17 10:15:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:41,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:41,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:41,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254019405] [2022-10-17 10:15:41,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254019405] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:41,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:41,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:41,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245825454] [2022-10-17 10:15:41,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:41,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:41,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:41,518 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:41,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 125 transitions, 915 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:41,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:41,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:41,933 INFO L130 PetriNetUnfolder]: 179/514 cut-off events. [2022-10-17 10:15:41,933 INFO L131 PetriNetUnfolder]: For 2071/2073 co-relation queries the response was YES. [2022-10-17 10:15:41,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 514 events. 179/514 cut-off events. For 2071/2073 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2736 event pairs, 51 based on Foata normal form. 1/503 useless extension candidates. Maximal degree in co-relation 1953. Up to 151 conditions per place. [2022-10-17 10:15:41,943 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 39 changer transitions 7/159 dead transitions. [2022-10-17 10:15:41,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 159 transitions, 1328 flow [2022-10-17 10:15:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-10-17 10:15:41,946 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-10-17 10:15:41,947 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-10-17 10:15:41,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-10-17 10:15:41,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:41,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-10-17 10:15:41,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,954 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,954 INFO L175 Difference]: Start difference. First operand has 143 places, 125 transitions, 915 flow. Second operand 14 states and 790 transitions. [2022-10-17 10:15:41,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 159 transitions, 1328 flow [2022-10-17 10:15:41,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 1238 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:41,974 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 931 flow [2022-10-17 10:15:41,975 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=931, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2022-10-17 10:15:41,976 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 66 predicate places. [2022-10-17 10:15:41,976 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 931 flow [2022-10-17 10:15:41,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:41,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:41,977 INFO L208 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] [2022-10-17 10:15:41,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-17 10:15:41,977 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash -100489433, now seen corresponding path program 17 times [2022-10-17 10:15:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:41,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186026792] [2022-10-17 10:15:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:42,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:42,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186026792] [2022-10-17 10:15:42,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186026792] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:42,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:42,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:42,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370740247] [2022-10-17 10:15:42,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:42,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:42,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:42,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:42,372 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:42,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 931 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:42,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:42,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:42,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:42,891 INFO L130 PetriNetUnfolder]: 186/566 cut-off events. [2022-10-17 10:15:42,891 INFO L131 PetriNetUnfolder]: For 2240/2244 co-relation queries the response was YES. [2022-10-17 10:15:42,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 566 events. 186/566 cut-off events. For 2240/2244 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3184 event pairs, 39 based on Foata normal form. 3/561 useless extension candidates. Maximal degree in co-relation 2071. Up to 158 conditions per place. [2022-10-17 10:15:42,899 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 41 changer transitions 8/161 dead transitions. [2022-10-17 10:15:42,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 161 transitions, 1340 flow [2022-10-17 10:15:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-10-17 10:15:42,904 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-10-17 10:15:42,904 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-10-17 10:15:42,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-10-17 10:15:42,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:42,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-10-17 10:15:42,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:42,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:42,910 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:42,910 INFO L175 Difference]: Start difference. First operand has 143 places, 126 transitions, 931 flow. Second operand 14 states and 796 transitions. [2022-10-17 10:15:42,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 161 transitions, 1340 flow [2022-10-17 10:15:42,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 161 transitions, 1246 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:42,925 INFO L231 Difference]: Finished difference. Result has 145 places, 128 transitions, 957 flow [2022-10-17 10:15:42,926 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=957, PETRI_PLACES=145, PETRI_TRANSITIONS=128} [2022-10-17 10:15:42,926 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-10-17 10:15:42,926 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 128 transitions, 957 flow [2022-10-17 10:15:42,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:42,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:42,927 INFO L208 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] [2022-10-17 10:15:42,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-17 10:15:42,928 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:42,928 INFO L85 PathProgramCache]: Analyzing trace with hash 35132145, now seen corresponding path program 18 times [2022-10-17 10:15:42,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:42,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716044900] [2022-10-17 10:15:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:42,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716044900] [2022-10-17 10:15:43,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716044900] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:43,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:43,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396890266] [2022-10-17 10:15:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:43,263 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:43,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 128 transitions, 957 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:43,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:43,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:43,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:43,847 INFO L130 PetriNetUnfolder]: 182/534 cut-off events. [2022-10-17 10:15:43,847 INFO L131 PetriNetUnfolder]: For 2349/2351 co-relation queries the response was YES. [2022-10-17 10:15:43,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 534 events. 182/534 cut-off events. For 2349/2351 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2962 event pairs, 48 based on Foata normal form. 1/524 useless extension candidates. Maximal degree in co-relation 2043. Up to 166 conditions per place. [2022-10-17 10:15:43,857 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 38 changer transitions 9/157 dead transitions. [2022-10-17 10:15:43,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 157 transitions, 1329 flow [2022-10-17 10:15:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-10-17 10:15:43,860 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-10-17 10:15:43,861 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-10-17 10:15:43,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-10-17 10:15:43,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:43,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-10-17 10:15:43,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:43,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:43,867 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:43,868 INFO L175 Difference]: Start difference. First operand has 145 places, 128 transitions, 957 flow. Second operand 14 states and 791 transitions. [2022-10-17 10:15:43,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 157 transitions, 1329 flow [2022-10-17 10:15:43,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 157 transitions, 1231 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:43,890 INFO L231 Difference]: Finished difference. Result has 146 places, 126 transitions, 920 flow [2022-10-17 10:15:43,890 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=920, PETRI_PLACES=146, PETRI_TRANSITIONS=126} [2022-10-17 10:15:43,891 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-10-17 10:15:43,891 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 126 transitions, 920 flow [2022-10-17 10:15:43,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:43,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:43,892 INFO L208 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] [2022-10-17 10:15:43,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-17 10:15:43,893 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:43,893 INFO L85 PathProgramCache]: Analyzing trace with hash -228457297, now seen corresponding path program 19 times [2022-10-17 10:15:43,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:43,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062914588] [2022-10-17 10:15:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:43,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:44,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:44,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062914588] [2022-10-17 10:15:44,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062914588] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:44,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:44,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360961499] [2022-10-17 10:15:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:44,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:44,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:44,247 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:44,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 126 transitions, 920 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:44,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:44,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:44,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:44,818 INFO L130 PetriNetUnfolder]: 182/564 cut-off events. [2022-10-17 10:15:44,818 INFO L131 PetriNetUnfolder]: For 2330/2334 co-relation queries the response was YES. [2022-10-17 10:15:44,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2100 conditions, 564 events. 182/564 cut-off events. For 2330/2334 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3187 event pairs, 38 based on Foata normal form. 3/558 useless extension candidates. Maximal degree in co-relation 2064. Up to 166 conditions per place. [2022-10-17 10:15:44,829 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 72 selfloop transitions, 38 changer transitions 7/158 dead transitions. [2022-10-17 10:15:44,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 158 transitions, 1313 flow [2022-10-17 10:15:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-10-17 10:15:44,838 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-10-17 10:15:44,838 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-10-17 10:15:44,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-10-17 10:15:44,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:44,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-10-17 10:15:44,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:44,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:44,851 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:44,851 INFO L175 Difference]: Start difference. First operand has 146 places, 126 transitions, 920 flow. Second operand 14 states and 795 transitions. [2022-10-17 10:15:44,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 158 transitions, 1313 flow [2022-10-17 10:15:44,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 1225 flow, removed 6 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:44,897 INFO L231 Difference]: Finished difference. Result has 146 places, 127 transitions, 936 flow [2022-10-17 10:15:44,898 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=936, PETRI_PLACES=146, PETRI_TRANSITIONS=127} [2022-10-17 10:15:44,899 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-10-17 10:15:44,899 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 127 transitions, 936 flow [2022-10-17 10:15:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:44,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:44,900 INFO L208 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] [2022-10-17 10:15:44,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-10-17 10:15:44,900 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:44,901 INFO L85 PathProgramCache]: Analyzing trace with hash 134112017, now seen corresponding path program 20 times [2022-10-17 10:15:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:44,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146023063] [2022-10-17 10:15:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:44,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:45,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146023063] [2022-10-17 10:15:45,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146023063] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:45,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:45,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-10-17 10:15:45,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98943807] [2022-10-17 10:15:45,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:45,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:15:45,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:45,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:15:45,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:15:45,215 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-10-17 10:15:45,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 127 transitions, 936 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:45,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:45,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-10-17 10:15:45,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:45,768 INFO L130 PetriNetUnfolder]: 181/562 cut-off events. [2022-10-17 10:15:45,768 INFO L131 PetriNetUnfolder]: For 2413/2417 co-relation queries the response was YES. [2022-10-17 10:15:45,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 562 events. 181/562 cut-off events. For 2413/2417 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3152 event pairs, 37 based on Foata normal form. 3/557 useless extension candidates. Maximal degree in co-relation 2069. Up to 167 conditions per place. [2022-10-17 10:15:45,777 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 69 selfloop transitions, 36 changer transitions 9/155 dead transitions. [2022-10-17 10:15:45,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 155 transitions, 1300 flow [2022-10-17 10:15:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:15:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:15:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-10-17 10:15:45,783 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-10-17 10:15:45,783 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-10-17 10:15:45,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-10-17 10:15:45,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:45,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-10-17 10:15:45,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:45,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:45,794 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:45,794 INFO L175 Difference]: Start difference. First operand has 146 places, 127 transitions, 936 flow. Second operand 14 states and 792 transitions. [2022-10-17 10:15:45,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 155 transitions, 1300 flow [2022-10-17 10:15:45,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 155 transitions, 1206 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-10-17 10:15:45,811 INFO L231 Difference]: Finished difference. Result has 146 places, 124 transitions, 889 flow [2022-10-17 10:15:45,811 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=889, PETRI_PLACES=146, PETRI_TRANSITIONS=124} [2022-10-17 10:15:45,812 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 69 predicate places. [2022-10-17 10:15:45,812 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 124 transitions, 889 flow [2022-10-17 10:15:45,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:45,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:45,813 INFO L208 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] [2022-10-17 10:15:45,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-10-17 10:15:45,814 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash -404474333, now seen corresponding path program 1 times [2022-10-17 10:15:45,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:45,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250384940] [2022-10-17 10:15:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:45,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250384940] [2022-10-17 10:15:45,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250384940] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123877584] [2022-10-17 10:15:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:45,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:15:45,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:15:45,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:15:45,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:15:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:45,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:15:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:15:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:46,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:15:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:46,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123877584] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:46,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:15:46,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-10-17 10:15:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631491725] [2022-10-17 10:15:46,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:46,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:46,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:46,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:15:46,094 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:46,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 124 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:46,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:46,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:46,304 INFO L130 PetriNetUnfolder]: 187/539 cut-off events. [2022-10-17 10:15:46,305 INFO L131 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2022-10-17 10:15:46,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2095 conditions, 539 events. 187/539 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2865 event pairs, 22 based on Foata normal form. 8/539 useless extension candidates. Maximal degree in co-relation 2059. Up to 139 conditions per place. [2022-10-17 10:15:46,313 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-10-17 10:15:46,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 176 transitions, 1666 flow [2022-10-17 10:15:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:15:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:15:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-10-17 10:15:46,318 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-10-17 10:15:46,318 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-10-17 10:15:46,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-10-17 10:15:46,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:46,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-10-17 10:15:46,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,321 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,321 INFO L175 Difference]: Start difference. First operand has 146 places, 124 transitions, 889 flow. Second operand 7 states and 483 transitions. [2022-10-17 10:15:46,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 176 transitions, 1666 flow [2022-10-17 10:15:46,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1544 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-10-17 10:15:46,338 INFO L231 Difference]: Finished difference. Result has 137 places, 139 transitions, 1053 flow [2022-10-17 10:15:46,338 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2022-10-17 10:15:46,339 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-10-17 10:15:46,339 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1053 flow [2022-10-17 10:15:46,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:46,340 INFO L208 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] [2022-10-17 10:15:46,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:15:46,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:15:46,559 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash 915068349, now seen corresponding path program 2 times [2022-10-17 10:15:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:46,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832170565] [2022-10-17 10:15:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:46,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:46,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:46,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832170565] [2022-10-17 10:15:46,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832170565] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:46,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:46,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:15:46,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232940853] [2022-10-17 10:15:46,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:46,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:46,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:46,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:15:46,625 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:46,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1053 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:46,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:46,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:46,871 INFO L130 PetriNetUnfolder]: 219/661 cut-off events. [2022-10-17 10:15:46,871 INFO L131 PetriNetUnfolder]: For 3400/3403 co-relation queries the response was YES. [2022-10-17 10:15:46,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 661 events. 219/661 cut-off events. For 3400/3403 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3891 event pairs, 51 based on Foata normal form. 3/656 useless extension candidates. Maximal degree in co-relation 2539. Up to 144 conditions per place. [2022-10-17 10:15:46,883 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-10-17 10:15:46,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1840 flow [2022-10-17 10:15:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:15:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:15:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-10-17 10:15:46,885 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-10-17 10:15:46,886 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-10-17 10:15:46,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-10-17 10:15:46,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:46,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-10-17 10:15:46,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,889 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,889 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 1053 flow. Second operand 8 states and 561 transitions. [2022-10-17 10:15:46,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1840 flow [2022-10-17 10:15:46,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1780 flow, removed 25 selfloop flow, removed 1 redundant places. [2022-10-17 10:15:46,914 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1403 flow [2022-10-17 10:15:46,914 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1403, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2022-10-17 10:15:46,915 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-10-17 10:15:46,916 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1403 flow [2022-10-17 10:15:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:46,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:46,916 INFO L208 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] [2022-10-17 10:15:46,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-10-17 10:15:46,918 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:46,919 INFO L85 PathProgramCache]: Analyzing trace with hash -489830307, now seen corresponding path program 1 times [2022-10-17 10:15:46,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:46,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076918622] [2022-10-17 10:15:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:46,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:46,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:46,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076918622] [2022-10-17 10:15:46,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076918622] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040487883] [2022-10-17 10:15:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:46,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:15:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:15:46,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:15:46,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:15:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:15:47,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:15:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:47,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:15:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:47,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040487883] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:47,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:15:47,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-10-17 10:15:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574467891] [2022-10-17 10:15:47,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:47,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:15:47,161 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:47,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1403 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:47,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:47,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:47,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:47,411 INFO L130 PetriNetUnfolder]: 246/777 cut-off events. [2022-10-17 10:15:47,411 INFO L131 PetriNetUnfolder]: For 4968/4974 co-relation queries the response was YES. [2022-10-17 10:15:47,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 777 events. 246/777 cut-off events. For 4968/4974 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4912 event pairs, 53 based on Foata normal form. 9/779 useless extension candidates. Maximal degree in co-relation 3149. Up to 217 conditions per place. [2022-10-17 10:15:47,423 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 132 selfloop transitions, 40 changer transitions 2/223 dead transitions. [2022-10-17 10:15:47,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 223 transitions, 2367 flow [2022-10-17 10:15:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:15:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:15:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-10-17 10:15:47,425 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-10-17 10:15:47,425 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-10-17 10:15:47,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-10-17 10:15:47,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:47,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-10-17 10:15:47,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:47,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:47,428 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:47,428 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1403 flow. Second operand 6 states and 429 transitions. [2022-10-17 10:15:47,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 223 transitions, 2367 flow [2022-10-17 10:15:47,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 223 transitions, 2324 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-10-17 10:15:47,465 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1711 flow [2022-10-17 10:15:47,465 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1711, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2022-10-17 10:15:47,466 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 79 predicate places. [2022-10-17 10:15:47,466 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1711 flow [2022-10-17 10:15:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:47,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:47,467 INFO L208 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] [2022-10-17 10:15:47,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:15:47,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:15:47,695 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash 614691113, now seen corresponding path program 2 times [2022-10-17 10:15:47,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592284801] [2022-10-17 10:15:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:47,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:47,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592284801] [2022-10-17 10:15:47,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592284801] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:47,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:47,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:15:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550368242] [2022-10-17 10:15:47,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:15:47,748 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:47,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1711 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:47,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:47,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:47,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:48,050 INFO L130 PetriNetUnfolder]: 276/859 cut-off events. [2022-10-17 10:15:48,050 INFO L131 PetriNetUnfolder]: For 6863/6863 co-relation queries the response was YES. [2022-10-17 10:15:48,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 859 events. 276/859 cut-off events. For 6863/6863 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5408 event pairs, 38 based on Foata normal form. 11/864 useless extension candidates. Maximal degree in co-relation 3735. Up to 153 conditions per place. [2022-10-17 10:15:48,064 INFO L137 encePairwiseOnDemand]: 77/87 looper letters, 109 selfloop transitions, 98 changer transitions 2/258 dead transitions. [2022-10-17 10:15:48,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 258 transitions, 3139 flow [2022-10-17 10:15:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:15:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-10-17 10:15:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 617 transitions. [2022-10-17 10:15:48,066 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7879948914431673 [2022-10-17 10:15:48,066 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 617 transitions. [2022-10-17 10:15:48,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 617 transitions. [2022-10-17 10:15:48,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:48,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 617 transitions. [2022-10-17 10:15:48,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 68.55555555555556) internal successors, (617), 9 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,071 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,071 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1711 flow. Second operand 9 states and 617 transitions. [2022-10-17 10:15:48,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 258 transitions, 3139 flow [2022-10-17 10:15:48,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 258 transitions, 3095 flow, removed 13 selfloop flow, removed 1 redundant places. [2022-10-17 10:15:48,116 INFO L231 Difference]: Finished difference. Result has 168 places, 216 transitions, 2693 flow [2022-10-17 10:15:48,117 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2693, PETRI_PLACES=168, PETRI_TRANSITIONS=216} [2022-10-17 10:15:48,118 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 91 predicate places. [2022-10-17 10:15:48,118 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 216 transitions, 2693 flow [2022-10-17 10:15:48,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:48,119 INFO L208 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] [2022-10-17 10:15:48,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-10-17 10:15:48,119 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2090104067, now seen corresponding path program 3 times [2022-10-17 10:15:48,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:48,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086132008] [2022-10-17 10:15:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:48,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086132008] [2022-10-17 10:15:48,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086132008] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:48,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:48,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:15:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258760739] [2022-10-17 10:15:48,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:48,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:48,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:15:48,171 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:48,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 216 transitions, 2693 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:48,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:48,474 INFO L130 PetriNetUnfolder]: 265/856 cut-off events. [2022-10-17 10:15:48,475 INFO L131 PetriNetUnfolder]: For 8498/8507 co-relation queries the response was YES. [2022-10-17 10:15:48,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4021 conditions, 856 events. 265/856 cut-off events. For 8498/8507 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5464 event pairs, 67 based on Foata normal form. 7/853 useless extension candidates. Maximal degree in co-relation 3973. Up to 197 conditions per place. [2022-10-17 10:15:48,500 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 145 selfloop transitions, 48 changer transitions 5/247 dead transitions. [2022-10-17 10:15:48,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 247 transitions, 3378 flow [2022-10-17 10:15:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:15:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:15:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-10-17 10:15:48,502 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-10-17 10:15:48,502 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-10-17 10:15:48,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-10-17 10:15:48,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:48,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-10-17 10:15:48,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,506 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,506 INFO L175 Difference]: Start difference. First operand has 168 places, 216 transitions, 2693 flow. Second operand 7 states and 486 transitions. [2022-10-17 10:15:48,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 247 transitions, 3378 flow [2022-10-17 10:15:48,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 247 transitions, 3268 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-10-17 10:15:48,567 INFO L231 Difference]: Finished difference. Result has 175 places, 214 transitions, 2664 flow [2022-10-17 10:15:48,568 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2664, PETRI_PLACES=175, PETRI_TRANSITIONS=214} [2022-10-17 10:15:48,568 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 98 predicate places. [2022-10-17 10:15:48,569 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 214 transitions, 2664 flow [2022-10-17 10:15:48,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:48,569 INFO L208 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] [2022-10-17 10:15:48,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-10-17 10:15:48,570 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -438376403, now seen corresponding path program 4 times [2022-10-17 10:15:48,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:48,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68206614] [2022-10-17 10:15:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:48,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:48,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68206614] [2022-10-17 10:15:48,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68206614] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:48,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:48,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:15:48,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042000537] [2022-10-17 10:15:48,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:48,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:48,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:48,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:15:48,621 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:48,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 214 transitions, 2664 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:48,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:48,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:48,963 INFO L130 PetriNetUnfolder]: 255/820 cut-off events. [2022-10-17 10:15:48,963 INFO L131 PetriNetUnfolder]: For 8419/8425 co-relation queries the response was YES. [2022-10-17 10:15:48,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 820 events. 255/820 cut-off events. For 8419/8425 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5055 event pairs, 62 based on Foata normal form. 3/815 useless extension candidates. Maximal degree in co-relation 3831. Up to 197 conditions per place. [2022-10-17 10:15:48,976 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 135 selfloop transitions, 68 changer transitions 3/255 dead transitions. [2022-10-17 10:15:48,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 255 transitions, 3476 flow [2022-10-17 10:15:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:15:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:15:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 555 transitions. [2022-10-17 10:15:48,979 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7974137931034483 [2022-10-17 10:15:48,979 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 555 transitions. [2022-10-17 10:15:48,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 555 transitions. [2022-10-17 10:15:48,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:48,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 555 transitions. [2022-10-17 10:15:48,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,983 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:48,983 INFO L175 Difference]: Start difference. First operand has 175 places, 214 transitions, 2664 flow. Second operand 8 states and 555 transitions. [2022-10-17 10:15:48,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 255 transitions, 3476 flow [2022-10-17 10:15:49,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 255 transitions, 3397 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-10-17 10:15:49,041 INFO L231 Difference]: Finished difference. Result has 176 places, 221 transitions, 2959 flow [2022-10-17 10:15:49,042 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2959, PETRI_PLACES=176, PETRI_TRANSITIONS=221} [2022-10-17 10:15:49,042 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 99 predicate places. [2022-10-17 10:15:49,042 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 221 transitions, 2959 flow [2022-10-17 10:15:49,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:49,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:49,043 INFO L208 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] [2022-10-17 10:15:49,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-10-17 10:15:49,046 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:49,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1478547713, now seen corresponding path program 3 times [2022-10-17 10:15:49,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:49,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275250096] [2022-10-17 10:15:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:49,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:49,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:49,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275250096] [2022-10-17 10:15:49,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275250096] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:49,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326907394] [2022-10-17 10:15:49,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:15:49,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:15:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:15:49,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:15:49,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:15:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:15:49,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:15:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:15:49,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:15:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:49,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:15:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:49,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326907394] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:49,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:15:49,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-10-17 10:15:49,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513610803] [2022-10-17 10:15:49,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:49,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:49,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:49,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:15:49,276 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:49,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 221 transitions, 2959 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:49,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:49,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:49,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:49,612 INFO L130 PetriNetUnfolder]: 274/924 cut-off events. [2022-10-17 10:15:49,612 INFO L131 PetriNetUnfolder]: For 10002/10008 co-relation queries the response was YES. [2022-10-17 10:15:49,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4258 conditions, 924 events. 274/924 cut-off events. For 10002/10008 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5999 event pairs, 45 based on Foata normal form. 12/926 useless extension candidates. Maximal degree in co-relation 4210. Up to 169 conditions per place. [2022-10-17 10:15:49,628 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 122 selfloop transitions, 101 changer transitions 2/274 dead transitions. [2022-10-17 10:15:49,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 3985 flow [2022-10-17 10:15:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:15:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:15:49,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2022-10-17 10:15:49,631 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8180076628352491 [2022-10-17 10:15:49,631 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 427 transitions. [2022-10-17 10:15:49,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 427 transitions. [2022-10-17 10:15:49,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:49,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 427 transitions. [2022-10-17 10:15:49,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:49,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:49,634 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:49,634 INFO L175 Difference]: Start difference. First operand has 176 places, 221 transitions, 2959 flow. Second operand 6 states and 427 transitions. [2022-10-17 10:15:49,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 3985 flow [2022-10-17 10:15:49,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 274 transitions, 3850 flow, removed 20 selfloop flow, removed 7 redundant places. [2022-10-17 10:15:49,698 INFO L231 Difference]: Finished difference. Result has 177 places, 238 transitions, 3491 flow [2022-10-17 10:15:49,700 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3491, PETRI_PLACES=177, PETRI_TRANSITIONS=238} [2022-10-17 10:15:49,704 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 100 predicate places. [2022-10-17 10:15:49,705 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 238 transitions, 3491 flow [2022-10-17 10:15:49,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:49,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:49,705 INFO L208 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] [2022-10-17 10:15:49,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:15:49,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-10-17 10:15:49,931 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1216001191, now seen corresponding path program 5 times [2022-10-17 10:15:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:49,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542697200] [2022-10-17 10:15:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:49,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:49,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:49,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542697200] [2022-10-17 10:15:49,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542697200] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:49,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:49,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:15:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077447654] [2022-10-17 10:15:49,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:49,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:15:49,988 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:49,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 238 transitions, 3491 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:49,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:49,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:49,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:50,414 INFO L130 PetriNetUnfolder]: 255/845 cut-off events. [2022-10-17 10:15:50,414 INFO L131 PetriNetUnfolder]: For 11332/11350 co-relation queries the response was YES. [2022-10-17 10:15:50,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4282 conditions, 845 events. 255/845 cut-off events. For 11332/11350 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5285 event pairs, 52 based on Foata normal form. 8/843 useless extension candidates. Maximal degree in co-relation 4233. Up to 203 conditions per place. [2022-10-17 10:15:50,428 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 122 selfloop transitions, 98 changer transitions 2/271 dead transitions. [2022-10-17 10:15:50,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 271 transitions, 4175 flow [2022-10-17 10:15:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:15:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:15:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-10-17 10:15:50,430 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-10-17 10:15:50,430 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-10-17 10:15:50,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-10-17 10:15:50,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:50,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-10-17 10:15:50,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:50,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:50,434 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:50,434 INFO L175 Difference]: Start difference. First operand has 177 places, 238 transitions, 3491 flow. Second operand 8 states and 568 transitions. [2022-10-17 10:15:50,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 271 transitions, 4175 flow [2022-10-17 10:15:50,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 271 transitions, 4090 flow, removed 23 selfloop flow, removed 2 redundant places. [2022-10-17 10:15:50,500 INFO L231 Difference]: Finished difference. Result has 180 places, 233 transitions, 3532 flow [2022-10-17 10:15:50,501 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3532, PETRI_PLACES=180, PETRI_TRANSITIONS=233} [2022-10-17 10:15:50,504 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 103 predicate places. [2022-10-17 10:15:50,504 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 233 transitions, 3532 flow [2022-10-17 10:15:50,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:50,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:50,505 INFO L208 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] [2022-10-17 10:15:50,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-10-17 10:15:50,505 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1592299911, now seen corresponding path program 4 times [2022-10-17 10:15:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:50,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429145619] [2022-10-17 10:15:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:50,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429145619] [2022-10-17 10:15:50,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429145619] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:50,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474640688] [2022-10-17 10:15:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:15:50,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:15:50,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:15:50,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:15:50,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:15:50,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:15:50,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:15:50,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:15:50,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:15:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:50,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:15:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:50,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474640688] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:50,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:15:50,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-10-17 10:15:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620106094] [2022-10-17 10:15:50,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:50,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:15:50,728 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:50,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 233 transitions, 3532 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:50,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:50,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:50,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:15:51,031 INFO L130 PetriNetUnfolder]: 235/747 cut-off events. [2022-10-17 10:15:51,031 INFO L131 PetriNetUnfolder]: For 11153/11153 co-relation queries the response was YES. [2022-10-17 10:15:51,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3998 conditions, 747 events. 235/747 cut-off events. For 11153/11153 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4363 event pairs, 43 based on Foata normal form. 8/749 useless extension candidates. Maximal degree in co-relation 3950. Up to 229 conditions per place. [2022-10-17 10:15:51,043 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 137 selfloop transitions, 70 changer transitions 0/256 dead transitions. [2022-10-17 10:15:51,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 256 transitions, 4065 flow [2022-10-17 10:15:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:15:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:15:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-10-17 10:15:51,045 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-10-17 10:15:51,045 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-10-17 10:15:51,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-10-17 10:15:51,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:15:51,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-10-17 10:15:51,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:51,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:51,048 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:51,048 INFO L175 Difference]: Start difference. First operand has 180 places, 233 transitions, 3532 flow. Second operand 6 states and 426 transitions. [2022-10-17 10:15:51,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 256 transitions, 4065 flow [2022-10-17 10:15:51,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 256 transitions, 3871 flow, removed 23 selfloop flow, removed 6 redundant places. [2022-10-17 10:15:51,107 INFO L231 Difference]: Finished difference. Result has 181 places, 229 transitions, 3461 flow [2022-10-17 10:15:51,107 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3173, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3461, PETRI_PLACES=181, PETRI_TRANSITIONS=229} [2022-10-17 10:15:51,108 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 104 predicate places. [2022-10-17 10:15:51,108 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 229 transitions, 3461 flow [2022-10-17 10:15:51,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:51,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:15:51,109 INFO L208 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] [2022-10-17 10:15:51,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:15:51,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5632591-51a6-4e3a-a864-9dc3895dfdbd/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:15:51,323 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:15:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:15:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1032792189, now seen corresponding path program 5 times [2022-10-17 10:15:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:15:51,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324214143] [2022-10-17 10:15:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:15:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:15:51,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:15:51,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324214143] [2022-10-17 10:15:51,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324214143] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:15:51,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:15:51,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:15:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779463802] [2022-10-17 10:15:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:15:51,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:15:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:15:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:15:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:15:51,373 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-10-17 10:15:51,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 229 transitions, 3461 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:15:51,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:15:51,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-10-17 10:15:51,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand