./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:26:33,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:26:33,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:26:33,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:26:33,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:26:33,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:26:33,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:26:33,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:26:33,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:26:33,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:26:33,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:26:33,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:26:33,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:26:33,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:26:33,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:26:33,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:26:33,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:26:33,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:26:33,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:26:33,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:26:33,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:26:33,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:26:33,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:26:33,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:26:33,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:26:33,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:26:33,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:26:33,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:26:33,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:26:33,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:26:33,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:26:33,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:26:33,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:26:33,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:26:33,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:26:33,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:26:33,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:26:33,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:26:33,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:26:33,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:26:33,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:26:33,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:26:33,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:26:33,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:26:33,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:26:33,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:26:33,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:26:33,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:26:33,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:26:33,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:26:33,770 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:26:33,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:26:33,772 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:26:33,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:26:33,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:26:33,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:26:33,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:26:33,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:26:33,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:26:33,774 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:26:33,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:26:33,775 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:26:33,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:26:33,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:26:33,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:26:33,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:26:33,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:26:33,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:26:33,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:26:33,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:26:33,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:26:33,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:26:33,779 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:26:33,779 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:26:33,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:26:33,780 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_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-11-18 18:26:34,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:26:34,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:26:34,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:26:34,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:26:34,137 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:26:34,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-18 18:26:34,234 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/data/9a683faf8/393267e3ae204395aa2645ebc76e55a8/FLAGf11be5286 [2022-11-18 18:26:34,953 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:26:34,958 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-18 18:26:34,976 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/data/9a683faf8/393267e3ae204395aa2645ebc76e55a8/FLAGf11be5286 [2022-11-18 18:26:35,154 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/data/9a683faf8/393267e3ae204395aa2645ebc76e55a8 [2022-11-18 18:26:35,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:26:35,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:26:35,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:26:35,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:26:35,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:26:35,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:35,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@621fc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35, skipping insertion in model container [2022-11-18 18:26:35,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:35,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:26:35,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:26:35,801 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-18 18:26:35,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:26:35,845 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:26:35,897 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-18 18:26:35,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:26:35,945 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:26:35,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35 WrapperNode [2022-11-18 18:26:35,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:26:35,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:26:35,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:26:35,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:26:35,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:35,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:35,997 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-18 18:26:35,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:26:35,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:26:35,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:26:35,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:26:36,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:26:36,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:26:36,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:26:36,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:26:36,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (1/1) ... [2022-11-18 18:26:36,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:26:36,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:36,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:26:36,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:26:36,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:26:36,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:26:36,152 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 18:26:36,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:26:36,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:26:36,153 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 18:26:36,153 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 18:26:36,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:26:36,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:26:36,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:26:36,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:26:36,159 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:26:36,334 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:26:36,336 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:26:36,614 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:26:36,622 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:26:36,652 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-18 18:26:36,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:26:36 BoogieIcfgContainer [2022-11-18 18:26:36,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:26:36,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:26:36,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:26:36,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:26:36,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:26:35" (1/3) ... [2022-11-18 18:26:36,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3801c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:26:36, skipping insertion in model container [2022-11-18 18:26:36,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:26:35" (2/3) ... [2022-11-18 18:26:36,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3801c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:26:36, skipping insertion in model container [2022-11-18 18:26:36,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:26:36" (3/3) ... [2022-11-18 18:26:36,686 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-11-18 18:26:36,702 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:26:36,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:26:36,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:26:36,724 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:26:36,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:36,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-11-18 18:26:37,044 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-11-18 18:26:37,047 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:37,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-11-18 18:26:37,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 211 flow [2022-11-18 18:26:37,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 211 flow [2022-11-18 18:26:37,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:37,104 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:37,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:37,164 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-18 18:26:37,164 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:37,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:37,167 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:37,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:37,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1988388570, now seen corresponding path program 1 times [2022-11-18 18:26:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:37,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325148848] [2022-11-18 18:26:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:37,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:37,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325148848] [2022-11-18 18:26:37,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325148848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:37,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:37,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:37,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145228512] [2022-11-18 18:26:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:37,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:37,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:37,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 103 [2022-11-18 18:26:37,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 211 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:37,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:37,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 103 [2022-11-18 18:26:37,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:37,625 INFO L130 PetriNetUnfolder]: 0/118 cut-off events. [2022-11-18 18:26:37,625 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 18:26:37,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 118 events. 0/118 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 14/128 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-18 18:26:37,627 INFO L137 encePairwiseOnDemand]: 93/103 looper letters, 1 selfloop transitions, 0 changer transitions 11/92 dead transitions. [2022-11-18 18:26:37,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 191 flow [2022-11-18 18:26:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2022-11-18 18:26:37,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9368932038834952 [2022-11-18 18:26:37,644 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2022-11-18 18:26:37,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2022-11-18 18:26:37,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:37,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2022-11-18 18:26:37,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:37,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:37,658 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:37,660 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 211 flow. Second operand 2 states and 193 transitions. [2022-11-18 18:26:37,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 191 flow [2022-11-18 18:26:37,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:37,668 INFO L231 Difference]: Finished difference. Result has 96 places, 81 transitions, 167 flow [2022-11-18 18:26:37,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=167, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2022-11-18 18:26:37,675 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-11-18 18:26:37,675 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 167 flow [2022-11-18 18:26:37,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:37,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:37,676 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:26:37,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash 191437211, now seen corresponding path program 1 times [2022-11-18 18:26:37,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:37,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449516967] [2022-11-18 18:26:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:37,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:37,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:37,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449516967] [2022-11-18 18:26:37,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449516967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:37,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:37,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:37,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591202232] [2022-11-18 18:26:37,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:37,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:37,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:37,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:37,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 103 [2022-11-18 18:26:37,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:37,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:37,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 103 [2022-11-18 18:26:37,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:38,025 INFO L130 PetriNetUnfolder]: 0/85 cut-off events. [2022-11-18 18:26:38,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:38,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 85 events. 0/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-18 18:26:38,032 INFO L137 encePairwiseOnDemand]: 100/103 looper letters, 8 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-11-18 18:26:38,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 191 flow [2022-11-18 18:26:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2022-11-18 18:26:38,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8511326860841424 [2022-11-18 18:26:38,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2022-11-18 18:26:38,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2022-11-18 18:26:38,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:38,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2022-11-18 18:26:38,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,042 INFO L175 Difference]: Start difference. First operand has 96 places, 81 transitions, 167 flow. Second operand 3 states and 263 transitions. [2022-11-18 18:26:38,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 191 flow [2022-11-18 18:26:38,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:38,050 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 175 flow [2022-11-18 18:26:38,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2022-11-18 18:26:38,051 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2022-11-18 18:26:38,051 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 175 flow [2022-11-18 18:26:38,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:38,052 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:38,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:26:38,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1240291001, now seen corresponding path program 1 times [2022-11-18 18:26:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:38,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052532285] [2022-11-18 18:26:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:38,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:38,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:38,154 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:38,154 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:38,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:38,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:38,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:26:38,158 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-18 18:26:38,161 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:38,161 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 18:26:38,186 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:38,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-11-18 18:26:38,230 INFO L130 PetriNetUnfolder]: 24/203 cut-off events. [2022-11-18 18:26:38,230 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:26:38,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 548 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-11-18 18:26:38,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 284 flow [2022-11-18 18:26:38,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 284 flow [2022-11-18 18:26:38,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:38,238 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:38,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:38,250 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:38,250 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:38,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:38,250 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:38,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash 4988122, now seen corresponding path program 1 times [2022-11-18 18:26:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:38,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026817364] [2022-11-18 18:26:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:38,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:38,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:38,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026817364] [2022-11-18 18:26:38,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026817364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:38,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:38,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:38,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976369434] [2022-11-18 18:26:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:38,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:38,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:38,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 136 [2022-11-18 18:26:38,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 136 transitions, 284 flow. Second operand has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:38,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 136 [2022-11-18 18:26:38,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:38,362 INFO L130 PetriNetUnfolder]: 0/176 cut-off events. [2022-11-18 18:26:38,362 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:26:38,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 176 events. 0/176 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 406 event pairs, 0 based on Foata normal form. 26/196 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-11-18 18:26:38,363 INFO L137 encePairwiseOnDemand]: 120/136 looper letters, 2 selfloop transitions, 0 changer transitions 11/119 dead transitions. [2022-11-18 18:26:38,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 119 transitions, 254 flow [2022-11-18 18:26:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:38,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 252 transitions. [2022-11-18 18:26:38,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9264705882352942 [2022-11-18 18:26:38,366 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 252 transitions. [2022-11-18 18:26:38,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 252 transitions. [2022-11-18 18:26:38,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:38,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 252 transitions. [2022-11-18 18:26:38,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 126.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,370 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,370 INFO L175 Difference]: Start difference. First operand has 125 places, 136 transitions, 284 flow. Second operand 2 states and 252 transitions. [2022-11-18 18:26:38,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 119 transitions, 254 flow [2022-11-18 18:26:38,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 252 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:38,374 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 226 flow [2022-11-18 18:26:38,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=226, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2022-11-18 18:26:38,376 INFO L288 CegarLoopForPetriNet]: 125 programPoint places, 0 predicate places. [2022-11-18 18:26:38,376 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 226 flow [2022-11-18 18:26:38,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:38,377 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:38,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:26:38,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:38,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1791963237, now seen corresponding path program 1 times [2022-11-18 18:26:38,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:38,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364536430] [2022-11-18 18:26:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:38,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:38,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:38,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364536430] [2022-11-18 18:26:38,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364536430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:38,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:38,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:38,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386185260] [2022-11-18 18:26:38,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:38,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:38,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:38,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:38,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 136 [2022-11-18 18:26:38,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:38,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 136 [2022-11-18 18:26:38,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:38,538 INFO L130 PetriNetUnfolder]: 0/132 cut-off events. [2022-11-18 18:26:38,538 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 18:26:38,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 132 events. 0/132 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 202 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-18 18:26:38,539 INFO L137 encePairwiseOnDemand]: 133/136 looper letters, 11 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2022-11-18 18:26:38,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 260 flow [2022-11-18 18:26:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2022-11-18 18:26:38,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8431372549019608 [2022-11-18 18:26:38,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2022-11-18 18:26:38,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2022-11-18 18:26:38,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:38,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2022-11-18 18:26:38,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,547 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 226 flow. Second operand 3 states and 344 transitions. [2022-11-18 18:26:38,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 260 flow [2022-11-18 18:26:38,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 112 transitions, 260 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:38,551 INFO L231 Difference]: Finished difference. Result has 117 places, 109 transitions, 238 flow [2022-11-18 18:26:38,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=117, PETRI_TRANSITIONS=109} [2022-11-18 18:26:38,552 INFO L288 CegarLoopForPetriNet]: 125 programPoint places, -8 predicate places. [2022-11-18 18:26:38,552 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 109 transitions, 238 flow [2022-11-18 18:26:38,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:38,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:38,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:26:38,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:38,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1100688273, now seen corresponding path program 1 times [2022-11-18 18:26:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:38,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458371987] [2022-11-18 18:26:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:38,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:38,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:38,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458371987] [2022-11-18 18:26:38,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458371987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:38,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572214786] [2022-11-18 18:26:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:38,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:38,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:38,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:38,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:26:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:26:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:38,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:38,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572214786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:38,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:38,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:26:38,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705879074] [2022-11-18 18:26:38,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:38,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:26:38,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:38,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:26:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:26:38,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 136 [2022-11-18 18:26:38,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 109 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:38,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:38,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 136 [2022-11-18 18:26:38,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:39,048 INFO L130 PetriNetUnfolder]: 0/110 cut-off events. [2022-11-18 18:26:39,048 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 18:26:39,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-18 18:26:39,049 INFO L137 encePairwiseOnDemand]: 131/136 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-11-18 18:26:39,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-11-18 18:26:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:26:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:26:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 999 transitions. [2022-11-18 18:26:39,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8161764705882353 [2022-11-18 18:26:39,053 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 999 transitions. [2022-11-18 18:26:39,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 999 transitions. [2022-11-18 18:26:39,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:39,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 999 transitions. [2022-11-18 18:26:39,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.0) internal successors, (999), 9 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,062 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,063 INFO L175 Difference]: Start difference. First operand has 117 places, 109 transitions, 238 flow. Second operand 9 states and 999 transitions. [2022-11-18 18:26:39,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-11-18 18:26:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:39,087 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-11-18 18:26:39,088 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-11-18 18:26:39,088 INFO L288 CegarLoopForPetriNet]: 125 programPoint places, -12 predicate places. [2022-11-18 18:26:39,089 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-11-18 18:26:39,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:39,090 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:39,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:39,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:39,298 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash -301480164, now seen corresponding path program 1 times [2022-11-18 18:26:39,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:39,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114538341] [2022-11-18 18:26:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:39,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:39,323 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:39,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:39,347 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:39,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:39,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:26:39,348 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 18:26:39,349 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:39,349 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 18:26:39,378 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:39,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-11-18 18:26:39,435 INFO L130 PetriNetUnfolder]: 34/272 cut-off events. [2022-11-18 18:26:39,435 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:26:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 798 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-11-18 18:26:39,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 359 flow [2022-11-18 18:26:39,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 359 flow [2022-11-18 18:26:39,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:39,446 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:39,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:39,455 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:39,455 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:39,455 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:39,455 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:39,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:39,456 INFO L85 PathProgramCache]: Analyzing trace with hash 445740442, now seen corresponding path program 1 times [2022-11-18 18:26:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:39,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186194796] [2022-11-18 18:26:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:39,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:39,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:39,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186194796] [2022-11-18 18:26:39,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186194796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:39,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:39,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950702935] [2022-11-18 18:26:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:39,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:39,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 169 [2022-11-18 18:26:39,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 169 transitions, 359 flow. Second operand has 2 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:39,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 169 [2022-11-18 18:26:39,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:39,534 INFO L130 PetriNetUnfolder]: 0/234 cut-off events. [2022-11-18 18:26:39,534 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-18 18:26:39,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 234 events. 0/234 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 653 event pairs, 0 based on Foata normal form. 42/268 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-18 18:26:39,535 INFO L137 encePairwiseOnDemand]: 147/169 looper letters, 3 selfloop transitions, 0 changer transitions 11/146 dead transitions. [2022-11-18 18:26:39,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 146 transitions, 319 flow [2022-11-18 18:26:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 311 transitions. [2022-11-18 18:26:39,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9201183431952663 [2022-11-18 18:26:39,537 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 311 transitions. [2022-11-18 18:26:39,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 311 transitions. [2022-11-18 18:26:39,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:39,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 311 transitions. [2022-11-18 18:26:39,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,541 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,541 INFO L175 Difference]: Start difference. First operand has 154 places, 169 transitions, 359 flow. Second operand 2 states and 311 transitions. [2022-11-18 18:26:39,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 146 transitions, 319 flow [2022-11-18 18:26:39,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 146 transitions, 313 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:39,545 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 285 flow [2022-11-18 18:26:39,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=285, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2022-11-18 18:26:39,546 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 0 predicate places. [2022-11-18 18:26:39,546 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 285 flow [2022-11-18 18:26:39,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:39,547 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:39,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:26:39,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1351210917, now seen corresponding path program 1 times [2022-11-18 18:26:39,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:39,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580266988] [2022-11-18 18:26:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:39,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:39,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:39,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580266988] [2022-11-18 18:26:39,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580266988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:39,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:39,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:39,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520907196] [2022-11-18 18:26:39,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:39,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:39,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:39,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 169 [2022-11-18 18:26:39,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:39,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 169 [2022-11-18 18:26:39,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:39,676 INFO L130 PetriNetUnfolder]: 0/179 cut-off events. [2022-11-18 18:26:39,676 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:26:39,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 179 events. 0/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 373 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-18 18:26:39,677 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 12 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2022-11-18 18:26:39,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 321 flow [2022-11-18 18:26:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2022-11-18 18:26:39,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.834319526627219 [2022-11-18 18:26:39,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2022-11-18 18:26:39,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2022-11-18 18:26:39,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:39,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2022-11-18 18:26:39,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,683 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 285 flow. Second operand 3 states and 423 transitions. [2022-11-18 18:26:39,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 321 flow [2022-11-18 18:26:39,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 139 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:39,686 INFO L231 Difference]: Finished difference. Result has 146 places, 136 transitions, 297 flow [2022-11-18 18:26:39,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=146, PETRI_TRANSITIONS=136} [2022-11-18 18:26:39,687 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, -8 predicate places. [2022-11-18 18:26:39,687 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 136 transitions, 297 flow [2022-11-18 18:26:39,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:39,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:39,688 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:39,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:26:39,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:39,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1276471569, now seen corresponding path program 1 times [2022-11-18 18:26:39,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:39,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926596022] [2022-11-18 18:26:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:39,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:39,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926596022] [2022-11-18 18:26:39,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926596022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:39,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234597822] [2022-11-18 18:26:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:39,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:39,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:39,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:39,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:26:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:26:39,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:39,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:40,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234597822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:40,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:40,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:26:40,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190950488] [2022-11-18 18:26:40,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:40,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:26:40,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:26:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:26:40,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-11-18 18:26:40,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 136 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:40,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-11-18 18:26:40,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:40,197 INFO L130 PetriNetUnfolder]: 0/157 cut-off events. [2022-11-18 18:26:40,197 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:26:40,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 157 events. 0/157 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 2/159 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-18 18:26:40,200 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/146 dead transitions. [2022-11-18 18:26:40,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 146 transitions, 363 flow [2022-11-18 18:26:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:26:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:26:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1239 transitions. [2022-11-18 18:26:40,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.814595660749507 [2022-11-18 18:26:40,204 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1239 transitions. [2022-11-18 18:26:40,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1239 transitions. [2022-11-18 18:26:40,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:40,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1239 transitions. [2022-11-18 18:26:40,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.66666666666666) internal successors, (1239), 9 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,213 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,213 INFO L175 Difference]: Start difference. First operand has 146 places, 136 transitions, 297 flow. Second operand 9 states and 1239 transitions. [2022-11-18 18:26:40,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 146 transitions, 363 flow [2022-11-18 18:26:40,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 146 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:40,218 INFO L231 Difference]: Finished difference. Result has 156 places, 142 transitions, 345 flow [2022-11-18 18:26:40,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=345, PETRI_PLACES=156, PETRI_TRANSITIONS=142} [2022-11-18 18:26:40,222 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 2 predicate places. [2022-11-18 18:26:40,222 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 142 transitions, 345 flow [2022-11-18 18:26:40,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:40,224 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:40,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:40,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:26:40,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash -264173582, now seen corresponding path program 1 times [2022-11-18 18:26:40,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546687915] [2022-11-18 18:26:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:40,469 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:40,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:40,515 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:40,515 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:40,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:40,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 18:26:40,516 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 18:26:40,517 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:40,517 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 18:26:40,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:40,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-11-18 18:26:40,648 INFO L130 PetriNetUnfolder]: 44/341 cut-off events. [2022-11-18 18:26:40,648 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 18:26:40,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1076 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-11-18 18:26:40,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 436 flow [2022-11-18 18:26:40,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 436 flow [2022-11-18 18:26:40,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:40,661 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:40,662 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:40,669 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:40,669 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:40,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:40,669 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:40,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash -984321766, now seen corresponding path program 1 times [2022-11-18 18:26:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234109998] [2022-11-18 18:26:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:40,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:40,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234109998] [2022-11-18 18:26:40,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234109998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:40,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:40,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:40,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866297133] [2022-11-18 18:26:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:40,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:40,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:40,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 202 [2022-11-18 18:26:40,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 202 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:40,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 202 [2022-11-18 18:26:40,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:40,816 INFO L130 PetriNetUnfolder]: 0/292 cut-off events. [2022-11-18 18:26:40,816 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-18 18:26:40,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 292 events. 0/292 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 900 event pairs, 0 based on Foata normal form. 64/346 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-11-18 18:26:40,817 INFO L137 encePairwiseOnDemand]: 174/202 looper letters, 4 selfloop transitions, 0 changer transitions 11/173 dead transitions. [2022-11-18 18:26:40,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 386 flow [2022-11-18 18:26:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 370 transitions. [2022-11-18 18:26:40,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9158415841584159 [2022-11-18 18:26:40,820 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 370 transitions. [2022-11-18 18:26:40,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 370 transitions. [2022-11-18 18:26:40,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:40,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 370 transitions. [2022-11-18 18:26:40,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,823 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,824 INFO L175 Difference]: Start difference. First operand has 183 places, 202 transitions, 436 flow. Second operand 2 states and 370 transitions. [2022-11-18 18:26:40,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 386 flow [2022-11-18 18:26:40,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 173 transitions, 374 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:40,830 INFO L231 Difference]: Finished difference. Result has 183 places, 162 transitions, 344 flow [2022-11-18 18:26:40,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=183, PETRI_TRANSITIONS=162} [2022-11-18 18:26:40,832 INFO L288 CegarLoopForPetriNet]: 183 programPoint places, 0 predicate places. [2022-11-18 18:26:40,834 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 162 transitions, 344 flow [2022-11-18 18:26:40,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:40,835 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:40,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:26:40,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1513694171, now seen corresponding path program 1 times [2022-11-18 18:26:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:40,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95865529] [2022-11-18 18:26:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:40,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:40,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:40,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95865529] [2022-11-18 18:26:40,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95865529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:40,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:40,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:40,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902248375] [2022-11-18 18:26:40,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:40,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:40,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:40,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:40,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 202 [2022-11-18 18:26:40,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 162 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:40,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 202 [2022-11-18 18:26:40,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:40,982 INFO L130 PetriNetUnfolder]: 0/226 cut-off events. [2022-11-18 18:26:40,982 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 18:26:40,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 226 events. 0/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 542 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-18 18:26:40,983 INFO L137 encePairwiseOnDemand]: 199/202 looper letters, 13 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-11-18 18:26:40,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 166 transitions, 382 flow [2022-11-18 18:26:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-11-18 18:26:40,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8283828382838284 [2022-11-18 18:26:40,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-11-18 18:26:40,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-11-18 18:26:40,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:40,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-11-18 18:26:40,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,990 INFO L175 Difference]: Start difference. First operand has 183 places, 162 transitions, 344 flow. Second operand 3 states and 502 transitions. [2022-11-18 18:26:40,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 166 transitions, 382 flow [2022-11-18 18:26:40,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 166 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:40,994 INFO L231 Difference]: Finished difference. Result has 175 places, 163 transitions, 356 flow [2022-11-18 18:26:40,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=175, PETRI_TRANSITIONS=163} [2022-11-18 18:26:40,996 INFO L288 CegarLoopForPetriNet]: 183 programPoint places, -8 predicate places. [2022-11-18 18:26:40,997 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 163 transitions, 356 flow [2022-11-18 18:26:40,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:40,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:40,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:40,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:26:41,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:41,005 INFO L85 PathProgramCache]: Analyzing trace with hash -260026161, now seen corresponding path program 1 times [2022-11-18 18:26:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:41,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307251616] [2022-11-18 18:26:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:41,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:41,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307251616] [2022-11-18 18:26:41,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307251616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880438330] [2022-11-18 18:26:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:41,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:41,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:41,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:26:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:41,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:26:41,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:41,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:41,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880438330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:41,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:41,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:26:41,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003971677] [2022-11-18 18:26:41,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:41,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:26:41,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:26:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:26:41,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-11-18 18:26:41,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 163 transitions, 356 flow. Second operand has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:41,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:41,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-11-18 18:26:41,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:41,478 INFO L130 PetriNetUnfolder]: 0/204 cut-off events. [2022-11-18 18:26:41,479 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 18:26:41,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 204 events. 0/204 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 412 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-18 18:26:41,480 INFO L137 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-11-18 18:26:41,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 424 flow [2022-11-18 18:26:41,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:26:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:26:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1474 transitions. [2022-11-18 18:26:41,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8107810781078107 [2022-11-18 18:26:41,484 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1474 transitions. [2022-11-18 18:26:41,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1474 transitions. [2022-11-18 18:26:41,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:41,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1474 transitions. [2022-11-18 18:26:41,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.77777777777777) internal successors, (1474), 9 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:41,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:41,495 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:41,496 INFO L175 Difference]: Start difference. First operand has 175 places, 163 transitions, 356 flow. Second operand 9 states and 1474 transitions. [2022-11-18 18:26:41,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 424 flow [2022-11-18 18:26:41,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 173 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:41,501 INFO L231 Difference]: Finished difference. Result has 185 places, 169 transitions, 404 flow [2022-11-18 18:26:41,502 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=404, PETRI_PLACES=185, PETRI_TRANSITIONS=169} [2022-11-18 18:26:41,503 INFO L288 CegarLoopForPetriNet]: 183 programPoint places, 2 predicate places. [2022-11-18 18:26:41,503 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 169 transitions, 404 flow [2022-11-18 18:26:41,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:41,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:41,504 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:41,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:41,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:26:41,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1507666822, now seen corresponding path program 1 times [2022-11-18 18:26:41,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:41,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760618277] [2022-11-18 18:26:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:41,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760618277] [2022-11-18 18:26:41,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760618277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:41,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222784303] [2022-11-18 18:26:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:41,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:41,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:41,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:26:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:26:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:42,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:42,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222784303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:42,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:42,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:26:42,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977331997] [2022-11-18 18:26:42,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:42,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:26:42,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:42,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:26:42,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:26:42,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-11-18 18:26:42,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 169 transitions, 404 flow. Second operand has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:42,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-11-18 18:26:42,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:42,480 INFO L130 PetriNetUnfolder]: 0/182 cut-off events. [2022-11-18 18:26:42,480 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-18 18:26:42,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-18 18:26:42,481 INFO L137 encePairwiseOnDemand]: 197/202 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-11-18 18:26:42,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-11-18 18:26:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:26:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-18 18:26:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2445 transitions. [2022-11-18 18:26:42,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.806930693069307 [2022-11-18 18:26:42,488 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2445 transitions. [2022-11-18 18:26:42,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2445 transitions. [2022-11-18 18:26:42,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:42,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2445 transitions. [2022-11-18 18:26:42,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,502 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,502 INFO L175 Difference]: Start difference. First operand has 185 places, 169 transitions, 404 flow. Second operand 15 states and 2445 transitions. [2022-11-18 18:26:42,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-11-18 18:26:42,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-18 18:26:42,506 INFO L231 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-11-18 18:26:42,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-11-18 18:26:42,508 INFO L288 CegarLoopForPetriNet]: 183 programPoint places, 1 predicate places. [2022-11-18 18:26:42,508 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-11-18 18:26:42,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:42,510 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:42,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:26:42,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash 721757289, now seen corresponding path program 1 times [2022-11-18 18:26:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:42,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481777675] [2022-11-18 18:26:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:42,735 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:42,757 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:42,757 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:42,758 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:42,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:42,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 18:26:42,758 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 18:26:42,759 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:42,759 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-18 18:26:42,783 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:42,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 235 transitions, 515 flow [2022-11-18 18:26:42,851 INFO L130 PetriNetUnfolder]: 54/410 cut-off events. [2022-11-18 18:26:42,851 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 18:26:42,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 410 events. 54/410 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1315 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 354. Up to 12 conditions per place. [2022-11-18 18:26:42,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 235 transitions, 515 flow [2022-11-18 18:26:42,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 235 transitions, 515 flow [2022-11-18 18:26:42,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:42,861 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:42,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:42,867 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:42,868 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:42,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:42,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:42,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:42,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash 9768794, now seen corresponding path program 1 times [2022-11-18 18:26:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:42,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833039368] [2022-11-18 18:26:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:42,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:42,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:42,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833039368] [2022-11-18 18:26:42,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833039368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:42,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:42,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835972537] [2022-11-18 18:26:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:42,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:42,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 235 [2022-11-18 18:26:42,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 515 flow. Second operand has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:42,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 235 [2022-11-18 18:26:42,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:42,977 INFO L130 PetriNetUnfolder]: 0/350 cut-off events. [2022-11-18 18:26:42,977 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-18 18:26:42,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 350 events. 0/350 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1147 event pairs, 0 based on Foata normal form. 92/430 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-18 18:26:42,979 INFO L137 encePairwiseOnDemand]: 201/235 looper letters, 5 selfloop transitions, 0 changer transitions 11/200 dead transitions. [2022-11-18 18:26:42,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 455 flow [2022-11-18 18:26:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 429 transitions. [2022-11-18 18:26:42,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9127659574468086 [2022-11-18 18:26:42,981 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 429 transitions. [2022-11-18 18:26:42,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 429 transitions. [2022-11-18 18:26:42,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:42,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 429 transitions. [2022-11-18 18:26:42,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 214.5) internal successors, (429), 2 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) [2022-11-18 18:26:42,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,984 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,985 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 515 flow. Second operand 2 states and 429 transitions. [2022-11-18 18:26:42,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 455 flow [2022-11-18 18:26:42,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 200 transitions, 435 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:42,989 INFO L231 Difference]: Finished difference. Result has 212 places, 189 transitions, 403 flow [2022-11-18 18:26:42,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=403, PETRI_PLACES=212, PETRI_TRANSITIONS=189} [2022-11-18 18:26:42,990 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, 0 predicate places. [2022-11-18 18:26:42,990 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 189 transitions, 403 flow [2022-11-18 18:26:42,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:42,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:42,991 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:42,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 18:26:42,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:42,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1787182565, now seen corresponding path program 1 times [2022-11-18 18:26:42,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:42,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900875070] [2022-11-18 18:26:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:42,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:43,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:43,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900875070] [2022-11-18 18:26:43,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900875070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:43,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:43,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:43,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002434377] [2022-11-18 18:26:43,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:43,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 235 [2022-11-18 18:26:43,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 189 transitions, 403 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:43,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 235 [2022-11-18 18:26:43,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:43,104 INFO L130 PetriNetUnfolder]: 0/273 cut-off events. [2022-11-18 18:26:43,104 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 18:26:43,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 273 events. 0/273 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 713 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-18 18:26:43,105 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 14 selfloop transitions, 2 changer transitions 0/193 dead transitions. [2022-11-18 18:26:43,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 193 transitions, 443 flow [2022-11-18 18:26:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-11-18 18:26:43,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8241134751773049 [2022-11-18 18:26:43,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-11-18 18:26:43,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-11-18 18:26:43,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:43,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-11-18 18:26:43,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,112 INFO L175 Difference]: Start difference. First operand has 212 places, 189 transitions, 403 flow. Second operand 3 states and 581 transitions. [2022-11-18 18:26:43,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 193 transitions, 443 flow [2022-11-18 18:26:43,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 193 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:43,116 INFO L231 Difference]: Finished difference. Result has 204 places, 190 transitions, 415 flow [2022-11-18 18:26:43,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=204, PETRI_TRANSITIONS=190} [2022-11-18 18:26:43,117 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, -8 predicate places. [2022-11-18 18:26:43,118 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 190 transitions, 415 flow [2022-11-18 18:26:43,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:43,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:43,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 18:26:43,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1948647951, now seen corresponding path program 1 times [2022-11-18 18:26:43,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:43,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64580196] [2022-11-18 18:26:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:43,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:43,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64580196] [2022-11-18 18:26:43,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64580196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:43,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852323874] [2022-11-18 18:26:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:43,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:43,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:43,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:43,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:26:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:26:43,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:43,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:43,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852323874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:43,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:43,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:26:43,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981552109] [2022-11-18 18:26:43,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:43,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:26:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:26:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:26:43,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-11-18 18:26:43,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 190 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:43,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-11-18 18:26:43,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:43,576 INFO L130 PetriNetUnfolder]: 0/251 cut-off events. [2022-11-18 18:26:43,577 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:26:43,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 251 events. 0/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 582 event pairs, 0 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-18 18:26:43,578 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 15 selfloop transitions, 9 changer transitions 0/200 dead transitions. [2022-11-18 18:26:43,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 485 flow [2022-11-18 18:26:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:26:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:26:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1709 transitions. [2022-11-18 18:26:43,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8080378250591016 [2022-11-18 18:26:43,584 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1709 transitions. [2022-11-18 18:26:43,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1709 transitions. [2022-11-18 18:26:43,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:43,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1709 transitions. [2022-11-18 18:26:43,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.88888888888889) internal successors, (1709), 9 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,596 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,596 INFO L175 Difference]: Start difference. First operand has 204 places, 190 transitions, 415 flow. Second operand 9 states and 1709 transitions. [2022-11-18 18:26:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 485 flow [2022-11-18 18:26:43,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 200 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:43,601 INFO L231 Difference]: Finished difference. Result has 214 places, 196 transitions, 463 flow [2022-11-18 18:26:43,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=463, PETRI_PLACES=214, PETRI_TRANSITIONS=196} [2022-11-18 18:26:43,602 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, 2 predicate places. [2022-11-18 18:26:43,603 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 196 transitions, 463 flow [2022-11-18 18:26:43,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:43,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:43,604 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:43,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:43,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:43,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1867475898, now seen corresponding path program 1 times [2022-11-18 18:26:43,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:43,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965076066] [2022-11-18 18:26:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:43,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:43,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965076066] [2022-11-18 18:26:43,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965076066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877512284] [2022-11-18 18:26:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:43,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:43,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:43,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:43,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:26:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:44,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:26:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:44,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:44,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877512284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:44,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:44,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:26:44,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481327249] [2022-11-18 18:26:44,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:44,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:26:44,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:26:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:26:44,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-11-18 18:26:44,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 196 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:44,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:44,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-11-18 18:26:44,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:44,685 INFO L130 PetriNetUnfolder]: 0/218 cut-off events. [2022-11-18 18:26:44,685 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-18 18:26:44,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-18 18:26:44,686 INFO L137 encePairwiseOnDemand]: 230/235 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-11-18 18:26:44,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 200 transitions, 565 flow [2022-11-18 18:26:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:26:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 18:26:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3403 transitions. [2022-11-18 18:26:44,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8044917257683215 [2022-11-18 18:26:44,696 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3403 transitions. [2022-11-18 18:26:44,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3403 transitions. [2022-11-18 18:26:44,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:44,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3403 transitions. [2022-11-18 18:26:44,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.05555555555554) internal successors, (3403), 18 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:44,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:44,715 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:44,715 INFO L175 Difference]: Start difference. First operand has 214 places, 196 transitions, 463 flow. Second operand 18 states and 3403 transitions. [2022-11-18 18:26:44,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 200 transitions, 565 flow [2022-11-18 18:26:44,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-18 18:26:44,721 INFO L231 Difference]: Finished difference. Result has 216 places, 191 transitions, 480 flow [2022-11-18 18:26:44,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=216, PETRI_TRANSITIONS=191} [2022-11-18 18:26:44,723 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, 4 predicate places. [2022-11-18 18:26:44,723 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 191 transitions, 480 flow [2022-11-18 18:26:44,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:44,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:44,725 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:44,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:44,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:44,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1125299489, now seen corresponding path program 1 times [2022-11-18 18:26:44,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:44,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127549907] [2022-11-18 18:26:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:44,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:44,951 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:44,974 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:44,974 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:44,974 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:44,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 18:26:44,975 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 18:26:44,975 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:44,975 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-18 18:26:45,011 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:45,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 268 transitions, 596 flow [2022-11-18 18:26:45,096 INFO L130 PetriNetUnfolder]: 64/479 cut-off events. [2022-11-18 18:26:45,096 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-18 18:26:45,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 479 events. 64/479 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1576 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 429. Up to 14 conditions per place. [2022-11-18 18:26:45,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 268 transitions, 596 flow [2022-11-18 18:26:45,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 268 transitions, 596 flow [2022-11-18 18:26:45,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:45,110 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:45,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:45,120 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:45,120 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:45,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:45,121 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:45,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash -866955174, now seen corresponding path program 1 times [2022-11-18 18:26:45,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:45,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024584583] [2022-11-18 18:26:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:45,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:45,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024584583] [2022-11-18 18:26:45,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024584583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:45,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:45,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:45,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210166217] [2022-11-18 18:26:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:45,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:45,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:45,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:45,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 268 [2022-11-18 18:26:45,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 268 transitions, 596 flow. Second operand has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:45,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 268 [2022-11-18 18:26:45,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:45,296 INFO L130 PetriNetUnfolder]: 0/408 cut-off events. [2022-11-18 18:26:45,296 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-18 18:26:45,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 408 events. 0/408 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1394 event pairs, 0 based on Foata normal form. 126/520 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-18 18:26:45,298 INFO L137 encePairwiseOnDemand]: 228/268 looper letters, 6 selfloop transitions, 0 changer transitions 11/227 dead transitions. [2022-11-18 18:26:45,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 526 flow [2022-11-18 18:26:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 488 transitions. [2022-11-18 18:26:45,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9104477611940298 [2022-11-18 18:26:45,301 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 488 transitions. [2022-11-18 18:26:45,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 488 transitions. [2022-11-18 18:26:45,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:45,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 488 transitions. [2022-11-18 18:26:45,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.0) internal successors, (488), 2 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,306 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,307 INFO L175 Difference]: Start difference. First operand has 241 places, 268 transitions, 596 flow. Second operand 2 states and 488 transitions. [2022-11-18 18:26:45,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 526 flow [2022-11-18 18:26:45,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 227 transitions, 496 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:45,314 INFO L231 Difference]: Finished difference. Result has 241 places, 216 transitions, 462 flow [2022-11-18 18:26:45,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=462, PETRI_PLACES=241, PETRI_TRANSITIONS=216} [2022-11-18 18:26:45,315 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 0 predicate places. [2022-11-18 18:26:45,316 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 216 transitions, 462 flow [2022-11-18 18:26:45,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:45,316 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:45,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 18:26:45,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:45,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1631060763, now seen corresponding path program 1 times [2022-11-18 18:26:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:45,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514482789] [2022-11-18 18:26:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:45,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:45,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:45,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514482789] [2022-11-18 18:26:45,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514482789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:45,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:45,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:45,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125290461] [2022-11-18 18:26:45,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:45,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:45,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:45,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 268 [2022-11-18 18:26:45,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 216 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:45,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 268 [2022-11-18 18:26:45,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:45,545 INFO L130 PetriNetUnfolder]: 0/320 cut-off events. [2022-11-18 18:26:45,545 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:26:45,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 320 events. 0/320 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 884 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-18 18:26:45,547 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 15 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-11-18 18:26:45,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 220 transitions, 504 flow [2022-11-18 18:26:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2022-11-18 18:26:45,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8208955223880597 [2022-11-18 18:26:45,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2022-11-18 18:26:45,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2022-11-18 18:26:45,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:45,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2022-11-18 18:26:45,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,556 INFO L175 Difference]: Start difference. First operand has 241 places, 216 transitions, 462 flow. Second operand 3 states and 660 transitions. [2022-11-18 18:26:45,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 220 transitions, 504 flow [2022-11-18 18:26:45,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 220 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:45,562 INFO L231 Difference]: Finished difference. Result has 233 places, 217 transitions, 474 flow [2022-11-18 18:26:45,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=233, PETRI_TRANSITIONS=217} [2022-11-18 18:26:45,563 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, -8 predicate places. [2022-11-18 18:26:45,563 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 217 transitions, 474 flow [2022-11-18 18:26:45,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:45,564 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:45,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 18:26:45,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1054583471, now seen corresponding path program 1 times [2022-11-18 18:26:45,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:45,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682355183] [2022-11-18 18:26:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:45,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:45,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:45,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682355183] [2022-11-18 18:26:45,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682355183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:45,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374154212] [2022-11-18 18:26:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:45,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:45,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:45,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:45,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:26:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:26:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:45,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:45,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374154212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:45,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:45,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:26:45,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208599071] [2022-11-18 18:26:45,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:45,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:26:45,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:45,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:26:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:26:45,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-11-18 18:26:45,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 217 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:45,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:45,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-11-18 18:26:45,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:46,094 INFO L130 PetriNetUnfolder]: 0/298 cut-off events. [2022-11-18 18:26:46,094 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 18:26:46,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 298 events. 0/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 752 event pairs, 0 based on Foata normal form. 2/300 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-18 18:26:46,095 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 16 selfloop transitions, 9 changer transitions 0/227 dead transitions. [2022-11-18 18:26:46,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 546 flow [2022-11-18 18:26:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:26:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:26:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1944 transitions. [2022-11-18 18:26:46,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8059701492537313 [2022-11-18 18:26:46,102 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1944 transitions. [2022-11-18 18:26:46,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1944 transitions. [2022-11-18 18:26:46,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:46,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1944 transitions. [2022-11-18 18:26:46,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.0) internal successors, (1944), 9 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:46,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:46,115 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:46,115 INFO L175 Difference]: Start difference. First operand has 233 places, 217 transitions, 474 flow. Second operand 9 states and 1944 transitions. [2022-11-18 18:26:46,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 546 flow [2022-11-18 18:26:46,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 227 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:46,120 INFO L231 Difference]: Finished difference. Result has 243 places, 223 transitions, 522 flow [2022-11-18 18:26:46,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=522, PETRI_PLACES=243, PETRI_TRANSITIONS=223} [2022-11-18 18:26:46,121 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 2 predicate places. [2022-11-18 18:26:46,121 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 223 transitions, 522 flow [2022-11-18 18:26:46,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:46,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:46,123 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:46,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:46,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 18:26:46,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1964061798, now seen corresponding path program 1 times [2022-11-18 18:26:46,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:46,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299418546] [2022-11-18 18:26:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:46,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:46,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:46,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299418546] [2022-11-18 18:26:46,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299418546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:46,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951780418] [2022-11-18 18:26:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:46,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:46,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:46,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:46,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:26:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:46,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:26:46,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:46,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:46,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951780418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:46,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:46,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:26:46,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639402304] [2022-11-18 18:26:46,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:26:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:46,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:26:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:26:46,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-11-18 18:26:46,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 223 transitions, 522 flow. Second operand has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:46,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:46,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-11-18 18:26:46,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:47,120 INFO L130 PetriNetUnfolder]: 0/254 cut-off events. [2022-11-18 18:26:47,121 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-18 18:26:47,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-18 18:26:47,122 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-11-18 18:26:47,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 232 transitions, 660 flow [2022-11-18 18:26:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:26:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:26:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4517 transitions. [2022-11-18 18:26:47,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025941719971571 [2022-11-18 18:26:47,132 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4517 transitions. [2022-11-18 18:26:47,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4517 transitions. [2022-11-18 18:26:47,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:47,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4517 transitions. [2022-11-18 18:26:47,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 215.0952380952381) internal successors, (4517), 21 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,162 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,162 INFO L175 Difference]: Start difference. First operand has 243 places, 223 transitions, 522 flow. Second operand 21 states and 4517 transitions. [2022-11-18 18:26:47,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 232 transitions, 660 flow [2022-11-18 18:26:47,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-18 18:26:47,168 INFO L231 Difference]: Finished difference. Result has 248 places, 221 transitions, 558 flow [2022-11-18 18:26:47,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=248, PETRI_TRANSITIONS=221} [2022-11-18 18:26:47,170 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 7 predicate places. [2022-11-18 18:26:47,170 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 221 transitions, 558 flow [2022-11-18 18:26:47,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,172 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:47,172 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:47,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:47,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 18:26:47,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1487942330, now seen corresponding path program 1 times [2022-11-18 18:26:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:47,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705428688] [2022-11-18 18:26:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:47,424 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:47,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:47,496 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:47,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:47,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:47,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-18 18:26:47,497 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 18:26:47,498 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:47,498 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-18 18:26:47,536 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:47,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 301 transitions, 679 flow [2022-11-18 18:26:47,654 INFO L130 PetriNetUnfolder]: 74/548 cut-off events. [2022-11-18 18:26:47,655 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-18 18:26:47,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 548 events. 74/548 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1838 event pairs, 0 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 505. Up to 16 conditions per place. [2022-11-18 18:26:47,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 301 transitions, 679 flow [2022-11-18 18:26:47,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 301 transitions, 679 flow [2022-11-18 18:26:47,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:47,678 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:47,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:47,684 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:47,684 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:47,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:47,685 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:47,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:47,685 INFO L85 PathProgramCache]: Analyzing trace with hash 680473626, now seen corresponding path program 1 times [2022-11-18 18:26:47,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:47,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454093784] [2022-11-18 18:26:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:47,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:47,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454093784] [2022-11-18 18:26:47,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454093784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:47,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:47,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147078027] [2022-11-18 18:26:47,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:47,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:47,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:47,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 301 [2022-11-18 18:26:47,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 301 transitions, 679 flow. Second operand has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:47,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 301 [2022-11-18 18:26:47,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:47,823 INFO L130 PetriNetUnfolder]: 0/466 cut-off events. [2022-11-18 18:26:47,823 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-18 18:26:47,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 466 events. 0/466 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1641 event pairs, 0 based on Foata normal form. 166/616 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-11-18 18:26:47,825 INFO L137 encePairwiseOnDemand]: 255/301 looper letters, 7 selfloop transitions, 0 changer transitions 11/254 dead transitions. [2022-11-18 18:26:47,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 599 flow [2022-11-18 18:26:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 547 transitions. [2022-11-18 18:26:47,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9086378737541528 [2022-11-18 18:26:47,827 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 547 transitions. [2022-11-18 18:26:47,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 547 transitions. [2022-11-18 18:26:47,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:47,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 547 transitions. [2022-11-18 18:26:47,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,830 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,831 INFO L175 Difference]: Start difference. First operand has 270 places, 301 transitions, 679 flow. Second operand 2 states and 547 transitions. [2022-11-18 18:26:47,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 599 flow [2022-11-18 18:26:47,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 254 transitions, 557 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:47,836 INFO L231 Difference]: Finished difference. Result has 270 places, 243 transitions, 521 flow [2022-11-18 18:26:47,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=521, PETRI_PLACES=270, PETRI_TRANSITIONS=243} [2022-11-18 18:26:47,837 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 0 predicate places. [2022-11-18 18:26:47,837 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 243 transitions, 521 flow [2022-11-18 18:26:47,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:47,838 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:47,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-18 18:26:47,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1116477733, now seen corresponding path program 1 times [2022-11-18 18:26:47,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:47,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719872382] [2022-11-18 18:26:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:47,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:47,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719872382] [2022-11-18 18:26:47,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719872382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:47,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:47,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:47,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425611614] [2022-11-18 18:26:47,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:47,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:47,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:47,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:47,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 301 [2022-11-18 18:26:47,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 243 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:47,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:47,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 301 [2022-11-18 18:26:47,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:48,005 INFO L130 PetriNetUnfolder]: 0/367 cut-off events. [2022-11-18 18:26:48,006 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 18:26:48,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 367 events. 0/367 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1055 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-18 18:26:48,007 INFO L137 encePairwiseOnDemand]: 298/301 looper letters, 16 selfloop transitions, 2 changer transitions 0/247 dead transitions. [2022-11-18 18:26:48,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 247 transitions, 565 flow [2022-11-18 18:26:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2022-11-18 18:26:48,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8183831672203765 [2022-11-18 18:26:48,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2022-11-18 18:26:48,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2022-11-18 18:26:48,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:48,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2022-11-18 18:26:48,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,014 INFO L175 Difference]: Start difference. First operand has 270 places, 243 transitions, 521 flow. Second operand 3 states and 739 transitions. [2022-11-18 18:26:48,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 247 transitions, 565 flow [2022-11-18 18:26:48,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 247 transitions, 565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:48,019 INFO L231 Difference]: Finished difference. Result has 262 places, 244 transitions, 533 flow [2022-11-18 18:26:48,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=533, PETRI_PLACES=262, PETRI_TRANSITIONS=244} [2022-11-18 18:26:48,020 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, -8 predicate places. [2022-11-18 18:26:48,020 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 244 transitions, 533 flow [2022-11-18 18:26:48,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:48,021 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:48,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-18 18:26:48,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1352747695, now seen corresponding path program 1 times [2022-11-18 18:26:48,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:48,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144230140] [2022-11-18 18:26:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:48,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:48,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144230140] [2022-11-18 18:26:48,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144230140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155746786] [2022-11-18 18:26:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:48,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:48,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:48,087 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:48,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:26:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:48,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:26:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:48,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:48,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155746786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:48,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:48,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:26:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12253669] [2022-11-18 18:26:48,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:48,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:26:48,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:48,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:26:48,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:26:48,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-11-18 18:26:48,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 244 transitions, 533 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:48,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-11-18 18:26:48,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:48,495 INFO L130 PetriNetUnfolder]: 0/345 cut-off events. [2022-11-18 18:26:48,496 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-18 18:26:48,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 345 events. 0/345 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 922 event pairs, 0 based on Foata normal form. 2/347 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-18 18:26:48,497 INFO L137 encePairwiseOnDemand]: 295/301 looper letters, 17 selfloop transitions, 9 changer transitions 0/254 dead transitions. [2022-11-18 18:26:48,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 607 flow [2022-11-18 18:26:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:26:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:26:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2179 transitions. [2022-11-18 18:26:48,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8043558508674787 [2022-11-18 18:26:48,501 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2179 transitions. [2022-11-18 18:26:48,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2179 transitions. [2022-11-18 18:26:48,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:48,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2179 transitions. [2022-11-18 18:26:48,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 242.11111111111111) internal successors, (2179), 9 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,511 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,511 INFO L175 Difference]: Start difference. First operand has 262 places, 244 transitions, 533 flow. Second operand 9 states and 2179 transitions. [2022-11-18 18:26:48,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 607 flow [2022-11-18 18:26:48,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 254 transitions, 605 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:48,517 INFO L231 Difference]: Finished difference. Result has 272 places, 250 transitions, 581 flow [2022-11-18 18:26:48,517 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=581, PETRI_PLACES=272, PETRI_TRANSITIONS=250} [2022-11-18 18:26:48,518 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 2 predicate places. [2022-11-18 18:26:48,518 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 250 transitions, 581 flow [2022-11-18 18:26:48,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:48,519 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:48,519 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:48,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:48,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 18:26:48,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash -117378022, now seen corresponding path program 1 times [2022-11-18 18:26:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:48,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834967496] [2022-11-18 18:26:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:48,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:48,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:48,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834967496] [2022-11-18 18:26:48,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834967496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:48,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801213556] [2022-11-18 18:26:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:48,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:48,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:48,892 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:48,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:26:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:49,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:26:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:49,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:49,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801213556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:49,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:49,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:26:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612360852] [2022-11-18 18:26:49,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:49,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:26:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:26:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:26:49,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-11-18 18:26:49,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 250 transitions, 581 flow. Second operand has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:49,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:49,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-11-18 18:26:49,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:49,605 INFO L130 PetriNetUnfolder]: 0/301 cut-off events. [2022-11-18 18:26:49,606 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-18 18:26:49,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 301 events. 0/301 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 634 event pairs, 0 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-18 18:26:49,607 INFO L137 encePairwiseOnDemand]: 295/301 looper letters, 25 selfloop transitions, 21 changer transitions 0/274 dead transitions. [2022-11-18 18:26:49,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 274 transitions, 781 flow [2022-11-18 18:26:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:26:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:26:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5069 transitions. [2022-11-18 18:26:49,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8019300743553235 [2022-11-18 18:26:49,616 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5069 transitions. [2022-11-18 18:26:49,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5069 transitions. [2022-11-18 18:26:49,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:49,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5069 transitions. [2022-11-18 18:26:49,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 241.38095238095238) internal successors, (5069), 21 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:49,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:49,641 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:49,641 INFO L175 Difference]: Start difference. First operand has 272 places, 250 transitions, 581 flow. Second operand 21 states and 5069 transitions. [2022-11-18 18:26:49,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 274 transitions, 781 flow [2022-11-18 18:26:49,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 274 transitions, 767 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:49,648 INFO L231 Difference]: Finished difference. Result has 296 places, 263 transitions, 705 flow [2022-11-18 18:26:49,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=705, PETRI_PLACES=296, PETRI_TRANSITIONS=263} [2022-11-18 18:26:49,649 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 26 predicate places. [2022-11-18 18:26:49,649 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 263 transitions, 705 flow [2022-11-18 18:26:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:49,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:49,652 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:49,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:49,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1506019884, now seen corresponding path program 1 times [2022-11-18 18:26:49,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:49,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186493076] [2022-11-18 18:26:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:49,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:49,939 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:49,939 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:49,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:49,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:49,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-18 18:26:49,940 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 18:26:49,942 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:49,942 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-18 18:26:49,977 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:49,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 299 places, 334 transitions, 764 flow [2022-11-18 18:26:50,125 INFO L130 PetriNetUnfolder]: 84/617 cut-off events. [2022-11-18 18:26:50,125 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-18 18:26:50,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 617 events. 84/617 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2097 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 582. Up to 18 conditions per place. [2022-11-18 18:26:50,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 334 transitions, 764 flow [2022-11-18 18:26:50,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 334 transitions, 764 flow [2022-11-18 18:26:50,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:50,141 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:50,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:50,147 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:50,147 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:50,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:50,148 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:50,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 357087898, now seen corresponding path program 1 times [2022-11-18 18:26:50,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:50,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094763778] [2022-11-18 18:26:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:50,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:50,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094763778] [2022-11-18 18:26:50,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094763778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:50,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:50,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320299644] [2022-11-18 18:26:50,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:50,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:50,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 334 [2022-11-18 18:26:50,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 334 transitions, 764 flow. Second operand has 2 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:50,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 334 [2022-11-18 18:26:50,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:50,310 INFO L130 PetriNetUnfolder]: 0/524 cut-off events. [2022-11-18 18:26:50,311 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-11-18 18:26:50,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 524 events. 0/524 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1888 event pairs, 0 based on Foata normal form. 212/718 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-18 18:26:50,312 INFO L137 encePairwiseOnDemand]: 282/334 looper letters, 8 selfloop transitions, 0 changer transitions 11/281 dead transitions. [2022-11-18 18:26:50,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 281 transitions, 674 flow [2022-11-18 18:26:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 606 transitions. [2022-11-18 18:26:50,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.907185628742515 [2022-11-18 18:26:50,315 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 606 transitions. [2022-11-18 18:26:50,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 606 transitions. [2022-11-18 18:26:50,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:50,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 606 transitions. [2022-11-18 18:26:50,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 303.0) internal successors, (606), 2 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,319 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,319 INFO L175 Difference]: Start difference. First operand has 299 places, 334 transitions, 764 flow. Second operand 2 states and 606 transitions. [2022-11-18 18:26:50,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 281 transitions, 674 flow [2022-11-18 18:26:50,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 281 transitions, 618 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:50,324 INFO L231 Difference]: Finished difference. Result has 299 places, 270 transitions, 580 flow [2022-11-18 18:26:50,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=580, PETRI_PLACES=299, PETRI_TRANSITIONS=270} [2022-11-18 18:26:50,325 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 0 predicate places. [2022-11-18 18:26:50,326 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 270 transitions, 580 flow [2022-11-18 18:26:50,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:50,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-18 18:26:50,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1439863461, now seen corresponding path program 1 times [2022-11-18 18:26:50,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:50,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115145164] [2022-11-18 18:26:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:50,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:50,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115145164] [2022-11-18 18:26:50,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115145164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:50,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:50,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:50,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432835155] [2022-11-18 18:26:50,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:50,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:50,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:50,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:50,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:50,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 334 [2022-11-18 18:26:50,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 270 transitions, 580 flow. Second operand has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:50,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 334 [2022-11-18 18:26:50,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:50,490 INFO L130 PetriNetUnfolder]: 0/414 cut-off events. [2022-11-18 18:26:50,490 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:26:50,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 414 events. 0/414 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1228 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-18 18:26:50,492 INFO L137 encePairwiseOnDemand]: 331/334 looper letters, 17 selfloop transitions, 2 changer transitions 0/274 dead transitions. [2022-11-18 18:26:50,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 274 transitions, 626 flow [2022-11-18 18:26:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2022-11-18 18:26:50,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8163672654690619 [2022-11-18 18:26:50,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2022-11-18 18:26:50,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2022-11-18 18:26:50,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:50,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2022-11-18 18:26:50,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,498 INFO L175 Difference]: Start difference. First operand has 299 places, 270 transitions, 580 flow. Second operand 3 states and 818 transitions. [2022-11-18 18:26:50,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 274 transitions, 626 flow [2022-11-18 18:26:50,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 274 transitions, 626 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:50,504 INFO L231 Difference]: Finished difference. Result has 291 places, 271 transitions, 592 flow [2022-11-18 18:26:50,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=291, PETRI_TRANSITIONS=271} [2022-11-18 18:26:50,505 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -8 predicate places. [2022-11-18 18:26:50,505 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 271 transitions, 592 flow [2022-11-18 18:26:50,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:50,506 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:50,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-18 18:26:50,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1451826673, now seen corresponding path program 1 times [2022-11-18 18:26:50,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:50,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891364520] [2022-11-18 18:26:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:50,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891364520] [2022-11-18 18:26:50,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891364520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608638973] [2022-11-18 18:26:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:50,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:50,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:50,583 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:50,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:26:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:26:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:50,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:50,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608638973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:50,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:50,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:26:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664876129] [2022-11-18 18:26:50,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:50,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:26:50,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:26:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:26:50,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-18 18:26:50,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 271 transitions, 592 flow. Second operand has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:50,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:50,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-18 18:26:50,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:51,001 INFO L130 PetriNetUnfolder]: 0/392 cut-off events. [2022-11-18 18:26:51,002 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-18 18:26:51,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 392 events. 0/392 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1092 event pairs, 0 based on Foata normal form. 2/394 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-18 18:26:51,003 INFO L137 encePairwiseOnDemand]: 328/334 looper letters, 18 selfloop transitions, 9 changer transitions 0/281 dead transitions. [2022-11-18 18:26:51,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 281 transitions, 668 flow [2022-11-18 18:26:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:26:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:26:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2414 transitions. [2022-11-18 18:26:51,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8030605455755156 [2022-11-18 18:26:51,007 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2414 transitions. [2022-11-18 18:26:51,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2414 transitions. [2022-11-18 18:26:51,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:51,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2414 transitions. [2022-11-18 18:26:51,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 268.22222222222223) internal successors, (2414), 9 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:51,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:51,019 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:51,019 INFO L175 Difference]: Start difference. First operand has 291 places, 271 transitions, 592 flow. Second operand 9 states and 2414 transitions. [2022-11-18 18:26:51,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 281 transitions, 668 flow [2022-11-18 18:26:51,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 281 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:51,025 INFO L231 Difference]: Finished difference. Result has 301 places, 277 transitions, 640 flow [2022-11-18 18:26:51,025 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=640, PETRI_PLACES=301, PETRI_TRANSITIONS=277} [2022-11-18 18:26:51,026 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 2 predicate places. [2022-11-18 18:26:51,026 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 277 transitions, 640 flow [2022-11-18 18:26:51,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:51,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:51,027 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:51,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:51,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-18 18:26:51,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1182407366, now seen corresponding path program 1 times [2022-11-18 18:26:51,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:51,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673410299] [2022-11-18 18:26:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:51,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:51,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:51,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673410299] [2022-11-18 18:26:51,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673410299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640236759] [2022-11-18 18:26:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:51,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:51,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:51,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:51,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:26:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:26:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:51,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:51,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640236759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:51,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:51,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:26:51,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406458999] [2022-11-18 18:26:51,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:51,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:26:51,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:26:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:26:51,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-18 18:26:51,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 277 transitions, 640 flow. Second operand has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:51,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:51,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-18 18:26:51,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:52,113 INFO L130 PetriNetUnfolder]: 0/348 cut-off events. [2022-11-18 18:26:52,114 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-18 18:26:52,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 348 events. 0/348 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 804 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-18 18:26:52,115 INFO L137 encePairwiseOnDemand]: 328/334 looper letters, 26 selfloop transitions, 21 changer transitions 0/301 dead transitions. [2022-11-18 18:26:52,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 301 transitions, 842 flow [2022-11-18 18:26:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:26:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:26:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5616 transitions. [2022-11-18 18:26:52,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8006843455945253 [2022-11-18 18:26:52,124 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5616 transitions. [2022-11-18 18:26:52,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5616 transitions. [2022-11-18 18:26:52,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:52,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5616 transitions. [2022-11-18 18:26:52,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 267.42857142857144) internal successors, (5616), 21 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:52,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:52,147 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:52,148 INFO L175 Difference]: Start difference. First operand has 301 places, 277 transitions, 640 flow. Second operand 21 states and 5616 transitions. [2022-11-18 18:26:52,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 301 transitions, 842 flow [2022-11-18 18:26:52,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 301 transitions, 828 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:52,154 INFO L231 Difference]: Finished difference. Result has 325 places, 290 transitions, 764 flow [2022-11-18 18:26:52,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=764, PETRI_PLACES=325, PETRI_TRANSITIONS=290} [2022-11-18 18:26:52,159 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 26 predicate places. [2022-11-18 18:26:52,159 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 290 transitions, 764 flow [2022-11-18 18:26:52,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:52,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:52,161 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:52,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:52,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:52,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1666027420, now seen corresponding path program 1 times [2022-11-18 18:26:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:52,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247345032] [2022-11-18 18:26:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:52,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:52,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247345032] [2022-11-18 18:26:52,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247345032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:52,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029216676] [2022-11-18 18:26:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:52,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:52,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:52,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:52,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:26:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:26:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:53,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:53,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029216676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:53,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:53,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:26:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135304332] [2022-11-18 18:26:53,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:53,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:26:53,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:26:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:26:53,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-18 18:26:53,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 290 transitions, 764 flow. Second operand has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:53,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:53,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-18 18:26:53,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:53,988 INFO L130 PetriNetUnfolder]: 0/326 cut-off events. [2022-11-18 18:26:53,988 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-18 18:26:53,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-18 18:26:53,989 INFO L137 encePairwiseOnDemand]: 329/334 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-11-18 18:26:53,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 296 transitions, 912 flow [2022-11-18 18:26:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 18:26:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 18:26:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7209 transitions. [2022-11-18 18:26:53,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7994011976047904 [2022-11-18 18:26:53,999 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7209 transitions. [2022-11-18 18:26:54,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7209 transitions. [2022-11-18 18:26:54,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:54,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7209 transitions. [2022-11-18 18:26:54,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 267.0) internal successors, (7209), 27 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,030 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,031 INFO L175 Difference]: Start difference. First operand has 325 places, 290 transitions, 764 flow. Second operand 27 states and 7209 transitions. [2022-11-18 18:26:54,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 296 transitions, 912 flow [2022-11-18 18:26:54,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-18 18:26:54,038 INFO L231 Difference]: Finished difference. Result has 327 places, 282 transitions, 751 flow [2022-11-18 18:26:54,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=327, PETRI_TRANSITIONS=282} [2022-11-18 18:26:54,040 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 28 predicate places. [2022-11-18 18:26:54,040 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 282 transitions, 751 flow [2022-11-18 18:26:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:54,043 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:54,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:54,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 18:26:54,249 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1480341263, now seen corresponding path program 1 times [2022-11-18 18:26:54,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:54,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678060096] [2022-11-18 18:26:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:54,280 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:54,320 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:54,321 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:54,322 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:54,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:54,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-18 18:26:54,322 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:26:54,324 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:54,324 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-18 18:26:54,366 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:54,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 367 transitions, 851 flow [2022-11-18 18:26:54,544 INFO L130 PetriNetUnfolder]: 94/686 cut-off events. [2022-11-18 18:26:54,544 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-18 18:26:54,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 686 events. 94/686 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2344 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 660. Up to 20 conditions per place. [2022-11-18 18:26:54,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 367 transitions, 851 flow [2022-11-18 18:26:54,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 328 places, 367 transitions, 851 flow [2022-11-18 18:26:54,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:54,571 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:54,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:54,578 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:54,578 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:54,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:54,578 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:54,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1837112358, now seen corresponding path program 1 times [2022-11-18 18:26:54,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:54,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830220984] [2022-11-18 18:26:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:54,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:54,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:54,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830220984] [2022-11-18 18:26:54,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830220984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:54,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:54,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:54,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259448385] [2022-11-18 18:26:54,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:54,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:54,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:54,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 367 [2022-11-18 18:26:54,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 367 transitions, 851 flow. Second operand has 2 states, 2 states have (on average 299.5) internal successors, (599), 2 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:54,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 367 [2022-11-18 18:26:54,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:54,820 INFO L130 PetriNetUnfolder]: 0/582 cut-off events. [2022-11-18 18:26:54,820 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2022-11-18 18:26:54,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 582 events. 0/582 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2145 event pairs, 0 based on Foata normal form. 264/826 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2022-11-18 18:26:54,823 INFO L137 encePairwiseOnDemand]: 309/367 looper letters, 9 selfloop transitions, 0 changer transitions 11/308 dead transitions. [2022-11-18 18:26:54,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 308 transitions, 751 flow [2022-11-18 18:26:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 665 transitions. [2022-11-18 18:26:54,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9059945504087193 [2022-11-18 18:26:54,826 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 665 transitions. [2022-11-18 18:26:54,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 665 transitions. [2022-11-18 18:26:54,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:54,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 665 transitions. [2022-11-18 18:26:54,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 332.5) internal successors, (665), 2 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,831 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,832 INFO L175 Difference]: Start difference. First operand has 328 places, 367 transitions, 851 flow. Second operand 2 states and 665 transitions. [2022-11-18 18:26:54,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 308 transitions, 751 flow [2022-11-18 18:26:54,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 308 transitions, 679 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:54,840 INFO L231 Difference]: Finished difference. Result has 328 places, 297 transitions, 639 flow [2022-11-18 18:26:54,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=639, PETRI_PLACES=328, PETRI_TRANSITIONS=297} [2022-11-18 18:26:54,842 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, 0 predicate places. [2022-11-18 18:26:54,842 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 297 transitions, 639 flow [2022-11-18 18:26:54,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 299.5) internal successors, (599), 2 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:54,843 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:54,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-18 18:26:54,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:54,845 INFO L85 PathProgramCache]: Analyzing trace with hash 660903579, now seen corresponding path program 1 times [2022-11-18 18:26:54,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:54,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455046658] [2022-11-18 18:26:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:54,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:54,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:54,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455046658] [2022-11-18 18:26:54,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455046658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:54,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:54,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:54,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776686176] [2022-11-18 18:26:54,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:54,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:54,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:54,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:54,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 367 [2022-11-18 18:26:54,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 297 transitions, 639 flow. Second operand has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:54,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:54,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 367 [2022-11-18 18:26:54,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:55,142 INFO L130 PetriNetUnfolder]: 0/461 cut-off events. [2022-11-18 18:26:55,142 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 18:26:55,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 461 events. 0/461 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1397 event pairs, 0 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-18 18:26:55,145 INFO L137 encePairwiseOnDemand]: 364/367 looper letters, 18 selfloop transitions, 2 changer transitions 0/301 dead transitions. [2022-11-18 18:26:55,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 301 transitions, 687 flow [2022-11-18 18:26:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:26:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:26:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 897 transitions. [2022-11-18 18:26:55,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8147138964577657 [2022-11-18 18:26:55,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 897 transitions. [2022-11-18 18:26:55,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 897 transitions. [2022-11-18 18:26:55,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:55,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 897 transitions. [2022-11-18 18:26:55,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,158 INFO L175 Difference]: Start difference. First operand has 328 places, 297 transitions, 639 flow. Second operand 3 states and 897 transitions. [2022-11-18 18:26:55,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 301 transitions, 687 flow [2022-11-18 18:26:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 301 transitions, 687 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:55,166 INFO L231 Difference]: Finished difference. Result has 320 places, 298 transitions, 651 flow [2022-11-18 18:26:55,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=651, PETRI_PLACES=320, PETRI_TRANSITIONS=298} [2022-11-18 18:26:55,169 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, -8 predicate places. [2022-11-18 18:26:55,169 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 298 transitions, 651 flow [2022-11-18 18:26:55,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:55,170 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:55,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-18 18:26:55,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1230794959, now seen corresponding path program 1 times [2022-11-18 18:26:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:55,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529519229] [2022-11-18 18:26:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:55,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529519229] [2022-11-18 18:26:55,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529519229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016856399] [2022-11-18 18:26:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:55,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:55,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:55,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:26:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:26:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:55,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:55,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016856399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:55,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:55,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:26:55,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969233988] [2022-11-18 18:26:55,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:55,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:26:55,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:26:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:26:55,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-18 18:26:55,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 298 transitions, 651 flow. Second operand has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:55,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-18 18:26:55,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:55,842 INFO L130 PetriNetUnfolder]: 0/439 cut-off events. [2022-11-18 18:26:55,843 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-18 18:26:55,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 439 events. 0/439 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1262 event pairs, 0 based on Foata normal form. 2/441 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-18 18:26:55,844 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 19 selfloop transitions, 9 changer transitions 0/308 dead transitions. [2022-11-18 18:26:55,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 308 transitions, 729 flow [2022-11-18 18:26:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:26:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:26:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2649 transitions. [2022-11-18 18:26:55,850 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8019981834695731 [2022-11-18 18:26:55,850 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2649 transitions. [2022-11-18 18:26:55,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2649 transitions. [2022-11-18 18:26:55,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:55,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2649 transitions. [2022-11-18 18:26:55,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 294.3333333333333) internal successors, (2649), 9 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,860 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,861 INFO L175 Difference]: Start difference. First operand has 320 places, 298 transitions, 651 flow. Second operand 9 states and 2649 transitions. [2022-11-18 18:26:55,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 308 transitions, 729 flow [2022-11-18 18:26:55,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 308 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:55,866 INFO L231 Difference]: Finished difference. Result has 330 places, 304 transitions, 699 flow [2022-11-18 18:26:55,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=699, PETRI_PLACES=330, PETRI_TRANSITIONS=304} [2022-11-18 18:26:55,867 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, 2 predicate places. [2022-11-18 18:26:55,868 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 304 transitions, 699 flow [2022-11-18 18:26:55,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:55,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:55,869 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:55,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:56,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 18:26:56,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash -864182534, now seen corresponding path program 1 times [2022-11-18 18:26:56,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:56,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004061214] [2022-11-18 18:26:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:56,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:56,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004061214] [2022-11-18 18:26:56,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004061214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:56,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398506731] [2022-11-18 18:26:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:56,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:56,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:56,202 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:56,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:26:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:56,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:26:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:56,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:56,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398506731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:56,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:56,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:26:56,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233006335] [2022-11-18 18:26:56,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:56,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:26:56,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:56,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:26:56,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:26:56,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-18 18:26:56,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 304 transitions, 699 flow. Second operand has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:56,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:56,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-18 18:26:56,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:56,969 INFO L130 PetriNetUnfolder]: 0/395 cut-off events. [2022-11-18 18:26:56,969 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-18 18:26:56,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 395 events. 0/395 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 974 event pairs, 0 based on Foata normal form. 4/399 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-18 18:26:56,971 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 27 selfloop transitions, 21 changer transitions 0/328 dead transitions. [2022-11-18 18:26:56,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 328 transitions, 903 flow [2022-11-18 18:26:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:26:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:26:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6163 transitions. [2022-11-18 18:26:56,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7996626443492929 [2022-11-18 18:26:56,980 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6163 transitions. [2022-11-18 18:26:56,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6163 transitions. [2022-11-18 18:26:56,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:56,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6163 transitions. [2022-11-18 18:26:56,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 293.4761904761905) internal successors, (6163), 21 states have internal predecessors, (6163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:57,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:57,003 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:57,003 INFO L175 Difference]: Start difference. First operand has 330 places, 304 transitions, 699 flow. Second operand 21 states and 6163 transitions. [2022-11-18 18:26:57,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 328 transitions, 903 flow [2022-11-18 18:26:57,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 328 transitions, 889 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:26:57,010 INFO L231 Difference]: Finished difference. Result has 354 places, 317 transitions, 823 flow [2022-11-18 18:26:57,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=823, PETRI_PLACES=354, PETRI_TRANSITIONS=317} [2022-11-18 18:26:57,011 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, 26 predicate places. [2022-11-18 18:26:57,011 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 317 transitions, 823 flow [2022-11-18 18:26:57,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:57,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:57,012 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:57,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:57,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-18 18:26:57,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1109450916, now seen corresponding path program 1 times [2022-11-18 18:26:57,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:57,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177754912] [2022-11-18 18:26:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:57,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:57,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:57,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177754912] [2022-11-18 18:26:57,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177754912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:26:57,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592018155] [2022-11-18 18:26:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:57,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:26:57,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:26:57,556 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:26:57,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:26:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:57,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:26:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:26:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:57,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:26:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:58,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592018155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:26:58,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:26:58,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:26:58,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371811326] [2022-11-18 18:26:58,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:26:58,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:26:58,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:26:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:26:58,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-18 18:26:58,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 317 transitions, 823 flow. Second operand has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:58,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:58,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-18 18:26:58,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:58,829 INFO L130 PetriNetUnfolder]: 0/362 cut-off events. [2022-11-18 18:26:58,829 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-18 18:26:58,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-18 18:26:58,831 INFO L137 encePairwiseOnDemand]: 362/367 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-11-18 18:26:58,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 328 transitions, 1017 flow [2022-11-18 18:26:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 18:26:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 18:26:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8791 transitions. [2022-11-18 18:26:58,855 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.798455949137148 [2022-11-18 18:26:58,855 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8791 transitions. [2022-11-18 18:26:58,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8791 transitions. [2022-11-18 18:26:58,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:58,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8791 transitions. [2022-11-18 18:26:58,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 293.03333333333336) internal successors, (8791), 30 states have internal predecessors, (8791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:58,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:58,895 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:58,895 INFO L175 Difference]: Start difference. First operand has 354 places, 317 transitions, 823 flow. Second operand 30 states and 8791 transitions. [2022-11-18 18:26:58,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 328 transitions, 1017 flow [2022-11-18 18:26:58,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-18 18:26:58,905 INFO L231 Difference]: Finished difference. Result has 359 places, 312 transitions, 834 flow [2022-11-18 18:26:58,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=359, PETRI_TRANSITIONS=312} [2022-11-18 18:26:58,906 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, 31 predicate places. [2022-11-18 18:26:58,906 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 312 transitions, 834 flow [2022-11-18 18:26:58,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:58,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:58,908 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:58,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:26:59,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-18 18:26:59,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:59,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2129596171, now seen corresponding path program 1 times [2022-11-18 18:26:59,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:59,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437532819] [2022-11-18 18:26:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:59,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:59,153 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:26:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:26:59,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:26:59,196 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:26:59,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:26:59,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:26:59,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-18 18:26:59,197 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:26:59,198 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:26:59,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-18 18:26:59,246 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:26:59,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 357 places, 400 transitions, 940 flow [2022-11-18 18:26:59,465 INFO L130 PetriNetUnfolder]: 104/755 cut-off events. [2022-11-18 18:26:59,466 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-18 18:26:59,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 755 events. 104/755 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2599 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 739. Up to 22 conditions per place. [2022-11-18 18:26:59,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 400 transitions, 940 flow [2022-11-18 18:26:59,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 400 transitions, 940 flow [2022-11-18 18:26:59,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:26:59,494 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:26:59,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:26:59,500 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:26:59,500 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:26:59,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:59,500 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:59,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1607159846, now seen corresponding path program 1 times [2022-11-18 18:26:59,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:59,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351095644] [2022-11-18 18:26:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:59,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:59,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351095644] [2022-11-18 18:26:59,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351095644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:59,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:59,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:26:59,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060387355] [2022-11-18 18:26:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:59,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:26:59,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:26:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:26:59,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 400 [2022-11-18 18:26:59,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 400 transitions, 940 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:59,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:59,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 400 [2022-11-18 18:26:59,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:26:59,726 INFO L130 PetriNetUnfolder]: 0/640 cut-off events. [2022-11-18 18:26:59,726 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-11-18 18:26:59,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 640 events. 0/640 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2382 event pairs, 0 based on Foata normal form. 322/940 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-18 18:26:59,729 INFO L137 encePairwiseOnDemand]: 336/400 looper letters, 10 selfloop transitions, 0 changer transitions 11/335 dead transitions. [2022-11-18 18:26:59,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 830 flow [2022-11-18 18:26:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:26:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:26:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-11-18 18:26:59,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.905 [2022-11-18 18:26:59,733 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-11-18 18:26:59,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-11-18 18:26:59,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:26:59,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-11-18 18:26:59,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:59,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:59,737 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:59,737 INFO L175 Difference]: Start difference. First operand has 357 places, 400 transitions, 940 flow. Second operand 2 states and 724 transitions. [2022-11-18 18:26:59,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 830 flow [2022-11-18 18:26:59,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 335 transitions, 740 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-18 18:26:59,744 INFO L231 Difference]: Finished difference. Result has 357 places, 324 transitions, 698 flow [2022-11-18 18:26:59,745 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=357, PETRI_TRANSITIONS=324} [2022-11-18 18:26:59,745 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, 0 predicate places. [2022-11-18 18:26:59,745 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 324 transitions, 698 flow [2022-11-18 18:26:59,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:59,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:26:59,746 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:26:59,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-18 18:26:59,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:26:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:26:59,747 INFO L85 PathProgramCache]: Analyzing trace with hash 890856091, now seen corresponding path program 1 times [2022-11-18 18:26:59,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:26:59,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534647321] [2022-11-18 18:26:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:26:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:26:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:26:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:26:59,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:26:59,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534647321] [2022-11-18 18:26:59,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534647321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:26:59,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:26:59,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:26:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168158940] [2022-11-18 18:26:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:26:59,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:26:59,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:26:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:26:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:26:59,805 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 400 [2022-11-18 18:26:59,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 324 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:26:59,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:26:59,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 400 [2022-11-18 18:26:59,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:00,026 INFO L130 PetriNetUnfolder]: 0/508 cut-off events. [2022-11-18 18:27:00,027 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-18 18:27:00,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 508 events. 0/508 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1570 event pairs, 0 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-18 18:27:00,036 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 19 selfloop transitions, 2 changer transitions 0/328 dead transitions. [2022-11-18 18:27:00,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 328 transitions, 748 flow [2022-11-18 18:27:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2022-11-18 18:27:00,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2022-11-18 18:27:00,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2022-11-18 18:27:00,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2022-11-18 18:27:00,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:00,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2022-11-18 18:27:00,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,043 INFO L175 Difference]: Start difference. First operand has 357 places, 324 transitions, 698 flow. Second operand 3 states and 976 transitions. [2022-11-18 18:27:00,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 328 transitions, 748 flow [2022-11-18 18:27:00,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:00,049 INFO L231 Difference]: Finished difference. Result has 349 places, 325 transitions, 710 flow [2022-11-18 18:27:00,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=349, PETRI_TRANSITIONS=325} [2022-11-18 18:27:00,051 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, -8 predicate places. [2022-11-18 18:27:00,051 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 325 transitions, 710 flow [2022-11-18 18:27:00,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:00,053 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:00,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-18 18:27:00,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:00,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash 810677999, now seen corresponding path program 1 times [2022-11-18 18:27:00,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:00,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090778520] [2022-11-18 18:27:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:00,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:00,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:00,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090778520] [2022-11-18 18:27:00,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090778520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:00,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829373563] [2022-11-18 18:27:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:00,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:00,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:00,116 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:00,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:27:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:00,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:00,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829373563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:00,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:00,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:00,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973209735] [2022-11-18 18:27:00,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:00,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:00,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:00,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:00,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:00,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-18 18:27:00,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 325 transitions, 710 flow. Second operand has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:00,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-18 18:27:00,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:00,695 INFO L130 PetriNetUnfolder]: 0/486 cut-off events. [2022-11-18 18:27:00,695 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-18 18:27:00,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 486 events. 0/486 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1432 event pairs, 0 based on Foata normal form. 2/488 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-18 18:27:00,697 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 20 selfloop transitions, 9 changer transitions 0/335 dead transitions. [2022-11-18 18:27:00,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 790 flow [2022-11-18 18:27:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2884 transitions. [2022-11-18 18:27:00,702 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8011111111111111 [2022-11-18 18:27:00,703 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2884 transitions. [2022-11-18 18:27:00,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2884 transitions. [2022-11-18 18:27:00,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:00,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2884 transitions. [2022-11-18 18:27:00,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.44444444444446) internal successors, (2884), 9 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,714 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,714 INFO L175 Difference]: Start difference. First operand has 349 places, 325 transitions, 710 flow. Second operand 9 states and 2884 transitions. [2022-11-18 18:27:00,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 790 flow [2022-11-18 18:27:00,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 335 transitions, 788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:00,725 INFO L231 Difference]: Finished difference. Result has 359 places, 331 transitions, 758 flow [2022-11-18 18:27:00,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=758, PETRI_PLACES=359, PETRI_TRANSITIONS=331} [2022-11-18 18:27:00,726 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, 2 predicate places. [2022-11-18 18:27:00,726 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 331 transitions, 758 flow [2022-11-18 18:27:00,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:00,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:00,728 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:00,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:00,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:00,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash 837296474, now seen corresponding path program 1 times [2022-11-18 18:27:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:00,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980477605] [2022-11-18 18:27:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:01,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980477605] [2022-11-18 18:27:01,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980477605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686313950] [2022-11-18 18:27:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:01,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:01,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:01,057 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:01,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:27:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:01,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:01,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:01,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:01,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686313950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:01,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:01,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:01,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774914506] [2022-11-18 18:27:01,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:01,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:01,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:01,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-18 18:27:01,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 331 transitions, 758 flow. Second operand has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:01,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:01,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-18 18:27:01,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:01,933 INFO L130 PetriNetUnfolder]: 0/442 cut-off events. [2022-11-18 18:27:01,933 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-18 18:27:01,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 442 events. 0/442 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1144 event pairs, 0 based on Foata normal form. 4/446 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-18 18:27:01,935 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 28 selfloop transitions, 21 changer transitions 0/355 dead transitions. [2022-11-18 18:27:01,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 355 transitions, 964 flow [2022-11-18 18:27:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6710 transitions. [2022-11-18 18:27:01,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7988095238095239 [2022-11-18 18:27:01,944 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6710 transitions. [2022-11-18 18:27:01,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6710 transitions. [2022-11-18 18:27:01,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:01,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6710 transitions. [2022-11-18 18:27:01,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 319.5238095238095) internal successors, (6710), 21 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:01,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:01,967 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:01,968 INFO L175 Difference]: Start difference. First operand has 359 places, 331 transitions, 758 flow. Second operand 21 states and 6710 transitions. [2022-11-18 18:27:01,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 355 transitions, 964 flow [2022-11-18 18:27:01,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 355 transitions, 950 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:01,976 INFO L231 Difference]: Finished difference. Result has 383 places, 344 transitions, 882 flow [2022-11-18 18:27:01,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=882, PETRI_PLACES=383, PETRI_TRANSITIONS=344} [2022-11-18 18:27:01,978 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, 26 predicate places. [2022-11-18 18:27:01,978 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 344 transitions, 882 flow [2022-11-18 18:27:01,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:01,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:01,980 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:01,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:02,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1685699132, now seen corresponding path program 1 times [2022-11-18 18:27:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:02,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548847219] [2022-11-18 18:27:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:02,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:02,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548847219] [2022-11-18 18:27:02,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548847219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441546376] [2022-11-18 18:27:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:02,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:02,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:02,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:27:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:02,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:27:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:02,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:03,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441546376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:03,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:03,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:27:03,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636047921] [2022-11-18 18:27:03,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:03,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:27:03,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:03,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:27:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:27:03,307 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-18 18:27:03,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 344 transitions, 882 flow. Second operand has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:03,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:03,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-18 18:27:03,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:03,873 INFO L130 PetriNetUnfolder]: 0/398 cut-off events. [2022-11-18 18:27:03,873 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-18 18:27:03,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-18 18:27:03,874 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-11-18 18:27:03,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-11-18 18:27:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 18:27:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 18:27:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10529 transitions. [2022-11-18 18:27:03,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7976515151515151 [2022-11-18 18:27:03,887 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10529 transitions. [2022-11-18 18:27:03,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10529 transitions. [2022-11-18 18:27:03,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:03,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10529 transitions. [2022-11-18 18:27:03,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 319.06060606060606) internal successors, (10529), 33 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:03,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:03,922 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:03,923 INFO L175 Difference]: Start difference. First operand has 383 places, 344 transitions, 882 flow. Second operand 33 states and 10529 transitions. [2022-11-18 18:27:03,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-11-18 18:27:03,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-18 18:27:03,932 INFO L231 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-11-18 18:27:03,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-11-18 18:27:03,933 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, 34 predicate places. [2022-11-18 18:27:03,933 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-11-18 18:27:03,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:03,936 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:03,936 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:03,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-18 18:27:04,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash -111511960, now seen corresponding path program 1 times [2022-11-18 18:27:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:04,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288612640] [2022-11-18 18:27:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:04,178 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:27:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:04,239 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:27:04,240 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:27:04,240 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:27:04,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:27:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-18 18:27:04,241 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:27:04,241 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:27:04,242 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-18 18:27:04,283 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:27:04,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 433 transitions, 1031 flow [2022-11-18 18:27:04,498 INFO L130 PetriNetUnfolder]: 114/824 cut-off events. [2022-11-18 18:27:04,499 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-11-18 18:27:04,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 824 events. 114/824 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2854 event pairs, 0 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 819. Up to 24 conditions per place. [2022-11-18 18:27:04,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 433 transitions, 1031 flow [2022-11-18 18:27:04,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 433 transitions, 1031 flow [2022-11-18 18:27:04,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:27:04,525 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:27:04,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:27:04,551 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:27:04,551 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:27:04,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:04,551 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:04,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:04,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1046945434, now seen corresponding path program 1 times [2022-11-18 18:27:04,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:04,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529659277] [2022-11-18 18:27:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:04,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:04,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:04,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529659277] [2022-11-18 18:27:04,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529659277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:04,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:04,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:27:04,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509333545] [2022-11-18 18:27:04,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:04,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:27:04,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:27:04,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:27:04,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 433 [2022-11-18 18:27:04,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 433 transitions, 1031 flow. Second operand has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:04,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:04,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 433 [2022-11-18 18:27:04,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:04,889 INFO L130 PetriNetUnfolder]: 0/698 cut-off events. [2022-11-18 18:27:04,890 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-11-18 18:27:04,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 698 events. 0/698 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2629 event pairs, 0 based on Foata normal form. 386/1060 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-18 18:27:04,892 INFO L137 encePairwiseOnDemand]: 363/433 looper letters, 11 selfloop transitions, 0 changer transitions 11/362 dead transitions. [2022-11-18 18:27:04,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 362 transitions, 911 flow [2022-11-18 18:27:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:27:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:27:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 783 transitions. [2022-11-18 18:27:04,894 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9041570438799076 [2022-11-18 18:27:04,895 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 783 transitions. [2022-11-18 18:27:04,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 783 transitions. [2022-11-18 18:27:04,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:04,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 783 transitions. [2022-11-18 18:27:04,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 391.5) internal successors, (783), 2 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) [2022-11-18 18:27:04,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:04,898 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:04,899 INFO L175 Difference]: Start difference. First operand has 386 places, 433 transitions, 1031 flow. Second operand 2 states and 783 transitions. [2022-11-18 18:27:04,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 362 transitions, 911 flow [2022-11-18 18:27:04,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 362 transitions, 801 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:04,906 INFO L231 Difference]: Finished difference. Result has 386 places, 351 transitions, 757 flow [2022-11-18 18:27:04,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=757, PETRI_PLACES=386, PETRI_TRANSITIONS=351} [2022-11-18 18:27:04,908 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, 0 predicate places. [2022-11-18 18:27:04,908 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 351 transitions, 757 flow [2022-11-18 18:27:04,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:04,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:04,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:04,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-18 18:27:04,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:04,909 INFO L85 PathProgramCache]: Analyzing trace with hash -750005925, now seen corresponding path program 1 times [2022-11-18 18:27:04,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:04,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510984271] [2022-11-18 18:27:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:04,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:04,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:04,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510984271] [2022-11-18 18:27:04,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510984271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:04,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:04,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:27:04,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375279635] [2022-11-18 18:27:04,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:04,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:27:04,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:04,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:27:04,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:27:04,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 433 [2022-11-18 18:27:04,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 351 transitions, 757 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:04,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:04,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 433 [2022-11-18 18:27:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:05,132 INFO L130 PetriNetUnfolder]: 0/555 cut-off events. [2022-11-18 18:27:05,132 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-18 18:27:05,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 555 events. 0/555 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1738 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-18 18:27:05,134 INFO L137 encePairwiseOnDemand]: 430/433 looper letters, 20 selfloop transitions, 2 changer transitions 0/355 dead transitions. [2022-11-18 18:27:05,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 355 transitions, 809 flow [2022-11-18 18:27:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1055 transitions. [2022-11-18 18:27:05,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8121632024634334 [2022-11-18 18:27:05,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1055 transitions. [2022-11-18 18:27:05,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1055 transitions. [2022-11-18 18:27:05,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:05,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1055 transitions. [2022-11-18 18:27:05,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,141 INFO L175 Difference]: Start difference. First operand has 386 places, 351 transitions, 757 flow. Second operand 3 states and 1055 transitions. [2022-11-18 18:27:05,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 355 transitions, 809 flow [2022-11-18 18:27:05,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 355 transitions, 809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:05,148 INFO L231 Difference]: Finished difference. Result has 378 places, 352 transitions, 769 flow [2022-11-18 18:27:05,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=769, PETRI_PLACES=378, PETRI_TRANSITIONS=352} [2022-11-18 18:27:05,149 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, -8 predicate places. [2022-11-18 18:27:05,150 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 352 transitions, 769 flow [2022-11-18 18:27:05,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:05,150 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:05,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-18 18:27:05,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1582789743, now seen corresponding path program 1 times [2022-11-18 18:27:05,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:05,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643692786] [2022-11-18 18:27:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:05,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:05,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643692786] [2022-11-18 18:27:05,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643692786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:05,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660564830] [2022-11-18 18:27:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:05,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:05,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:05,209 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:05,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 18:27:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:05,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:05,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660564830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:05,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:05,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:05,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059055530] [2022-11-18 18:27:05,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:05,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:05,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:05,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:05,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:05,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-18 18:27:05,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 352 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:05,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-18 18:27:05,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:05,775 INFO L130 PetriNetUnfolder]: 0/533 cut-off events. [2022-11-18 18:27:05,776 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-18 18:27:05,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 533 events. 0/533 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1602 event pairs, 0 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-18 18:27:05,782 INFO L137 encePairwiseOnDemand]: 427/433 looper letters, 21 selfloop transitions, 9 changer transitions 0/362 dead transitions. [2022-11-18 18:27:05,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 362 transitions, 851 flow [2022-11-18 18:27:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3119 transitions. [2022-11-18 18:27:05,805 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.800359250705671 [2022-11-18 18:27:05,805 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3119 transitions. [2022-11-18 18:27:05,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3119 transitions. [2022-11-18 18:27:05,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:05,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3119 transitions. [2022-11-18 18:27:05,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.55555555555554) internal successors, (3119), 9 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,833 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,833 INFO L175 Difference]: Start difference. First operand has 378 places, 352 transitions, 769 flow. Second operand 9 states and 3119 transitions. [2022-11-18 18:27:05,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 362 transitions, 851 flow [2022-11-18 18:27:05,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 362 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:05,840 INFO L231 Difference]: Finished difference. Result has 388 places, 358 transitions, 817 flow [2022-11-18 18:27:05,840 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=817, PETRI_PLACES=388, PETRI_TRANSITIONS=358} [2022-11-18 18:27:05,841 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, 2 predicate places. [2022-11-18 18:27:05,841 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 358 transitions, 817 flow [2022-11-18 18:27:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:05,842 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:05,842 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:05,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:06,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:06,049 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash -372937638, now seen corresponding path program 1 times [2022-11-18 18:27:06,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:06,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429940472] [2022-11-18 18:27:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:06,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:06,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:06,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429940472] [2022-11-18 18:27:06,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429940472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:06,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81716612] [2022-11-18 18:27:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:06,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:06,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:06,236 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:06,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 18:27:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:06,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:06,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:06,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81716612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:06,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:06,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555131995] [2022-11-18 18:27:06,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:06,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-18 18:27:06,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 358 transitions, 817 flow. Second operand has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:06,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:06,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-18 18:27:06,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:07,039 INFO L130 PetriNetUnfolder]: 0/489 cut-off events. [2022-11-18 18:27:07,040 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-18 18:27:07,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 489 events. 0/489 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1314 event pairs, 0 based on Foata normal form. 4/493 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-18 18:27:07,041 INFO L137 encePairwiseOnDemand]: 427/433 looper letters, 29 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2022-11-18 18:27:07,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 382 transitions, 1025 flow [2022-11-18 18:27:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7257 transitions. [2022-11-18 18:27:07,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7980864401187727 [2022-11-18 18:27:07,051 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7257 transitions. [2022-11-18 18:27:07,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7257 transitions. [2022-11-18 18:27:07,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:07,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7257 transitions. [2022-11-18 18:27:07,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 345.57142857142856) internal successors, (7257), 21 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:07,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:07,074 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:07,074 INFO L175 Difference]: Start difference. First operand has 388 places, 358 transitions, 817 flow. Second operand 21 states and 7257 transitions. [2022-11-18 18:27:07,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 382 transitions, 1025 flow [2022-11-18 18:27:07,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 382 transitions, 1011 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:07,083 INFO L231 Difference]: Finished difference. Result has 412 places, 371 transitions, 941 flow [2022-11-18 18:27:07,083 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=941, PETRI_PLACES=412, PETRI_TRANSITIONS=371} [2022-11-18 18:27:07,084 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, 26 predicate places. [2022-11-18 18:27:07,084 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 371 transitions, 941 flow [2022-11-18 18:27:07,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:07,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:07,086 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:07,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:07,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-18 18:27:07,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1461542972, now seen corresponding path program 1 times [2022-11-18 18:27:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:07,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479853578] [2022-11-18 18:27:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:07,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:07,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479853578] [2022-11-18 18:27:07,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479853578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:07,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433198696] [2022-11-18 18:27:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:07,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:07,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:07,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:07,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 18:27:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:27:07,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:08,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:08,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433198696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:08,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:08,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:27:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185475736] [2022-11-18 18:27:08,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:08,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:27:08,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:27:08,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:27:08,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-18 18:27:08,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 371 transitions, 941 flow. Second operand has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:08,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:08,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-18 18:27:08,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:09,183 INFO L130 PetriNetUnfolder]: 0/434 cut-off events. [2022-11-18 18:27:09,184 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-18 18:27:09,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-18 18:27:09,185 INFO L137 encePairwiseOnDemand]: 428/433 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-11-18 18:27:09,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 392 transitions, 1227 flow [2022-11-18 18:27:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 18:27:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-18 18:27:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12423 transitions. [2022-11-18 18:27:09,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7969591993841416 [2022-11-18 18:27:09,198 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12423 transitions. [2022-11-18 18:27:09,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12423 transitions. [2022-11-18 18:27:09,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:09,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12423 transitions. [2022-11-18 18:27:09,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 345.0833333333333) internal successors, (12423), 36 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:09,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:09,237 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:09,237 INFO L175 Difference]: Start difference. First operand has 412 places, 371 transitions, 941 flow. Second operand 36 states and 12423 transitions. [2022-11-18 18:27:09,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 392 transitions, 1227 flow [2022-11-18 18:27:09,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-11-18 18:27:09,247 INFO L231 Difference]: Finished difference. Result has 423 places, 372 transitions, 1000 flow [2022-11-18 18:27:09,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=423, PETRI_TRANSITIONS=372} [2022-11-18 18:27:09,248 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, 37 predicate places. [2022-11-18 18:27:09,249 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 372 transitions, 1000 flow [2022-11-18 18:27:09,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:09,251 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:09,252 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:09,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:09,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:09,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash 970737094, now seen corresponding path program 1 times [2022-11-18 18:27:09,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:09,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844651882] [2022-11-18 18:27:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:09,497 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:27:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:09,539 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:27:09,540 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:27:09,540 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:27:09,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:27:09,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-18 18:27:09,541 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:27:09,541 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:27:09,541 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-11-18 18:27:09,593 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:27:09,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 415 places, 466 transitions, 1124 flow [2022-11-18 18:27:09,959 INFO L130 PetriNetUnfolder]: 124/893 cut-off events. [2022-11-18 18:27:09,960 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-11-18 18:27:09,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 893 events. 124/893 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3171 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 900. Up to 26 conditions per place. [2022-11-18 18:27:09,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 466 transitions, 1124 flow [2022-11-18 18:27:09,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 466 transitions, 1124 flow [2022-11-18 18:27:09,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:27:09,997 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:27:09,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:27:10,003 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:27:10,004 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:27:10,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:10,004 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:10,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1830236186, now seen corresponding path program 1 times [2022-11-18 18:27:10,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:10,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133349803] [2022-11-18 18:27:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:10,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:10,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:10,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133349803] [2022-11-18 18:27:10,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133349803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:10,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:10,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:27:10,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855067374] [2022-11-18 18:27:10,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:10,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:27:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:27:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:27:10,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 466 [2022-11-18 18:27:10,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 466 transitions, 1124 flow. Second operand has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:10,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 466 [2022-11-18 18:27:10,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:10,296 INFO L130 PetriNetUnfolder]: 0/756 cut-off events. [2022-11-18 18:27:10,296 INFO L131 PetriNetUnfolder]: For 430/430 co-relation queries the response was YES. [2022-11-18 18:27:10,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 756 events. 0/756 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2876 event pairs, 0 based on Foata normal form. 456/1186 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-18 18:27:10,298 INFO L137 encePairwiseOnDemand]: 390/466 looper letters, 12 selfloop transitions, 0 changer transitions 11/389 dead transitions. [2022-11-18 18:27:10,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 994 flow [2022-11-18 18:27:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:27:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:27:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 842 transitions. [2022-11-18 18:27:10,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9034334763948498 [2022-11-18 18:27:10,300 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 842 transitions. [2022-11-18 18:27:10,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 842 transitions. [2022-11-18 18:27:10,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:10,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 842 transitions. [2022-11-18 18:27:10,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 421.0) internal successors, (842), 2 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 466.0) internal successors, (1398), 3 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,302 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 466.0) internal successors, (1398), 3 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,302 INFO L175 Difference]: Start difference. First operand has 415 places, 466 transitions, 1124 flow. Second operand 2 states and 842 transitions. [2022-11-18 18:27:10,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 994 flow [2022-11-18 18:27:10,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 389 transitions, 862 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:10,310 INFO L231 Difference]: Finished difference. Result has 415 places, 378 transitions, 816 flow [2022-11-18 18:27:10,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=816, PETRI_PLACES=415, PETRI_TRANSITIONS=378} [2022-11-18 18:27:10,311 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, 0 predicate places. [2022-11-18 18:27:10,311 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 378 transitions, 816 flow [2022-11-18 18:27:10,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:10,312 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:10,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-18 18:27:10,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash 33284827, now seen corresponding path program 1 times [2022-11-18 18:27:10,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:10,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701758862] [2022-11-18 18:27:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:10,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:10,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701758862] [2022-11-18 18:27:10,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701758862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:10,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:10,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:27:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866909257] [2022-11-18 18:27:10,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:10,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:27:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:10,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:27:10,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:27:10,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 466 [2022-11-18 18:27:10,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 378 transitions, 816 flow. Second operand has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:10,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 466 [2022-11-18 18:27:10,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:10,645 INFO L130 PetriNetUnfolder]: 0/602 cut-off events. [2022-11-18 18:27:10,645 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-18 18:27:10,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 602 events. 0/602 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1912 event pairs, 0 based on Foata normal form. 0/590 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-18 18:27:10,648 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 21 selfloop transitions, 2 changer transitions 0/382 dead transitions. [2022-11-18 18:27:10,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 382 transitions, 870 flow [2022-11-18 18:27:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1134 transitions. [2022-11-18 18:27:10,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8111587982832618 [2022-11-18 18:27:10,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1134 transitions. [2022-11-18 18:27:10,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1134 transitions. [2022-11-18 18:27:10,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:10,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1134 transitions. [2022-11-18 18:27:10,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,655 INFO L175 Difference]: Start difference. First operand has 415 places, 378 transitions, 816 flow. Second operand 3 states and 1134 transitions. [2022-11-18 18:27:10,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 382 transitions, 870 flow [2022-11-18 18:27:10,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 382 transitions, 870 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:10,663 INFO L231 Difference]: Finished difference. Result has 407 places, 379 transitions, 828 flow [2022-11-18 18:27:10,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=407, PETRI_TRANSITIONS=379} [2022-11-18 18:27:10,665 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, -8 predicate places. [2022-11-18 18:27:10,665 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 379 transitions, 828 flow [2022-11-18 18:27:10,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:10,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:10,666 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:10,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-11-18 18:27:10,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:10,667 INFO L85 PathProgramCache]: Analyzing trace with hash -747837105, now seen corresponding path program 1 times [2022-11-18 18:27:10,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:10,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171319978] [2022-11-18 18:27:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:10,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:10,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:10,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171319978] [2022-11-18 18:27:10,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171319978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:10,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69092997] [2022-11-18 18:27:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:10,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:10,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:10,761 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:10,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 18:27:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:11,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:11,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:11,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69092997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:11,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:11,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:11,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330784614] [2022-11-18 18:27:11,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:11,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:11,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:11,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:11,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-18 18:27:11,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 379 transitions, 828 flow. Second operand has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:11,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:11,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-18 18:27:11,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:11,533 INFO L130 PetriNetUnfolder]: 0/580 cut-off events. [2022-11-18 18:27:11,533 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-18 18:27:11,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 580 events. 0/580 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1780 event pairs, 0 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-18 18:27:11,536 INFO L137 encePairwiseOnDemand]: 460/466 looper letters, 22 selfloop transitions, 9 changer transitions 0/389 dead transitions. [2022-11-18 18:27:11,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 912 flow [2022-11-18 18:27:11,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3354 transitions. [2022-11-18 18:27:11,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7997138769670958 [2022-11-18 18:27:11,540 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3354 transitions. [2022-11-18 18:27:11,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3354 transitions. [2022-11-18 18:27:11,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:11,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3354 transitions. [2022-11-18 18:27:11,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 372.6666666666667) internal successors, (3354), 9 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:11,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:11,552 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:11,553 INFO L175 Difference]: Start difference. First operand has 407 places, 379 transitions, 828 flow. Second operand 9 states and 3354 transitions. [2022-11-18 18:27:11,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 912 flow [2022-11-18 18:27:11,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 389 transitions, 910 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:11,563 INFO L231 Difference]: Finished difference. Result has 417 places, 385 transitions, 876 flow [2022-11-18 18:27:11,564 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=876, PETRI_PLACES=417, PETRI_TRANSITIONS=385} [2022-11-18 18:27:11,564 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, 2 predicate places. [2022-11-18 18:27:11,564 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 385 transitions, 876 flow [2022-11-18 18:27:11,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:11,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:11,566 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:11,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:11,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-18 18:27:11,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:11,777 INFO L85 PathProgramCache]: Analyzing trace with hash -199917574, now seen corresponding path program 1 times [2022-11-18 18:27:11,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:11,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622154224] [2022-11-18 18:27:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:11,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:11,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:11,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622154224] [2022-11-18 18:27:11,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622154224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:11,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028755944] [2022-11-18 18:27:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:11,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:11,901 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:11,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 18:27:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:12,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:12,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:12,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028755944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:12,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:12,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:12,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569927484] [2022-11-18 18:27:12,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:12,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:12,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:12,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-18 18:27:12,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 385 transitions, 876 flow. Second operand has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:12,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:12,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-18 18:27:12,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:12,886 INFO L130 PetriNetUnfolder]: 0/536 cut-off events. [2022-11-18 18:27:12,886 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-11-18 18:27:12,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 536 events. 0/536 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1490 event pairs, 0 based on Foata normal form. 4/540 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-18 18:27:12,888 INFO L137 encePairwiseOnDemand]: 460/466 looper letters, 30 selfloop transitions, 21 changer transitions 0/409 dead transitions. [2022-11-18 18:27:12,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 409 transitions, 1086 flow [2022-11-18 18:27:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7804 transitions. [2022-11-18 18:27:12,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7974657674228489 [2022-11-18 18:27:12,897 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7804 transitions. [2022-11-18 18:27:12,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7804 transitions. [2022-11-18 18:27:12,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:12,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7804 transitions. [2022-11-18 18:27:12,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 371.6190476190476) internal successors, (7804), 21 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:12,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:12,920 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:12,920 INFO L175 Difference]: Start difference. First operand has 417 places, 385 transitions, 876 flow. Second operand 21 states and 7804 transitions. [2022-11-18 18:27:12,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 409 transitions, 1086 flow [2022-11-18 18:27:12,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 409 transitions, 1072 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:12,930 INFO L231 Difference]: Finished difference. Result has 441 places, 398 transitions, 1000 flow [2022-11-18 18:27:12,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1000, PETRI_PLACES=441, PETRI_TRANSITIONS=398} [2022-11-18 18:27:12,932 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, 26 predicate places. [2022-11-18 18:27:12,932 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 398 transitions, 1000 flow [2022-11-18 18:27:12,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:12,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:12,934 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:12,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-18 18:27:13,141 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1781919396, now seen corresponding path program 1 times [2022-11-18 18:27:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:13,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425226047] [2022-11-18 18:27:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:13,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425226047] [2022-11-18 18:27:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425226047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307221579] [2022-11-18 18:27:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:13,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:13,499 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:13,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 18:27:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:27:13,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:13,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:14,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307221579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:14,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:14,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:27:14,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430618180] [2022-11-18 18:27:14,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:14,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:27:14,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:27:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:27:14,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-18 18:27:14,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 398 transitions, 1000 flow. Second operand has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:14,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:14,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-18 18:27:14,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:15,210 INFO L130 PetriNetUnfolder]: 0/470 cut-off events. [2022-11-18 18:27:15,210 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-11-18 18:27:15,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-11-18 18:27:15,212 INFO L137 encePairwiseOnDemand]: 461/466 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-11-18 18:27:15,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 424 transitions, 1332 flow [2022-11-18 18:27:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 18:27:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 18:27:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14473 transitions. [2022-11-18 18:27:15,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7963574336964895 [2022-11-18 18:27:15,225 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14473 transitions. [2022-11-18 18:27:15,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14473 transitions. [2022-11-18 18:27:15,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:15,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14473 transitions. [2022-11-18 18:27:15,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 371.1025641025641) internal successors, (14473), 39 states have internal predecessors, (14473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:15,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:15,265 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:15,265 INFO L175 Difference]: Start difference. First operand has 441 places, 398 transitions, 1000 flow. Second operand 39 states and 14473 transitions. [2022-11-18 18:27:15,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 424 transitions, 1332 flow [2022-11-18 18:27:15,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-18 18:27:15,278 INFO L231 Difference]: Finished difference. Result has 455 places, 402 transitions, 1083 flow [2022-11-18 18:27:15,279 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=455, PETRI_TRANSITIONS=402} [2022-11-18 18:27:15,279 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, 40 predicate places. [2022-11-18 18:27:15,280 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 402 transitions, 1083 flow [2022-11-18 18:27:15,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:15,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:15,283 INFO L209 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:15,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:15,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-18 18:27:15,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:15,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1002818107, now seen corresponding path program 1 times [2022-11-18 18:27:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:15,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425618465] [2022-11-18 18:27:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:15,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:15,525 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:27:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:15,565 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:27:15,565 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:27:15,565 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:27:15,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:27:15,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-11-18 18:27:15,566 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:27:15,566 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:27:15,566 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-11-18 18:27:15,616 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:27:15,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 444 places, 499 transitions, 1219 flow [2022-11-18 18:27:15,962 INFO L130 PetriNetUnfolder]: 134/962 cut-off events. [2022-11-18 18:27:15,963 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-11-18 18:27:15,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 962 events. 134/962 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3410 event pairs, 0 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 982. Up to 28 conditions per place. [2022-11-18 18:27:15,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 444 places, 499 transitions, 1219 flow [2022-11-18 18:27:16,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 499 transitions, 1219 flow [2022-11-18 18:27:16,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:27:16,002 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:27:16,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:27:16,007 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:27:16,007 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:27:16,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:16,008 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:16,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash 742712410, now seen corresponding path program 1 times [2022-11-18 18:27:16,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:16,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807401878] [2022-11-18 18:27:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:16,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:16,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807401878] [2022-11-18 18:27:16,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807401878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:16,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:16,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:27:16,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049444645] [2022-11-18 18:27:16,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:16,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:27:16,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:27:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:27:16,034 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 403 out of 499 [2022-11-18 18:27:16,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 499 transitions, 1219 flow. Second operand has 2 states, 2 states have (on average 403.5) internal successors, (807), 2 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:16,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 403 of 499 [2022-11-18 18:27:16,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:16,332 INFO L130 PetriNetUnfolder]: 0/814 cut-off events. [2022-11-18 18:27:16,332 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2022-11-18 18:27:16,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 814 events. 0/814 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3123 event pairs, 0 based on Foata normal form. 532/1318 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2022-11-18 18:27:16,334 INFO L137 encePairwiseOnDemand]: 417/499 looper letters, 13 selfloop transitions, 0 changer transitions 11/416 dead transitions. [2022-11-18 18:27:16,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 416 transitions, 1079 flow [2022-11-18 18:27:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:27:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:27:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 901 transitions. [2022-11-18 18:27:16,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9028056112224448 [2022-11-18 18:27:16,337 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 901 transitions. [2022-11-18 18:27:16,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 901 transitions. [2022-11-18 18:27:16,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:16,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 901 transitions. [2022-11-18 18:27:16,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 450.5) internal successors, (901), 2 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,341 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,341 INFO L175 Difference]: Start difference. First operand has 444 places, 499 transitions, 1219 flow. Second operand 2 states and 901 transitions. [2022-11-18 18:27:16,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 416 transitions, 1079 flow [2022-11-18 18:27:16,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 416 transitions, 923 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:16,352 INFO L231 Difference]: Finished difference. Result has 444 places, 405 transitions, 875 flow [2022-11-18 18:27:16,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=875, PETRI_PLACES=444, PETRI_TRANSITIONS=405} [2022-11-18 18:27:16,353 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, 0 predicate places. [2022-11-18 18:27:16,354 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 405 transitions, 875 flow [2022-11-18 18:27:16,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 403.5) internal successors, (807), 2 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:16,355 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:16,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-18 18:27:16,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1054238949, now seen corresponding path program 1 times [2022-11-18 18:27:16,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:16,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403700837] [2022-11-18 18:27:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:16,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403700837] [2022-11-18 18:27:16,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403700837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:16,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:16,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:27:16,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126452376] [2022-11-18 18:27:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:16,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:27:16,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:27:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:27:16,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 499 [2022-11-18 18:27:16,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 405 transitions, 875 flow. Second operand has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:16,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 499 [2022-11-18 18:27:16,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:16,700 INFO L130 PetriNetUnfolder]: 0/649 cut-off events. [2022-11-18 18:27:16,700 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-18 18:27:16,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 649 events. 0/649 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2081 event pairs, 0 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-18 18:27:16,702 INFO L137 encePairwiseOnDemand]: 496/499 looper letters, 22 selfloop transitions, 2 changer transitions 0/409 dead transitions. [2022-11-18 18:27:16,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 409 transitions, 931 flow [2022-11-18 18:27:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1213 transitions. [2022-11-18 18:27:16,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8102872411489646 [2022-11-18 18:27:16,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1213 transitions. [2022-11-18 18:27:16,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1213 transitions. [2022-11-18 18:27:16,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:16,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1213 transitions. [2022-11-18 18:27:16,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.3333333333333) internal successors, (1213), 3 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,709 INFO L175 Difference]: Start difference. First operand has 444 places, 405 transitions, 875 flow. Second operand 3 states and 1213 transitions. [2022-11-18 18:27:16,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 409 transitions, 931 flow [2022-11-18 18:27:16,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 409 transitions, 931 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:16,719 INFO L231 Difference]: Finished difference. Result has 436 places, 406 transitions, 887 flow [2022-11-18 18:27:16,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=887, PETRI_PLACES=436, PETRI_TRANSITIONS=406} [2022-11-18 18:27:16,720 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, -8 predicate places. [2022-11-18 18:27:16,720 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 406 transitions, 887 flow [2022-11-18 18:27:16,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:16,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:16,721 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:16,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-18 18:27:16,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1886235249, now seen corresponding path program 1 times [2022-11-18 18:27:16,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:16,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092910076] [2022-11-18 18:27:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:16,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:16,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:16,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092910076] [2022-11-18 18:27:16,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092910076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:16,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737413359] [2022-11-18 18:27:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:16,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:16,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:16,799 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:16,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 18:27:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:17,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:17,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737413359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:17,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:17,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:17,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56190976] [2022-11-18 18:27:17,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:17,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:17,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:17,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:17,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-18 18:27:17,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 406 transitions, 887 flow. Second operand has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:17,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:17,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-18 18:27:17,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:17,502 INFO L130 PetriNetUnfolder]: 0/627 cut-off events. [2022-11-18 18:27:17,502 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-18 18:27:17,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 627 events. 0/627 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1949 event pairs, 0 based on Foata normal form. 2/629 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-18 18:27:17,504 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 23 selfloop transitions, 9 changer transitions 0/416 dead transitions. [2022-11-18 18:27:17,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 416 transitions, 973 flow [2022-11-18 18:27:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3589 transitions. [2022-11-18 18:27:17,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7991538632821198 [2022-11-18 18:27:17,510 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3589 transitions. [2022-11-18 18:27:17,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3589 transitions. [2022-11-18 18:27:17,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:17,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3589 transitions. [2022-11-18 18:27:17,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 398.77777777777777) internal successors, (3589), 9 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:17,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:17,520 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:17,520 INFO L175 Difference]: Start difference. First operand has 436 places, 406 transitions, 887 flow. Second operand 9 states and 3589 transitions. [2022-11-18 18:27:17,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 416 transitions, 973 flow [2022-11-18 18:27:17,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 416 transitions, 971 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:17,528 INFO L231 Difference]: Finished difference. Result has 446 places, 412 transitions, 935 flow [2022-11-18 18:27:17,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=446, PETRI_TRANSITIONS=412} [2022-11-18 18:27:17,529 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, 2 predicate places. [2022-11-18 18:27:17,530 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 412 transitions, 935 flow [2022-11-18 18:27:17,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:17,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:17,531 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:17,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:17,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:17,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:17,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1356356666, now seen corresponding path program 1 times [2022-11-18 18:27:17,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:17,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437628343] [2022-11-18 18:27:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:17,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437628343] [2022-11-18 18:27:17,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437628343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:17,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629048753] [2022-11-18 18:27:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:17,854 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:17,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 18:27:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:18,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:18,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:18,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:18,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629048753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:18,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:18,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:18,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767880878] [2022-11-18 18:27:18,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:18,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:18,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:18,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-18 18:27:18,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 412 transitions, 935 flow. Second operand has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:18,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:18,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-18 18:27:18,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:18,904 INFO L130 PetriNetUnfolder]: 0/583 cut-off events. [2022-11-18 18:27:18,906 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-18 18:27:18,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 583 events. 0/583 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1654 event pairs, 0 based on Foata normal form. 4/587 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-18 18:27:18,909 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 31 selfloop transitions, 21 changer transitions 0/436 dead transitions. [2022-11-18 18:27:18,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 436 transitions, 1147 flow [2022-11-18 18:27:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8351 transitions. [2022-11-18 18:27:18,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7969271877087508 [2022-11-18 18:27:18,921 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8351 transitions. [2022-11-18 18:27:18,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8351 transitions. [2022-11-18 18:27:18,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:18,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8351 transitions. [2022-11-18 18:27:18,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 397.6666666666667) internal successors, (8351), 21 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:18,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:18,953 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:18,954 INFO L175 Difference]: Start difference. First operand has 446 places, 412 transitions, 935 flow. Second operand 21 states and 8351 transitions. [2022-11-18 18:27:18,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 436 transitions, 1147 flow [2022-11-18 18:27:18,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 436 transitions, 1133 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:18,965 INFO L231 Difference]: Finished difference. Result has 470 places, 425 transitions, 1059 flow [2022-11-18 18:27:18,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1059, PETRI_PLACES=470, PETRI_TRANSITIONS=425} [2022-11-18 18:27:18,966 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, 26 predicate places. [2022-11-18 18:27:18,966 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 425 transitions, 1059 flow [2022-11-18 18:27:18,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:18,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:18,968 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:18,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:19,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:19,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 545246620, now seen corresponding path program 1 times [2022-11-18 18:27:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:19,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010982924] [2022-11-18 18:27:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:19,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:19,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:19,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010982924] [2022-11-18 18:27:19,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010982924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:19,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338959346] [2022-11-18 18:27:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:19,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:19,523 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:19,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 18:27:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:19,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:27:19,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:19,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:20,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338959346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:20,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:20,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:27:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476042177] [2022-11-18 18:27:20,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:20,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:27:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:27:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:27:20,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-18 18:27:20,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 425 transitions, 1059 flow. Second operand has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:20,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:20,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-18 18:27:20,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:21,078 INFO L130 PetriNetUnfolder]: 0/506 cut-off events. [2022-11-18 18:27:21,079 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-18 18:27:21,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-18 18:27:21,080 INFO L137 encePairwiseOnDemand]: 494/499 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-11-18 18:27:21,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 456 transitions, 1437 flow [2022-11-18 18:27:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 18:27:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-18 18:27:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16679 transitions. [2022-11-18 18:27:21,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7958297547475904 [2022-11-18 18:27:21,092 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16679 transitions. [2022-11-18 18:27:21,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16679 transitions. [2022-11-18 18:27:21,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:21,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16679 transitions. [2022-11-18 18:27:21,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 397.1190476190476) internal successors, (16679), 42 states have internal predecessors, (16679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:21,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:21,132 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:21,132 INFO L175 Difference]: Start difference. First operand has 470 places, 425 transitions, 1059 flow. Second operand 42 states and 16679 transitions. [2022-11-18 18:27:21,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 456 transitions, 1437 flow [2022-11-18 18:27:21,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-11-18 18:27:21,141 INFO L231 Difference]: Finished difference. Result has 487 places, 432 transitions, 1166 flow [2022-11-18 18:27:21,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=487, PETRI_TRANSITIONS=432} [2022-11-18 18:27:21,143 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, 43 predicate places. [2022-11-18 18:27:21,143 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 432 transitions, 1166 flow [2022-11-18 18:27:21,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:21,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:21,146 INFO L209 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:21,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-18 18:27:21,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1160896261, now seen corresponding path program 1 times [2022-11-18 18:27:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751116402] [2022-11-18 18:27:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:21,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:21,394 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:27:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:21,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:27:21,445 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:27:21,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:27:21,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:27:21,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-11-18 18:27:21,446 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:27:21,447 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:27:21,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-11-18 18:27:21,506 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:27:21,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 473 places, 532 transitions, 1316 flow [2022-11-18 18:27:21,853 INFO L130 PetriNetUnfolder]: 144/1031 cut-off events. [2022-11-18 18:27:21,853 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-11-18 18:27:21,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 1031 events. 144/1031 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3675 event pairs, 0 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1065. Up to 30 conditions per place. [2022-11-18 18:27:21,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 473 places, 532 transitions, 1316 flow [2022-11-18 18:27:21,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 473 places, 532 transitions, 1316 flow [2022-11-18 18:27:21,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:27:21,885 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:27:21,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:27:21,891 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:27:21,891 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:27:21,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:21,892 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:21,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:21,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2079341402, now seen corresponding path program 1 times [2022-11-18 18:27:21,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:21,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511935798] [2022-11-18 18:27:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:21,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:21,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511935798] [2022-11-18 18:27:21,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511935798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:21,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:21,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:27:21,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79941241] [2022-11-18 18:27:21,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:21,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:27:21,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:21,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:27:21,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:27:21,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 429 out of 532 [2022-11-18 18:27:21,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 532 transitions, 1316 flow. Second operand has 2 states, 2 states have (on average 429.5) internal successors, (859), 2 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:21,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:21,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 429 of 532 [2022-11-18 18:27:21,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:22,198 INFO L130 PetriNetUnfolder]: 0/872 cut-off events. [2022-11-18 18:27:22,198 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-18 18:27:22,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 872 events. 0/872 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3370 event pairs, 0 based on Foata normal form. 614/1456 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-18 18:27:22,199 INFO L137 encePairwiseOnDemand]: 444/532 looper letters, 14 selfloop transitions, 0 changer transitions 11/443 dead transitions. [2022-11-18 18:27:22,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 443 transitions, 1166 flow [2022-11-18 18:27:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:27:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:27:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 960 transitions. [2022-11-18 18:27:22,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2022-11-18 18:27:22,201 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 960 transitions. [2022-11-18 18:27:22,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 960 transitions. [2022-11-18 18:27:22,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:22,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 960 transitions. [2022-11-18 18:27:22,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 480.0) internal successors, (960), 2 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 532.0) internal successors, (1596), 3 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,203 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 532.0) internal successors, (1596), 3 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,203 INFO L175 Difference]: Start difference. First operand has 473 places, 532 transitions, 1316 flow. Second operand 2 states and 960 transitions. [2022-11-18 18:27:22,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 443 transitions, 1166 flow [2022-11-18 18:27:22,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 443 transitions, 984 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:22,212 INFO L231 Difference]: Finished difference. Result has 473 places, 432 transitions, 934 flow [2022-11-18 18:27:22,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=934, PETRI_PLACES=473, PETRI_TRANSITIONS=432} [2022-11-18 18:27:22,213 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, 0 predicate places. [2022-11-18 18:27:22,213 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 432 transitions, 934 flow [2022-11-18 18:27:22,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 429.5) internal successors, (859), 2 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:22,214 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:22,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-11-18 18:27:22,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:22,215 INFO L85 PathProgramCache]: Analyzing trace with hash 282390043, now seen corresponding path program 1 times [2022-11-18 18:27:22,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:22,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978739279] [2022-11-18 18:27:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:22,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:22,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:22,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978739279] [2022-11-18 18:27:22,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978739279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:22,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:22,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:27:22,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166230012] [2022-11-18 18:27:22,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:22,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:27:22,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:22,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:27:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:27:22,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 532 [2022-11-18 18:27:22,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 432 transitions, 934 flow. Second operand has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:22,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 532 [2022-11-18 18:27:22,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:22,523 INFO L130 PetriNetUnfolder]: 0/696 cut-off events. [2022-11-18 18:27:22,523 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-18 18:27:22,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 696 events. 0/696 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2251 event pairs, 0 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-11-18 18:27:22,524 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 23 selfloop transitions, 2 changer transitions 0/436 dead transitions. [2022-11-18 18:27:22,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 436 transitions, 992 flow [2022-11-18 18:27:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1292 transitions. [2022-11-18 18:27:22,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2022-11-18 18:27:22,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1292 transitions. [2022-11-18 18:27:22,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1292 transitions. [2022-11-18 18:27:22,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:22,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1292 transitions. [2022-11-18 18:27:22,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 430.6666666666667) internal successors, (1292), 3 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,529 INFO L175 Difference]: Start difference. First operand has 473 places, 432 transitions, 934 flow. Second operand 3 states and 1292 transitions. [2022-11-18 18:27:22,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 436 transitions, 992 flow [2022-11-18 18:27:22,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 436 transitions, 992 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:22,536 INFO L231 Difference]: Finished difference. Result has 465 places, 433 transitions, 946 flow [2022-11-18 18:27:22,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=946, PETRI_PLACES=465, PETRI_TRANSITIONS=433} [2022-11-18 18:27:22,537 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, -8 predicate places. [2022-11-18 18:27:22,537 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 433 transitions, 946 flow [2022-11-18 18:27:22,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:22,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:22,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-11-18 18:27:22,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:22,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1832404689, now seen corresponding path program 1 times [2022-11-18 18:27:22,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:22,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334698027] [2022-11-18 18:27:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:22,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:22,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:22,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334698027] [2022-11-18 18:27:22,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334698027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:22,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197806893] [2022-11-18 18:27:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:22,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:22,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:22,590 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:22,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 18:27:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:22,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:22,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:22,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197806893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:22,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:22,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:22,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690321784] [2022-11-18 18:27:22,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:22,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:22,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:22,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:22,995 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-18 18:27:22,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 433 transitions, 946 flow. Second operand has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:22,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:22,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-18 18:27:22,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:23,348 INFO L130 PetriNetUnfolder]: 0/674 cut-off events. [2022-11-18 18:27:23,349 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 18:27:23,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 674 events. 0/674 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2112 event pairs, 0 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-18 18:27:23,350 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 24 selfloop transitions, 9 changer transitions 0/443 dead transitions. [2022-11-18 18:27:23,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 443 transitions, 1034 flow [2022-11-18 18:27:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3824 transitions. [2022-11-18 18:27:23,353 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7986633249791144 [2022-11-18 18:27:23,353 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3824 transitions. [2022-11-18 18:27:23,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3824 transitions. [2022-11-18 18:27:23,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:23,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3824 transitions. [2022-11-18 18:27:23,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 424.8888888888889) internal successors, (3824), 9 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:23,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:23,358 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:23,359 INFO L175 Difference]: Start difference. First operand has 465 places, 433 transitions, 946 flow. Second operand 9 states and 3824 transitions. [2022-11-18 18:27:23,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 443 transitions, 1034 flow [2022-11-18 18:27:23,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 443 transitions, 1032 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:23,364 INFO L231 Difference]: Finished difference. Result has 475 places, 439 transitions, 994 flow [2022-11-18 18:27:23,364 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=475, PETRI_TRANSITIONS=439} [2022-11-18 18:27:23,365 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, 2 predicate places. [2022-11-18 18:27:23,365 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 439 transitions, 994 flow [2022-11-18 18:27:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:23,366 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:23,366 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:23,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-18 18:27:23,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:23,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash 917786, now seen corresponding path program 1 times [2022-11-18 18:27:23,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:23,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233330096] [2022-11-18 18:27:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:23,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:23,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233330096] [2022-11-18 18:27:23,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233330096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:23,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396564093] [2022-11-18 18:27:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:23,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:23,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:23,663 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:23,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 18:27:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:23,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:24,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:24,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396564093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:24,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:24,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:24,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188525213] [2022-11-18 18:27:24,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:24,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:24,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:24,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-18 18:27:24,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 439 transitions, 994 flow. Second operand has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:24,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:24,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-18 18:27:24,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:24,566 INFO L130 PetriNetUnfolder]: 0/630 cut-off events. [2022-11-18 18:27:24,566 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-11-18 18:27:24,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 630 events. 0/630 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1829 event pairs, 0 based on Foata normal form. 4/634 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-18 18:27:24,568 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 32 selfloop transitions, 21 changer transitions 0/463 dead transitions. [2022-11-18 18:27:24,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 463 transitions, 1208 flow [2022-11-18 18:27:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8898 transitions. [2022-11-18 18:27:24,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7964554242749732 [2022-11-18 18:27:24,573 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8898 transitions. [2022-11-18 18:27:24,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8898 transitions. [2022-11-18 18:27:24,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:24,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8898 transitions. [2022-11-18 18:27:24,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 423.7142857142857) internal successors, (8898), 21 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:24,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:24,586 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:24,586 INFO L175 Difference]: Start difference. First operand has 475 places, 439 transitions, 994 flow. Second operand 21 states and 8898 transitions. [2022-11-18 18:27:24,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 463 transitions, 1208 flow [2022-11-18 18:27:24,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 463 transitions, 1194 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:24,592 INFO L231 Difference]: Finished difference. Result has 499 places, 452 transitions, 1118 flow [2022-11-18 18:27:24,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1118, PETRI_PLACES=499, PETRI_TRANSITIONS=452} [2022-11-18 18:27:24,594 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, 26 predicate places. [2022-11-18 18:27:24,594 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 452 transitions, 1118 flow [2022-11-18 18:27:24,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:24,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:24,596 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:24,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:24,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:24,802 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash -146893572, now seen corresponding path program 1 times [2022-11-18 18:27:24,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:24,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143013797] [2022-11-18 18:27:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:24,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:25,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:25,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143013797] [2022-11-18 18:27:25,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143013797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:25,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055386343] [2022-11-18 18:27:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:25,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:25,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:25,094 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:25,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 18:27:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:27:25,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:25,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:25,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055386343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:25,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:25,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:27:25,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866765230] [2022-11-18 18:27:25,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:25,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:27:25,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:25,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:27:25,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:27:25,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-18 18:27:25,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 452 transitions, 1118 flow. Second operand has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:25,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:25,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-18 18:27:25,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:26,762 INFO L130 PetriNetUnfolder]: 0/542 cut-off events. [2022-11-18 18:27:26,762 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-18 18:27:26,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-11-18 18:27:26,763 INFO L137 encePairwiseOnDemand]: 527/532 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-11-18 18:27:26,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 488 transitions, 1542 flow [2022-11-18 18:27:26,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:27:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:27:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19041 transitions. [2022-11-18 18:27:26,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7953634085213033 [2022-11-18 18:27:26,777 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19041 transitions. [2022-11-18 18:27:26,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19041 transitions. [2022-11-18 18:27:26,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:26,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19041 transitions. [2022-11-18 18:27:26,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 423.1333333333333) internal successors, (19041), 45 states have internal predecessors, (19041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:26,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:26,808 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:26,809 INFO L175 Difference]: Start difference. First operand has 499 places, 452 transitions, 1118 flow. Second operand 45 states and 19041 transitions. [2022-11-18 18:27:26,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 488 transitions, 1542 flow [2022-11-18 18:27:26,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-11-18 18:27:26,819 INFO L231 Difference]: Finished difference. Result has 519 places, 462 transitions, 1249 flow [2022-11-18 18:27:26,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=519, PETRI_TRANSITIONS=462} [2022-11-18 18:27:26,820 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, 46 predicate places. [2022-11-18 18:27:26,821 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 462 transitions, 1249 flow [2022-11-18 18:27:26,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:26,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:26,824 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:26,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:27,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-11-18 18:27:27,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash 596163110, now seen corresponding path program 1 times [2022-11-18 18:27:27,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:27,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40941716] [2022-11-18 18:27:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:27,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:27,061 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:27:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:27,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:27:27,105 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:27:27,105 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:27:27,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:27:27,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-11-18 18:27:27,106 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:27:27,106 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:27:27,106 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-11-18 18:27:27,163 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:27:27,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 502 places, 565 transitions, 1415 flow [2022-11-18 18:27:27,574 INFO L130 PetriNetUnfolder]: 154/1100 cut-off events. [2022-11-18 18:27:27,574 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-11-18 18:27:27,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1100 events. 154/1100 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3966 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1151. Up to 32 conditions per place. [2022-11-18 18:27:27,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 502 places, 565 transitions, 1415 flow [2022-11-18 18:27:27,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 502 places, 565 transitions, 1415 flow [2022-11-18 18:27:27,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:27:27,610 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:27:27,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:27:27,615 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:27:27,615 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:27:27,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:27,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:27,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:27,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1545155866, now seen corresponding path program 1 times [2022-11-18 18:27:27,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:27,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315866076] [2022-11-18 18:27:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:27,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:27,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315866076] [2022-11-18 18:27:27,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315866076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:27,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:27,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:27:27,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761655941] [2022-11-18 18:27:27,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:27,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:27:27,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:27,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:27:27,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:27:27,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 455 out of 565 [2022-11-18 18:27:27,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 565 transitions, 1415 flow. Second operand has 2 states, 2 states have (on average 455.5) internal successors, (911), 2 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:27,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:27,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 455 of 565 [2022-11-18 18:27:27,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:28,025 INFO L130 PetriNetUnfolder]: 0/930 cut-off events. [2022-11-18 18:27:28,025 INFO L131 PetriNetUnfolder]: For 785/785 co-relation queries the response was YES. [2022-11-18 18:27:28,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 930 events. 0/930 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3617 event pairs, 0 based on Foata normal form. 702/1600 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2022-11-18 18:27:28,026 INFO L137 encePairwiseOnDemand]: 471/565 looper letters, 15 selfloop transitions, 0 changer transitions 11/470 dead transitions. [2022-11-18 18:27:28,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 470 transitions, 1255 flow [2022-11-18 18:27:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:27:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:27:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1019 transitions. [2022-11-18 18:27:28,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9017699115044248 [2022-11-18 18:27:28,029 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1019 transitions. [2022-11-18 18:27:28,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1019 transitions. [2022-11-18 18:27:28,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:28,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1019 transitions. [2022-11-18 18:27:28,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 509.5) internal successors, (1019), 2 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 565.0) internal successors, (1695), 3 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,032 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 565.0) internal successors, (1695), 3 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,032 INFO L175 Difference]: Start difference. First operand has 502 places, 565 transitions, 1415 flow. Second operand 2 states and 1019 transitions. [2022-11-18 18:27:28,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 470 transitions, 1255 flow [2022-11-18 18:27:28,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 470 transitions, 1045 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:28,038 INFO L231 Difference]: Finished difference. Result has 502 places, 459 transitions, 993 flow [2022-11-18 18:27:28,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=993, PETRI_PLACES=502, PETRI_TRANSITIONS=459} [2022-11-18 18:27:28,039 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, 0 predicate places. [2022-11-18 18:27:28,039 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 459 transitions, 993 flow [2022-11-18 18:27:28,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 455.5) internal successors, (911), 2 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:28,040 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:28,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-11-18 18:27:28,040 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:28,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash -251795493, now seen corresponding path program 1 times [2022-11-18 18:27:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:28,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466136132] [2022-11-18 18:27:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:28,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466136132] [2022-11-18 18:27:28,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466136132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:28,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:28,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:27:28,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100500848] [2022-11-18 18:27:28,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:28,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:27:28,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:28,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:27:28,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:27:28,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 565 [2022-11-18 18:27:28,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 459 transitions, 993 flow. Second operand has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:28,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 565 [2022-11-18 18:27:28,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:28,462 INFO L130 PetriNetUnfolder]: 0/743 cut-off events. [2022-11-18 18:27:28,462 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-18 18:27:28,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 743 events. 0/743 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2425 event pairs, 0 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-11-18 18:27:28,464 INFO L137 encePairwiseOnDemand]: 562/565 looper letters, 24 selfloop transitions, 2 changer transitions 0/463 dead transitions. [2022-11-18 18:27:28,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 463 transitions, 1053 flow [2022-11-18 18:27:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1371 transitions. [2022-11-18 18:27:28,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8088495575221238 [2022-11-18 18:27:28,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1371 transitions. [2022-11-18 18:27:28,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1371 transitions. [2022-11-18 18:27:28,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:28,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1371 transitions. [2022-11-18 18:27:28,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 457.0) internal successors, (1371), 3 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,472 INFO L175 Difference]: Start difference. First operand has 502 places, 459 transitions, 993 flow. Second operand 3 states and 1371 transitions. [2022-11-18 18:27:28,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 463 transitions, 1053 flow [2022-11-18 18:27:28,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 463 transitions, 1053 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:28,481 INFO L231 Difference]: Finished difference. Result has 494 places, 460 transitions, 1005 flow [2022-11-18 18:27:28,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1005, PETRI_PLACES=494, PETRI_TRANSITIONS=460} [2022-11-18 18:27:28,483 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, -8 predicate places. [2022-11-18 18:27:28,483 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 460 transitions, 1005 flow [2022-11-18 18:27:28,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:28,484 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:28,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-11-18 18:27:28,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:28,485 INFO L85 PathProgramCache]: Analyzing trace with hash -586345425, now seen corresponding path program 1 times [2022-11-18 18:27:28,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:28,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128866344] [2022-11-18 18:27:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:28,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:28,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:28,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128866344] [2022-11-18 18:27:28,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128866344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:28,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323309385] [2022-11-18 18:27:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:28,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:28,535 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:28,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 18:27:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:28,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:28,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323309385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:28,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:28,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:28,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034855316] [2022-11-18 18:27:28,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:28,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:28,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:28,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:28,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:28,981 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-18 18:27:28,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 460 transitions, 1005 flow. Second operand has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:28,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:28,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-18 18:27:28,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:29,355 INFO L130 PetriNetUnfolder]: 0/721 cut-off events. [2022-11-18 18:27:29,355 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-18 18:27:29,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 721 events. 0/721 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2282 event pairs, 0 based on Foata normal form. 2/723 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-18 18:27:29,356 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 25 selfloop transitions, 9 changer transitions 0/470 dead transitions. [2022-11-18 18:27:29,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 470 transitions, 1095 flow [2022-11-18 18:27:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4059 transitions. [2022-11-18 18:27:29,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7982300884955752 [2022-11-18 18:27:29,360 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4059 transitions. [2022-11-18 18:27:29,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4059 transitions. [2022-11-18 18:27:29,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:29,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4059 transitions. [2022-11-18 18:27:29,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 451.0) internal successors, (4059), 9 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:29,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:29,371 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:29,371 INFO L175 Difference]: Start difference. First operand has 494 places, 460 transitions, 1005 flow. Second operand 9 states and 4059 transitions. [2022-11-18 18:27:29,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 470 transitions, 1095 flow [2022-11-18 18:27:29,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 470 transitions, 1093 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:29,377 INFO L231 Difference]: Finished difference. Result has 504 places, 466 transitions, 1053 flow [2022-11-18 18:27:29,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1053, PETRI_PLACES=504, PETRI_TRANSITIONS=466} [2022-11-18 18:27:29,378 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, 2 predicate places. [2022-11-18 18:27:29,378 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 466 transitions, 1053 flow [2022-11-18 18:27:29,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:29,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:29,379 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:29,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-18 18:27:29,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:29,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash 28733082, now seen corresponding path program 1 times [2022-11-18 18:27:29,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:29,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508760068] [2022-11-18 18:27:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:29,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:29,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508760068] [2022-11-18 18:27:29,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508760068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:29,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456999518] [2022-11-18 18:27:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:29,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:29,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:29,675 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:29,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 18:27:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:29,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:30,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:30,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456999518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:30,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:30,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327753602] [2022-11-18 18:27:30,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:30,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:30,160 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-18 18:27:30,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 466 transitions, 1053 flow. Second operand has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:30,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:30,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-18 18:27:30,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:30,668 INFO L130 PetriNetUnfolder]: 0/677 cut-off events. [2022-11-18 18:27:30,668 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-18 18:27:30,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 677 events. 0/677 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2001 event pairs, 0 based on Foata normal form. 4/681 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-18 18:27:30,669 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 33 selfloop transitions, 21 changer transitions 0/490 dead transitions. [2022-11-18 18:27:30,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 490 transitions, 1269 flow [2022-11-18 18:27:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9445 transitions. [2022-11-18 18:27:30,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7960387694900969 [2022-11-18 18:27:30,676 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9445 transitions. [2022-11-18 18:27:30,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9445 transitions. [2022-11-18 18:27:30,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:30,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9445 transitions. [2022-11-18 18:27:30,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 449.76190476190476) internal successors, (9445), 21 states have internal predecessors, (9445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:30,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:30,691 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:30,691 INFO L175 Difference]: Start difference. First operand has 504 places, 466 transitions, 1053 flow. Second operand 21 states and 9445 transitions. [2022-11-18 18:27:30,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 490 transitions, 1269 flow [2022-11-18 18:27:30,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 490 transitions, 1255 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:30,700 INFO L231 Difference]: Finished difference. Result has 528 places, 479 transitions, 1177 flow [2022-11-18 18:27:30,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1177, PETRI_PLACES=528, PETRI_TRANSITIONS=479} [2022-11-18 18:27:30,701 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, 26 predicate places. [2022-11-18 18:27:30,701 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 479 transitions, 1177 flow [2022-11-18 18:27:30,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:30,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:30,702 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:30,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:30,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-11-18 18:27:30,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 436627324, now seen corresponding path program 1 times [2022-11-18 18:27:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753356534] [2022-11-18 18:27:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:31,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753356534] [2022-11-18 18:27:31,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753356534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:31,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762238821] [2022-11-18 18:27:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:31,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:31,162 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:31,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 18:27:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:31,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:27:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:31,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:32,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762238821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:32,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:32,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:27:32,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910975728] [2022-11-18 18:27:32,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:32,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:27:32,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:27:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:27:32,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-18 18:27:32,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 479 transitions, 1177 flow. Second operand has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:32,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:32,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-18 18:27:32,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:33,036 INFO L130 PetriNetUnfolder]: 0/589 cut-off events. [2022-11-18 18:27:33,036 INFO L131 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-11-18 18:27:33,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 589 events. 0/589 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1419 event pairs, 0 based on Foata normal form. 8/597 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-18 18:27:33,038 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 49 selfloop transitions, 45 changer transitions 0/530 dead transitions. [2022-11-18 18:27:33,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 530 transitions, 1681 flow [2022-11-18 18:27:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:27:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:27:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20217 transitions. [2022-11-18 18:27:33,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7951622418879056 [2022-11-18 18:27:33,048 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20217 transitions. [2022-11-18 18:27:33,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20217 transitions. [2022-11-18 18:27:33,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:33,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20217 transitions. [2022-11-18 18:27:33,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 449.26666666666665) internal successors, (20217), 45 states have internal predecessors, (20217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:33,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:33,082 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:33,082 INFO L175 Difference]: Start difference. First operand has 528 places, 479 transitions, 1177 flow. Second operand 45 states and 20217 transitions. [2022-11-18 18:27:33,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 530 transitions, 1681 flow [2022-11-18 18:27:33,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 530 transitions, 1641 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:27:33,095 INFO L231 Difference]: Finished difference. Result has 575 places, 504 transitions, 1455 flow [2022-11-18 18:27:33,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1455, PETRI_PLACES=575, PETRI_TRANSITIONS=504} [2022-11-18 18:27:33,096 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, 73 predicate places. [2022-11-18 18:27:33,096 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 504 transitions, 1455 flow [2022-11-18 18:27:33,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:33,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:33,100 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:33,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:33,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-11-18 18:27:33,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1788616648, now seen corresponding path program 1 times [2022-11-18 18:27:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517184590] [2022-11-18 18:27:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:33,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:33,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:27:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:33,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:27:33,387 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:27:33,387 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:27:33,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:27:33,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-11-18 18:27:33,388 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-18 18:27:33,388 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:27:33,388 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-11-18 18:27:33,440 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:27:33,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 531 places, 598 transitions, 1516 flow [2022-11-18 18:27:33,820 INFO L130 PetriNetUnfolder]: 164/1169 cut-off events. [2022-11-18 18:27:33,820 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-18 18:27:33,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 1169 events. 164/1169 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4221 event pairs, 0 based on Foata normal form. 0/971 useless extension candidates. Maximal degree in co-relation 1238. Up to 34 conditions per place. [2022-11-18 18:27:33,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 598 transitions, 1516 flow [2022-11-18 18:27:33,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 531 places, 598 transitions, 1516 flow [2022-11-18 18:27:33,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:27:33,862 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:27:33,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:27:33,867 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:27:33,868 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:27:33,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:33,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:33,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash -859844198, now seen corresponding path program 1 times [2022-11-18 18:27:33,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:33,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136070022] [2022-11-18 18:27:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:33,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:33,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:33,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136070022] [2022-11-18 18:27:33,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136070022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:33,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:33,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:27:33,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605969441] [2022-11-18 18:27:33,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:33,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:27:33,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:27:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:27:33,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 598 [2022-11-18 18:27:33,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 598 transitions, 1516 flow. Second operand has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:33,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:33,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 598 [2022-11-18 18:27:33,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:34,239 INFO L130 PetriNetUnfolder]: 0/988 cut-off events. [2022-11-18 18:27:34,239 INFO L131 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-11-18 18:27:34,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 988 events. 0/988 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3881 event pairs, 0 based on Foata normal form. 796/1750 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-18 18:27:34,240 INFO L137 encePairwiseOnDemand]: 498/598 looper letters, 16 selfloop transitions, 0 changer transitions 11/497 dead transitions. [2022-11-18 18:27:34,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1346 flow [2022-11-18 18:27:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:27:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:27:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1078 transitions. [2022-11-18 18:27:34,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9013377926421404 [2022-11-18 18:27:34,242 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1078 transitions. [2022-11-18 18:27:34,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1078 transitions. [2022-11-18 18:27:34,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:34,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1078 transitions. [2022-11-18 18:27:34,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 539.0) internal successors, (1078), 2 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,245 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,245 INFO L175 Difference]: Start difference. First operand has 531 places, 598 transitions, 1516 flow. Second operand 2 states and 1078 transitions. [2022-11-18 18:27:34,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1346 flow [2022-11-18 18:27:34,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 497 transitions, 1106 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:34,252 INFO L231 Difference]: Finished difference. Result has 531 places, 486 transitions, 1052 flow [2022-11-18 18:27:34,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1052, PETRI_PLACES=531, PETRI_TRANSITIONS=486} [2022-11-18 18:27:34,253 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 0 predicate places. [2022-11-18 18:27:34,253 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 486 transitions, 1052 flow [2022-11-18 18:27:34,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:34,254 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:34,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-11-18 18:27:34,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1638171739, now seen corresponding path program 1 times [2022-11-18 18:27:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:34,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900669338] [2022-11-18 18:27:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:34,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:34,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900669338] [2022-11-18 18:27:34,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900669338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:34,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:34,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:27:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538046645] [2022-11-18 18:27:34,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:34,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:27:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:34,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:27:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:27:34,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 598 [2022-11-18 18:27:34,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 486 transitions, 1052 flow. Second operand has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:34,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 598 [2022-11-18 18:27:34,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:34,623 INFO L130 PetriNetUnfolder]: 0/790 cut-off events. [2022-11-18 18:27:34,624 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-18 18:27:34,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 790 events. 0/790 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2596 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-11-18 18:27:34,625 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 25 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-11-18 18:27:34,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 490 transitions, 1114 flow [2022-11-18 18:27:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1450 transitions. [2022-11-18 18:27:34,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8082497212931996 [2022-11-18 18:27:34,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1450 transitions. [2022-11-18 18:27:34,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1450 transitions. [2022-11-18 18:27:34,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:34,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1450 transitions. [2022-11-18 18:27:34,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 483.3333333333333) internal successors, (1450), 3 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,631 INFO L175 Difference]: Start difference. First operand has 531 places, 486 transitions, 1052 flow. Second operand 3 states and 1450 transitions. [2022-11-18 18:27:34,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 490 transitions, 1114 flow [2022-11-18 18:27:34,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1114 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:34,640 INFO L231 Difference]: Finished difference. Result has 523 places, 487 transitions, 1064 flow [2022-11-18 18:27:34,641 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1064, PETRI_PLACES=523, PETRI_TRANSITIONS=487} [2022-11-18 18:27:34,642 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, -8 predicate places. [2022-11-18 18:27:34,642 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 487 transitions, 1064 flow [2022-11-18 18:27:34,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:34,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:34,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:34,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-11-18 18:27:34,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1851942543, now seen corresponding path program 1 times [2022-11-18 18:27:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:34,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860590921] [2022-11-18 18:27:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:34,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:34,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:34,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860590921] [2022-11-18 18:27:34,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860590921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:34,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881849509] [2022-11-18 18:27:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:34,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:34,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:34,696 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:34,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 18:27:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:35,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:35,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:35,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:35,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881849509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:35,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:35,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:35,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789536725] [2022-11-18 18:27:35,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:35,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:35,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:35,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:35,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-18 18:27:35,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 487 transitions, 1064 flow. Second operand has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:35,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:35,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-18 18:27:35,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:35,529 INFO L130 PetriNetUnfolder]: 0/768 cut-off events. [2022-11-18 18:27:35,529 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-18 18:27:35,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 768 events. 0/768 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2464 event pairs, 0 based on Foata normal form. 2/770 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-11-18 18:27:35,531 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 26 selfloop transitions, 9 changer transitions 0/497 dead transitions. [2022-11-18 18:27:35,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1156 flow [2022-11-18 18:27:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4294 transitions. [2022-11-18 18:27:35,536 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7978446674098848 [2022-11-18 18:27:35,536 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4294 transitions. [2022-11-18 18:27:35,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4294 transitions. [2022-11-18 18:27:35,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:35,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4294 transitions. [2022-11-18 18:27:35,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 477.1111111111111) internal successors, (4294), 9 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:35,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:35,546 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:35,546 INFO L175 Difference]: Start difference. First operand has 523 places, 487 transitions, 1064 flow. Second operand 9 states and 4294 transitions. [2022-11-18 18:27:35,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1156 flow [2022-11-18 18:27:35,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 497 transitions, 1154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:35,553 INFO L231 Difference]: Finished difference. Result has 533 places, 493 transitions, 1112 flow [2022-11-18 18:27:35,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1112, PETRI_PLACES=533, PETRI_TRANSITIONS=493} [2022-11-18 18:27:35,554 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 2 predicate places. [2022-11-18 18:27:35,554 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 493 transitions, 1112 flow [2022-11-18 18:27:35,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:35,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:35,555 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:35,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-18 18:27:35,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:35,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:35,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1439802554, now seen corresponding path program 1 times [2022-11-18 18:27:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:35,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304963675] [2022-11-18 18:27:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:35,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:35,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304963675] [2022-11-18 18:27:35,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304963675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959332023] [2022-11-18 18:27:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:35,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:35,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:35,871 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:35,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 18:27:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:36,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:36,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959332023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:36,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:36,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:36,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879112473] [2022-11-18 18:27:36,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:36,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:36,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:36,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:36,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-18 18:27:36,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 493 transitions, 1112 flow. Second operand has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:36,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:36,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-18 18:27:36,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:37,006 INFO L130 PetriNetUnfolder]: 0/724 cut-off events. [2022-11-18 18:27:37,006 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-18 18:27:37,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 724 events. 0/724 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2164 event pairs, 0 based on Foata normal form. 4/728 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-18 18:27:37,008 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 34 selfloop transitions, 21 changer transitions 0/517 dead transitions. [2022-11-18 18:27:37,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 517 transitions, 1330 flow [2022-11-18 18:27:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9992 transitions. [2022-11-18 18:27:37,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7956681000159261 [2022-11-18 18:27:37,014 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9992 transitions. [2022-11-18 18:27:37,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9992 transitions. [2022-11-18 18:27:37,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:37,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9992 transitions. [2022-11-18 18:27:37,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 475.8095238095238) internal successors, (9992), 21 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:37,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:37,029 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:37,029 INFO L175 Difference]: Start difference. First operand has 533 places, 493 transitions, 1112 flow. Second operand 21 states and 9992 transitions. [2022-11-18 18:27:37,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 517 transitions, 1330 flow [2022-11-18 18:27:37,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 517 transitions, 1316 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:37,035 INFO L231 Difference]: Finished difference. Result has 557 places, 506 transitions, 1236 flow [2022-11-18 18:27:37,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1236, PETRI_PLACES=557, PETRI_TRANSITIONS=506} [2022-11-18 18:27:37,036 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 26 predicate places. [2022-11-18 18:27:37,037 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 506 transitions, 1236 flow [2022-11-18 18:27:37,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:37,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:37,039 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:37,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:37,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:37,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:37,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:37,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1999157988, now seen corresponding path program 1 times [2022-11-18 18:27:37,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:37,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104672902] [2022-11-18 18:27:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:37,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:37,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:37,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104672902] [2022-11-18 18:27:37,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104672902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:37,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358957022] [2022-11-18 18:27:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:37,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:37,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:37,499 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:37,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-18 18:27:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:37,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:27:37,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:37,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:38,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358957022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:38,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:38,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:27:38,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634312286] [2022-11-18 18:27:38,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:38,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:27:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:27:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:27:38,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-18 18:27:38,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 506 transitions, 1236 flow. Second operand has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:38,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:38,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-18 18:27:38,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:39,344 INFO L130 PetriNetUnfolder]: 0/636 cut-off events. [2022-11-18 18:27:39,345 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-11-18 18:27:39,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 636 events. 0/636 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1590 event pairs, 0 based on Foata normal form. 8/644 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-11-18 18:27:39,346 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 50 selfloop transitions, 45 changer transitions 0/557 dead transitions. [2022-11-18 18:27:39,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 557 transitions, 1742 flow [2022-11-18 18:27:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:27:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:27:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21388 transitions. [2022-11-18 18:27:39,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7947974730583426 [2022-11-18 18:27:39,361 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21388 transitions. [2022-11-18 18:27:39,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21388 transitions. [2022-11-18 18:27:39,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:39,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21388 transitions. [2022-11-18 18:27:39,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 475.2888888888889) internal successors, (21388), 45 states have internal predecessors, (21388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:39,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:39,398 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:39,398 INFO L175 Difference]: Start difference. First operand has 557 places, 506 transitions, 1236 flow. Second operand 45 states and 21388 transitions. [2022-11-18 18:27:39,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 557 transitions, 1742 flow [2022-11-18 18:27:39,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 557 transitions, 1702 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:27:39,410 INFO L231 Difference]: Finished difference. Result has 604 places, 531 transitions, 1514 flow [2022-11-18 18:27:39,411 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1514, PETRI_PLACES=604, PETRI_TRANSITIONS=531} [2022-11-18 18:27:39,412 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 73 predicate places. [2022-11-18 18:27:39,412 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 531 transitions, 1514 flow [2022-11-18 18:27:39,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:39,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:39,415 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:39,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-18 18:27:39,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-11-18 18:27:39,622 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:39,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2082898416, now seen corresponding path program 1 times [2022-11-18 18:27:39,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:39,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322778274] [2022-11-18 18:27:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:39,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:40,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:40,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322778274] [2022-11-18 18:27:40,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322778274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254823557] [2022-11-18 18:27:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:40,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:40,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:40,400 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:40,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-18 18:27:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:40,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:27:40,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:41,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:42,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254823557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:42,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:42,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:27:42,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078749928] [2022-11-18 18:27:42,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:42,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:27:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:27:42,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:27:42,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-18 18:27:42,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 531 transitions, 1514 flow. Second operand has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:42,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:42,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-18 18:27:42,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:43,279 INFO L130 PetriNetUnfolder]: 0/614 cut-off events. [2022-11-18 18:27:43,279 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-11-18 18:27:43,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-11-18 18:27:43,280 INFO L137 encePairwiseOnDemand]: 593/598 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-11-18 18:27:43,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-11-18 18:27:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 18:27:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-18 18:27:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24225 transitions. [2022-11-18 18:27:43,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.794314381270903 [2022-11-18 18:27:43,293 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24225 transitions. [2022-11-18 18:27:43,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24225 transitions. [2022-11-18 18:27:43,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:43,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24225 transitions. [2022-11-18 18:27:43,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:43,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:43,328 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:43,328 INFO L175 Difference]: Start difference. First operand has 604 places, 531 transitions, 1514 flow. Second operand 51 states and 24225 transitions. [2022-11-18 18:27:43,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-11-18 18:27:43,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-11-18 18:27:43,337 INFO L231 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-11-18 18:27:43,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-11-18 18:27:43,338 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 79 predicate places. [2022-11-18 18:27:43,338 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-11-18 18:27:43,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:43,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:43,343 INFO L209 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:43,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:43,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-11-18 18:27:43,550 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:43,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash -294565749, now seen corresponding path program 1 times [2022-11-18 18:27:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:43,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536393356] [2022-11-18 18:27:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:43,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:43,583 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:27:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:43,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:27:43,630 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:27:43,631 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:27:43,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:27:43,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-11-18 18:27:43,631 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:43,632 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:27:43,632 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-11-18 18:27:43,692 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:27:43,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 560 places, 631 transitions, 1619 flow [2022-11-18 18:27:44,131 INFO L130 PetriNetUnfolder]: 174/1238 cut-off events. [2022-11-18 18:27:44,131 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-11-18 18:27:44,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 1238 events. 174/1238 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4460 event pairs, 0 based on Foata normal form. 0/1028 useless extension candidates. Maximal degree in co-relation 1326. Up to 36 conditions per place. [2022-11-18 18:27:44,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 560 places, 631 transitions, 1619 flow [2022-11-18 18:27:44,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 560 places, 631 transitions, 1619 flow [2022-11-18 18:27:44,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:27:44,176 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:27:44,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:27:44,181 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:27:44,181 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:27:44,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:44,181 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:44,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash -840691494, now seen corresponding path program 1 times [2022-11-18 18:27:44,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:44,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561406587] [2022-11-18 18:27:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:44,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:44,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:44,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561406587] [2022-11-18 18:27:44,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561406587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:44,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:44,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:27:44,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796225910] [2022-11-18 18:27:44,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:44,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:27:44,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:44,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:27:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:27:44,196 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 507 out of 631 [2022-11-18 18:27:44,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 631 transitions, 1619 flow. Second operand has 2 states, 2 states have (on average 507.5) internal successors, (1015), 2 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:44,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:44,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 507 of 631 [2022-11-18 18:27:44,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:44,590 INFO L130 PetriNetUnfolder]: 0/1046 cut-off events. [2022-11-18 18:27:44,590 INFO L131 PetriNetUnfolder]: For 1105/1105 co-relation queries the response was YES. [2022-11-18 18:27:44,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 1046 events. 0/1046 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4111 event pairs, 0 based on Foata normal form. 896/1906 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-18 18:27:44,592 INFO L137 encePairwiseOnDemand]: 525/631 looper letters, 17 selfloop transitions, 0 changer transitions 11/524 dead transitions. [2022-11-18 18:27:44,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 524 transitions, 1439 flow [2022-11-18 18:27:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:27:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:27:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1137 transitions. [2022-11-18 18:27:44,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9009508716323297 [2022-11-18 18:27:44,594 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1137 transitions. [2022-11-18 18:27:44,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1137 transitions. [2022-11-18 18:27:44,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:44,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1137 transitions. [2022-11-18 18:27:44,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 568.5) internal successors, (1137), 2 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:44,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:44,596 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:44,596 INFO L175 Difference]: Start difference. First operand has 560 places, 631 transitions, 1619 flow. Second operand 2 states and 1137 transitions. [2022-11-18 18:27:44,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 524 transitions, 1439 flow [2022-11-18 18:27:44,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 524 transitions, 1167 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:44,668 INFO L231 Difference]: Finished difference. Result has 560 places, 513 transitions, 1111 flow [2022-11-18 18:27:44,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1111, PETRI_PLACES=560, PETRI_TRANSITIONS=513} [2022-11-18 18:27:44,671 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 0 predicate places. [2022-11-18 18:27:44,672 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 513 transitions, 1111 flow [2022-11-18 18:27:44,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 507.5) internal successors, (1015), 2 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:44,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:44,672 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:44,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-11-18 18:27:44,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1657324443, now seen corresponding path program 1 times [2022-11-18 18:27:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:44,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699444398] [2022-11-18 18:27:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:44,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699444398] [2022-11-18 18:27:44,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699444398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:44,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:44,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:27:44,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45764161] [2022-11-18 18:27:44,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:44,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:27:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:27:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:27:44,704 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 631 [2022-11-18 18:27:44,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 513 transitions, 1111 flow. Second operand has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:44,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:44,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 631 [2022-11-18 18:27:44,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:45,126 INFO L130 PetriNetUnfolder]: 0/837 cut-off events. [2022-11-18 18:27:45,126 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-18 18:27:45,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 837 events. 0/837 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2767 event pairs, 0 based on Foata normal form. 0/820 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-11-18 18:27:45,128 INFO L137 encePairwiseOnDemand]: 628/631 looper letters, 26 selfloop transitions, 2 changer transitions 0/517 dead transitions. [2022-11-18 18:27:45,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 517 transitions, 1175 flow [2022-11-18 18:27:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1529 transitions. [2022-11-18 18:27:45,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8077126254622292 [2022-11-18 18:27:45,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1529 transitions. [2022-11-18 18:27:45,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1529 transitions. [2022-11-18 18:27:45,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:45,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1529 transitions. [2022-11-18 18:27:45,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:45,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:45,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:45,133 INFO L175 Difference]: Start difference. First operand has 560 places, 513 transitions, 1111 flow. Second operand 3 states and 1529 transitions. [2022-11-18 18:27:45,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 517 transitions, 1175 flow [2022-11-18 18:27:45,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 517 transitions, 1175 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:45,139 INFO L231 Difference]: Finished difference. Result has 552 places, 514 transitions, 1123 flow [2022-11-18 18:27:45,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1123, PETRI_PLACES=552, PETRI_TRANSITIONS=514} [2022-11-18 18:27:45,140 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, -8 predicate places. [2022-11-18 18:27:45,140 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 514 transitions, 1123 flow [2022-11-18 18:27:45,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:45,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:45,141 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-11-18 18:27:45,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1187491919, now seen corresponding path program 1 times [2022-11-18 18:27:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:45,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876412960] [2022-11-18 18:27:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:45,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:45,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876412960] [2022-11-18 18:27:45,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876412960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638273259] [2022-11-18 18:27:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:45,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:45,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:45,195 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:45,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-18 18:27:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:45,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:45,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:45,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638273259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:45,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:45,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:45,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193720631] [2022-11-18 18:27:45,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:45,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:45,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-18 18:27:45,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 514 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:45,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:45,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-18 18:27:45,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:46,058 INFO L130 PetriNetUnfolder]: 0/815 cut-off events. [2022-11-18 18:27:46,058 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 18:27:46,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 815 events. 0/815 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2634 event pairs, 0 based on Foata normal form. 2/817 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-11-18 18:27:46,060 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 27 selfloop transitions, 9 changer transitions 0/524 dead transitions. [2022-11-18 18:27:46,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 524 transitions, 1217 flow [2022-11-18 18:27:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4529 transitions. [2022-11-18 18:27:46,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7974995597816517 [2022-11-18 18:27:46,064 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4529 transitions. [2022-11-18 18:27:46,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4529 transitions. [2022-11-18 18:27:46,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:46,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4529 transitions. [2022-11-18 18:27:46,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 503.22222222222223) internal successors, (4529), 9 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:46,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:46,072 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:46,072 INFO L175 Difference]: Start difference. First operand has 552 places, 514 transitions, 1123 flow. Second operand 9 states and 4529 transitions. [2022-11-18 18:27:46,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 524 transitions, 1217 flow [2022-11-18 18:27:46,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 524 transitions, 1215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:46,078 INFO L231 Difference]: Finished difference. Result has 562 places, 520 transitions, 1171 flow [2022-11-18 18:27:46,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1171, PETRI_PLACES=562, PETRI_TRANSITIONS=520} [2022-11-18 18:27:46,079 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 2 predicate places. [2022-11-18 18:27:46,079 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 520 transitions, 1171 flow [2022-11-18 18:27:46,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:46,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:46,080 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:46,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-18 18:27:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-11-18 18:27:46,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash -60841094, now seen corresponding path program 1 times [2022-11-18 18:27:46,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:46,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952182142] [2022-11-18 18:27:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:46,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952182142] [2022-11-18 18:27:46,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952182142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046711090] [2022-11-18 18:27:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:46,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:46,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:46,386 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:46,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-18 18:27:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:46,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:46,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:46,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:46,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046711090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:46,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:46,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:46,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945098309] [2022-11-18 18:27:46,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:46,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:46,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:46,936 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-18 18:27:46,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 520 transitions, 1171 flow. Second operand has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:46,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:46,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-18 18:27:46,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:47,620 INFO L130 PetriNetUnfolder]: 0/771 cut-off events. [2022-11-18 18:27:47,620 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-11-18 18:27:47,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 771 events. 0/771 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2334 event pairs, 0 based on Foata normal form. 4/775 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-18 18:27:47,622 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 35 selfloop transitions, 21 changer transitions 0/544 dead transitions. [2022-11-18 18:27:47,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 544 transitions, 1391 flow [2022-11-18 18:27:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10539 transitions. [2022-11-18 18:27:47,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7953362010414309 [2022-11-18 18:27:47,633 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10539 transitions. [2022-11-18 18:27:47,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10539 transitions. [2022-11-18 18:27:47,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:47,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10539 transitions. [2022-11-18 18:27:47,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 501.85714285714283) internal successors, (10539), 21 states have internal predecessors, (10539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:47,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:47,658 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:47,658 INFO L175 Difference]: Start difference. First operand has 562 places, 520 transitions, 1171 flow. Second operand 21 states and 10539 transitions. [2022-11-18 18:27:47,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 544 transitions, 1391 flow [2022-11-18 18:27:47,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 544 transitions, 1377 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:47,666 INFO L231 Difference]: Finished difference. Result has 586 places, 533 transitions, 1295 flow [2022-11-18 18:27:47,667 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1295, PETRI_PLACES=586, PETRI_TRANSITIONS=533} [2022-11-18 18:27:47,667 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 26 predicate places. [2022-11-18 18:27:47,667 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 533 transitions, 1295 flow [2022-11-18 18:27:47,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:47,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:47,669 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:47,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-18 18:27:47,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-11-18 18:27:47,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1135685084, now seen corresponding path program 1 times [2022-11-18 18:27:47,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:47,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470461366] [2022-11-18 18:27:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:47,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:48,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470461366] [2022-11-18 18:27:48,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470461366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:48,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951781365] [2022-11-18 18:27:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:48,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:48,125 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:48,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-18 18:27:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:48,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:27:48,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:48,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:49,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951781365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:49,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:49,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:27:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219605598] [2022-11-18 18:27:49,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:49,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:27:49,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:27:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:27:49,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-18 18:27:49,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 533 transitions, 1295 flow. Second operand has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:49,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:49,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-18 18:27:49,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:50,224 INFO L130 PetriNetUnfolder]: 0/683 cut-off events. [2022-11-18 18:27:50,224 INFO L131 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-11-18 18:27:50,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 683 events. 0/683 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1758 event pairs, 0 based on Foata normal form. 8/691 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-18 18:27:50,226 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 51 selfloop transitions, 45 changer transitions 0/584 dead transitions. [2022-11-18 18:27:50,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 584 transitions, 1803 flow [2022-11-18 18:27:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:27:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:27:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22559 transitions. [2022-11-18 18:27:50,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7944708575453425 [2022-11-18 18:27:50,238 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22559 transitions. [2022-11-18 18:27:50,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22559 transitions. [2022-11-18 18:27:50,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:50,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22559 transitions. [2022-11-18 18:27:50,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 501.31111111111113) internal successors, (22559), 45 states have internal predecessors, (22559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:50,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:50,274 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:50,274 INFO L175 Difference]: Start difference. First operand has 586 places, 533 transitions, 1295 flow. Second operand 45 states and 22559 transitions. [2022-11-18 18:27:50,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 584 transitions, 1803 flow [2022-11-18 18:27:50,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 584 transitions, 1763 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:27:50,288 INFO L231 Difference]: Finished difference. Result has 633 places, 558 transitions, 1573 flow [2022-11-18 18:27:50,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1573, PETRI_PLACES=633, PETRI_TRANSITIONS=558} [2022-11-18 18:27:50,289 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 73 predicate places. [2022-11-18 18:27:50,289 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 558 transitions, 1573 flow [2022-11-18 18:27:50,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:50,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:50,293 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:50,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:50,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:50,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2110440752, now seen corresponding path program 1 times [2022-11-18 18:27:50,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:50,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598735432] [2022-11-18 18:27:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:50,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:51,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:51,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598735432] [2022-11-18 18:27:51,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598735432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:51,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66442299] [2022-11-18 18:27:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:51,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:51,488 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:51,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-18 18:27:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:51,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:27:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:52,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:53,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66442299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:53,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:53,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:27:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652027767] [2022-11-18 18:27:53,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:53,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:27:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:27:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:27:53,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-18 18:27:53,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 558 transitions, 1573 flow. Second operand has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:53,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:53,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-18 18:27:53,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:54,837 INFO L130 PetriNetUnfolder]: 0/650 cut-off events. [2022-11-18 18:27:54,838 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-11-18 18:27:54,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-18 18:27:54,839 INFO L137 encePairwiseOnDemand]: 626/631 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-11-18 18:27:54,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 584 transitions, 1967 flow [2022-11-18 18:27:54,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 18:27:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-18 18:27:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27055 transitions. [2022-11-18 18:27:54,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7940071608851323 [2022-11-18 18:27:54,853 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27055 transitions. [2022-11-18 18:27:54,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27055 transitions. [2022-11-18 18:27:54,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:54,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27055 transitions. [2022-11-18 18:27:54,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 501.01851851851853) internal successors, (27055), 54 states have internal predecessors, (27055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:54,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:54,899 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:54,899 INFO L175 Difference]: Start difference. First operand has 633 places, 558 transitions, 1573 flow. Second operand 54 states and 27055 transitions. [2022-11-18 18:27:54,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 584 transitions, 1967 flow [2022-11-18 18:27:54,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-11-18 18:27:54,912 INFO L231 Difference]: Finished difference. Result has 642 places, 553 transitions, 1559 flow [2022-11-18 18:27:54,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=642, PETRI_TRANSITIONS=553} [2022-11-18 18:27:54,913 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 82 predicate places. [2022-11-18 18:27:54,913 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 553 transitions, 1559 flow [2022-11-18 18:27:54,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:54,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:54,920 INFO L209 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:54,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-18 18:27:55,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:55,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1991946993, now seen corresponding path program 1 times [2022-11-18 18:27:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:55,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856335118] [2022-11-18 18:27:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:55,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:55,149 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:27:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:27:55,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:27:55,205 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:27:55,205 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:27:55,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:27:55,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-11-18 18:27:55,206 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:55,207 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:27:55,207 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-11-18 18:27:55,265 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:27:55,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 589 places, 664 transitions, 1724 flow [2022-11-18 18:27:55,806 INFO L130 PetriNetUnfolder]: 184/1307 cut-off events. [2022-11-18 18:27:55,806 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-11-18 18:27:55,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 1307 events. 184/1307 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4742 event pairs, 0 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 1415. Up to 38 conditions per place. [2022-11-18 18:27:55,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 589 places, 664 transitions, 1724 flow [2022-11-18 18:27:55,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 664 transitions, 1724 flow [2022-11-18 18:27:55,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:27:55,844 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:27:55,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:27:55,848 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:27:55,848 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:27:55,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:55,848 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:55,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1602613978, now seen corresponding path program 1 times [2022-11-18 18:27:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:55,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443783177] [2022-11-18 18:27:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:55,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:55,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:55,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443783177] [2022-11-18 18:27:55,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443783177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:55,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:55,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:27:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683431372] [2022-11-18 18:27:55,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:55,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:27:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:55,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:27:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:27:55,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 533 out of 664 [2022-11-18 18:27:55,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 664 transitions, 1724 flow. Second operand has 2 states, 2 states have (on average 533.5) internal successors, (1067), 2 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:55,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:55,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 533 of 664 [2022-11-18 18:27:55,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:56,330 INFO L130 PetriNetUnfolder]: 0/1104 cut-off events. [2022-11-18 18:27:56,330 INFO L131 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2022-11-18 18:27:56,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1349 conditions, 1104 events. 0/1104 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4358 event pairs, 0 based on Foata normal form. 1002/2068 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-18 18:27:56,333 INFO L137 encePairwiseOnDemand]: 552/664 looper letters, 18 selfloop transitions, 0 changer transitions 11/551 dead transitions. [2022-11-18 18:27:56,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 551 transitions, 1534 flow [2022-11-18 18:27:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:27:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:27:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1196 transitions. [2022-11-18 18:27:56,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9006024096385542 [2022-11-18 18:27:56,335 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1196 transitions. [2022-11-18 18:27:56,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1196 transitions. [2022-11-18 18:27:56,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:56,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1196 transitions. [2022-11-18 18:27:56,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 598.0) internal successors, (1196), 2 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 664.0) internal successors, (1992), 3 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,337 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 664.0) internal successors, (1992), 3 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,337 INFO L175 Difference]: Start difference. First operand has 589 places, 664 transitions, 1724 flow. Second operand 2 states and 1196 transitions. [2022-11-18 18:27:56,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 551 transitions, 1534 flow [2022-11-18 18:27:56,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 551 transitions, 1228 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:56,347 INFO L231 Difference]: Finished difference. Result has 589 places, 540 transitions, 1170 flow [2022-11-18 18:27:56,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1170, PETRI_PLACES=589, PETRI_TRANSITIONS=540} [2022-11-18 18:27:56,348 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 0 predicate places. [2022-11-18 18:27:56,348 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 540 transitions, 1170 flow [2022-11-18 18:27:56,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 533.5) internal successors, (1067), 2 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:56,349 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:56,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-11-18 18:27:56,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash -194337381, now seen corresponding path program 1 times [2022-11-18 18:27:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:56,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86711219] [2022-11-18 18:27:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:56,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:56,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:56,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86711219] [2022-11-18 18:27:56,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86711219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:27:56,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:27:56,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:27:56,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093027665] [2022-11-18 18:27:56,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:27:56,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:27:56,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:56,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:27:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:27:56,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 664 [2022-11-18 18:27:56,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 540 transitions, 1170 flow. Second operand has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:56,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 664 [2022-11-18 18:27:56,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:56,814 INFO L130 PetriNetUnfolder]: 0/884 cut-off events. [2022-11-18 18:27:56,814 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-18 18:27:56,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 884 events. 0/884 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2938 event pairs, 0 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-11-18 18:27:56,816 INFO L137 encePairwiseOnDemand]: 661/664 looper letters, 27 selfloop transitions, 2 changer transitions 0/544 dead transitions. [2022-11-18 18:27:56,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 544 transitions, 1236 flow [2022-11-18 18:27:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:27:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:27:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1608 transitions. [2022-11-18 18:27:56,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8072289156626506 [2022-11-18 18:27:56,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1608 transitions. [2022-11-18 18:27:56,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1608 transitions. [2022-11-18 18:27:56,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:56,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1608 transitions. [2022-11-18 18:27:56,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 536.0) internal successors, (1608), 3 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,823 INFO L175 Difference]: Start difference. First operand has 589 places, 540 transitions, 1170 flow. Second operand 3 states and 1608 transitions. [2022-11-18 18:27:56,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 544 transitions, 1236 flow [2022-11-18 18:27:56,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 544 transitions, 1236 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:27:56,833 INFO L231 Difference]: Finished difference. Result has 581 places, 541 transitions, 1182 flow [2022-11-18 18:27:56,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=581, PETRI_TRANSITIONS=541} [2022-11-18 18:27:56,835 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, -8 predicate places. [2022-11-18 18:27:56,835 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 541 transitions, 1182 flow [2022-11-18 18:27:56,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:56,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:56,836 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:56,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-11-18 18:27:56,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1715269999, now seen corresponding path program 1 times [2022-11-18 18:27:56,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:56,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704281321] [2022-11-18 18:27:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:56,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:56,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704281321] [2022-11-18 18:27:56,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704281321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699435170] [2022-11-18 18:27:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:56,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:56,906 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:56,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-18 18:27:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:27:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:57,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:57,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699435170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:57,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:57,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:27:57,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747886187] [2022-11-18 18:27:57,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:57,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:27:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:27:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:27:57,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-18 18:27:57,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 541 transitions, 1182 flow. Second operand has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:57,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:57,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-18 18:27:57,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:58,103 INFO L130 PetriNetUnfolder]: 0/862 cut-off events. [2022-11-18 18:27:58,103 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-18 18:27:58,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 862 events. 0/862 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2806 event pairs, 0 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-11-18 18:27:58,105 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 28 selfloop transitions, 9 changer transitions 0/551 dead transitions. [2022-11-18 18:27:58,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 551 transitions, 1278 flow [2022-11-18 18:27:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:27:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:27:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4764 transitions. [2022-11-18 18:27:58,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7971887550200804 [2022-11-18 18:27:58,108 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4764 transitions. [2022-11-18 18:27:58,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4764 transitions. [2022-11-18 18:27:58,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:58,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4764 transitions. [2022-11-18 18:27:58,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 529.3333333333334) internal successors, (4764), 9 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:58,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:58,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:58,117 INFO L175 Difference]: Start difference. First operand has 581 places, 541 transitions, 1182 flow. Second operand 9 states and 4764 transitions. [2022-11-18 18:27:58,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 551 transitions, 1278 flow [2022-11-18 18:27:58,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 551 transitions, 1276 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:58,123 INFO L231 Difference]: Finished difference. Result has 591 places, 547 transitions, 1230 flow [2022-11-18 18:27:58,123 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1230, PETRI_PLACES=591, PETRI_TRANSITIONS=547} [2022-11-18 18:27:58,124 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 2 predicate places. [2022-11-18 18:27:58,124 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 547 transitions, 1230 flow [2022-11-18 18:27:58,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:58,125 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:58,125 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:58,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-18 18:27:58,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:58,325 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:27:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:27:58,326 INFO L85 PathProgramCache]: Analyzing trace with hash -178230566, now seen corresponding path program 1 times [2022-11-18 18:27:58,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:27:58,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993639774] [2022-11-18 18:27:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:58,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:27:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:58,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:27:58,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993639774] [2022-11-18 18:27:58,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993639774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:27:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418332847] [2022-11-18 18:27:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:27:58,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:27:58,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:27:58,428 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:27:58,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-18 18:27:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:27:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:27:58,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:27:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:59,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:27:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:27:59,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418332847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:27:59,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:27:59,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:27:59,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152897153] [2022-11-18 18:27:59,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:27:59,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:27:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:27:59,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:27:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:27:59,205 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-18 18:27:59,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 547 transitions, 1230 flow. Second operand has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:59,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:27:59,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-18 18:27:59,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:27:59,896 INFO L130 PetriNetUnfolder]: 0/818 cut-off events. [2022-11-18 18:27:59,897 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-18 18:27:59,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 818 events. 0/818 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2504 event pairs, 0 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-18 18:27:59,898 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 36 selfloop transitions, 21 changer transitions 0/571 dead transitions. [2022-11-18 18:27:59,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 571 transitions, 1452 flow [2022-11-18 18:27:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:27:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:27:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11086 transitions. [2022-11-18 18:27:59,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7950372920252439 [2022-11-18 18:27:59,905 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11086 transitions. [2022-11-18 18:27:59,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11086 transitions. [2022-11-18 18:27:59,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:27:59,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11086 transitions. [2022-11-18 18:27:59,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 527.9047619047619) internal successors, (11086), 21 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:59,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:59,925 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:59,925 INFO L175 Difference]: Start difference. First operand has 591 places, 547 transitions, 1230 flow. Second operand 21 states and 11086 transitions. [2022-11-18 18:27:59,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 571 transitions, 1452 flow [2022-11-18 18:27:59,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 571 transitions, 1438 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:27:59,933 INFO L231 Difference]: Finished difference. Result has 615 places, 560 transitions, 1354 flow [2022-11-18 18:27:59,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1354, PETRI_PLACES=615, PETRI_TRANSITIONS=560} [2022-11-18 18:27:59,934 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 26 predicate places. [2022-11-18 18:27:59,934 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 560 transitions, 1354 flow [2022-11-18 18:27:59,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:27:59,936 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:27:59,936 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:27:59,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-18 18:28:00,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:00,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:28:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1251221948, now seen corresponding path program 1 times [2022-11-18 18:28:00,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:00,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576654355] [2022-11-18 18:28:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:00,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:00,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:00,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576654355] [2022-11-18 18:28:00,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576654355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:00,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796738747] [2022-11-18 18:28:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:00,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:00,442 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:00,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-18 18:28:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:00,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:28:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:01,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:01,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796738747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:01,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:28:01,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:28:01,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915587849] [2022-11-18 18:28:01,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:28:01,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:28:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:28:01,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-18 18:28:01,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 560 transitions, 1354 flow. Second operand has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:01,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:28:01,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-18 18:28:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:28:02,658 INFO L130 PetriNetUnfolder]: 0/730 cut-off events. [2022-11-18 18:28:02,658 INFO L131 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-11-18 18:28:02,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 730 events. 0/730 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1925 event pairs, 0 based on Foata normal form. 8/738 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-11-18 18:28:02,660 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 52 selfloop transitions, 45 changer transitions 0/611 dead transitions. [2022-11-18 18:28:02,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 611 transitions, 1864 flow [2022-11-18 18:28:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:28:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:28:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23730 transitions. [2022-11-18 18:28:02,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7941767068273092 [2022-11-18 18:28:02,681 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23730 transitions. [2022-11-18 18:28:02,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23730 transitions. [2022-11-18 18:28:02,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:28:02,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23730 transitions. [2022-11-18 18:28:02,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 527.3333333333334) internal successors, (23730), 45 states have internal predecessors, (23730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:02,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:02,739 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:02,739 INFO L175 Difference]: Start difference. First operand has 615 places, 560 transitions, 1354 flow. Second operand 45 states and 23730 transitions. [2022-11-18 18:28:02,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 611 transitions, 1864 flow [2022-11-18 18:28:02,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 611 transitions, 1824 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:28:02,750 INFO L231 Difference]: Finished difference. Result has 662 places, 585 transitions, 1632 flow [2022-11-18 18:28:02,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1632, PETRI_PLACES=662, PETRI_TRANSITIONS=585} [2022-11-18 18:28:02,751 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 73 predicate places. [2022-11-18 18:28:02,751 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 585 transitions, 1632 flow [2022-11-18 18:28:02,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:02,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:28:02,753 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:02,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-18 18:28:02,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:02,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:28:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1976108976, now seen corresponding path program 1 times [2022-11-18 18:28:02,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:02,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652103671] [2022-11-18 18:28:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:02,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:03,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652103671] [2022-11-18 18:28:03,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652103671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087552281] [2022-11-18 18:28:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:03,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:03,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:03,875 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:03,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-18 18:28:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:04,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:28:04,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:04,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:05,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087552281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:05,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:28:05,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:28:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586528736] [2022-11-18 18:28:05,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:05,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:28:05,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:28:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:28:05,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-18 18:28:05,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 585 transitions, 1632 flow. Second operand has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:05,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:28:05,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-18 18:28:05,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:28:07,114 INFO L130 PetriNetUnfolder]: 0/686 cut-off events. [2022-11-18 18:28:07,114 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-18 18:28:07,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-11-18 18:28:07,115 INFO L137 encePairwiseOnDemand]: 659/664 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-11-18 18:28:07,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 616 transitions, 2082 flow [2022-11-18 18:28:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-18 18:28:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-18 18:28:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30041 transitions. [2022-11-18 18:28:07,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7937275417459311 [2022-11-18 18:28:07,131 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30041 transitions. [2022-11-18 18:28:07,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30041 transitions. [2022-11-18 18:28:07,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:28:07,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30041 transitions. [2022-11-18 18:28:07,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 527.0350877192982) internal successors, (30041), 57 states have internal predecessors, (30041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:07,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:07,179 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:07,180 INFO L175 Difference]: Start difference. First operand has 662 places, 585 transitions, 1632 flow. Second operand 57 states and 30041 transitions. [2022-11-18 18:28:07,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 616 transitions, 2082 flow [2022-11-18 18:28:07,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-11-18 18:28:07,192 INFO L231 Difference]: Finished difference. Result has 674 places, 583 transitions, 1647 flow [2022-11-18 18:28:07,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=674, PETRI_TRANSITIONS=583} [2022-11-18 18:28:07,192 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 85 predicate places. [2022-11-18 18:28:07,193 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 583 transitions, 1647 flow [2022-11-18 18:28:07,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:07,199 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:28:07,200 INFO L209 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:07,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-18 18:28:07,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-11-18 18:28:07,400 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:28:07,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1386030580, now seen corresponding path program 1 times [2022-11-18 18:28:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:07,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012504864] [2022-11-18 18:28:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:07,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:28:07,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:28:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:28:07,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:28:07,495 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:28:07,495 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:28:07,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:28:07,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-11-18 18:28:07,496 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:07,497 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:28:07,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-11-18 18:28:07,563 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:28:07,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 618 places, 697 transitions, 1831 flow [2022-11-18 18:28:08,281 INFO L130 PetriNetUnfolder]: 194/1376 cut-off events. [2022-11-18 18:28:08,282 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-11-18 18:28:08,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 1376 events. 194/1376 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4999 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1505. Up to 40 conditions per place. [2022-11-18 18:28:08,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 618 places, 697 transitions, 1831 flow [2022-11-18 18:28:08,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 618 places, 697 transitions, 1831 flow [2022-11-18 18:28:08,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:28:08,342 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:28:08,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:28:08,348 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:28:08,348 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:28:08,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:28:08,349 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:08,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:28:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2119862374, now seen corresponding path program 1 times [2022-11-18 18:28:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:08,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690939324] [2022-11-18 18:28:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:08,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:08,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690939324] [2022-11-18 18:28:08,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690939324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:08,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:08,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:28:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425989448] [2022-11-18 18:28:08,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:08,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:28:08,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:28:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:28:08,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 559 out of 697 [2022-11-18 18:28:08,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 697 transitions, 1831 flow. Second operand has 2 states, 2 states have (on average 559.5) internal successors, (1119), 2 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:08,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:28:08,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 559 of 697 [2022-11-18 18:28:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:28:08,909 INFO L130 PetriNetUnfolder]: 0/1162 cut-off events. [2022-11-18 18:28:08,910 INFO L131 PetriNetUnfolder]: For 1501/1501 co-relation queries the response was YES. [2022-11-18 18:28:08,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1430 conditions, 1162 events. 0/1162 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4605 event pairs, 0 based on Foata normal form. 1114/2236 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2022-11-18 18:28:08,912 INFO L137 encePairwiseOnDemand]: 579/697 looper letters, 19 selfloop transitions, 0 changer transitions 11/578 dead transitions. [2022-11-18 18:28:08,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 578 transitions, 1631 flow [2022-11-18 18:28:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:28:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:28:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1255 transitions. [2022-11-18 18:28:08,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.900286944045911 [2022-11-18 18:28:08,914 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1255 transitions. [2022-11-18 18:28:08,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1255 transitions. [2022-11-18 18:28:08,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:28:08,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1255 transitions. [2022-11-18 18:28:08,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 627.5) internal successors, (1255), 2 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:08,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 697.0) internal successors, (2091), 3 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:08,915 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 697.0) internal successors, (2091), 3 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:08,916 INFO L175 Difference]: Start difference. First operand has 618 places, 697 transitions, 1831 flow. Second operand 2 states and 1255 transitions. [2022-11-18 18:28:08,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 578 transitions, 1631 flow [2022-11-18 18:28:08,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 578 transitions, 1289 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-11-18 18:28:08,923 INFO L231 Difference]: Finished difference. Result has 618 places, 567 transitions, 1229 flow [2022-11-18 18:28:08,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1229, PETRI_PLACES=618, PETRI_TRANSITIONS=567} [2022-11-18 18:28:08,924 INFO L288 CegarLoopForPetriNet]: 618 programPoint places, 0 predicate places. [2022-11-18 18:28:08,924 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 567 transitions, 1229 flow [2022-11-18 18:28:08,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 559.5) internal successors, (1119), 2 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:08,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:28:08,924 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:08,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-11-18 18:28:08,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:28:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash 378153563, now seen corresponding path program 1 times [2022-11-18 18:28:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:08,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287109510] [2022-11-18 18:28:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:08,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:08,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287109510] [2022-11-18 18:28:08,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287109510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:08,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:08,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:28:08,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268537597] [2022-11-18 18:28:08,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:08,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:08,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:08,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 552 out of 697 [2022-11-18 18:28:08,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 567 transitions, 1229 flow. Second operand has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:08,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:28:08,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 552 of 697 [2022-11-18 18:28:08,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:28:09,445 INFO L130 PetriNetUnfolder]: 0/931 cut-off events. [2022-11-18 18:28:09,445 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-18 18:28:09,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 931 events. 0/931 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3109 event pairs, 0 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-11-18 18:28:09,447 INFO L137 encePairwiseOnDemand]: 694/697 looper letters, 28 selfloop transitions, 2 changer transitions 0/571 dead transitions. [2022-11-18 18:28:09,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 571 transitions, 1297 flow [2022-11-18 18:28:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:28:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1687 transitions. [2022-11-18 18:28:09,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8067910090865614 [2022-11-18 18:28:09,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1687 transitions. [2022-11-18 18:28:09,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1687 transitions. [2022-11-18 18:28:09,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:28:09,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1687 transitions. [2022-11-18 18:28:09,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 562.3333333333334) internal successors, (1687), 3 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:09,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:09,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:09,452 INFO L175 Difference]: Start difference. First operand has 618 places, 567 transitions, 1229 flow. Second operand 3 states and 1687 transitions. [2022-11-18 18:28:09,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 571 transitions, 1297 flow [2022-11-18 18:28:09,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 571 transitions, 1297 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:28:09,460 INFO L231 Difference]: Finished difference. Result has 610 places, 568 transitions, 1241 flow [2022-11-18 18:28:09,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1241, PETRI_PLACES=610, PETRI_TRANSITIONS=568} [2022-11-18 18:28:09,461 INFO L288 CegarLoopForPetriNet]: 618 programPoint places, -8 predicate places. [2022-11-18 18:28:09,461 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 568 transitions, 1241 flow [2022-11-18 18:28:09,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:09,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:28:09,462 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:09,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-11-18 18:28:09,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:28:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash -859690513, now seen corresponding path program 1 times [2022-11-18 18:28:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:09,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511143250] [2022-11-18 18:28:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:09,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:09,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:09,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511143250] [2022-11-18 18:28:09,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511143250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141438078] [2022-11-18 18:28:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:09,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:09,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:09,514 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:09,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-18 18:28:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:28:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:10,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:10,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141438078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:10,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:28:10,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:28:10,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940521742] [2022-11-18 18:28:10,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:10,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:28:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:28:10,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:28:10,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-11-18 18:28:10,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 568 transitions, 1241 flow. Second operand has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:10,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:28:10,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-11-18 18:28:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:28:10,688 INFO L130 PetriNetUnfolder]: 0/909 cut-off events. [2022-11-18 18:28:10,688 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-18 18:28:10,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 909 events. 0/909 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2976 event pairs, 0 based on Foata normal form. 2/911 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-18 18:28:10,690 INFO L137 encePairwiseOnDemand]: 691/697 looper letters, 29 selfloop transitions, 9 changer transitions 0/578 dead transitions. [2022-11-18 18:28:10,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 578 transitions, 1339 flow [2022-11-18 18:28:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:28:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:28:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4999 transitions. [2022-11-18 18:28:10,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7969073808385143 [2022-11-18 18:28:10,694 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4999 transitions. [2022-11-18 18:28:10,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4999 transitions. [2022-11-18 18:28:10,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:28:10,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4999 transitions. [2022-11-18 18:28:10,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 555.4444444444445) internal successors, (4999), 9 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:10,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:10,702 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:10,702 INFO L175 Difference]: Start difference. First operand has 610 places, 568 transitions, 1241 flow. Second operand 9 states and 4999 transitions. [2022-11-18 18:28:10,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 578 transitions, 1339 flow [2022-11-18 18:28:10,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 578 transitions, 1337 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:28:10,710 INFO L231 Difference]: Finished difference. Result has 620 places, 574 transitions, 1289 flow [2022-11-18 18:28:10,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=620, PETRI_TRANSITIONS=574} [2022-11-18 18:28:10,711 INFO L288 CegarLoopForPetriNet]: 618 programPoint places, 2 predicate places. [2022-11-18 18:28:10,711 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 574 transitions, 1289 flow [2022-11-18 18:28:10,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:10,712 INFO L201 CegarLoopForPetriNet]: Found error trace WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-18 18:31:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash -382215270, now seen corresponding path program 1 times [2022-11-18 18:31:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:30,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436964623] [2022-11-18 18:31:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:30,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:30,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436964623] [2022-11-18 18:31:30,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436964623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367234429] [2022-11-18 18:31:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:30,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:30,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:30,191 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:30,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-18 18:31:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:31,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:31:31,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:31,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:31,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367234429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:31,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:31,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:31:31,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960443861] [2022-11-18 18:31:31,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:31,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:31:31,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:31,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:31:31,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:31:31,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-11-18 18:31:31,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 898 transitions, 1997 flow. Second operand has 18 states, 18 states have (on average 865.6111111111111) internal successors, (15581), 18 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:31,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:31,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-11-18 18:31:31,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:32,799 INFO L130 PetriNetUnfolder]: 0/1429 cut-off events. [2022-11-18 18:31:32,800 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-11-18 18:31:32,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 1429 events. 0/1429 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4736 event pairs, 0 based on Foata normal form. 4/1433 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-11-18 18:31:32,803 INFO L137 encePairwiseOnDemand]: 1087/1093 looper letters, 49 selfloop transitions, 21 changer transitions 0/922 dead transitions. [2022-11-18 18:31:32,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 988 places, 922 transitions, 2245 flow [2022-11-18 18:31:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:31:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:31:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18197 transitions. [2022-11-18 18:31:32,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7927939702871084 [2022-11-18 18:31:32,812 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18197 transitions. [2022-11-18 18:31:32,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18197 transitions. [2022-11-18 18:31:32,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:32,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18197 transitions. [2022-11-18 18:31:32,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 866.5238095238095) internal successors, (18197), 21 states have internal predecessors, (18197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:32,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1093.0) internal successors, (24046), 22 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:32,838 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1093.0) internal successors, (24046), 22 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:32,838 INFO L175 Difference]: Start difference. First operand has 968 places, 898 transitions, 1997 flow. Second operand 21 states and 18197 transitions. [2022-11-18 18:31:32,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 988 places, 922 transitions, 2245 flow [2022-11-18 18:31:32,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 987 places, 922 transitions, 2231 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:32,848 INFO L231 Difference]: Finished difference. Result has 992 places, 911 transitions, 2121 flow [2022-11-18 18:31:32,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=967, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2121, PETRI_PLACES=992, PETRI_TRANSITIONS=911} [2022-11-18 18:31:32,849 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, 26 predicate places. [2022-11-18 18:31:32,849 INFO L495 AbstractCegarLoop]: Abstraction has has 992 places, 911 transitions, 2121 flow [2022-11-18 18:31:32,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 865.6111111111111) internal successors, (15581), 18 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:32,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:32,851 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:32,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:33,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:33,051 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:33,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1420724100, now seen corresponding path program 1 times [2022-11-18 18:31:33,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:33,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710238504] [2022-11-18 18:31:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:33,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:33,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710238504] [2022-11-18 18:31:33,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710238504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234602880] [2022-11-18 18:31:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:33,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:33,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:33,259 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:33,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-18 18:31:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:34,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:31:34,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:34,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234602880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:34,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:34,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:31:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082494737] [2022-11-18 18:31:34,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:34,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:31:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:31:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:31:34,759 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-11-18 18:31:34,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 992 places, 911 transitions, 2121 flow. Second operand has 34 states, 34 states have (on average 865.7941176470588) internal successors, (29437), 34 states have internal predecessors, (29437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:34,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:34,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-11-18 18:31:34,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:36,596 INFO L130 PetriNetUnfolder]: 0/1341 cut-off events. [2022-11-18 18:31:36,596 INFO L131 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-11-18 18:31:36,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1341 events. 0/1341 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4138 event pairs, 0 based on Foata normal form. 8/1349 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-18 18:31:36,598 INFO L137 encePairwiseOnDemand]: 1087/1093 looper letters, 65 selfloop transitions, 45 changer transitions 0/962 dead transitions. [2022-11-18 18:31:36,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1036 places, 962 transitions, 2657 flow [2022-11-18 18:31:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:31:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:31:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 38953 transitions. [2022-11-18 18:31:36,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7919690962691878 [2022-11-18 18:31:36,632 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 38953 transitions. [2022-11-18 18:31:36,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 38953 transitions. [2022-11-18 18:31:36,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:36,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 38953 transitions. [2022-11-18 18:31:36,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 865.6222222222223) internal successors, (38953), 45 states have internal predecessors, (38953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:36,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1093.0) internal successors, (50278), 46 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:36,718 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1093.0) internal successors, (50278), 46 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:36,719 INFO L175 Difference]: Start difference. First operand has 992 places, 911 transitions, 2121 flow. Second operand 45 states and 38953 transitions. [2022-11-18 18:31:36,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1036 places, 962 transitions, 2657 flow [2022-11-18 18:31:36,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1030 places, 962 transitions, 2617 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:31:36,737 INFO L231 Difference]: Finished difference. Result has 1039 places, 936 transitions, 2399 flow [2022-11-18 18:31:36,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2399, PETRI_PLACES=1039, PETRI_TRANSITIONS=936} [2022-11-18 18:31:36,738 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, 73 predicate places. [2022-11-18 18:31:36,738 INFO L495 AbstractCegarLoop]: Abstraction has has 1039 places, 936 transitions, 2399 flow [2022-11-18 18:31:36,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 865.7941176470588) internal successors, (29437), 34 states have internal predecessors, (29437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:36,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:36,742 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:36,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:36,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-11-18 18:31:36,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:36,951 INFO L85 PathProgramCache]: Analyzing trace with hash -13096336, now seen corresponding path program 1 times [2022-11-18 18:31:36,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:36,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455983172] [2022-11-18 18:31:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:36,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:37,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:37,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455983172] [2022-11-18 18:31:37,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455983172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:37,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580913684] [2022-11-18 18:31:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:37,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:37,641 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:37,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-18 18:31:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:31:38,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:39,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:40,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580913684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:40,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:40,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:31:40,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531478185] [2022-11-18 18:31:40,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:40,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:31:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:40,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:31:40,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:31:40,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-11-18 18:31:40,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1039 places, 936 transitions, 2399 flow. Second operand has 66 states, 66 states have (on average 865.8939393939394) internal successors, (57149), 66 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:40,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:40,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-11-18 18:31:40,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:43,548 INFO L130 PetriNetUnfolder]: 0/1165 cut-off events. [2022-11-18 18:31:43,548 INFO L131 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-11-18 18:31:43,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 1165 events. 0/1165 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2986 event pairs, 0 based on Foata normal form. 16/1181 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2022-11-18 18:31:43,549 INFO L137 encePairwiseOnDemand]: 1087/1093 looper letters, 97 selfloop transitions, 93 changer transitions 0/1042 dead transitions. [2022-11-18 18:31:43,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 1042 transitions, 3627 flow [2022-11-18 18:31:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:31:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:31:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80465 transitions. [2022-11-18 18:31:43,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791596572519159 [2022-11-18 18:31:43,582 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80465 transitions. [2022-11-18 18:31:43,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80465 transitions. [2022-11-18 18:31:43,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:43,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80465 transitions. [2022-11-18 18:31:43,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 865.2150537634409) internal successors, (80465), 93 states have internal predecessors, (80465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:43,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1093.0) internal successors, (102742), 94 states have internal predecessors, (102742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:43,696 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1093.0) internal successors, (102742), 94 states have internal predecessors, (102742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:43,696 INFO L175 Difference]: Start difference. First operand has 1039 places, 936 transitions, 2399 flow. Second operand 93 states and 80465 transitions. [2022-11-18 18:31:43,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 1042 transitions, 3627 flow [2022-11-18 18:31:43,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1113 places, 1042 transitions, 3539 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:31:43,715 INFO L231 Difference]: Finished difference. Result has 1130 places, 985 transitions, 3033 flow [2022-11-18 18:31:43,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=1021, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3033, PETRI_PLACES=1130, PETRI_TRANSITIONS=985} [2022-11-18 18:31:43,716 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, 164 predicate places. [2022-11-18 18:31:43,716 INFO L495 AbstractCegarLoop]: Abstraction has has 1130 places, 985 transitions, 3033 flow [2022-11-18 18:31:43,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 865.8939393939394) internal successors, (57149), 66 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:43,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:43,721 INFO L209 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:43,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-18 18:31:43,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-11-18 18:31:43,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1442706320, now seen corresponding path program 1 times [2022-11-18 18:31:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:43,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342483535] [2022-11-18 18:31:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:43,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:43,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:31:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:31:44,043 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:31:44,043 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:31:44,043 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:31:44,043 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:31:44,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-11-18 18:31:44,044 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:44,044 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:31:44,044 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-11-18 18:31:44,127 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:31:44,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 995 places, 1126 transitions, 3404 flow [2022-11-18 18:31:45,599 INFO L130 PetriNetUnfolder]: 324/2273 cut-off events. [2022-11-18 18:31:45,599 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-11-18 18:31:45,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 2273 events. 324/2273 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8307 event pairs, 0 based on Foata normal form. 0/1883 useless extension candidates. Maximal degree in co-relation 2766. Up to 66 conditions per place. [2022-11-18 18:31:45,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 995 places, 1126 transitions, 3404 flow [2022-11-18 18:31:45,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 995 places, 1126 transitions, 3404 flow [2022-11-18 18:31:45,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:31:45,787 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:31:45,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:31:45,794 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:31:45,794 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:31:45,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:45,795 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:45,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1712844902, now seen corresponding path program 1 times [2022-11-18 18:31:45,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:45,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932407802] [2022-11-18 18:31:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:45,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:45,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932407802] [2022-11-18 18:31:45,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932407802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:45,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:45,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:31:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484836059] [2022-11-18 18:31:45,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:31:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:31:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:31:45,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 897 out of 1126 [2022-11-18 18:31:45,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 1126 transitions, 3404 flow. Second operand has 2 states, 2 states have (on average 897.5) internal successors, (1795), 2 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:45,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:45,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 897 of 1126 [2022-11-18 18:31:45,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:47,436 INFO L130 PetriNetUnfolder]: 0/1916 cut-off events. [2022-11-18 18:31:47,437 INFO L131 PetriNetUnfolder]: For 6480/6480 co-relation queries the response was YES. [2022-11-18 18:31:47,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 1916 events. 0/1916 cut-off events. For 6480/6480 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 7816 event pairs, 0 based on Foata normal form. 3116/4966 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-11-18 18:31:47,440 INFO L137 encePairwiseOnDemand]: 930/1126 looper letters, 32 selfloop transitions, 0 changer transitions 11/929 dead transitions. [2022-11-18 18:31:47,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 929 transitions, 3074 flow [2022-11-18 18:31:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:31:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:31:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2022 transitions. [2022-11-18 18:31:47,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8978685612788633 [2022-11-18 18:31:47,442 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2022 transitions. [2022-11-18 18:31:47,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2022 transitions. [2022-11-18 18:31:47,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:47,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2022 transitions. [2022-11-18 18:31:47,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1011.0) internal successors, (2022), 2 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1126.0) internal successors, (3378), 3 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,446 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1126.0) internal successors, (3378), 3 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,446 INFO L175 Difference]: Start difference. First operand has 995 places, 1126 transitions, 3404 flow. Second operand 2 states and 2022 transitions. [2022-11-18 18:31:47,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 929 transitions, 3074 flow [2022-11-18 18:31:47,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 995 places, 929 transitions, 2082 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-11-18 18:31:47,469 INFO L231 Difference]: Finished difference. Result has 995 places, 918 transitions, 1996 flow [2022-11-18 18:31:47,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=994, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1996, PETRI_PLACES=995, PETRI_TRANSITIONS=918} [2022-11-18 18:31:47,469 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 0 predicate places. [2022-11-18 18:31:47,469 INFO L495 AbstractCegarLoop]: Abstraction has has 995 places, 918 transitions, 1996 flow [2022-11-18 18:31:47,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 897.5) internal successors, (1795), 2 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:47,470 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-11-18 18:31:47,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash 785171035, now seen corresponding path program 1 times [2022-11-18 18:31:47,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:47,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2532161] [2022-11-18 18:31:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:47,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:47,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:47,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2532161] [2022-11-18 18:31:47,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2532161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:47,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:47,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:31:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309865552] [2022-11-18 18:31:47,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:47,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:31:47,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:31:47,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:31:47,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 890 out of 1126 [2022-11-18 18:31:47,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 918 transitions, 1996 flow. Second operand has 3 states, 3 states have (on average 891.0) internal successors, (2673), 3 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:47,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 890 of 1126 [2022-11-18 18:31:47,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:48,987 INFO L130 PetriNetUnfolder]: 0/1542 cut-off events. [2022-11-18 18:31:48,988 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-18 18:31:48,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 1542 events. 0/1542 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5332 event pairs, 0 based on Foata normal form. 0/1510 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2022-11-18 18:31:48,991 INFO L137 encePairwiseOnDemand]: 1123/1126 looper letters, 41 selfloop transitions, 2 changer transitions 0/922 dead transitions. [2022-11-18 18:31:48,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 986 places, 922 transitions, 2090 flow [2022-11-18 18:31:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:31:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:31:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2714 transitions. [2022-11-18 18:31:48,993 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8034339846062759 [2022-11-18 18:31:48,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2714 transitions. [2022-11-18 18:31:48,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2714 transitions. [2022-11-18 18:31:48,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:48,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2714 transitions. [2022-11-18 18:31:48,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 904.6666666666666) internal successors, (2714), 3 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:48,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 4 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:48,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 4 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:48,998 INFO L175 Difference]: Start difference. First operand has 995 places, 918 transitions, 1996 flow. Second operand 3 states and 2714 transitions. [2022-11-18 18:31:48,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 986 places, 922 transitions, 2090 flow [2022-11-18 18:31:49,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 986 places, 922 transitions, 2090 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:31:49,009 INFO L231 Difference]: Finished difference. Result has 987 places, 919 transitions, 2008 flow [2022-11-18 18:31:49,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=984, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2008, PETRI_PLACES=987, PETRI_TRANSITIONS=919} [2022-11-18 18:31:49,010 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, -8 predicate places. [2022-11-18 18:31:49,010 INFO L495 AbstractCegarLoop]: Abstraction has has 987 places, 919 transitions, 2008 flow [2022-11-18 18:31:49,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 891.0) internal successors, (2673), 3 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:49,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:49,011 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:49,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-11-18 18:31:49,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1144190863, now seen corresponding path program 1 times [2022-11-18 18:31:49,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:49,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576837052] [2022-11-18 18:31:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:49,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:49,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576837052] [2022-11-18 18:31:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576837052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925321257] [2022-11-18 18:31:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:49,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:49,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:49,056 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:49,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-18 18:31:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:31:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:50,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:50,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925321257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:50,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:50,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:31:50,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489567653] [2022-11-18 18:31:50,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:50,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:31:50,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:31:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:31:50,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-18 18:31:50,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 919 transitions, 2008 flow. Second operand has 10 states, 10 states have (on average 891.3) internal successors, (8913), 10 states have internal predecessors, (8913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:50,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:50,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-18 18:31:50,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:51,617 INFO L130 PetriNetUnfolder]: 0/1520 cut-off events. [2022-11-18 18:31:51,617 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-18 18:31:51,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 1520 events. 0/1520 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5172 event pairs, 0 based on Foata normal form. 2/1522 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-11-18 18:31:51,619 INFO L137 encePairwiseOnDemand]: 1120/1126 looper letters, 42 selfloop transitions, 9 changer transitions 0/929 dead transitions. [2022-11-18 18:31:51,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 929 transitions, 2132 flow [2022-11-18 18:31:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:31:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:31:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8054 transitions. [2022-11-18 18:31:51,624 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7947503453720149 [2022-11-18 18:31:51,624 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8054 transitions. [2022-11-18 18:31:51,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8054 transitions. [2022-11-18 18:31:51,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:51,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8054 transitions. [2022-11-18 18:31:51,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 894.8888888888889) internal successors, (8054), 9 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:51,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1126.0) internal successors, (11260), 10 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:51,636 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1126.0) internal successors, (11260), 10 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:51,636 INFO L175 Difference]: Start difference. First operand has 987 places, 919 transitions, 2008 flow. Second operand 9 states and 8054 transitions. [2022-11-18 18:31:51,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 929 transitions, 2132 flow [2022-11-18 18:31:51,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 994 places, 929 transitions, 2130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:51,644 INFO L231 Difference]: Finished difference. Result has 997 places, 925 transitions, 2056 flow [2022-11-18 18:31:51,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=997, PETRI_TRANSITIONS=925} [2022-11-18 18:31:51,645 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 2 predicate places. [2022-11-18 18:31:51,645 INFO L495 AbstractCegarLoop]: Abstraction has has 997 places, 925 transitions, 2056 flow [2022-11-18 18:31:51,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 891.3) internal successors, (8913), 10 states have internal predecessors, (8913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:51,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:51,646 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:51,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:51,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:51,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:51,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1686084538, now seen corresponding path program 1 times [2022-11-18 18:31:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:51,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995822072] [2022-11-18 18:31:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:51,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:51,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995822072] [2022-11-18 18:31:51,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995822072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:51,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015699253] [2022-11-18 18:31:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:51,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:51,925 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:51,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-18 18:31:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:53,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:31:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:53,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:53,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015699253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:53,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:53,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:31:53,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433228562] [2022-11-18 18:31:53,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:53,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:31:53,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:31:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:31:53,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-18 18:31:53,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 925 transitions, 2056 flow. Second operand has 18 states, 18 states have (on average 891.6111111111111) internal successors, (16049), 18 states have internal predecessors, (16049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:53,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:53,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-18 18:31:53,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:54,638 INFO L130 PetriNetUnfolder]: 0/1476 cut-off events. [2022-11-18 18:31:54,638 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-11-18 18:31:54,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2136 conditions, 1476 events. 0/1476 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4910 event pairs, 0 based on Foata normal form. 4/1480 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-11-18 18:31:54,641 INFO L137 encePairwiseOnDemand]: 1120/1126 looper letters, 50 selfloop transitions, 21 changer transitions 0/949 dead transitions. [2022-11-18 18:31:54,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1017 places, 949 transitions, 2306 flow [2022-11-18 18:31:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:31:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:31:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18744 transitions. [2022-11-18 18:31:54,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7926922100989596 [2022-11-18 18:31:54,652 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18744 transitions. [2022-11-18 18:31:54,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18744 transitions. [2022-11-18 18:31:54,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:54,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18744 transitions. [2022-11-18 18:31:54,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 892.5714285714286) internal successors, (18744), 21 states have internal predecessors, (18744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:54,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1126.0) internal successors, (24772), 22 states have internal predecessors, (24772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:54,679 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1126.0) internal successors, (24772), 22 states have internal predecessors, (24772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:54,679 INFO L175 Difference]: Start difference. First operand has 997 places, 925 transitions, 2056 flow. Second operand 21 states and 18744 transitions. [2022-11-18 18:31:54,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1017 places, 949 transitions, 2306 flow [2022-11-18 18:31:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1016 places, 949 transitions, 2292 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:54,691 INFO L231 Difference]: Finished difference. Result has 1021 places, 938 transitions, 2180 flow [2022-11-18 18:31:54,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=996, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2180, PETRI_PLACES=1021, PETRI_TRANSITIONS=938} [2022-11-18 18:31:54,693 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 26 predicate places. [2022-11-18 18:31:54,693 INFO L495 AbstractCegarLoop]: Abstraction has has 1021 places, 938 transitions, 2180 flow [2022-11-18 18:31:54,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 891.6111111111111) internal successors, (16049), 18 states have internal predecessors, (16049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:54,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:54,696 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:54,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:54,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:54,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash -625801188, now seen corresponding path program 1 times [2022-11-18 18:31:54,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:54,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66912887] [2022-11-18 18:31:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:54,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:55,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:55,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66912887] [2022-11-18 18:31:55,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66912887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:55,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409848048] [2022-11-18 18:31:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:55,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:55,099 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:55,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-18 18:31:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:56,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:31:56,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:56,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:56,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409848048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:56,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:56,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:31:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884885659] [2022-11-18 18:31:56,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:56,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:31:56,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:31:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:31:56,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-18 18:31:56,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1021 places, 938 transitions, 2180 flow. Second operand has 34 states, 34 states have (on average 891.7941176470588) internal successors, (30321), 34 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:56,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:56,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-18 18:31:56,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:58,484 INFO L130 PetriNetUnfolder]: 0/1388 cut-off events. [2022-11-18 18:31:58,485 INFO L131 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-11-18 18:31:58,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 1388 events. 0/1388 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4307 event pairs, 0 based on Foata normal form. 8/1396 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-11-18 18:31:58,487 INFO L137 encePairwiseOnDemand]: 1120/1126 looper letters, 66 selfloop transitions, 45 changer transitions 0/989 dead transitions. [2022-11-18 18:31:58,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1065 places, 989 transitions, 2718 flow [2022-11-18 18:31:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:31:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:31:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40124 transitions. [2022-11-18 18:31:58,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7918689559897375 [2022-11-18 18:31:58,506 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40124 transitions. [2022-11-18 18:31:58,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40124 transitions. [2022-11-18 18:31:58,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:58,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40124 transitions. [2022-11-18 18:31:58,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 891.6444444444444) internal successors, (40124), 45 states have internal predecessors, (40124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:58,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1126.0) internal successors, (51796), 46 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:58,561 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1126.0) internal successors, (51796), 46 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:58,562 INFO L175 Difference]: Start difference. First operand has 1021 places, 938 transitions, 2180 flow. Second operand 45 states and 40124 transitions. [2022-11-18 18:31:58,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1065 places, 989 transitions, 2718 flow [2022-11-18 18:31:58,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1059 places, 989 transitions, 2678 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:31:58,574 INFO L231 Difference]: Finished difference. Result has 1068 places, 963 transitions, 2458 flow [2022-11-18 18:31:58,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=1015, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2458, PETRI_PLACES=1068, PETRI_TRANSITIONS=963} [2022-11-18 18:31:58,574 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 73 predicate places. [2022-11-18 18:31:58,575 INFO L495 AbstractCegarLoop]: Abstraction has has 1068 places, 963 transitions, 2458 flow [2022-11-18 18:31:58,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 891.7941176470588) internal successors, (30321), 34 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:58,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:58,577 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:58,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-18 18:31:58,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:58,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:31:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1541200144, now seen corresponding path program 1 times [2022-11-18 18:31:58,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:58,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671566823] [2022-11-18 18:31:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:58,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:59,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671566823] [2022-11-18 18:31:59,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671566823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696025350] [2022-11-18 18:31:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:59,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:59,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:59,379 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:59,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-18 18:32:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:00,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:32:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:00,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:01,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696025350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:01,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:01,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:32:01,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125238985] [2022-11-18 18:32:01,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:01,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:32:01,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:32:01,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:32:01,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-18 18:32:01,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1068 places, 963 transitions, 2458 flow. Second operand has 66 states, 66 states have (on average 891.8939393939394) internal successors, (58865), 66 states have internal predecessors, (58865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:01,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:01,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-18 18:32:01,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:05,089 INFO L130 PetriNetUnfolder]: 0/1212 cut-off events. [2022-11-18 18:32:05,089 INFO L131 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-11-18 18:32:05,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2095 conditions, 1212 events. 0/1212 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3158 event pairs, 0 based on Foata normal form. 16/1228 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-18 18:32:05,091 INFO L137 encePairwiseOnDemand]: 1120/1126 looper letters, 98 selfloop transitions, 93 changer transitions 0/1069 dead transitions. [2022-11-18 18:32:05,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1160 places, 1069 transitions, 3688 flow [2022-11-18 18:32:05,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:32:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:32:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 82884 transitions. [2022-11-18 18:32:05,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914971638113791 [2022-11-18 18:32:05,127 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 82884 transitions. [2022-11-18 18:32:05,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 82884 transitions. [2022-11-18 18:32:05,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:05,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 82884 transitions. [2022-11-18 18:32:05,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 891.2258064516129) internal successors, (82884), 93 states have internal predecessors, (82884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:05,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1126.0) internal successors, (105844), 94 states have internal predecessors, (105844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:05,412 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1126.0) internal successors, (105844), 94 states have internal predecessors, (105844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:05,413 INFO L175 Difference]: Start difference. First operand has 1068 places, 963 transitions, 2458 flow. Second operand 93 states and 82884 transitions. [2022-11-18 18:32:05,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1160 places, 1069 transitions, 3688 flow [2022-11-18 18:32:05,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1142 places, 1069 transitions, 3600 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:32:05,428 INFO L231 Difference]: Finished difference. Result has 1159 places, 1012 transitions, 3092 flow [2022-11-18 18:32:05,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=1050, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3092, PETRI_PLACES=1159, PETRI_TRANSITIONS=1012} [2022-11-18 18:32:05,429 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 164 predicate places. [2022-11-18 18:32:05,429 INFO L495 AbstractCegarLoop]: Abstraction has has 1159 places, 1012 transitions, 3092 flow [2022-11-18 18:32:05,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 891.8939393939394) internal successors, (58865), 66 states have internal predecessors, (58865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:05,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:05,436 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:05,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-11-18 18:32:05,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:05,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash 521640888, now seen corresponding path program 1 times [2022-11-18 18:32:05,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:05,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280508447] [2022-11-18 18:32:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:05,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:07,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:07,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280508447] [2022-11-18 18:32:07,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280508447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:07,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741370713] [2022-11-18 18:32:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:07,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:07,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:07,897 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:07,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-18 18:32:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:09,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:32:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:09,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:13,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741370713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:13,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:13,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:32:13,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538073571] [2022-11-18 18:32:13,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:13,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:32:13,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:32:13,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:32:13,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-18 18:32:13,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1159 places, 1012 transitions, 3092 flow. Second operand has 130 states, 130 states have (on average 891.9461538461538) internal successors, (115953), 130 states have internal predecessors, (115953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:13,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:13,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-18 18:32:13,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:16,963 INFO L130 PetriNetUnfolder]: 0/1190 cut-off events. [2022-11-18 18:32:16,963 INFO L131 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-11-18 18:32:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 1190 events. 0/1190 cut-off events. For 1692/1692 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3031 event pairs, 0 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-18 18:32:16,965 INFO L137 encePairwiseOnDemand]: 1121/1126 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-11-18 18:32:16,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1246 places, 1064 transitions, 3872 flow [2022-11-18 18:32:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-18 18:32:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-18 18:32:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88209 transitions. [2022-11-18 18:32:17,003 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912966252220248 [2022-11-18 18:32:17,003 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88209 transitions. [2022-11-18 18:32:17,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88209 transitions. [2022-11-18 18:32:17,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:17,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88209 transitions. [2022-11-18 18:32:17,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 891.0) internal successors, (88209), 99 states have internal predecessors, (88209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:17,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 1126.0) internal successors, (112600), 100 states have internal predecessors, (112600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:17,138 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 1126.0) internal successors, (112600), 100 states have internal predecessors, (112600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:17,138 INFO L175 Difference]: Start difference. First operand has 1159 places, 1012 transitions, 3092 flow. Second operand 99 states and 88209 transitions. [2022-11-18 18:32:17,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1246 places, 1064 transitions, 3872 flow [2022-11-18 18:32:17,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1173 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-11-18 18:32:17,160 INFO L231 Difference]: Finished difference. Result has 1173 places, 1004 transitions, 2970 flow [2022-11-18 18:32:17,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2970, PETRI_PLACES=1173, PETRI_TRANSITIONS=1004} [2022-11-18 18:32:17,161 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 178 predicate places. [2022-11-18 18:32:17,161 INFO L495 AbstractCegarLoop]: Abstraction has has 1173 places, 1004 transitions, 2970 flow [2022-11-18 18:32:17,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 891.9461538461538) internal successors, (115953), 130 states have internal predecessors, (115953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:17,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:17,175 INFO L209 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:17,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-11-18 18:32:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:17,375 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:17,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1911325629, now seen corresponding path program 1 times [2022-11-18 18:32:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:17,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597771791] [2022-11-18 18:32:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:17,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:32:17,435 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:32:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:32:17,552 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:32:17,552 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:32:17,553 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:32:17,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:32:17,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-11-18 18:32:17,553 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:17,554 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:32:17,554 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-11-18 18:32:17,643 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:32:17,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1024 places, 1159 transitions, 3539 flow [2022-11-18 18:32:19,500 INFO L130 PetriNetUnfolder]: 334/2342 cut-off events. [2022-11-18 18:32:19,500 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-11-18 18:32:19,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 2342 events. 334/2342 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8550 event pairs, 0 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 2870. Up to 68 conditions per place. [2022-11-18 18:32:19,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 1024 places, 1159 transitions, 3539 flow [2022-11-18 18:32:19,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1024 places, 1159 transitions, 3539 flow [2022-11-18 18:32:19,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:32:19,685 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:32:19,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:32:19,689 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:32:19,689 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:32:19,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:19,689 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:19,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1561953574, now seen corresponding path program 1 times [2022-11-18 18:32:19,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:19,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606644952] [2022-11-18 18:32:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:19,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:19,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606644952] [2022-11-18 18:32:19,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606644952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:19,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:19,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:32:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612082821] [2022-11-18 18:32:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:19,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:32:19,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:19,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:32:19,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:32:19,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 923 out of 1159 [2022-11-18 18:32:19,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand has 2 states, 2 states have (on average 923.5) internal successors, (1847), 2 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:19,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:19,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 923 of 1159 [2022-11-18 18:32:19,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:21,215 INFO L130 PetriNetUnfolder]: 0/1974 cut-off events. [2022-11-18 18:32:21,215 INFO L131 PetriNetUnfolder]: For 7073/7073 co-relation queries the response was YES. [2022-11-18 18:32:21,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2669 conditions, 1974 events. 0/1974 cut-off events. For 7073/7073 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8063 event pairs, 0 based on Foata normal form. 3312/5218 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-11-18 18:32:21,219 INFO L137 encePairwiseOnDemand]: 957/1159 looper letters, 33 selfloop transitions, 0 changer transitions 11/956 dead transitions. [2022-11-18 18:32:21,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1024 places, 956 transitions, 3199 flow [2022-11-18 18:32:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:32:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:32:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2081 transitions. [2022-11-18 18:32:21,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8977566867989646 [2022-11-18 18:32:21,222 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2081 transitions. [2022-11-18 18:32:21,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2081 transitions. [2022-11-18 18:32:21,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:21,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2081 transitions. [2022-11-18 18:32:21,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1040.5) internal successors, (2081), 2 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:21,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1159.0) internal successors, (3477), 3 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:21,225 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1159.0) internal successors, (3477), 3 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:21,225 INFO L175 Difference]: Start difference. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand 2 states and 2081 transitions. [2022-11-18 18:32:21,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1024 places, 956 transitions, 3199 flow [2022-11-18 18:32:21,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 956 transitions, 2143 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-11-18 18:32:21,241 INFO L231 Difference]: Finished difference. Result has 1024 places, 945 transitions, 2055 flow [2022-11-18 18:32:21,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2055, PETRI_PLACES=1024, PETRI_TRANSITIONS=945} [2022-11-18 18:32:21,242 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 0 predicate places. [2022-11-18 18:32:21,242 INFO L495 AbstractCegarLoop]: Abstraction has has 1024 places, 945 transitions, 2055 flow [2022-11-18 18:32:21,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 923.5) internal successors, (1847), 2 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:21,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:21,243 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:21,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-11-18 18:32:21,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:21,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash 936062363, now seen corresponding path program 1 times [2022-11-18 18:32:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:21,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475668057] [2022-11-18 18:32:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:21,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:21,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475668057] [2022-11-18 18:32:21,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475668057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:21,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:21,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:32:21,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262244047] [2022-11-18 18:32:21,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:21,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:21,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:32:21,275 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 916 out of 1159 [2022-11-18 18:32:21,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 945 transitions, 2055 flow. Second operand has 3 states, 3 states have (on average 917.0) internal successors, (2751), 3 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:21,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:21,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 916 of 1159 [2022-11-18 18:32:21,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:22,466 INFO L130 PetriNetUnfolder]: 0/1589 cut-off events. [2022-11-18 18:32:22,466 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-18 18:32:22,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1926 conditions, 1589 events. 0/1589 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5503 event pairs, 0 based on Foata normal form. 0/1556 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2022-11-18 18:32:22,469 INFO L137 encePairwiseOnDemand]: 1156/1159 looper letters, 42 selfloop transitions, 2 changer transitions 0/949 dead transitions. [2022-11-18 18:32:22,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1015 places, 949 transitions, 2151 flow [2022-11-18 18:32:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:32:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2793 transitions. [2022-11-18 18:32:22,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8032786885245902 [2022-11-18 18:32:22,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2793 transitions. [2022-11-18 18:32:22,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2793 transitions. [2022-11-18 18:32:22,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:22,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2793 transitions. [2022-11-18 18:32:22,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 931.0) internal successors, (2793), 3 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:22,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1159.0) internal successors, (4636), 4 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:22,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1159.0) internal successors, (4636), 4 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:22,475 INFO L175 Difference]: Start difference. First operand has 1024 places, 945 transitions, 2055 flow. Second operand 3 states and 2793 transitions. [2022-11-18 18:32:22,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1015 places, 949 transitions, 2151 flow [2022-11-18 18:32:22,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1015 places, 949 transitions, 2151 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:32:22,483 INFO L231 Difference]: Finished difference. Result has 1016 places, 946 transitions, 2067 flow [2022-11-18 18:32:22,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=1013, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2067, PETRI_PLACES=1016, PETRI_TRANSITIONS=946} [2022-11-18 18:32:22,483 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, -8 predicate places. [2022-11-18 18:32:22,483 INFO L495 AbstractCegarLoop]: Abstraction has has 1016 places, 946 transitions, 2067 flow [2022-11-18 18:32:22,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 917.0) internal successors, (2751), 3 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:22,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:22,484 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:22,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-11-18 18:32:22,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1919436977, now seen corresponding path program 1 times [2022-11-18 18:32:22,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:22,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839745766] [2022-11-18 18:32:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:22,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839745766] [2022-11-18 18:32:22,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839745766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110303510] [2022-11-18 18:32:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:22,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:22,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:22,526 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:22,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-18 18:32:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:23,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:32:23,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:23,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:23,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110303510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:23,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:23,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:32:23,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476560241] [2022-11-18 18:32:23,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:23,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:32:23,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:32:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:32:23,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-18 18:32:23,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1016 places, 946 transitions, 2067 flow. Second operand has 10 states, 10 states have (on average 917.3) internal successors, (9173), 10 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:23,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:23,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-18 18:32:23,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:24,982 INFO L130 PetriNetUnfolder]: 0/1567 cut-off events. [2022-11-18 18:32:24,982 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-18 18:32:24,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1567 events. 0/1567 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5371 event pairs, 0 based on Foata normal form. 2/1569 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-11-18 18:32:24,985 INFO L137 encePairwiseOnDemand]: 1153/1159 looper letters, 43 selfloop transitions, 9 changer transitions 0/956 dead transitions. [2022-11-18 18:32:24,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1024 places, 956 transitions, 2193 flow [2022-11-18 18:32:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:32:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:32:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8289 transitions. [2022-11-18 18:32:24,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946505608283002 [2022-11-18 18:32:24,991 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8289 transitions. [2022-11-18 18:32:24,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8289 transitions. [2022-11-18 18:32:24,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:24,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8289 transitions. [2022-11-18 18:32:24,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 921.0) internal successors, (8289), 9 states have internal predecessors, (8289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:25,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1159.0) internal successors, (11590), 10 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:25,002 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1159.0) internal successors, (11590), 10 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:25,002 INFO L175 Difference]: Start difference. First operand has 1016 places, 946 transitions, 2067 flow. Second operand 9 states and 8289 transitions. [2022-11-18 18:32:25,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1024 places, 956 transitions, 2193 flow [2022-11-18 18:32:25,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1023 places, 956 transitions, 2191 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:32:25,011 INFO L231 Difference]: Finished difference. Result has 1026 places, 952 transitions, 2115 flow [2022-11-18 18:32:25,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=1015, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=940, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2115, PETRI_PLACES=1026, PETRI_TRANSITIONS=952} [2022-11-18 18:32:25,012 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 2 predicate places. [2022-11-18 18:32:25,012 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 952 transitions, 2115 flow [2022-11-18 18:32:25,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 917.3) internal successors, (9173), 10 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:25,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:25,013 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:25,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-11-18 18:32:25,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-11-18 18:32:25,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash 842671226, now seen corresponding path program 1 times [2022-11-18 18:32:25,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:25,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718661936] [2022-11-18 18:32:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:25,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:25,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:25,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718661936] [2022-11-18 18:32:25,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718661936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:25,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157651540] [2022-11-18 18:32:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:25,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:25,297 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:25,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-18 18:32:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:32:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:26,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:26,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157651540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:26,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:26,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:32:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010849534] [2022-11-18 18:32:26,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:26,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:32:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:32:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:32:26,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-18 18:32:26,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1026 places, 952 transitions, 2115 flow. Second operand has 18 states, 18 states have (on average 917.6111111111111) internal successors, (16517), 18 states have internal predecessors, (16517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:26,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:26,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-18 18:32:26,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:28,077 INFO L130 PetriNetUnfolder]: 0/1523 cut-off events. [2022-11-18 18:32:28,077 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-11-18 18:32:28,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2204 conditions, 1523 events. 0/1523 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5054 event pairs, 0 based on Foata normal form. 4/1527 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-11-18 18:32:28,080 INFO L137 encePairwiseOnDemand]: 1153/1159 looper letters, 51 selfloop transitions, 21 changer transitions 0/976 dead transitions. [2022-11-18 18:32:28,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 976 transitions, 2367 flow [2022-11-18 18:32:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:32:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:32:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19291 transitions. [2022-11-18 18:32:28,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.792596244710136 [2022-11-18 18:32:28,091 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19291 transitions. [2022-11-18 18:32:28,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19291 transitions. [2022-11-18 18:32:28,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:28,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19291 transitions. [2022-11-18 18:32:28,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 918.6190476190476) internal successors, (19291), 21 states have internal predecessors, (19291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:28,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1159.0) internal successors, (25498), 22 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:28,116 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1159.0) internal successors, (25498), 22 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:28,116 INFO L175 Difference]: Start difference. First operand has 1026 places, 952 transitions, 2115 flow. Second operand 21 states and 19291 transitions. [2022-11-18 18:32:28,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 976 transitions, 2367 flow [2022-11-18 18:32:28,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 976 transitions, 2353 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:32:28,126 INFO L231 Difference]: Finished difference. Result has 1050 places, 965 transitions, 2239 flow [2022-11-18 18:32:28,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=1025, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=941, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2239, PETRI_PLACES=1050, PETRI_TRANSITIONS=965} [2022-11-18 18:32:28,126 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 26 predicate places. [2022-11-18 18:32:28,126 INFO L495 AbstractCegarLoop]: Abstraction has has 1050 places, 965 transitions, 2239 flow [2022-11-18 18:32:28,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 917.6111111111111) internal successors, (16517), 18 states have internal predecessors, (16517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:28,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:28,128 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:28,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-11-18 18:32:28,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-11-18 18:32:28,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1444782812, now seen corresponding path program 1 times [2022-11-18 18:32:28,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:28,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849107626] [2022-11-18 18:32:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:28,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:28,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849107626] [2022-11-18 18:32:28,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849107626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94630808] [2022-11-18 18:32:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:28,515 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:28,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-18 18:32:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:29,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:32:29,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:29,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:30,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94630808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:30,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:30,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:32:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328119296] [2022-11-18 18:32:30,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:32:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:32:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:32:30,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-18 18:32:30,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1050 places, 965 transitions, 2239 flow. Second operand has 34 states, 34 states have (on average 917.7941176470588) internal successors, (31205), 34 states have internal predecessors, (31205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:30,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:30,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-18 18:32:30,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:32,391 INFO L130 PetriNetUnfolder]: 0/1435 cut-off events. [2022-11-18 18:32:32,391 INFO L131 PetriNetUnfolder]: For 762/762 co-relation queries the response was YES. [2022-11-18 18:32:32,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2321 conditions, 1435 events. 0/1435 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4478 event pairs, 0 based on Foata normal form. 8/1443 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-11-18 18:32:32,394 INFO L137 encePairwiseOnDemand]: 1153/1159 looper letters, 67 selfloop transitions, 45 changer transitions 0/1016 dead transitions. [2022-11-18 18:32:32,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1094 places, 1016 transitions, 2779 flow [2022-11-18 18:32:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:32:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:32:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 41295 transitions. [2022-11-18 18:32:32,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7917745182628703 [2022-11-18 18:32:32,417 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 41295 transitions. [2022-11-18 18:32:32,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 41295 transitions. [2022-11-18 18:32:32,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:32,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 41295 transitions. [2022-11-18 18:32:32,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 917.6666666666666) internal successors, (41295), 45 states have internal predecessors, (41295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:32,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1159.0) internal successors, (53314), 46 states have internal predecessors, (53314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:32,488 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1159.0) internal successors, (53314), 46 states have internal predecessors, (53314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:32,488 INFO L175 Difference]: Start difference. First operand has 1050 places, 965 transitions, 2239 flow. Second operand 45 states and 41295 transitions. [2022-11-18 18:32:32,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1094 places, 1016 transitions, 2779 flow [2022-11-18 18:32:32,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1088 places, 1016 transitions, 2739 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:32:32,503 INFO L231 Difference]: Finished difference. Result has 1097 places, 990 transitions, 2517 flow [2022-11-18 18:32:32,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=1044, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2517, PETRI_PLACES=1097, PETRI_TRANSITIONS=990} [2022-11-18 18:32:32,504 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 73 predicate places. [2022-11-18 18:32:32,504 INFO L495 AbstractCegarLoop]: Abstraction has has 1097 places, 990 transitions, 2517 flow [2022-11-18 18:32:32,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 917.7941176470588) internal successors, (31205), 34 states have internal predecessors, (31205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:32,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:32,507 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:32,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-11-18 18:32:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-11-18 18:32:32,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1380345904, now seen corresponding path program 1 times [2022-11-18 18:32:32,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:32,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69037206] [2022-11-18 18:32:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:33,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:33,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69037206] [2022-11-18 18:32:33,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69037206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:33,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890645379] [2022-11-18 18:32:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:33,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:33,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:33,436 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:33,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-18 18:32:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:34,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:32:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:34,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:35,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890645379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:35,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:35,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:32:35,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216489400] [2022-11-18 18:32:35,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:35,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:32:35,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:35,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:32:35,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:32:35,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-18 18:32:35,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1097 places, 990 transitions, 2517 flow. Second operand has 66 states, 66 states have (on average 917.8939393939394) internal successors, (60581), 66 states have internal predecessors, (60581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:35,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:35,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-18 18:32:35,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:39,481 INFO L130 PetriNetUnfolder]: 0/1259 cut-off events. [2022-11-18 18:32:39,481 INFO L131 PetriNetUnfolder]: For 2466/2466 co-relation queries the response was YES. [2022-11-18 18:32:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2185 conditions, 1259 events. 0/1259 cut-off events. For 2466/2466 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3326 event pairs, 0 based on Foata normal form. 16/1275 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-11-18 18:32:39,484 INFO L137 encePairwiseOnDemand]: 1153/1159 looper letters, 99 selfloop transitions, 93 changer transitions 0/1096 dead transitions. [2022-11-18 18:32:39,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1189 places, 1096 transitions, 3749 flow [2022-11-18 18:32:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:32:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:32:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 85303 transitions. [2022-11-18 18:32:39,524 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914034159963632 [2022-11-18 18:32:39,524 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 85303 transitions. [2022-11-18 18:32:39,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 85303 transitions. [2022-11-18 18:32:39,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:39,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 85303 transitions. [2022-11-18 18:32:39,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 917.236559139785) internal successors, (85303), 93 states have internal predecessors, (85303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:39,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1159.0) internal successors, (108946), 94 states have internal predecessors, (108946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:39,909 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1159.0) internal successors, (108946), 94 states have internal predecessors, (108946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:39,910 INFO L175 Difference]: Start difference. First operand has 1097 places, 990 transitions, 2517 flow. Second operand 93 states and 85303 transitions. [2022-11-18 18:32:39,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1189 places, 1096 transitions, 3749 flow [2022-11-18 18:32:39,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1171 places, 1096 transitions, 3661 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:32:39,930 INFO L231 Difference]: Finished difference. Result has 1188 places, 1039 transitions, 3151 flow [2022-11-18 18:32:39,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=1079, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3151, PETRI_PLACES=1188, PETRI_TRANSITIONS=1039} [2022-11-18 18:32:39,931 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 164 predicate places. [2022-11-18 18:32:39,931 INFO L495 AbstractCegarLoop]: Abstraction has has 1188 places, 1039 transitions, 3151 flow [2022-11-18 18:32:39,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 917.8939393939394) internal successors, (60581), 66 states have internal predecessors, (60581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:39,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:39,937 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:39,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-11-18 18:32:40,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-11-18 18:32:40,137 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1109435000, now seen corresponding path program 1 times [2022-11-18 18:32:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:40,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903173129] [2022-11-18 18:32:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:40,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:42,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903173129] [2022-11-18 18:32:42,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903173129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112121966] [2022-11-18 18:32:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:42,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:42,760 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:42,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-18 18:32:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:32:44,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:44,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:48,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112121966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:48,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:48,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:32:48,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883871689] [2022-11-18 18:32:48,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:48,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:32:48,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:32:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:32:48,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-18 18:32:48,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1188 places, 1039 transitions, 3151 flow. Second operand has 130 states, 130 states have (on average 917.9461538461538) internal successors, (119333), 130 states have internal predecessors, (119333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:48,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:48,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-18 18:32:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:52,310 INFO L130 PetriNetUnfolder]: 0/1226 cut-off events. [2022-11-18 18:32:52,310 INFO L131 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-11-18 18:32:52,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2216 conditions, 1226 events. 0/1226 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3129 event pairs, 0 based on Foata normal form. 3/1229 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-11-18 18:32:52,312 INFO L137 encePairwiseOnDemand]: 1154/1159 looper letters, 102 selfloop transitions, 100 changer transitions 0/1096 dead transitions. [2022-11-18 18:32:52,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1278 places, 1096 transitions, 3997 flow [2022-11-18 18:32:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-18 18:32:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-11-18 18:32:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 93535 transitions. [2022-11-18 18:32:52,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912077686985062 [2022-11-18 18:32:52,572 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 93535 transitions. [2022-11-18 18:32:52,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 93535 transitions. [2022-11-18 18:32:52,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:52,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 93535 transitions. [2022-11-18 18:32:52,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 917.0098039215686) internal successors, (93535), 102 states have internal predecessors, (93535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:52,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 1159.0) internal successors, (119377), 103 states have internal predecessors, (119377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:52,729 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 1159.0) internal successors, (119377), 103 states have internal predecessors, (119377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:52,729 INFO L175 Difference]: Start difference. First operand has 1188 places, 1039 transitions, 3151 flow. Second operand 102 states and 93535 transitions. [2022-11-18 18:32:52,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1278 places, 1096 transitions, 3997 flow [2022-11-18 18:32:52,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1205 places, 1096 transitions, 3655 flow, removed 20 selfloop flow, removed 73 redundant places. [2022-11-18 18:32:52,751 INFO L231 Difference]: Finished difference. Result has 1205 places, 1034 transitions, 3063 flow [2022-11-18 18:32:52,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=3063, PETRI_PLACES=1205, PETRI_TRANSITIONS=1034} [2022-11-18 18:32:52,752 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 181 predicate places. [2022-11-18 18:32:52,752 INFO L495 AbstractCegarLoop]: Abstraction has has 1205 places, 1034 transitions, 3063 flow [2022-11-18 18:32:52,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 917.9461538461538) internal successors, (119333), 130 states have internal predecessors, (119333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:52,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:52,763 INFO L209 CegarLoopForPetriNet]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:52,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-18 18:32:52,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-11-18 18:32:52,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash -878423593, now seen corresponding path program 1 times [2022-11-18 18:32:52,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:52,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014964095] [2022-11-18 18:32:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:52,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:32:53,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:32:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:32:53,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:32:53,117 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:32:53,117 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:32:53,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:32:53,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-11-18 18:32:53,117 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:53,118 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:32:53,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2022-11-18 18:32:53,212 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:32:53,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1053 places, 1192 transitions, 3676 flow [2022-11-18 18:32:54,639 INFO L130 PetriNetUnfolder]: 344/2411 cut-off events. [2022-11-18 18:32:54,639 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-11-18 18:32:54,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3109 conditions, 2411 events. 344/2411 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8829 event pairs, 0 based on Foata normal form. 0/1997 useless extension candidates. Maximal degree in co-relation 2975. Up to 70 conditions per place. [2022-11-18 18:32:54,753 INFO L82 GeneralOperation]: Start removeDead. Operand has 1053 places, 1192 transitions, 3676 flow [2022-11-18 18:32:54,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1053 places, 1192 transitions, 3676 flow [2022-11-18 18:32:54,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:32:54,814 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:32:54,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:32:54,817 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:32:54,818 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:32:54,818 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:54,818 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:54,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:54,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1013090522, now seen corresponding path program 1 times [2022-11-18 18:32:54,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:54,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875634530] [2022-11-18 18:32:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:54,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:54,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875634530] [2022-11-18 18:32:54,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875634530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:54,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:54,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:32:54,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297710936] [2022-11-18 18:32:54,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:54,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:32:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:32:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:32:54,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 949 out of 1192 [2022-11-18 18:32:54,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1053 places, 1192 transitions, 3676 flow. Second operand has 2 states, 2 states have (on average 949.5) internal successors, (1899), 2 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:54,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:54,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 949 of 1192 [2022-11-18 18:32:54,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:56,537 INFO L130 PetriNetUnfolder]: 0/2032 cut-off events. [2022-11-18 18:32:56,537 INFO L131 PetriNetUnfolder]: For 7701/7701 co-relation queries the response was YES. [2022-11-18 18:32:56,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2765 conditions, 2032 events. 0/2032 cut-off events. For 7701/7701 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8310 event pairs, 0 based on Foata normal form. 3514/5476 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-18 18:32:56,541 INFO L137 encePairwiseOnDemand]: 984/1192 looper letters, 34 selfloop transitions, 0 changer transitions 11/983 dead transitions. [2022-11-18 18:32:56,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1053 places, 983 transitions, 3326 flow [2022-11-18 18:32:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:32:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:32:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2140 transitions. [2022-11-18 18:32:56,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8976510067114094 [2022-11-18 18:32:56,544 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2140 transitions. [2022-11-18 18:32:56,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2140 transitions. [2022-11-18 18:32:56,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:56,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2140 transitions. [2022-11-18 18:32:56,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1070.0) internal successors, (2140), 2 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:56,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1192.0) internal successors, (3576), 3 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:56,547 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1192.0) internal successors, (3576), 3 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:56,547 INFO L175 Difference]: Start difference. First operand has 1053 places, 1192 transitions, 3676 flow. Second operand 2 states and 2140 transitions. [2022-11-18 18:32:56,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1053 places, 983 transitions, 3326 flow [2022-11-18 18:32:56,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1053 places, 983 transitions, 2204 flow, removed 561 selfloop flow, removed 0 redundant places. [2022-11-18 18:32:56,570 INFO L231 Difference]: Finished difference. Result has 1053 places, 972 transitions, 2114 flow [2022-11-18 18:32:56,570 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=1052, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2114, PETRI_PLACES=1053, PETRI_TRANSITIONS=972} [2022-11-18 18:32:56,570 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 0 predicate places. [2022-11-18 18:32:56,571 INFO L495 AbstractCegarLoop]: Abstraction has has 1053 places, 972 transitions, 2114 flow [2022-11-18 18:32:56,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 949.5) internal successors, (1899), 2 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:56,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:56,571 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:56,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-11-18 18:32:56,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -783860837, now seen corresponding path program 1 times [2022-11-18 18:32:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:56,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003500890] [2022-11-18 18:32:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:56,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003500890] [2022-11-18 18:32:56,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003500890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:56,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:56,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:32:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138338834] [2022-11-18 18:32:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:56,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:56,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:32:56,615 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 942 out of 1192 [2022-11-18 18:32:56,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1053 places, 972 transitions, 2114 flow. Second operand has 3 states, 3 states have (on average 943.0) internal successors, (2829), 3 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:56,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:56,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 942 of 1192 [2022-11-18 18:32:56,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:58,191 INFO L130 PetriNetUnfolder]: 0/1636 cut-off events. [2022-11-18 18:32:58,191 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-18 18:32:58,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 1636 events. 0/1636 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5674 event pairs, 0 based on Foata normal form. 0/1602 useless extension candidates. Maximal degree in co-relation 0. Up to 204 conditions per place. [2022-11-18 18:32:58,195 INFO L137 encePairwiseOnDemand]: 1189/1192 looper letters, 43 selfloop transitions, 2 changer transitions 0/976 dead transitions. [2022-11-18 18:32:58,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1044 places, 976 transitions, 2212 flow [2022-11-18 18:32:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:32:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2872 transitions. [2022-11-18 18:32:58,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8031319910514542 [2022-11-18 18:32:58,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2872 transitions. [2022-11-18 18:32:58,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2872 transitions. [2022-11-18 18:32:58,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:58,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2872 transitions. [2022-11-18 18:32:58,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 957.3333333333334) internal successors, (2872), 3 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:58,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1192.0) internal successors, (4768), 4 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:58,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1192.0) internal successors, (4768), 4 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:58,204 INFO L175 Difference]: Start difference. First operand has 1053 places, 972 transitions, 2114 flow. Second operand 3 states and 2872 transitions. [2022-11-18 18:32:58,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1044 places, 976 transitions, 2212 flow [2022-11-18 18:32:58,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1044 places, 976 transitions, 2212 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:32:58,215 INFO L231 Difference]: Finished difference. Result has 1045 places, 973 transitions, 2126 flow [2022-11-18 18:32:58,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=1042, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2126, PETRI_PLACES=1045, PETRI_TRANSITIONS=973} [2022-11-18 18:32:58,216 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, -8 predicate places. [2022-11-18 18:32:58,216 INFO L495 AbstractCegarLoop]: Abstraction has has 1045 places, 973 transitions, 2126 flow [2022-11-18 18:32:58,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 943.0) internal successors, (2829), 3 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:58,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:58,216 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:58,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-11-18 18:32:58,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:32:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash 504131183, now seen corresponding path program 1 times [2022-11-18 18:32:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:58,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422399576] [2022-11-18 18:32:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:58,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:58,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422399576] [2022-11-18 18:32:58,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422399576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:58,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893476681] [2022-11-18 18:32:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:58,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:58,272 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:58,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-18 18:32:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:59,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:32:59,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:59,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:59,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893476681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:59,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:59,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:32:59,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333663007] [2022-11-18 18:32:59,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:59,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:32:59,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:32:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:32:59,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-18 18:32:59,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1045 places, 973 transitions, 2126 flow. Second operand has 10 states, 10 states have (on average 943.3) internal successors, (9433), 10 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:59,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:59,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-18 18:32:59,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:01,477 INFO L130 PetriNetUnfolder]: 0/1614 cut-off events. [2022-11-18 18:33:01,477 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-18 18:33:01,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 1614 events. 0/1614 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5544 event pairs, 0 based on Foata normal form. 2/1616 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-11-18 18:33:01,483 INFO L137 encePairwiseOnDemand]: 1186/1192 looper letters, 44 selfloop transitions, 9 changer transitions 0/983 dead transitions. [2022-11-18 18:33:01,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1053 places, 983 transitions, 2254 flow [2022-11-18 18:33:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:33:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:33:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8524 transitions. [2022-11-18 18:33:01,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7945563012677107 [2022-11-18 18:33:01,491 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8524 transitions. [2022-11-18 18:33:01,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8524 transitions. [2022-11-18 18:33:01,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:01,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8524 transitions. [2022-11-18 18:33:01,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 947.1111111111111) internal successors, (8524), 9 states have internal predecessors, (8524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:01,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1192.0) internal successors, (11920), 10 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:01,507 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1192.0) internal successors, (11920), 10 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:01,507 INFO L175 Difference]: Start difference. First operand has 1045 places, 973 transitions, 2126 flow. Second operand 9 states and 8524 transitions. [2022-11-18 18:33:01,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1053 places, 983 transitions, 2254 flow [2022-11-18 18:33:01,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1052 places, 983 transitions, 2252 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:01,519 INFO L231 Difference]: Finished difference. Result has 1055 places, 979 transitions, 2174 flow [2022-11-18 18:33:01,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=1044, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=967, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2174, PETRI_PLACES=1055, PETRI_TRANSITIONS=979} [2022-11-18 18:33:01,520 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 2 predicate places. [2022-11-18 18:33:01,520 INFO L495 AbstractCegarLoop]: Abstraction has has 1055 places, 979 transitions, 2174 flow [2022-11-18 18:33:01,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 943.3) internal successors, (9433), 10 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:01,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:01,522 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:01,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:01,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1382512090, now seen corresponding path program 1 times [2022-11-18 18:33:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:01,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503306251] [2022-11-18 18:33:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:01,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:01,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:01,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503306251] [2022-11-18 18:33:01,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503306251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:01,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92052975] [2022-11-18 18:33:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:01,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:01,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:01,801 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:01,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-18 18:33:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:33:03,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:03,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:03,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92052975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:03,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:03,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:33:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566622804] [2022-11-18 18:33:03,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:33:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:33:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:33:03,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-18 18:33:03,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1055 places, 979 transitions, 2174 flow. Second operand has 18 states, 18 states have (on average 943.6111111111111) internal successors, (16985), 18 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:03,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:03,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-18 18:33:03,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:04,750 INFO L130 PetriNetUnfolder]: 0/1570 cut-off events. [2022-11-18 18:33:04,751 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-11-18 18:33:04,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 1570 events. 0/1570 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5252 event pairs, 0 based on Foata normal form. 4/1574 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-11-18 18:33:04,754 INFO L137 encePairwiseOnDemand]: 1186/1192 looper letters, 52 selfloop transitions, 21 changer transitions 0/1003 dead transitions. [2022-11-18 18:33:04,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1075 places, 1003 transitions, 2428 flow [2022-11-18 18:33:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:33:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:33:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19838 transitions. [2022-11-18 18:33:04,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7925055928411633 [2022-11-18 18:33:04,766 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19838 transitions. [2022-11-18 18:33:04,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19838 transitions. [2022-11-18 18:33:04,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:04,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19838 transitions. [2022-11-18 18:33:04,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 944.6666666666666) internal successors, (19838), 21 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:04,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1192.0) internal successors, (26224), 22 states have internal predecessors, (26224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:04,797 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1192.0) internal successors, (26224), 22 states have internal predecessors, (26224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:04,798 INFO L175 Difference]: Start difference. First operand has 1055 places, 979 transitions, 2174 flow. Second operand 21 states and 19838 transitions. [2022-11-18 18:33:04,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1075 places, 1003 transitions, 2428 flow [2022-11-18 18:33:04,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1074 places, 1003 transitions, 2414 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:04,809 INFO L231 Difference]: Finished difference. Result has 1079 places, 992 transitions, 2298 flow [2022-11-18 18:33:04,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=1054, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=968, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2298, PETRI_PLACES=1079, PETRI_TRANSITIONS=992} [2022-11-18 18:33:04,810 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 26 predicate places. [2022-11-18 18:33:04,810 INFO L495 AbstractCegarLoop]: Abstraction has has 1079 places, 992 transitions, 2298 flow [2022-11-18 18:33:04,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 943.6111111111111) internal successors, (16985), 18 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:04,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:04,812 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:04,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:05,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-11-18 18:33:05,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:05,013 INFO L85 PathProgramCache]: Analyzing trace with hash 496060604, now seen corresponding path program 1 times [2022-11-18 18:33:05,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:05,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685486533] [2022-11-18 18:33:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:05,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:05,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:05,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685486533] [2022-11-18 18:33:05,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685486533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:05,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88397595] [2022-11-18 18:33:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:05,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:05,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:05,205 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:05,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-18 18:33:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:06,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:33:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:06,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:06,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88397595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:06,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:06,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:33:06,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708476928] [2022-11-18 18:33:06,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:06,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:33:06,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:33:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:33:06,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-18 18:33:06,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1079 places, 992 transitions, 2298 flow. Second operand has 34 states, 34 states have (on average 943.7941176470588) internal successors, (32089), 34 states have internal predecessors, (32089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:06,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:06,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-18 18:33:06,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:09,500 INFO L130 PetriNetUnfolder]: 0/1482 cut-off events. [2022-11-18 18:33:09,501 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-11-18 18:33:09,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 1482 events. 0/1482 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4648 event pairs, 0 based on Foata normal form. 8/1490 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-11-18 18:33:09,505 INFO L137 encePairwiseOnDemand]: 1186/1192 looper letters, 68 selfloop transitions, 45 changer transitions 0/1043 dead transitions. [2022-11-18 18:33:09,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1123 places, 1043 transitions, 2840 flow [2022-11-18 18:33:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:33:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:33:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 42466 transitions. [2022-11-18 18:33:09,528 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916853094705444 [2022-11-18 18:33:09,528 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 42466 transitions. [2022-11-18 18:33:09,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 42466 transitions. [2022-11-18 18:33:09,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:09,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 42466 transitions. [2022-11-18 18:33:09,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 943.6888888888889) internal successors, (42466), 45 states have internal predecessors, (42466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1192.0) internal successors, (54832), 46 states have internal predecessors, (54832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,600 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1192.0) internal successors, (54832), 46 states have internal predecessors, (54832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,600 INFO L175 Difference]: Start difference. First operand has 1079 places, 992 transitions, 2298 flow. Second operand 45 states and 42466 transitions. [2022-11-18 18:33:09,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1123 places, 1043 transitions, 2840 flow [2022-11-18 18:33:09,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1117 places, 1043 transitions, 2800 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:33:09,618 INFO L231 Difference]: Finished difference. Result has 1126 places, 1017 transitions, 2576 flow [2022-11-18 18:33:09,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2576, PETRI_PLACES=1126, PETRI_TRANSITIONS=1017} [2022-11-18 18:33:09,619 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 73 predicate places. [2022-11-18 18:33:09,619 INFO L495 AbstractCegarLoop]: Abstraction has has 1126 places, 1017 transitions, 2576 flow [2022-11-18 18:33:09,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 943.7941176470588) internal successors, (32089), 34 states have internal predecessors, (32089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:09,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:09,624 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:09,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:09,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-11-18 18:33:09,824 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash -187799888, now seen corresponding path program 1 times [2022-11-18 18:33:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766799580] [2022-11-18 18:33:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766799580] [2022-11-18 18:33:10,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766799580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253479690] [2022-11-18 18:33:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:10,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:10,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:10,524 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:10,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-18 18:33:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:11,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:33:11,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:12,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:13,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253479690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:13,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:13,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:33:13,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510079835] [2022-11-18 18:33:13,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:13,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:33:13,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:13,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:33:13,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:33:13,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-18 18:33:13,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1126 places, 1017 transitions, 2576 flow. Second operand has 66 states, 66 states have (on average 943.8939393939394) internal successors, (62297), 66 states have internal predecessors, (62297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:13,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:13,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-18 18:33:13,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:16,337 INFO L130 PetriNetUnfolder]: 0/1306 cut-off events. [2022-11-18 18:33:16,337 INFO L131 PetriNetUnfolder]: For 2587/2587 co-relation queries the response was YES. [2022-11-18 18:33:16,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 1306 events. 0/1306 cut-off events. For 2587/2587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3500 event pairs, 0 based on Foata normal form. 16/1322 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-11-18 18:33:16,339 INFO L137 encePairwiseOnDemand]: 1186/1192 looper letters, 100 selfloop transitions, 93 changer transitions 0/1123 dead transitions. [2022-11-18 18:33:16,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1218 places, 1123 transitions, 3810 flow [2022-11-18 18:33:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:33:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:33:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 87722 transitions. [2022-11-18 18:33:16,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913148589160713 [2022-11-18 18:33:16,376 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 87722 transitions. [2022-11-18 18:33:16,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 87722 transitions. [2022-11-18 18:33:16,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:16,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 87722 transitions. [2022-11-18 18:33:16,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 943.247311827957) internal successors, (87722), 93 states have internal predecessors, (87722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:16,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1192.0) internal successors, (112048), 94 states have internal predecessors, (112048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:16,494 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1192.0) internal successors, (112048), 94 states have internal predecessors, (112048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:16,495 INFO L175 Difference]: Start difference. First operand has 1126 places, 1017 transitions, 2576 flow. Second operand 93 states and 87722 transitions. [2022-11-18 18:33:16,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1218 places, 1123 transitions, 3810 flow [2022-11-18 18:33:16,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1200 places, 1123 transitions, 3722 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:33:16,515 INFO L231 Difference]: Finished difference. Result has 1217 places, 1066 transitions, 3210 flow [2022-11-18 18:33:16,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=1108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3210, PETRI_PLACES=1217, PETRI_TRANSITIONS=1066} [2022-11-18 18:33:16,515 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 164 predicate places. [2022-11-18 18:33:16,515 INFO L495 AbstractCegarLoop]: Abstraction has has 1217 places, 1066 transitions, 3210 flow [2022-11-18 18:33:16,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 943.8939393939394) internal successors, (62297), 66 states have internal predecessors, (62297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:16,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:16,522 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:16,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-11-18 18:33:16,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:16,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:16,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1698053288, now seen corresponding path program 1 times [2022-11-18 18:33:16,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:16,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545092957] [2022-11-18 18:33:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:16,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:19,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545092957] [2022-11-18 18:33:19,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545092957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152227055] [2022-11-18 18:33:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:19,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:19,010 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:19,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-18 18:33:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:20,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:33:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:20,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:24,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152227055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:24,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:24,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:33:24,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929442961] [2022-11-18 18:33:24,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:24,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:33:24,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:33:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:33:24,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-18 18:33:24,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1217 places, 1066 transitions, 3210 flow. Second operand has 130 states, 130 states have (on average 943.9461538461538) internal successors, (122713), 130 states have internal predecessors, (122713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:24,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:24,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-18 18:33:24,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:28,748 INFO L130 PetriNetUnfolder]: 0/1262 cut-off events. [2022-11-18 18:33:28,748 INFO L131 PetriNetUnfolder]: For 2686/2686 co-relation queries the response was YES. [2022-11-18 18:33:28,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 1262 events. 0/1262 cut-off events. For 2686/2686 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3227 event pairs, 0 based on Foata normal form. 4/1266 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-11-18 18:33:28,750 INFO L137 encePairwiseOnDemand]: 1187/1192 looper letters, 105 selfloop transitions, 103 changer transitions 0/1128 dead transitions. [2022-11-18 18:33:28,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1310 places, 1128 transitions, 4122 flow [2022-11-18 18:33:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-18 18:33:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-11-18 18:33:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 99017 transitions. [2022-11-18 18:33:28,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911233620965165 [2022-11-18 18:33:28,800 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 99017 transitions. [2022-11-18 18:33:28,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 99017 transitions. [2022-11-18 18:33:28,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:28,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 99017 transitions. [2022-11-18 18:33:28,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 943.0190476190476) internal successors, (99017), 105 states have internal predecessors, (99017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:28,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 1192.0) internal successors, (126352), 106 states have internal predecessors, (126352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:28,943 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 1192.0) internal successors, (126352), 106 states have internal predecessors, (126352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:28,944 INFO L175 Difference]: Start difference. First operand has 1217 places, 1066 transitions, 3210 flow. Second operand 105 states and 99017 transitions. [2022-11-18 18:33:28,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1310 places, 1128 transitions, 4122 flow [2022-11-18 18:33:28,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1237 places, 1128 transitions, 3770 flow, removed 21 selfloop flow, removed 73 redundant places. [2022-11-18 18:33:28,961 INFO L231 Difference]: Finished difference. Result has 1237 places, 1064 transitions, 3156 flow [2022-11-18 18:33:28,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=3156, PETRI_PLACES=1237, PETRI_TRANSITIONS=1064} [2022-11-18 18:33:28,962 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 184 predicate places. [2022-11-18 18:33:28,962 INFO L495 AbstractCegarLoop]: Abstraction has has 1237 places, 1064 transitions, 3156 flow [2022-11-18 18:33:28,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 943.9461538461538) internal successors, (122713), 130 states have internal predecessors, (122713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:28,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:28,972 INFO L209 CegarLoopForPetriNet]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:28,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:29,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-11-18 18:33:29,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1463256524, now seen corresponding path program 1 times [2022-11-18 18:33:29,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:29,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348934569] [2022-11-18 18:33:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:29,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:33:29,230 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:33:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:33:29,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:33:29,324 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:33:29,324 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:33:29,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:33:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-11-18 18:33:29,325 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:29,325 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:33:29,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2022-11-18 18:33:29,425 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:33:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1082 places, 1225 transitions, 3815 flow [2022-11-18 18:33:31,126 INFO L130 PetriNetUnfolder]: 354/2480 cut-off events. [2022-11-18 18:33:31,126 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-11-18 18:33:31,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3216 conditions, 2480 events. 354/2480 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9103 event pairs, 0 based on Foata normal form. 0/2054 useless extension candidates. Maximal degree in co-relation 3081. Up to 72 conditions per place. [2022-11-18 18:33:31,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 1082 places, 1225 transitions, 3815 flow [2022-11-18 18:33:31,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1082 places, 1225 transitions, 3815 flow [2022-11-18 18:33:31,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:33:31,367 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:33:31,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:33:31,371 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:33:31,371 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:33:31,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:31,372 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:31,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1717320090, now seen corresponding path program 1 times [2022-11-18 18:33:31,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:31,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943866388] [2022-11-18 18:33:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:31,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:31,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943866388] [2022-11-18 18:33:31,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943866388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:31,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:31,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:33:31,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449474427] [2022-11-18 18:33:31,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:33:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:33:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:33:31,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 975 out of 1225 [2022-11-18 18:33:31,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1082 places, 1225 transitions, 3815 flow. Second operand has 2 states, 2 states have (on average 975.5) internal successors, (1951), 2 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:31,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 975 of 1225 [2022-11-18 18:33:31,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:33,033 INFO L130 PetriNetUnfolder]: 0/2090 cut-off events. [2022-11-18 18:33:33,033 INFO L131 PetriNetUnfolder]: For 8365/8365 co-relation queries the response was YES. [2022-11-18 18:33:33,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2862 conditions, 2090 events. 0/2090 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8691 event pairs, 0 based on Foata normal form. 3722/5740 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-18 18:33:33,037 INFO L137 encePairwiseOnDemand]: 1011/1225 looper letters, 35 selfloop transitions, 0 changer transitions 11/1010 dead transitions. [2022-11-18 18:33:33,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1082 places, 1010 transitions, 3455 flow [2022-11-18 18:33:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:33:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:33:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2199 transitions. [2022-11-18 18:33:33,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8975510204081633 [2022-11-18 18:33:33,040 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2199 transitions. [2022-11-18 18:33:33,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2199 transitions. [2022-11-18 18:33:33,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:33,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2199 transitions. [2022-11-18 18:33:33,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1099.5) internal successors, (2199), 2 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1225.0) internal successors, (3675), 3 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,043 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1225.0) internal successors, (3675), 3 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,044 INFO L175 Difference]: Start difference. First operand has 1082 places, 1225 transitions, 3815 flow. Second operand 2 states and 2199 transitions. [2022-11-18 18:33:33,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1082 places, 1010 transitions, 3455 flow [2022-11-18 18:33:33,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1082 places, 1010 transitions, 2265 flow, removed 595 selfloop flow, removed 0 redundant places. [2022-11-18 18:33:33,063 INFO L231 Difference]: Finished difference. Result has 1082 places, 999 transitions, 2173 flow [2022-11-18 18:33:33,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=1081, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2173, PETRI_PLACES=1082, PETRI_TRANSITIONS=999} [2022-11-18 18:33:33,063 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 0 predicate places. [2022-11-18 18:33:33,064 INFO L495 AbstractCegarLoop]: Abstraction has has 1082 places, 999 transitions, 2173 flow [2022-11-18 18:33:33,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 975.5) internal successors, (1951), 2 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:33,064 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:33,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-11-18 18:33:33,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:33,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash -79631269, now seen corresponding path program 1 times [2022-11-18 18:33:33,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:33,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028482034] [2022-11-18 18:33:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:33,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:33,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028482034] [2022-11-18 18:33:33,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028482034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:33,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:33,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:33,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39304981] [2022-11-18 18:33:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:33,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:33,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:33,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 968 out of 1225 [2022-11-18 18:33:33,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1082 places, 999 transitions, 2173 flow. Second operand has 3 states, 3 states have (on average 969.0) internal successors, (2907), 3 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:33,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:33,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 968 of 1225 [2022-11-18 18:33:33,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:34,676 INFO L130 PetriNetUnfolder]: 0/1683 cut-off events. [2022-11-18 18:33:34,676 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-18 18:33:34,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 1683 events. 0/1683 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5811 event pairs, 0 based on Foata normal form. 0/1648 useless extension candidates. Maximal degree in co-relation 0. Up to 210 conditions per place. [2022-11-18 18:33:34,681 INFO L137 encePairwiseOnDemand]: 1222/1225 looper letters, 44 selfloop transitions, 2 changer transitions 0/1003 dead transitions. [2022-11-18 18:33:34,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1073 places, 1003 transitions, 2273 flow [2022-11-18 18:33:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:33:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2951 transitions. [2022-11-18 18:33:34,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8029931972789116 [2022-11-18 18:33:34,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2951 transitions. [2022-11-18 18:33:34,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2951 transitions. [2022-11-18 18:33:34,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:34,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2951 transitions. [2022-11-18 18:33:34,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 983.6666666666666) internal successors, (2951), 3 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1225.0) internal successors, (4900), 4 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1225.0) internal successors, (4900), 4 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,689 INFO L175 Difference]: Start difference. First operand has 1082 places, 999 transitions, 2173 flow. Second operand 3 states and 2951 transitions. [2022-11-18 18:33:34,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1073 places, 1003 transitions, 2273 flow [2022-11-18 18:33:34,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1073 places, 1003 transitions, 2273 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:33:34,699 INFO L231 Difference]: Finished difference. Result has 1074 places, 1000 transitions, 2185 flow [2022-11-18 18:33:34,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=1071, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2185, PETRI_PLACES=1074, PETRI_TRANSITIONS=1000} [2022-11-18 18:33:34,700 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, -8 predicate places. [2022-11-18 18:33:34,700 INFO L495 AbstractCegarLoop]: Abstraction has has 1074 places, 1000 transitions, 2185 flow [2022-11-18 18:33:34,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 969.0) internal successors, (2907), 3 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:34,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:34,701 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:34,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-11-18 18:33:34,701 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash -175039249, now seen corresponding path program 1 times [2022-11-18 18:33:34,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:34,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467770404] [2022-11-18 18:33:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:34,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:34,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467770404] [2022-11-18 18:33:34,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467770404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396653329] [2022-11-18 18:33:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:34,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:34,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:34,751 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:34,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-18 18:33:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:36,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:33:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:36,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:36,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396653329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:36,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:36,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:33:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372566560] [2022-11-18 18:33:36,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:36,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:33:36,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:33:36,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:33:36,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-18 18:33:36,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1074 places, 1000 transitions, 2185 flow. Second operand has 10 states, 10 states have (on average 969.3) internal successors, (9693), 10 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:36,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:36,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-18 18:33:36,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:37,619 INFO L130 PetriNetUnfolder]: 0/1661 cut-off events. [2022-11-18 18:33:37,619 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-18 18:33:37,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2123 conditions, 1661 events. 0/1661 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5682 event pairs, 0 based on Foata normal form. 2/1663 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-11-18 18:33:37,622 INFO L137 encePairwiseOnDemand]: 1219/1225 looper letters, 45 selfloop transitions, 9 changer transitions 0/1010 dead transitions. [2022-11-18 18:33:37,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1082 places, 1010 transitions, 2315 flow [2022-11-18 18:33:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:33:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:33:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8759 transitions. [2022-11-18 18:33:37,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7944671201814059 [2022-11-18 18:33:37,628 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8759 transitions. [2022-11-18 18:33:37,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8759 transitions. [2022-11-18 18:33:37,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:37,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8759 transitions. [2022-11-18 18:33:37,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 973.2222222222222) internal successors, (8759), 9 states have internal predecessors, (8759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1225.0) internal successors, (12250), 10 states have internal predecessors, (12250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,640 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1225.0) internal successors, (12250), 10 states have internal predecessors, (12250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,640 INFO L175 Difference]: Start difference. First operand has 1074 places, 1000 transitions, 2185 flow. Second operand 9 states and 8759 transitions. [2022-11-18 18:33:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1082 places, 1010 transitions, 2315 flow [2022-11-18 18:33:37,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1081 places, 1010 transitions, 2313 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:37,649 INFO L231 Difference]: Finished difference. Result has 1084 places, 1006 transitions, 2233 flow [2022-11-18 18:33:37,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=994, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2233, PETRI_PLACES=1084, PETRI_TRANSITIONS=1006} [2022-11-18 18:33:37,650 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 2 predicate places. [2022-11-18 18:33:37,650 INFO L495 AbstractCegarLoop]: Abstraction has has 1084 places, 1006 transitions, 2233 flow [2022-11-18 18:33:37,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 969.3) internal successors, (9693), 10 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:37,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:37,651 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:37,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-11-18 18:33:37,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:37,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash -989360166, now seen corresponding path program 1 times [2022-11-18 18:33:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:37,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552353634] [2022-11-18 18:33:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:37,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:37,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552353634] [2022-11-18 18:33:37,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552353634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:37,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379747989] [2022-11-18 18:33:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:37,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:37,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:37,931 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:37,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-18 18:33:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:33:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:39,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:39,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379747989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:39,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:39,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:33:39,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655803005] [2022-11-18 18:33:39,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:39,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:33:39,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:33:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:33:39,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-18 18:33:39,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1084 places, 1006 transitions, 2233 flow. Second operand has 18 states, 18 states have (on average 969.6111111111111) internal successors, (17453), 18 states have internal predecessors, (17453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:39,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:39,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-18 18:33:39,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:41,205 INFO L130 PetriNetUnfolder]: 0/1617 cut-off events. [2022-11-18 18:33:41,205 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-18 18:33:41,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 1617 events. 0/1617 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5423 event pairs, 0 based on Foata normal form. 4/1621 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-11-18 18:33:41,209 INFO L137 encePairwiseOnDemand]: 1219/1225 looper letters, 53 selfloop transitions, 21 changer transitions 0/1030 dead transitions. [2022-11-18 18:33:41,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 1030 transitions, 2489 flow [2022-11-18 18:33:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:33:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:33:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20385 transitions. [2022-11-18 18:33:41,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7924198250728863 [2022-11-18 18:33:41,219 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20385 transitions. [2022-11-18 18:33:41,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20385 transitions. [2022-11-18 18:33:41,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:41,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20385 transitions. [2022-11-18 18:33:41,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 970.7142857142857) internal successors, (20385), 21 states have internal predecessors, (20385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:41,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1225.0) internal successors, (26950), 22 states have internal predecessors, (26950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:41,248 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1225.0) internal successors, (26950), 22 states have internal predecessors, (26950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:41,248 INFO L175 Difference]: Start difference. First operand has 1084 places, 1006 transitions, 2233 flow. Second operand 21 states and 20385 transitions. [2022-11-18 18:33:41,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 1030 transitions, 2489 flow [2022-11-18 18:33:41,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1103 places, 1030 transitions, 2475 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:33:41,261 INFO L231 Difference]: Finished difference. Result has 1108 places, 1019 transitions, 2357 flow [2022-11-18 18:33:41,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=1083, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=995, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2357, PETRI_PLACES=1108, PETRI_TRANSITIONS=1019} [2022-11-18 18:33:41,261 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 26 predicate places. [2022-11-18 18:33:41,262 INFO L495 AbstractCegarLoop]: Abstraction has has 1108 places, 1019 transitions, 2357 flow [2022-11-18 18:33:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 969.6111111111111) internal successors, (17453), 18 states have internal predecessors, (17453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:41,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:41,265 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:41,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:41,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:41,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:41,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:41,469 INFO L85 PathProgramCache]: Analyzing trace with hash 822999484, now seen corresponding path program 1 times [2022-11-18 18:33:41,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:41,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257806515] [2022-11-18 18:33:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:41,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:41,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:41,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257806515] [2022-11-18 18:33:41,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257806515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:41,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006688996] [2022-11-18 18:33:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:41,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:41,681 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:41,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-18 18:33:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:43,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:33:43,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:43,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:43,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006688996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:43,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:43,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:33:43,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331026947] [2022-11-18 18:33:43,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:33:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:33:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:33:43,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-18 18:33:43,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1108 places, 1019 transitions, 2357 flow. Second operand has 34 states, 34 states have (on average 969.7941176470588) internal successors, (32973), 34 states have internal predecessors, (32973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:43,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:43,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-18 18:33:43,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:45,591 INFO L130 PetriNetUnfolder]: 0/1529 cut-off events. [2022-11-18 18:33:45,591 INFO L131 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-11-18 18:33:45,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1529 events. 0/1529 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4837 event pairs, 0 based on Foata normal form. 8/1537 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-11-18 18:33:45,593 INFO L137 encePairwiseOnDemand]: 1219/1225 looper letters, 69 selfloop transitions, 45 changer transitions 0/1070 dead transitions. [2022-11-18 18:33:45,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1152 places, 1070 transitions, 2901 flow [2022-11-18 18:33:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:33:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:33:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 43637 transitions. [2022-11-18 18:33:45,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916009070294785 [2022-11-18 18:33:45,613 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 43637 transitions. [2022-11-18 18:33:45,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 43637 transitions. [2022-11-18 18:33:45,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:45,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 43637 transitions. [2022-11-18 18:33:45,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 969.7111111111111) internal successors, (43637), 45 states have internal predecessors, (43637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:45,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1225.0) internal successors, (56350), 46 states have internal predecessors, (56350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:45,674 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1225.0) internal successors, (56350), 46 states have internal predecessors, (56350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:45,674 INFO L175 Difference]: Start difference. First operand has 1108 places, 1019 transitions, 2357 flow. Second operand 45 states and 43637 transitions. [2022-11-18 18:33:45,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1152 places, 1070 transitions, 2901 flow [2022-11-18 18:33:45,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1146 places, 1070 transitions, 2861 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:33:45,688 INFO L231 Difference]: Finished difference. Result has 1155 places, 1044 transitions, 2635 flow [2022-11-18 18:33:45,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=1102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=996, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2635, PETRI_PLACES=1155, PETRI_TRANSITIONS=1044} [2022-11-18 18:33:45,689 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 73 predicate places. [2022-11-18 18:33:45,689 INFO L495 AbstractCegarLoop]: Abstraction has has 1155 places, 1044 transitions, 2635 flow [2022-11-18 18:33:45,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 969.7941176470588) internal successors, (32973), 34 states have internal predecessors, (32973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:45,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:45,692 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:45,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-11-18 18:33:45,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:45,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash 823870896, now seen corresponding path program 1 times [2022-11-18 18:33:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:45,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208487697] [2022-11-18 18:33:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:45,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:46,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208487697] [2022-11-18 18:33:46,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208487697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:46,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819393854] [2022-11-18 18:33:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:46,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:46,499 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:46,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-11-18 18:33:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:33:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:48,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:49,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819393854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:49,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:33:49,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:33:49,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517517826] [2022-11-18 18:33:49,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:49,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:33:49,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:49,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:33:49,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:33:49,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-18 18:33:49,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1155 places, 1044 transitions, 2635 flow. Second operand has 66 states, 66 states have (on average 969.8939393939394) internal successors, (64013), 66 states have internal predecessors, (64013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:49,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:33:49,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-18 18:33:49,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:33:52,863 INFO L130 PetriNetUnfolder]: 0/1353 cut-off events. [2022-11-18 18:33:52,864 INFO L131 PetriNetUnfolder]: For 2708/2708 co-relation queries the response was YES. [2022-11-18 18:33:52,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2365 conditions, 1353 events. 0/1353 cut-off events. For 2708/2708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3666 event pairs, 0 based on Foata normal form. 16/1369 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-18 18:33:52,865 INFO L137 encePairwiseOnDemand]: 1219/1225 looper letters, 101 selfloop transitions, 93 changer transitions 0/1150 dead transitions. [2022-11-18 18:33:52,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1247 places, 1150 transitions, 3871 flow [2022-11-18 18:33:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:33:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:33:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 90141 transitions. [2022-11-18 18:33:52,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791231073074391 [2022-11-18 18:33:52,901 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 90141 transitions. [2022-11-18 18:33:52,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 90141 transitions. [2022-11-18 18:33:52,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:33:52,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 90141 transitions. [2022-11-18 18:33:52,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 969.258064516129) internal successors, (90141), 93 states have internal predecessors, (90141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:53,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1225.0) internal successors, (115150), 94 states have internal predecessors, (115150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:53,029 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1225.0) internal successors, (115150), 94 states have internal predecessors, (115150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:53,029 INFO L175 Difference]: Start difference. First operand has 1155 places, 1044 transitions, 2635 flow. Second operand 93 states and 90141 transitions. [2022-11-18 18:33:53,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1247 places, 1150 transitions, 3871 flow [2022-11-18 18:33:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1229 places, 1150 transitions, 3783 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:33:53,050 INFO L231 Difference]: Finished difference. Result has 1246 places, 1093 transitions, 3269 flow [2022-11-18 18:33:53,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=1137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3269, PETRI_PLACES=1246, PETRI_TRANSITIONS=1093} [2022-11-18 18:33:53,051 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 164 predicate places. [2022-11-18 18:33:53,051 INFO L495 AbstractCegarLoop]: Abstraction has has 1246 places, 1093 transitions, 3269 flow [2022-11-18 18:33:53,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 969.8939393939394) internal successors, (64013), 66 states have internal predecessors, (64013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:53,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:33:53,057 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:53,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-11-18 18:33:53,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:53,258 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:33:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:53,258 INFO L85 PathProgramCache]: Analyzing trace with hash 689110616, now seen corresponding path program 1 times [2022-11-18 18:33:53,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:53,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434416877] [2022-11-18 18:33:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:53,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:55,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:55,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434416877] [2022-11-18 18:33:55,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434416877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:55,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080573982] [2022-11-18 18:33:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:55,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:55,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:55,499 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:55,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-18 18:33:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:33:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:57,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:01,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080573982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:01,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:01,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:34:01,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612428657] [2022-11-18 18:34:01,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:01,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:34:01,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:34:01,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:34:01,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-18 18:34:01,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1246 places, 1093 transitions, 3269 flow. Second operand has 130 states, 130 states have (on average 969.9461538461538) internal successors, (126093), 130 states have internal predecessors, (126093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:01,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:01,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-18 18:34:01,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:05,842 INFO L130 PetriNetUnfolder]: 0/1298 cut-off events. [2022-11-18 18:34:05,843 INFO L131 PetriNetUnfolder]: For 3183/3183 co-relation queries the response was YES. [2022-11-18 18:34:05,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 1298 events. 0/1298 cut-off events. For 3183/3183 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3325 event pairs, 0 based on Foata normal form. 5/1303 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-18 18:34:05,845 INFO L137 encePairwiseOnDemand]: 1220/1225 looper letters, 108 selfloop transitions, 106 changer transitions 0/1160 dead transitions. [2022-11-18 18:34:05,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1342 places, 1160 transitions, 4247 flow [2022-11-18 18:34:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-18 18:34:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-11-18 18:34:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 104655 transitions. [2022-11-18 18:34:05,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7910430839002267 [2022-11-18 18:34:05,892 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 104655 transitions. [2022-11-18 18:34:05,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 104655 transitions. [2022-11-18 18:34:05,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:05,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 104655 transitions. [2022-11-18 18:34:05,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 969.0277777777778) internal successors, (104655), 108 states have internal predecessors, (104655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:06,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 1225.0) internal successors, (133525), 109 states have internal predecessors, (133525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:06,052 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 1225.0) internal successors, (133525), 109 states have internal predecessors, (133525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:06,052 INFO L175 Difference]: Start difference. First operand has 1246 places, 1093 transitions, 3269 flow. Second operand 108 states and 104655 transitions. [2022-11-18 18:34:06,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1342 places, 1160 transitions, 4247 flow [2022-11-18 18:34:06,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1269 places, 1160 transitions, 3885 flow, removed 22 selfloop flow, removed 73 redundant places. [2022-11-18 18:34:06,077 INFO L231 Difference]: Finished difference. Result has 1269 places, 1094 transitions, 3249 flow [2022-11-18 18:34:06,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=3249, PETRI_PLACES=1269, PETRI_TRANSITIONS=1094} [2022-11-18 18:34:06,078 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 187 predicate places. [2022-11-18 18:34:06,078 INFO L495 AbstractCegarLoop]: Abstraction has has 1269 places, 1094 transitions, 3249 flow [2022-11-18 18:34:06,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 969.9461538461538) internal successors, (126093), 130 states have internal predecessors, (126093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:06,089 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:06,089 INFO L209 CegarLoopForPetriNet]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:06,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-11-18 18:34:06,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:06,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash 136835266, now seen corresponding path program 1 times [2022-11-18 18:34:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:06,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295259510] [2022-11-18 18:34:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:06,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:34:06,357 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:34:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:34:06,525 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:34:06,525 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:34:06,525 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:34:06,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:34:06,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2022-11-18 18:34:06,526 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:06,526 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:34:06,526 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2022-11-18 18:34:06,627 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:34:06,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1111 places, 1258 transitions, 3956 flow [2022-11-18 18:34:09,082 INFO L130 PetriNetUnfolder]: 364/2549 cut-off events. [2022-11-18 18:34:09,083 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2022-11-18 18:34:09,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3324 conditions, 2549 events. 364/2549 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9359 event pairs, 0 based on Foata normal form. 0/2111 useless extension candidates. Maximal degree in co-relation 3188. Up to 74 conditions per place. [2022-11-18 18:34:09,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 1111 places, 1258 transitions, 3956 flow [2022-11-18 18:34:09,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1111 places, 1258 transitions, 3956 flow [2022-11-18 18:34:09,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:34:09,239 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:34:09,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:34:09,244 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:34:09,244 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:34:09,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:09,244 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:09,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash 550735130, now seen corresponding path program 1 times [2022-11-18 18:34:09,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:09,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226804336] [2022-11-18 18:34:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:09,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:09,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:09,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226804336] [2022-11-18 18:34:09,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226804336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:09,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:09,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:34:09,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090482000] [2022-11-18 18:34:09,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:09,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:34:09,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:09,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:34:09,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:34:09,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1001 out of 1258 [2022-11-18 18:34:09,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 1258 transitions, 3956 flow. Second operand has 2 states, 2 states have (on average 1001.5) internal successors, (2003), 2 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:09,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:09,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1001 of 1258 [2022-11-18 18:34:09,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:11,079 INFO L130 PetriNetUnfolder]: 0/2148 cut-off events. [2022-11-18 18:34:11,079 INFO L131 PetriNetUnfolder]: For 9066/9066 co-relation queries the response was YES. [2022-11-18 18:34:11,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 2148 events. 0/2148 cut-off events. For 9066/9066 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8804 event pairs, 0 based on Foata normal form. 3936/6010 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-11-18 18:34:11,084 INFO L137 encePairwiseOnDemand]: 1038/1258 looper letters, 36 selfloop transitions, 0 changer transitions 11/1037 dead transitions. [2022-11-18 18:34:11,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1111 places, 1037 transitions, 3586 flow [2022-11-18 18:34:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:34:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:34:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2258 transitions. [2022-11-18 18:34:11,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8974562798092209 [2022-11-18 18:34:11,086 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2258 transitions. [2022-11-18 18:34:11,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2258 transitions. [2022-11-18 18:34:11,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:11,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2258 transitions. [2022-11-18 18:34:11,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1129.0) internal successors, (2258), 2 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:11,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1258.0) internal successors, (3774), 3 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:11,090 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1258.0) internal successors, (3774), 3 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:11,090 INFO L175 Difference]: Start difference. First operand has 1111 places, 1258 transitions, 3956 flow. Second operand 2 states and 2258 transitions. [2022-11-18 18:34:11,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1111 places, 1037 transitions, 3586 flow [2022-11-18 18:34:11,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1111 places, 1037 transitions, 2326 flow, removed 630 selfloop flow, removed 0 redundant places. [2022-11-18 18:34:11,117 INFO L231 Difference]: Finished difference. Result has 1111 places, 1026 transitions, 2232 flow [2022-11-18 18:34:11,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=1110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1037, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2232, PETRI_PLACES=1111, PETRI_TRANSITIONS=1026} [2022-11-18 18:34:11,118 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 0 predicate places. [2022-11-18 18:34:11,118 INFO L495 AbstractCegarLoop]: Abstraction has has 1111 places, 1026 transitions, 2232 flow [2022-11-18 18:34:11,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1001.5) internal successors, (2003), 2 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:11,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:11,119 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:11,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2022-11-18 18:34:11,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:11,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1246216229, now seen corresponding path program 1 times [2022-11-18 18:34:11,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:11,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929273688] [2022-11-18 18:34:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:11,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:11,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:11,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929273688] [2022-11-18 18:34:11,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929273688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:11,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:11,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:34:11,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853655826] [2022-11-18 18:34:11,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:11,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:11,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:11,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:11,156 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 994 out of 1258 [2022-11-18 18:34:11,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 1026 transitions, 2232 flow. Second operand has 3 states, 3 states have (on average 995.0) internal successors, (2985), 3 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:11,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:11,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 994 of 1258 [2022-11-18 18:34:11,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:12,836 INFO L130 PetriNetUnfolder]: 0/1730 cut-off events. [2022-11-18 18:34:12,836 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-18 18:34:12,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 1730 events. 0/1730 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6016 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 0. Up to 216 conditions per place. [2022-11-18 18:34:12,841 INFO L137 encePairwiseOnDemand]: 1255/1258 looper letters, 45 selfloop transitions, 2 changer transitions 0/1030 dead transitions. [2022-11-18 18:34:12,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 1030 transitions, 2334 flow [2022-11-18 18:34:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:34:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3030 transitions. [2022-11-18 18:34:12,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8028616852146264 [2022-11-18 18:34:12,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3030 transitions. [2022-11-18 18:34:12,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3030 transitions. [2022-11-18 18:34:12,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:12,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3030 transitions. [2022-11-18 18:34:12,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1010.0) internal successors, (3030), 3 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:12,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1258.0) internal successors, (5032), 4 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:12,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1258.0) internal successors, (5032), 4 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:12,849 INFO L175 Difference]: Start difference. First operand has 1111 places, 1026 transitions, 2232 flow. Second operand 3 states and 3030 transitions. [2022-11-18 18:34:12,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 1030 transitions, 2334 flow [2022-11-18 18:34:12,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1102 places, 1030 transitions, 2334 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:34:12,860 INFO L231 Difference]: Finished difference. Result has 1103 places, 1027 transitions, 2244 flow [2022-11-18 18:34:12,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=1100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2244, PETRI_PLACES=1103, PETRI_TRANSITIONS=1027} [2022-11-18 18:34:12,861 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, -8 predicate places. [2022-11-18 18:34:12,861 INFO L495 AbstractCegarLoop]: Abstraction has has 1103 places, 1027 transitions, 2244 flow [2022-11-18 18:34:12,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 995.0) internal successors, (2985), 3 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:12,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:12,862 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:12,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2022-11-18 18:34:12,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:12,863 INFO L85 PathProgramCache]: Analyzing trace with hash 338019023, now seen corresponding path program 1 times [2022-11-18 18:34:12,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:12,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617218311] [2022-11-18 18:34:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:12,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:12,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617218311] [2022-11-18 18:34:12,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617218311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064739055] [2022-11-18 18:34:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:12,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:12,914 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:12,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-18 18:34:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:14,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:34:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:14,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:14,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064739055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:14,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:14,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:34:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264162409] [2022-11-18 18:34:14,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:14,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:34:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:34:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:34:14,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-18 18:34:14,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 1027 transitions, 2244 flow. Second operand has 10 states, 10 states have (on average 995.3) internal successors, (9953), 10 states have internal predecessors, (9953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:14,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:14,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-18 18:34:14,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:16,026 INFO L130 PetriNetUnfolder]: 0/1708 cut-off events. [2022-11-18 18:34:16,026 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-18 18:34:16,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2183 conditions, 1708 events. 0/1708 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5884 event pairs, 0 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2022-11-18 18:34:16,029 INFO L137 encePairwiseOnDemand]: 1252/1258 looper letters, 46 selfloop transitions, 9 changer transitions 0/1037 dead transitions. [2022-11-18 18:34:16,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1111 places, 1037 transitions, 2376 flow [2022-11-18 18:34:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:34:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:34:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8994 transitions. [2022-11-18 18:34:16,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7943826179120297 [2022-11-18 18:34:16,035 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8994 transitions. [2022-11-18 18:34:16,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8994 transitions. [2022-11-18 18:34:16,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:16,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8994 transitions. [2022-11-18 18:34:16,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 999.3333333333334) internal successors, (8994), 9 states have internal predecessors, (8994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:16,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1258.0) internal successors, (12580), 10 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:16,049 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1258.0) internal successors, (12580), 10 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:16,049 INFO L175 Difference]: Start difference. First operand has 1103 places, 1027 transitions, 2244 flow. Second operand 9 states and 8994 transitions. [2022-11-18 18:34:16,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1111 places, 1037 transitions, 2376 flow [2022-11-18 18:34:16,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1110 places, 1037 transitions, 2374 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:34:16,060 INFO L231 Difference]: Finished difference. Result has 1113 places, 1033 transitions, 2292 flow [2022-11-18 18:34:16,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=1102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2292, PETRI_PLACES=1113, PETRI_TRANSITIONS=1033} [2022-11-18 18:34:16,061 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 2 predicate places. [2022-11-18 18:34:16,061 INFO L495 AbstractCegarLoop]: Abstraction has has 1113 places, 1033 transitions, 2292 flow [2022-11-18 18:34:16,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 995.3) internal successors, (9953), 10 states have internal predecessors, (9953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:16,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:16,062 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:16,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:16,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:16,263 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1977978246, now seen corresponding path program 1 times [2022-11-18 18:34:16,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:16,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947500072] [2022-11-18 18:34:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:16,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:16,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:16,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947500072] [2022-11-18 18:34:16,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947500072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:16,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262520976] [2022-11-18 18:34:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:16,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:16,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:16,347 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:16,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-18 18:34:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:17,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:34:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:17,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:17,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262520976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:17,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:17,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:34:17,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380117595] [2022-11-18 18:34:17,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:17,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:34:17,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:34:17,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:34:17,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-18 18:34:17,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1113 places, 1033 transitions, 2292 flow. Second operand has 18 states, 18 states have (on average 995.6111111111111) internal successors, (17921), 18 states have internal predecessors, (17921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:17,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:17,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-18 18:34:17,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:19,896 INFO L130 PetriNetUnfolder]: 0/1664 cut-off events. [2022-11-18 18:34:19,896 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-18 18:34:19,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 1664 events. 0/1664 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5592 event pairs, 0 based on Foata normal form. 4/1668 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-11-18 18:34:19,900 INFO L137 encePairwiseOnDemand]: 1252/1258 looper letters, 54 selfloop transitions, 21 changer transitions 0/1057 dead transitions. [2022-11-18 18:34:19,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1133 places, 1057 transitions, 2550 flow [2022-11-18 18:34:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:34:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:34:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20932 transitions. [2022-11-18 18:34:19,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7923385570444395 [2022-11-18 18:34:19,913 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20932 transitions. [2022-11-18 18:34:19,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20932 transitions. [2022-11-18 18:34:19,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:19,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20932 transitions. [2022-11-18 18:34:19,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 996.7619047619048) internal successors, (20932), 21 states have internal predecessors, (20932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:19,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1258.0) internal successors, (27676), 22 states have internal predecessors, (27676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:19,946 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1258.0) internal successors, (27676), 22 states have internal predecessors, (27676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:19,946 INFO L175 Difference]: Start difference. First operand has 1113 places, 1033 transitions, 2292 flow. Second operand 21 states and 20932 transitions. [2022-11-18 18:34:19,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1133 places, 1057 transitions, 2550 flow [2022-11-18 18:34:19,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1132 places, 1057 transitions, 2536 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:34:19,959 INFO L231 Difference]: Finished difference. Result has 1137 places, 1046 transitions, 2416 flow [2022-11-18 18:34:19,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=1112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1022, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2416, PETRI_PLACES=1137, PETRI_TRANSITIONS=1046} [2022-11-18 18:34:19,960 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 26 predicate places. [2022-11-18 18:34:19,960 INFO L495 AbstractCegarLoop]: Abstraction has has 1137 places, 1046 transitions, 2416 flow [2022-11-18 18:34:19,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 995.6111111111111) internal successors, (17921), 18 states have internal predecessors, (17921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:19,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:19,963 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:19,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:20,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1869367844, now seen corresponding path program 1 times [2022-11-18 18:34:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:20,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989656881] [2022-11-18 18:34:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:20,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989656881] [2022-11-18 18:34:20,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989656881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:20,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451488471] [2022-11-18 18:34:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:20,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:20,361 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:20,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-11-18 18:34:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:21,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:34:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:21,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:22,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451488471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:22,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:22,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:34:22,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782097189] [2022-11-18 18:34:22,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:22,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:34:22,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:34:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:34:22,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-18 18:34:22,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1137 places, 1046 transitions, 2416 flow. Second operand has 34 states, 34 states have (on average 995.7941176470588) internal successors, (33857), 34 states have internal predecessors, (33857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:22,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:22,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-18 18:34:22,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:24,442 INFO L130 PetriNetUnfolder]: 0/1576 cut-off events. [2022-11-18 18:34:24,442 INFO L131 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2022-11-18 18:34:24,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1576 events. 0/1576 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5008 event pairs, 0 based on Foata normal form. 8/1584 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-11-18 18:34:24,445 INFO L137 encePairwiseOnDemand]: 1252/1258 looper letters, 70 selfloop transitions, 45 changer transitions 0/1097 dead transitions. [2022-11-18 18:34:24,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1181 places, 1097 transitions, 2962 flow [2022-11-18 18:34:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:34:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:34:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 44808 transitions. [2022-11-18 18:34:24,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7915209326974033 [2022-11-18 18:34:24,467 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 44808 transitions. [2022-11-18 18:34:24,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 44808 transitions. [2022-11-18 18:34:24,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:24,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 44808 transitions. [2022-11-18 18:34:24,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 995.7333333333333) internal successors, (44808), 45 states have internal predecessors, (44808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:24,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1258.0) internal successors, (57868), 46 states have internal predecessors, (57868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:24,534 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1258.0) internal successors, (57868), 46 states have internal predecessors, (57868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:24,534 INFO L175 Difference]: Start difference. First operand has 1137 places, 1046 transitions, 2416 flow. Second operand 45 states and 44808 transitions. [2022-11-18 18:34:24,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1181 places, 1097 transitions, 2962 flow [2022-11-18 18:34:24,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1175 places, 1097 transitions, 2922 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:34:24,551 INFO L231 Difference]: Finished difference. Result has 1184 places, 1071 transitions, 2694 flow [2022-11-18 18:34:24,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=1131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1023, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2694, PETRI_PLACES=1184, PETRI_TRANSITIONS=1071} [2022-11-18 18:34:24,551 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 73 predicate places. [2022-11-18 18:34:24,552 INFO L495 AbstractCegarLoop]: Abstraction has has 1184 places, 1071 transitions, 2694 flow [2022-11-18 18:34:24,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 995.7941176470588) internal successors, (33857), 34 states have internal predecessors, (33857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:24,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:24,555 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:24,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-11-18 18:34:24,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:24,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1654666448, now seen corresponding path program 1 times [2022-11-18 18:34:24,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:24,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453968447] [2022-11-18 18:34:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:24,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:25,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:25,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453968447] [2022-11-18 18:34:25,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453968447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:25,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213647530] [2022-11-18 18:34:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:25,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:25,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:25,358 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:25,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-18 18:34:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:26,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:34:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:26,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:27,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213647530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:27,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:27,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:34:27,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863737943] [2022-11-18 18:34:27,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:27,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:34:27,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:27,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:34:27,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:34:28,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-18 18:34:28,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1184 places, 1071 transitions, 2694 flow. Second operand has 66 states, 66 states have (on average 995.8939393939394) internal successors, (65729), 66 states have internal predecessors, (65729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:28,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:28,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-18 18:34:28,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:31,780 INFO L130 PetriNetUnfolder]: 0/1400 cut-off events. [2022-11-18 18:34:31,780 INFO L131 PetriNetUnfolder]: For 2829/2829 co-relation queries the response was YES. [2022-11-18 18:34:31,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 1400 events. 0/1400 cut-off events. For 2829/2829 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3842 event pairs, 0 based on Foata normal form. 16/1416 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2022-11-18 18:34:31,782 INFO L137 encePairwiseOnDemand]: 1252/1258 looper letters, 102 selfloop transitions, 93 changer transitions 0/1177 dead transitions. [2022-11-18 18:34:31,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1276 places, 1177 transitions, 3932 flow [2022-11-18 18:34:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:34:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:34:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 92560 transitions. [2022-11-18 18:34:31,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911516829922902 [2022-11-18 18:34:31,818 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 92560 transitions. [2022-11-18 18:34:31,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 92560 transitions. [2022-11-18 18:34:31,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:31,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 92560 transitions. [2022-11-18 18:34:31,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 995.2688172043011) internal successors, (92560), 93 states have internal predecessors, (92560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:31,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1258.0) internal successors, (118252), 94 states have internal predecessors, (118252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:31,948 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1258.0) internal successors, (118252), 94 states have internal predecessors, (118252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:31,948 INFO L175 Difference]: Start difference. First operand has 1184 places, 1071 transitions, 2694 flow. Second operand 93 states and 92560 transitions. [2022-11-18 18:34:31,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1276 places, 1177 transitions, 3932 flow [2022-11-18 18:34:31,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1258 places, 1177 transitions, 3844 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:34:31,971 INFO L231 Difference]: Finished difference. Result has 1275 places, 1120 transitions, 3328 flow [2022-11-18 18:34:31,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=1166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3328, PETRI_PLACES=1275, PETRI_TRANSITIONS=1120} [2022-11-18 18:34:31,972 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 164 predicate places. [2022-11-18 18:34:31,972 INFO L495 AbstractCegarLoop]: Abstraction has has 1275 places, 1120 transitions, 3328 flow [2022-11-18 18:34:31,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 995.8939393939394) internal successors, (65729), 66 states have internal predecessors, (65729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:31,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:31,977 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:31,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:32,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-11-18 18:34:32,178 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash -319007880, now seen corresponding path program 1 times [2022-11-18 18:34:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:32,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709175968] [2022-11-18 18:34:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:32,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:34,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:34,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709175968] [2022-11-18 18:34:34,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709175968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:34,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387971097] [2022-11-18 18:34:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:34,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:34,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:34,436 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:34,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-18 18:34:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:34:35,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:36,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:40,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387971097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:40,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:40,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:34:40,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192962271] [2022-11-18 18:34:40,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:40,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:34:40,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:40,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:34:40,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:34:40,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-18 18:34:40,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1275 places, 1120 transitions, 3328 flow. Second operand has 130 states, 130 states have (on average 995.9461538461538) internal successors, (129473), 130 states have internal predecessors, (129473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:40,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:40,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-18 18:34:40,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:44,921 INFO L130 PetriNetUnfolder]: 0/1334 cut-off events. [2022-11-18 18:34:44,921 INFO L131 PetriNetUnfolder]: For 3680/3680 co-relation queries the response was YES. [2022-11-18 18:34:44,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 1334 events. 0/1334 cut-off events. For 3680/3680 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3423 event pairs, 0 based on Foata normal form. 6/1340 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2022-11-18 18:34:44,924 INFO L137 encePairwiseOnDemand]: 1253/1258 looper letters, 111 selfloop transitions, 109 changer transitions 0/1192 dead transitions. [2022-11-18 18:34:44,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1374 places, 1192 transitions, 4372 flow [2022-11-18 18:34:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-18 18:34:44,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-11-18 18:34:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 110449 transitions. [2022-11-18 18:34:44,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7909666423179936 [2022-11-18 18:34:44,971 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 110449 transitions. [2022-11-18 18:34:44,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 110449 transitions. [2022-11-18 18:34:44,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:44,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 110449 transitions. [2022-11-18 18:34:45,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 995.0360360360361) internal successors, (110449), 111 states have internal predecessors, (110449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:45,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 1258.0) internal successors, (140896), 112 states have internal predecessors, (140896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:45,139 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 1258.0) internal successors, (140896), 112 states have internal predecessors, (140896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:45,139 INFO L175 Difference]: Start difference. First operand has 1275 places, 1120 transitions, 3328 flow. Second operand 111 states and 110449 transitions. [2022-11-18 18:34:45,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1374 places, 1192 transitions, 4372 flow [2022-11-18 18:34:45,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1301 places, 1192 transitions, 4000 flow, removed 23 selfloop flow, removed 73 redundant places. [2022-11-18 18:34:45,164 INFO L231 Difference]: Finished difference. Result has 1301 places, 1124 transitions, 3342 flow [2022-11-18 18:34:45,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=1191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=3342, PETRI_PLACES=1301, PETRI_TRANSITIONS=1124} [2022-11-18 18:34:45,165 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 190 predicate places. [2022-11-18 18:34:45,165 INFO L495 AbstractCegarLoop]: Abstraction has has 1301 places, 1124 transitions, 3342 flow [2022-11-18 18:34:45,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 995.9461538461538) internal successors, (129473), 130 states have internal predecessors, (129473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:45,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:45,179 INFO L209 CegarLoopForPetriNet]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:45,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-18 18:34:45,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:45,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash -88585383, now seen corresponding path program 1 times [2022-11-18 18:34:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:45,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228509919] [2022-11-18 18:34:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:34:45,444 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:34:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:34:45,563 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:34:45,563 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:34:45,563 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:34:45,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:34:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2022-11-18 18:34:45,563 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:45,564 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:34:45,564 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2022-11-18 18:34:45,655 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:34:45,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1140 places, 1291 transitions, 4099 flow [2022-11-18 18:34:47,914 INFO L130 PetriNetUnfolder]: 374/2618 cut-off events. [2022-11-18 18:34:47,914 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2022-11-18 18:34:48,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3433 conditions, 2618 events. 374/2618 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9652 event pairs, 0 based on Foata normal form. 0/2168 useless extension candidates. Maximal degree in co-relation 3296. Up to 76 conditions per place. [2022-11-18 18:34:48,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 1140 places, 1291 transitions, 4099 flow [2022-11-18 18:34:48,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1140 places, 1291 transitions, 4099 flow [2022-11-18 18:34:48,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:34:48,102 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:34:48,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:34:48,106 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:34:48,106 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:34:48,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:48,106 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:48,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1808302938, now seen corresponding path program 1 times [2022-11-18 18:34:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:48,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311744859] [2022-11-18 18:34:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:48,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311744859] [2022-11-18 18:34:48,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311744859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:48,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:48,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:34:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992394581] [2022-11-18 18:34:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:34:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:34:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:34:48,136 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1027 out of 1291 [2022-11-18 18:34:48,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1140 places, 1291 transitions, 4099 flow. Second operand has 2 states, 2 states have (on average 1027.5) internal successors, (2055), 2 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:48,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:48,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1027 of 1291 [2022-11-18 18:34:48,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:50,263 INFO L130 PetriNetUnfolder]: 0/2206 cut-off events. [2022-11-18 18:34:50,263 INFO L131 PetriNetUnfolder]: For 9805/9805 co-relation queries the response was YES. [2022-11-18 18:34:50,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 2206 events. 0/2206 cut-off events. For 9805/9805 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 9051 event pairs, 0 based on Foata normal form. 4156/6286 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-11-18 18:34:50,268 INFO L137 encePairwiseOnDemand]: 1065/1291 looper letters, 37 selfloop transitions, 0 changer transitions 11/1064 dead transitions. [2022-11-18 18:34:50,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1140 places, 1064 transitions, 3719 flow [2022-11-18 18:34:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:34:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:34:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2317 transitions. [2022-11-18 18:34:50,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8973663826491092 [2022-11-18 18:34:50,271 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2317 transitions. [2022-11-18 18:34:50,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2317 transitions. [2022-11-18 18:34:50,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:50,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2317 transitions. [2022-11-18 18:34:50,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1158.5) internal successors, (2317), 2 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:50,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1291.0) internal successors, (3873), 3 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:50,274 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1291.0) internal successors, (3873), 3 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:50,274 INFO L175 Difference]: Start difference. First operand has 1140 places, 1291 transitions, 4099 flow. Second operand 2 states and 2317 transitions. [2022-11-18 18:34:50,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1140 places, 1064 transitions, 3719 flow [2022-11-18 18:34:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1140 places, 1064 transitions, 2387 flow, removed 666 selfloop flow, removed 0 redundant places. [2022-11-18 18:34:50,301 INFO L231 Difference]: Finished difference. Result has 1140 places, 1053 transitions, 2291 flow [2022-11-18 18:34:50,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=1139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2291, PETRI_PLACES=1140, PETRI_TRANSITIONS=1053} [2022-11-18 18:34:50,302 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 0 predicate places. [2022-11-18 18:34:50,302 INFO L495 AbstractCegarLoop]: Abstraction has has 1140 places, 1053 transitions, 2291 flow [2022-11-18 18:34:50,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1027.5) internal successors, (2055), 2 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:50,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:50,302 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2022-11-18 18:34:50,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 11351579, now seen corresponding path program 1 times [2022-11-18 18:34:50,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:50,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083989531] [2022-11-18 18:34:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:50,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083989531] [2022-11-18 18:34:50,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083989531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:50,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:50,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:34:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538787458] [2022-11-18 18:34:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:50,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:50,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:50,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1020 out of 1291 [2022-11-18 18:34:50,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1140 places, 1053 transitions, 2291 flow. Second operand has 3 states, 3 states have (on average 1021.0) internal successors, (3063), 3 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:50,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:50,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1020 of 1291 [2022-11-18 18:34:50,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:52,068 INFO L130 PetriNetUnfolder]: 0/1777 cut-off events. [2022-11-18 18:34:52,068 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-18 18:34:52,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2154 conditions, 1777 events. 0/1777 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6185 event pairs, 0 based on Foata normal form. 0/1740 useless extension candidates. Maximal degree in co-relation 0. Up to 222 conditions per place. [2022-11-18 18:34:52,072 INFO L137 encePairwiseOnDemand]: 1288/1291 looper letters, 46 selfloop transitions, 2 changer transitions 0/1057 dead transitions. [2022-11-18 18:34:52,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 1057 transitions, 2395 flow [2022-11-18 18:34:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:34:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3109 transitions. [2022-11-18 18:34:52,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8027368964626904 [2022-11-18 18:34:52,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3109 transitions. [2022-11-18 18:34:52,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3109 transitions. [2022-11-18 18:34:52,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:52,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3109 transitions. [2022-11-18 18:34:52,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1036.3333333333333) internal successors, (3109), 3 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:52,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:52,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:52,080 INFO L175 Difference]: Start difference. First operand has 1140 places, 1053 transitions, 2291 flow. Second operand 3 states and 3109 transitions. [2022-11-18 18:34:52,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 1057 transitions, 2395 flow [2022-11-18 18:34:52,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1131 places, 1057 transitions, 2395 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:34:52,089 INFO L231 Difference]: Finished difference. Result has 1132 places, 1054 transitions, 2303 flow [2022-11-18 18:34:52,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=1129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2303, PETRI_PLACES=1132, PETRI_TRANSITIONS=1054} [2022-11-18 18:34:52,090 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, -8 predicate places. [2022-11-18 18:34:52,090 INFO L495 AbstractCegarLoop]: Abstraction has has 1132 places, 1054 transitions, 2303 flow [2022-11-18 18:34:52,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1021.0) internal successors, (3063), 3 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:52,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:52,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2022-11-18 18:34:52,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2043305999, now seen corresponding path program 1 times [2022-11-18 18:34:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:52,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696674382] [2022-11-18 18:34:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:52,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:52,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696674382] [2022-11-18 18:34:52,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696674382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:52,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935784766] [2022-11-18 18:34:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:52,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:52,144 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:52,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-18 18:34:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:34:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:53,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:53,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935784766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:53,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:53,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:34:53,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265165566] [2022-11-18 18:34:53,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:53,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:34:53,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:34:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:34:53,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-18 18:34:53,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1132 places, 1054 transitions, 2303 flow. Second operand has 10 states, 10 states have (on average 1021.3) internal successors, (10213), 10 states have internal predecessors, (10213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:53,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:53,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-18 18:34:53,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:55,577 INFO L130 PetriNetUnfolder]: 0/1755 cut-off events. [2022-11-18 18:34:55,577 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-18 18:34:55,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 1755 events. 0/1755 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6022 event pairs, 0 based on Foata normal form. 2/1757 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2022-11-18 18:34:55,582 INFO L137 encePairwiseOnDemand]: 1285/1291 looper letters, 47 selfloop transitions, 9 changer transitions 0/1064 dead transitions. [2022-11-18 18:34:55,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1140 places, 1064 transitions, 2437 flow [2022-11-18 18:34:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:34:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:34:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9229 transitions. [2022-11-18 18:34:55,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7943024356657199 [2022-11-18 18:34:55,589 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9229 transitions. [2022-11-18 18:34:55,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9229 transitions. [2022-11-18 18:34:55,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:55,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9229 transitions. [2022-11-18 18:34:55,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1025.4444444444443) internal successors, (9229), 9 states have internal predecessors, (9229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:55,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1291.0) internal successors, (12910), 10 states have internal predecessors, (12910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:55,603 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1291.0) internal successors, (12910), 10 states have internal predecessors, (12910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:55,603 INFO L175 Difference]: Start difference. First operand has 1132 places, 1054 transitions, 2303 flow. Second operand 9 states and 9229 transitions. [2022-11-18 18:34:55,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1140 places, 1064 transitions, 2437 flow [2022-11-18 18:34:55,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1139 places, 1064 transitions, 2435 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:34:55,614 INFO L231 Difference]: Finished difference. Result has 1142 places, 1060 transitions, 2351 flow [2022-11-18 18:34:55,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=1131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2351, PETRI_PLACES=1142, PETRI_TRANSITIONS=1060} [2022-11-18 18:34:55,615 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 2 predicate places. [2022-11-18 18:34:55,615 INFO L495 AbstractCegarLoop]: Abstraction has has 1142 places, 1060 transitions, 2351 flow [2022-11-18 18:34:55,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1021.3) internal successors, (10213), 10 states have internal predecessors, (10213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:55,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:55,616 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:55,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-11-18 18:34:55,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-11-18 18:34:55,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1583342150, now seen corresponding path program 1 times [2022-11-18 18:34:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:55,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264064367] [2022-11-18 18:34:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:55,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:55,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264064367] [2022-11-18 18:34:55,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264064367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:55,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061814818] [2022-11-18 18:34:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:55,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:55,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:55,900 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:55,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-11-18 18:34:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:34:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:57,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:57,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061814818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:57,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:57,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:34:57,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197393175] [2022-11-18 18:34:57,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:57,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:34:57,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:57,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:34:57,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:34:57,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-18 18:34:57,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1142 places, 1060 transitions, 2351 flow. Second operand has 18 states, 18 states have (on average 1021.6111111111111) internal successors, (18389), 18 states have internal predecessors, (18389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:57,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:57,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-18 18:34:57,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:34:59,390 INFO L130 PetriNetUnfolder]: 0/1711 cut-off events. [2022-11-18 18:34:59,391 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-18 18:34:59,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1711 events. 0/1711 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5734 event pairs, 0 based on Foata normal form. 4/1715 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-11-18 18:34:59,395 INFO L137 encePairwiseOnDemand]: 1285/1291 looper letters, 55 selfloop transitions, 21 changer transitions 0/1084 dead transitions. [2022-11-18 18:34:59,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1162 places, 1084 transitions, 2611 flow [2022-11-18 18:34:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:34:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:34:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21479 transitions. [2022-11-18 18:34:59,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922614436944414 [2022-11-18 18:34:59,407 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 21479 transitions. [2022-11-18 18:34:59,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 21479 transitions. [2022-11-18 18:34:59,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:34:59,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 21479 transitions. [2022-11-18 18:34:59,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1022.8095238095239) internal successors, (21479), 21 states have internal predecessors, (21479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:59,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1291.0) internal successors, (28402), 22 states have internal predecessors, (28402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:59,438 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1291.0) internal successors, (28402), 22 states have internal predecessors, (28402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:59,438 INFO L175 Difference]: Start difference. First operand has 1142 places, 1060 transitions, 2351 flow. Second operand 21 states and 21479 transitions. [2022-11-18 18:34:59,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1162 places, 1084 transitions, 2611 flow [2022-11-18 18:34:59,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1161 places, 1084 transitions, 2597 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:34:59,449 INFO L231 Difference]: Finished difference. Result has 1166 places, 1073 transitions, 2475 flow [2022-11-18 18:34:59,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=1141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2475, PETRI_PLACES=1166, PETRI_TRANSITIONS=1073} [2022-11-18 18:34:59,449 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 26 predicate places. [2022-11-18 18:34:59,449 INFO L495 AbstractCegarLoop]: Abstraction has has 1166 places, 1073 transitions, 2475 flow [2022-11-18 18:34:59,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1021.6111111111111) internal successors, (18389), 18 states have internal predecessors, (18389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:59,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:34:59,451 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:59,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-11-18 18:34:59,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-11-18 18:34:59,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:34:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1008893212, now seen corresponding path program 1 times [2022-11-18 18:34:59,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:59,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922773190] [2022-11-18 18:34:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:59,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:59,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922773190] [2022-11-18 18:34:59,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922773190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:59,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783494849] [2022-11-18 18:34:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:59,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:59,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:59,844 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:59,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-18 18:35:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:01,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:35:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:01,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:01,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783494849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:01,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:01,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:35:01,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420794927] [2022-11-18 18:35:01,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:01,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:35:01,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:35:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:35:01,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-18 18:35:01,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1166 places, 1073 transitions, 2475 flow. Second operand has 34 states, 34 states have (on average 1021.7941176470588) internal successors, (34741), 34 states have internal predecessors, (34741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:01,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:01,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-18 18:35:01,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:04,163 INFO L130 PetriNetUnfolder]: 0/1623 cut-off events. [2022-11-18 18:35:04,163 INFO L131 PetriNetUnfolder]: For 870/870 co-relation queries the response was YES. [2022-11-18 18:35:04,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 1623 events. 0/1623 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5179 event pairs, 0 based on Foata normal form. 8/1631 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-11-18 18:35:04,167 INFO L137 encePairwiseOnDemand]: 1285/1291 looper letters, 71 selfloop transitions, 45 changer transitions 0/1124 dead transitions. [2022-11-18 18:35:04,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1210 places, 1124 transitions, 3023 flow [2022-11-18 18:35:04,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:35:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:35:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45979 transitions. [2022-11-18 18:35:04,189 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.79144504690593 [2022-11-18 18:35:04,189 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 45979 transitions. [2022-11-18 18:35:04,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 45979 transitions. [2022-11-18 18:35:04,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:04,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 45979 transitions. [2022-11-18 18:35:04,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1021.7555555555556) internal successors, (45979), 45 states have internal predecessors, (45979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:04,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1291.0) internal successors, (59386), 46 states have internal predecessors, (59386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:04,253 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1291.0) internal successors, (59386), 46 states have internal predecessors, (59386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:04,253 INFO L175 Difference]: Start difference. First operand has 1166 places, 1073 transitions, 2475 flow. Second operand 45 states and 45979 transitions. [2022-11-18 18:35:04,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1210 places, 1124 transitions, 3023 flow [2022-11-18 18:35:04,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1204 places, 1124 transitions, 2983 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:35:04,269 INFO L231 Difference]: Finished difference. Result has 1213 places, 1098 transitions, 2753 flow [2022-11-18 18:35:04,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=1160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2753, PETRI_PLACES=1213, PETRI_TRANSITIONS=1098} [2022-11-18 18:35:04,270 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 73 predicate places. [2022-11-18 18:35:04,270 INFO L495 AbstractCegarLoop]: Abstraction has has 1213 places, 1098 transitions, 2753 flow [2022-11-18 18:35:04,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1021.7941176470588) internal successors, (34741), 34 states have internal predecessors, (34741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:04,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:04,274 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:04,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:04,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:04,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1990380528, now seen corresponding path program 1 times [2022-11-18 18:35:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:04,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614904104] [2022-11-18 18:35:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:04,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:05,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:05,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614904104] [2022-11-18 18:35:05,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614904104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166619473] [2022-11-18 18:35:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:05,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:05,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:05,098 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:05,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-18 18:35:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:06,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:35:06,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:06,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:07,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166619473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:07,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:07,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:35:07,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443251411] [2022-11-18 18:35:07,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:07,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:35:07,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:35:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:35:07,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-18 18:35:07,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1213 places, 1098 transitions, 2753 flow. Second operand has 66 states, 66 states have (on average 1021.8939393939394) internal successors, (67445), 66 states have internal predecessors, (67445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:07,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:07,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-18 18:35:07,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:11,604 INFO L130 PetriNetUnfolder]: 0/1447 cut-off events. [2022-11-18 18:35:11,604 INFO L131 PetriNetUnfolder]: For 2950/2950 co-relation queries the response was YES. [2022-11-18 18:35:11,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 1447 events. 0/1447 cut-off events. For 2950/2950 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4006 event pairs, 0 based on Foata normal form. 16/1463 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2022-11-18 18:35:11,607 INFO L137 encePairwiseOnDemand]: 1285/1291 looper letters, 103 selfloop transitions, 93 changer transitions 0/1204 dead transitions. [2022-11-18 18:35:11,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1305 places, 1204 transitions, 3993 flow [2022-11-18 18:35:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:35:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:35:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94979 transitions. [2022-11-18 18:35:11,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7910763515820861 [2022-11-18 18:35:11,652 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 94979 transitions. [2022-11-18 18:35:11,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 94979 transitions. [2022-11-18 18:35:11,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:11,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 94979 transitions. [2022-11-18 18:35:11,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1021.2795698924731) internal successors, (94979), 93 states have internal predecessors, (94979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:11,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1291.0) internal successors, (121354), 94 states have internal predecessors, (121354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:11,783 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1291.0) internal successors, (121354), 94 states have internal predecessors, (121354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:11,783 INFO L175 Difference]: Start difference. First operand has 1213 places, 1098 transitions, 2753 flow. Second operand 93 states and 94979 transitions. [2022-11-18 18:35:11,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1305 places, 1204 transitions, 3993 flow [2022-11-18 18:35:11,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1287 places, 1204 transitions, 3905 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:35:11,809 INFO L231 Difference]: Finished difference. Result has 1304 places, 1147 transitions, 3387 flow [2022-11-18 18:35:11,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=1195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3387, PETRI_PLACES=1304, PETRI_TRANSITIONS=1147} [2022-11-18 18:35:11,810 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 164 predicate places. [2022-11-18 18:35:11,810 INFO L495 AbstractCegarLoop]: Abstraction has has 1304 places, 1147 transitions, 3387 flow [2022-11-18 18:35:11,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1021.8939393939394) internal successors, (67445), 66 states have internal predecessors, (67445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:11,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:11,818 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:11,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-18 18:35:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-11-18 18:35:12,018 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash -427441480, now seen corresponding path program 1 times [2022-11-18 18:35:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485484873] [2022-11-18 18:35:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:14,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485484873] [2022-11-18 18:35:14,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485484873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843731195] [2022-11-18 18:35:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:14,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:14,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:14,458 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:14,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-18 18:35:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:16,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:35:16,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:16,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:20,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843731195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:20,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:20,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:35:20,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063831332] [2022-11-18 18:35:20,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:20,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:35:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:35:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:35:20,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-18 18:35:20,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1304 places, 1147 transitions, 3387 flow. Second operand has 130 states, 130 states have (on average 1021.9461538461538) internal successors, (132853), 130 states have internal predecessors, (132853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:20,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:20,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-18 18:35:20,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:25,148 INFO L130 PetriNetUnfolder]: 0/1370 cut-off events. [2022-11-18 18:35:25,148 INFO L131 PetriNetUnfolder]: For 4177/4177 co-relation queries the response was YES. [2022-11-18 18:35:25,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 1370 events. 0/1370 cut-off events. For 4177/4177 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3521 event pairs, 0 based on Foata normal form. 7/1377 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2022-11-18 18:35:25,150 INFO L137 encePairwiseOnDemand]: 1286/1291 looper letters, 114 selfloop transitions, 112 changer transitions 0/1224 dead transitions. [2022-11-18 18:35:25,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1406 places, 1224 transitions, 4497 flow [2022-11-18 18:35:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-18 18:35:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2022-11-18 18:35:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116399 transitions. [2022-11-18 18:35:25,195 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7908937719977713 [2022-11-18 18:35:25,196 INFO L72 ComplementDD]: Start complementDD. Operand 114 states and 116399 transitions. [2022-11-18 18:35:25,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 116399 transitions. [2022-11-18 18:35:25,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:25,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 114 states and 116399 transitions. [2022-11-18 18:35:25,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 115 states, 114 states have (on average 1021.0438596491229) internal successors, (116399), 114 states have internal predecessors, (116399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:25,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 115 states, 115 states have (on average 1291.0) internal successors, (148465), 115 states have internal predecessors, (148465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:25,360 INFO L81 ComplementDD]: Finished complementDD. Result has 115 states, 115 states have (on average 1291.0) internal successors, (148465), 115 states have internal predecessors, (148465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:25,361 INFO L175 Difference]: Start difference. First operand has 1304 places, 1147 transitions, 3387 flow. Second operand 114 states and 116399 transitions. [2022-11-18 18:35:25,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1406 places, 1224 transitions, 4497 flow [2022-11-18 18:35:25,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1333 places, 1224 transitions, 4115 flow, removed 24 selfloop flow, removed 73 redundant places. [2022-11-18 18:35:25,383 INFO L231 Difference]: Finished difference. Result has 1333 places, 1154 transitions, 3435 flow [2022-11-18 18:35:25,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=1220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1042, PETRI_DIFFERENCE_SUBTRAHEND_STATES=114, PETRI_FLOW=3435, PETRI_PLACES=1333, PETRI_TRANSITIONS=1154} [2022-11-18 18:35:25,384 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 193 predicate places. [2022-11-18 18:35:25,384 INFO L495 AbstractCegarLoop]: Abstraction has has 1333 places, 1154 transitions, 3435 flow [2022-11-18 18:35:25,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1021.9461538461538) internal successors, (132853), 130 states have internal predecessors, (132853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:25,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:25,395 INFO L209 CegarLoopForPetriNet]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:25,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:25,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-11-18 18:35:25,595 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1952240079, now seen corresponding path program 1 times [2022-11-18 18:35:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:25,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067589871] [2022-11-18 18:35:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:25,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:35:25,664 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:35:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:35:25,831 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:35:25,831 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:35:25,831 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:35:25,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:35:25,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2022-11-18 18:35:25,832 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:25,832 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:35:25,832 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2022-11-18 18:35:25,939 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:35:25,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1169 places, 1324 transitions, 4244 flow [2022-11-18 18:35:28,385 INFO L130 PetriNetUnfolder]: 384/2687 cut-off events. [2022-11-18 18:35:28,385 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2022-11-18 18:35:28,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3543 conditions, 2687 events. 384/2687 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9854 event pairs, 0 based on Foata normal form. 0/2225 useless extension candidates. Maximal degree in co-relation 3405. Up to 78 conditions per place. [2022-11-18 18:35:28,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 1169 places, 1324 transitions, 4244 flow [2022-11-18 18:35:28,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1169 places, 1324 transitions, 4244 flow [2022-11-18 18:35:28,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:35:28,675 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:35:28,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:35:28,679 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:35:28,679 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:35:28,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:28,679 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:28,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1195056218, now seen corresponding path program 1 times [2022-11-18 18:35:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87610329] [2022-11-18 18:35:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:28,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:28,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87610329] [2022-11-18 18:35:28,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87610329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:28,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:35:28,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:35:28,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488597573] [2022-11-18 18:35:28,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:28,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:35:28,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:28,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:35:28,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:35:28,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1053 out of 1324 [2022-11-18 18:35:28,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1169 places, 1324 transitions, 4244 flow. Second operand has 2 states, 2 states have (on average 1053.5) internal successors, (2107), 2 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:28,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:28,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1053 of 1324 [2022-11-18 18:35:28,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:30,699 INFO L130 PetriNetUnfolder]: 0/2264 cut-off events. [2022-11-18 18:35:30,699 INFO L131 PetriNetUnfolder]: For 10583/10583 co-relation queries the response was YES. [2022-11-18 18:35:30,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3159 conditions, 2264 events. 0/2264 cut-off events. For 10583/10583 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9443 event pairs, 0 based on Foata normal form. 4382/6568 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-18 18:35:30,704 INFO L137 encePairwiseOnDemand]: 1092/1324 looper letters, 38 selfloop transitions, 0 changer transitions 11/1091 dead transitions. [2022-11-18 18:35:30,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1169 places, 1091 transitions, 3854 flow [2022-11-18 18:35:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:35:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:35:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2376 transitions. [2022-11-18 18:35:30,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8972809667673716 [2022-11-18 18:35:30,706 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2376 transitions. [2022-11-18 18:35:30,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2376 transitions. [2022-11-18 18:35:30,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:30,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2376 transitions. [2022-11-18 18:35:30,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1188.0) internal successors, (2376), 2 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:30,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1324.0) internal successors, (3972), 3 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:30,710 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1324.0) internal successors, (3972), 3 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:30,710 INFO L175 Difference]: Start difference. First operand has 1169 places, 1324 transitions, 4244 flow. Second operand 2 states and 2376 transitions. [2022-11-18 18:35:30,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1169 places, 1091 transitions, 3854 flow [2022-11-18 18:35:30,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1169 places, 1091 transitions, 2448 flow, removed 703 selfloop flow, removed 0 redundant places. [2022-11-18 18:35:30,738 INFO L231 Difference]: Finished difference. Result has 1169 places, 1080 transitions, 2350 flow [2022-11-18 18:35:30,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=1168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2350, PETRI_PLACES=1169, PETRI_TRANSITIONS=1080} [2022-11-18 18:35:30,738 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 0 predicate places. [2022-11-18 18:35:30,739 INFO L495 AbstractCegarLoop]: Abstraction has has 1169 places, 1080 transitions, 2350 flow [2022-11-18 18:35:30,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1053.5) internal successors, (2107), 2 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:30,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:30,739 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2022-11-18 18:35:30,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash -601895141, now seen corresponding path program 1 times [2022-11-18 18:35:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:30,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476369345] [2022-11-18 18:35:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:30,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:30,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:30,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476369345] [2022-11-18 18:35:30,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476369345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:30,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:35:30,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:35:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078257125] [2022-11-18 18:35:30,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:30,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:35:30,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:35:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:35:30,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1046 out of 1324 [2022-11-18 18:35:30,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1169 places, 1080 transitions, 2350 flow. Second operand has 3 states, 3 states have (on average 1047.0) internal successors, (3141), 3 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:30,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:30,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1046 of 1324 [2022-11-18 18:35:30,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:32,648 INFO L130 PetriNetUnfolder]: 0/1824 cut-off events. [2022-11-18 18:35:32,648 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-18 18:35:32,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2211 conditions, 1824 events. 0/1824 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6321 event pairs, 0 based on Foata normal form. 0/1786 useless extension candidates. Maximal degree in co-relation 0. Up to 228 conditions per place. [2022-11-18 18:35:32,653 INFO L137 encePairwiseOnDemand]: 1321/1324 looper letters, 47 selfloop transitions, 2 changer transitions 0/1084 dead transitions. [2022-11-18 18:35:32,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1160 places, 1084 transitions, 2456 flow [2022-11-18 18:35:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:35:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:35:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3188 transitions. [2022-11-18 18:35:32,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8026183282980867 [2022-11-18 18:35:32,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3188 transitions. [2022-11-18 18:35:32,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3188 transitions. [2022-11-18 18:35:32,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:32,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3188 transitions. [2022-11-18 18:35:32,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1062.6666666666667) internal successors, (3188), 3 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:32,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1324.0) internal successors, (5296), 4 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:32,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1324.0) internal successors, (5296), 4 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:32,661 INFO L175 Difference]: Start difference. First operand has 1169 places, 1080 transitions, 2350 flow. Second operand 3 states and 3188 transitions. [2022-11-18 18:35:32,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1160 places, 1084 transitions, 2456 flow [2022-11-18 18:35:32,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1160 places, 1084 transitions, 2456 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:35:32,672 INFO L231 Difference]: Finished difference. Result has 1161 places, 1081 transitions, 2362 flow [2022-11-18 18:35:32,673 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=1158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2362, PETRI_PLACES=1161, PETRI_TRANSITIONS=1081} [2022-11-18 18:35:32,673 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, -8 predicate places. [2022-11-18 18:35:32,673 INFO L495 AbstractCegarLoop]: Abstraction has has 1161 places, 1081 transitions, 2362 flow [2022-11-18 18:35:32,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1047.0) internal successors, (3141), 3 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:32,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:32,674 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:32,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2022-11-18 18:35:32,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash 645854383, now seen corresponding path program 1 times [2022-11-18 18:35:32,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:32,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577489105] [2022-11-18 18:35:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577489105] [2022-11-18 18:35:32,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577489105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572759318] [2022-11-18 18:35:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:32,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:32,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:32,731 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:32,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-18 18:35:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:34,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:35:34,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:34,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:34,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572759318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:34,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:34,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:35:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319864461] [2022-11-18 18:35:34,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:35:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:35:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:35:34,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-18 18:35:34,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1161 places, 1081 transitions, 2362 flow. Second operand has 10 states, 10 states have (on average 1047.3) internal successors, (10473), 10 states have internal predecessors, (10473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:34,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:34,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-18 18:35:34,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:36,252 INFO L130 PetriNetUnfolder]: 0/1802 cut-off events. [2022-11-18 18:35:36,252 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-18 18:35:36,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2303 conditions, 1802 events. 0/1802 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6191 event pairs, 0 based on Foata normal form. 2/1804 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2022-11-18 18:35:36,256 INFO L137 encePairwiseOnDemand]: 1318/1324 looper letters, 48 selfloop transitions, 9 changer transitions 0/1091 dead transitions. [2022-11-18 18:35:36,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1169 places, 1091 transitions, 2498 flow [2022-11-18 18:35:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:35:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:35:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9464 transitions. [2022-11-18 18:35:36,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7942262504196039 [2022-11-18 18:35:36,263 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9464 transitions. [2022-11-18 18:35:36,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9464 transitions. [2022-11-18 18:35:36,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:36,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9464 transitions. [2022-11-18 18:35:36,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1051.5555555555557) internal successors, (9464), 9 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:36,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1324.0) internal successors, (13240), 10 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:36,277 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1324.0) internal successors, (13240), 10 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:36,277 INFO L175 Difference]: Start difference. First operand has 1161 places, 1081 transitions, 2362 flow. Second operand 9 states and 9464 transitions. [2022-11-18 18:35:36,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1169 places, 1091 transitions, 2498 flow [2022-11-18 18:35:36,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1168 places, 1091 transitions, 2496 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:35:36,289 INFO L231 Difference]: Finished difference. Result has 1171 places, 1087 transitions, 2410 flow [2022-11-18 18:35:36,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=1160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1075, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2410, PETRI_PLACES=1171, PETRI_TRANSITIONS=1087} [2022-11-18 18:35:36,290 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 2 predicate places. [2022-11-18 18:35:36,290 INFO L495 AbstractCegarLoop]: Abstraction has has 1171 places, 1087 transitions, 2410 flow [2022-11-18 18:35:36,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1047.3) internal successors, (10473), 10 states have internal predecessors, (10473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:36,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:36,292 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:36,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:36,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:36,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash 194548122, now seen corresponding path program 1 times [2022-11-18 18:35:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:36,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251756130] [2022-11-18 18:35:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:36,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251756130] [2022-11-18 18:35:36,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251756130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402981003] [2022-11-18 18:35:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:36,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:36,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:36,575 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:36,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-18 18:35:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:35:38,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:38,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:38,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402981003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:38,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:38,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:35:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330778288] [2022-11-18 18:35:38,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:38,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:35:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:35:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:35:38,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-18 18:35:38,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1171 places, 1087 transitions, 2410 flow. Second operand has 18 states, 18 states have (on average 1047.611111111111) internal successors, (18857), 18 states have internal predecessors, (18857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:38,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:38,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-18 18:35:38,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:40,560 INFO L130 PetriNetUnfolder]: 0/1758 cut-off events. [2022-11-18 18:35:40,560 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-18 18:35:40,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2544 conditions, 1758 events. 0/1758 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5904 event pairs, 0 based on Foata normal form. 4/1762 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-11-18 18:35:40,564 INFO L137 encePairwiseOnDemand]: 1318/1324 looper letters, 56 selfloop transitions, 21 changer transitions 0/1111 dead transitions. [2022-11-18 18:35:40,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1191 places, 1111 transitions, 2672 flow [2022-11-18 18:35:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:35:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:35:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22026 transitions. [2022-11-18 18:35:40,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7921881743634009 [2022-11-18 18:35:40,575 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 22026 transitions. [2022-11-18 18:35:40,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 22026 transitions. [2022-11-18 18:35:40,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:40,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 22026 transitions. [2022-11-18 18:35:40,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1048.857142857143) internal successors, (22026), 21 states have internal predecessors, (22026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:40,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1324.0) internal successors, (29128), 22 states have internal predecessors, (29128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:40,808 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1324.0) internal successors, (29128), 22 states have internal predecessors, (29128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:40,808 INFO L175 Difference]: Start difference. First operand has 1171 places, 1087 transitions, 2410 flow. Second operand 21 states and 22026 transitions. [2022-11-18 18:35:40,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1191 places, 1111 transitions, 2672 flow [2022-11-18 18:35:40,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1190 places, 1111 transitions, 2658 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:35:40,819 INFO L231 Difference]: Finished difference. Result has 1195 places, 1100 transitions, 2534 flow [2022-11-18 18:35:40,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=1170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2534, PETRI_PLACES=1195, PETRI_TRANSITIONS=1100} [2022-11-18 18:35:40,820 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 26 predicate places. [2022-11-18 18:35:40,820 INFO L495 AbstractCegarLoop]: Abstraction has has 1195 places, 1100 transitions, 2534 flow [2022-11-18 18:35:40,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1047.611111111111) internal successors, (18857), 18 states have internal predecessors, (18857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:40,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:40,822 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:40,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-11-18 18:35:41,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:41,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:41,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:41,023 INFO L85 PathProgramCache]: Analyzing trace with hash 867848060, now seen corresponding path program 1 times [2022-11-18 18:35:41,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:41,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663124043] [2022-11-18 18:35:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:41,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663124043] [2022-11-18 18:35:41,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663124043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:41,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418068692] [2022-11-18 18:35:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:41,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:41,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:41,218 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:41,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-18 18:35:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:42,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:35:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:42,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:43,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418068692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:43,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:43,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:35:43,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723724654] [2022-11-18 18:35:43,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:43,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:35:43,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:35:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:35:43,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-18 18:35:43,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1195 places, 1100 transitions, 2534 flow. Second operand has 34 states, 34 states have (on average 1047.7941176470588) internal successors, (35625), 34 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:43,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:43,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-18 18:35:43,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:46,097 INFO L130 PetriNetUnfolder]: 0/1670 cut-off events. [2022-11-18 18:35:46,097 INFO L131 PetriNetUnfolder]: For 897/897 co-relation queries the response was YES. [2022-11-18 18:35:46,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 1670 events. 0/1670 cut-off events. For 897/897 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5328 event pairs, 0 based on Foata normal form. 8/1678 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-11-18 18:35:46,102 INFO L137 encePairwiseOnDemand]: 1318/1324 looper letters, 72 selfloop transitions, 45 changer transitions 0/1151 dead transitions. [2022-11-18 18:35:46,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1239 places, 1151 transitions, 3084 flow [2022-11-18 18:35:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:35:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:35:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47150 transitions. [2022-11-18 18:35:46,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913729439409197 [2022-11-18 18:35:46,127 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 47150 transitions. [2022-11-18 18:35:46,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 47150 transitions. [2022-11-18 18:35:46,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:46,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 47150 transitions. [2022-11-18 18:35:46,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1047.7777777777778) internal successors, (47150), 45 states have internal predecessors, (47150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:46,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1324.0) internal successors, (60904), 46 states have internal predecessors, (60904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:46,196 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1324.0) internal successors, (60904), 46 states have internal predecessors, (60904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:46,196 INFO L175 Difference]: Start difference. First operand has 1195 places, 1100 transitions, 2534 flow. Second operand 45 states and 47150 transitions. [2022-11-18 18:35:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1239 places, 1151 transitions, 3084 flow [2022-11-18 18:35:46,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1233 places, 1151 transitions, 3044 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:35:46,214 INFO L231 Difference]: Finished difference. Result has 1242 places, 1125 transitions, 2812 flow [2022-11-18 18:35:46,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=1189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2812, PETRI_PLACES=1242, PETRI_TRANSITIONS=1125} [2022-11-18 18:35:46,214 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 73 predicate places. [2022-11-18 18:35:46,214 INFO L495 AbstractCegarLoop]: Abstraction has has 1242 places, 1125 transitions, 2812 flow [2022-11-18 18:35:46,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1047.7941176470588) internal successors, (35625), 34 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:46,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:46,219 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:46,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-11-18 18:35:46,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-11-18 18:35:46,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1521335440, now seen corresponding path program 1 times [2022-11-18 18:35:46,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:46,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605103260] [2022-11-18 18:35:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:46,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:47,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:47,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605103260] [2022-11-18 18:35:47,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605103260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049372006] [2022-11-18 18:35:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:47,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:47,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:47,097 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:47,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-18 18:35:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:35:48,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:48,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:49,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049372006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:49,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:49,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:35:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950355057] [2022-11-18 18:35:49,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:49,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:35:49,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:35:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:35:49,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-18 18:35:50,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1242 places, 1125 transitions, 2812 flow. Second operand has 66 states, 66 states have (on average 1047.8939393939395) internal successors, (69161), 66 states have internal predecessors, (69161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:50,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:35:50,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-18 18:35:50,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:35:53,928 INFO L130 PetriNetUnfolder]: 0/1494 cut-off events. [2022-11-18 18:35:53,928 INFO L131 PetriNetUnfolder]: For 3071/3071 co-relation queries the response was YES. [2022-11-18 18:35:53,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1494 events. 0/1494 cut-off events. For 3071/3071 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4176 event pairs, 0 based on Foata normal form. 16/1510 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-18 18:35:53,931 INFO L137 encePairwiseOnDemand]: 1318/1324 looper letters, 104 selfloop transitions, 93 changer transitions 0/1231 dead transitions. [2022-11-18 18:35:53,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1334 places, 1231 transitions, 4054 flow [2022-11-18 18:35:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:35:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:35:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97398 transitions. [2022-11-18 18:35:53,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791004775363025 [2022-11-18 18:35:53,972 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 97398 transitions. [2022-11-18 18:35:53,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 97398 transitions. [2022-11-18 18:35:53,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:35:53,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 97398 transitions. [2022-11-18 18:35:54,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1047.2903225806451) internal successors, (97398), 93 states have internal predecessors, (97398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:54,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1324.0) internal successors, (124456), 94 states have internal predecessors, (124456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:54,115 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1324.0) internal successors, (124456), 94 states have internal predecessors, (124456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:54,115 INFO L175 Difference]: Start difference. First operand has 1242 places, 1125 transitions, 2812 flow. Second operand 93 states and 97398 transitions. [2022-11-18 18:35:54,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1334 places, 1231 transitions, 4054 flow [2022-11-18 18:35:54,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1316 places, 1231 transitions, 3966 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:35:54,144 INFO L231 Difference]: Finished difference. Result has 1333 places, 1174 transitions, 3446 flow [2022-11-18 18:35:54,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=1224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3446, PETRI_PLACES=1333, PETRI_TRANSITIONS=1174} [2022-11-18 18:35:54,145 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 164 predicate places. [2022-11-18 18:35:54,145 INFO L495 AbstractCegarLoop]: Abstraction has has 1333 places, 1174 transitions, 3446 flow [2022-11-18 18:35:54,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1047.8939393939395) internal successors, (69161), 66 states have internal predecessors, (69161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:54,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:35:54,151 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:54,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-11-18 18:35:54,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-11-18 18:35:54,352 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:35:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash 363809816, now seen corresponding path program 1 times [2022-11-18 18:35:54,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:54,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229767219] [2022-11-18 18:35:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:56,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229767219] [2022-11-18 18:35:56,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229767219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723645322] [2022-11-18 18:35:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:56,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:56,651 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:56,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-18 18:35:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:35:58,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:58,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:02,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723645322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:02,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:02,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:36:02,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327269450] [2022-11-18 18:36:02,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:02,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:36:02,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:02,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:36:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:36:02,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-18 18:36:02,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1333 places, 1174 transitions, 3446 flow. Second operand has 130 states, 130 states have (on average 1047.946153846154) internal successors, (136233), 130 states have internal predecessors, (136233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:02,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:02,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-18 18:36:02,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:07,767 INFO L130 PetriNetUnfolder]: 0/1406 cut-off events. [2022-11-18 18:36:07,767 INFO L131 PetriNetUnfolder]: For 4674/4674 co-relation queries the response was YES. [2022-11-18 18:36:07,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 1406 events. 0/1406 cut-off events. For 4674/4674 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3619 event pairs, 0 based on Foata normal form. 8/1414 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-18 18:36:07,770 INFO L137 encePairwiseOnDemand]: 1319/1324 looper letters, 117 selfloop transitions, 115 changer transitions 0/1256 dead transitions. [2022-11-18 18:36:07,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1438 places, 1256 transitions, 4622 flow [2022-11-18 18:36:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-18 18:36:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2022-11-18 18:36:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122505 transitions. [2022-11-18 18:36:08,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7908242311565574 [2022-11-18 18:36:08,052 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 122505 transitions. [2022-11-18 18:36:08,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 122505 transitions. [2022-11-18 18:36:08,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:08,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 122505 transitions. [2022-11-18 18:36:08,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 1047.051282051282) internal successors, (122505), 117 states have internal predecessors, (122505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:08,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 1324.0) internal successors, (156232), 118 states have internal predecessors, (156232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:08,234 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 1324.0) internal successors, (156232), 118 states have internal predecessors, (156232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:08,235 INFO L175 Difference]: Start difference. First operand has 1333 places, 1174 transitions, 3446 flow. Second operand 117 states and 122505 transitions. [2022-11-18 18:36:08,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1438 places, 1256 transitions, 4622 flow [2022-11-18 18:36:08,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1365 places, 1256 transitions, 4230 flow, removed 25 selfloop flow, removed 73 redundant places. [2022-11-18 18:36:08,260 INFO L231 Difference]: Finished difference. Result has 1365 places, 1184 transitions, 3528 flow [2022-11-18 18:36:08,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=1249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1069, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=3528, PETRI_PLACES=1365, PETRI_TRANSITIONS=1184} [2022-11-18 18:36:08,261 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 196 predicate places. [2022-11-18 18:36:08,261 INFO L495 AbstractCegarLoop]: Abstraction has has 1365 places, 1184 transitions, 3528 flow [2022-11-18 18:36:08,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1047.946153846154) internal successors, (136233), 130 states have internal predecessors, (136233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:08,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:08,273 INFO L209 CegarLoopForPetriNet]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:08,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-11-18 18:36:08,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-11-18 18:36:08,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -852815382, now seen corresponding path program 1 times [2022-11-18 18:36:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:08,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241740464] [2022-11-18 18:36:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:36:08,559 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:36:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:36:08,748 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:36:08,748 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:36:08,748 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:36:08,749 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:36:08,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2022-11-18 18:36:08,749 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:08,749 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:36:08,749 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2022-11-18 18:36:08,872 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:36:08,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1198 places, 1357 transitions, 4391 flow [2022-11-18 18:36:11,021 INFO L130 PetriNetUnfolder]: 394/2756 cut-off events. [2022-11-18 18:36:11,021 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2022-11-18 18:36:11,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 2756 events. 394/2756 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10129 event pairs, 0 based on Foata normal form. 0/2282 useless extension candidates. Maximal degree in co-relation 3515. Up to 80 conditions per place. [2022-11-18 18:36:11,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 1198 places, 1357 transitions, 4391 flow [2022-11-18 18:36:11,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1198 places, 1357 transitions, 4391 flow [2022-11-18 18:36:11,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:36:11,287 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:36:11,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:36:11,294 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:36:11,294 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:36:11,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:11,295 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:11,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:11,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1289005030, now seen corresponding path program 1 times [2022-11-18 18:36:11,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:11,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348478826] [2022-11-18 18:36:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:11,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:11,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:11,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348478826] [2022-11-18 18:36:11,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348478826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:11,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:11,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:36:11,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353999769] [2022-11-18 18:36:11,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:11,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:36:11,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:11,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:36:11,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:36:11,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1079 out of 1357 [2022-11-18 18:36:11,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1198 places, 1357 transitions, 4391 flow. Second operand has 2 states, 2 states have (on average 1079.5) internal successors, (2159), 2 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:11,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:11,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1079 of 1357 [2022-11-18 18:36:11,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:13,387 INFO L130 PetriNetUnfolder]: 0/2322 cut-off events. [2022-11-18 18:36:13,387 INFO L131 PetriNetUnfolder]: For 11401/11401 co-relation queries the response was YES. [2022-11-18 18:36:13,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 2322 events. 0/2322 cut-off events. For 11401/11401 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 9545 event pairs, 0 based on Foata normal form. 4614/6856 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-11-18 18:36:13,393 INFO L137 encePairwiseOnDemand]: 1119/1357 looper letters, 39 selfloop transitions, 0 changer transitions 11/1118 dead transitions. [2022-11-18 18:36:13,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1198 places, 1118 transitions, 3991 flow [2022-11-18 18:36:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:36:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:36:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2435 transitions. [2022-11-18 18:36:13,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8971997052321297 [2022-11-18 18:36:13,396 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2435 transitions. [2022-11-18 18:36:13,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2435 transitions. [2022-11-18 18:36:13,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:13,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2435 transitions. [2022-11-18 18:36:13,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1217.5) internal successors, (2435), 2 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1357.0) internal successors, (4071), 3 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,400 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1357.0) internal successors, (4071), 3 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,400 INFO L175 Difference]: Start difference. First operand has 1198 places, 1357 transitions, 4391 flow. Second operand 2 states and 2435 transitions. [2022-11-18 18:36:13,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1198 places, 1118 transitions, 3991 flow [2022-11-18 18:36:13,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1198 places, 1118 transitions, 2509 flow, removed 741 selfloop flow, removed 0 redundant places. [2022-11-18 18:36:13,431 INFO L231 Difference]: Finished difference. Result has 1198 places, 1107 transitions, 2409 flow [2022-11-18 18:36:13,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=1197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2409, PETRI_PLACES=1198, PETRI_TRANSITIONS=1107} [2022-11-18 18:36:13,432 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 0 predicate places. [2022-11-18 18:36:13,432 INFO L495 AbstractCegarLoop]: Abstraction has has 1198 places, 1107 transitions, 2409 flow [2022-11-18 18:36:13,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1079.5) internal successors, (2159), 2 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:13,432 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:13,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2022-11-18 18:36:13,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1209010907, now seen corresponding path program 1 times [2022-11-18 18:36:13,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:13,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998087609] [2022-11-18 18:36:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:13,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:13,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998087609] [2022-11-18 18:36:13,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998087609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:13,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:13,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:36:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147684187] [2022-11-18 18:36:13,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:13,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:36:13,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:36:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:36:13,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1072 out of 1357 [2022-11-18 18:36:13,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1198 places, 1107 transitions, 2409 flow. Second operand has 3 states, 3 states have (on average 1073.0) internal successors, (3219), 3 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:13,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1072 of 1357 [2022-11-18 18:36:13,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:15,080 INFO L130 PetriNetUnfolder]: 0/1871 cut-off events. [2022-11-18 18:36:15,080 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-18 18:36:15,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2268 conditions, 1871 events. 0/1871 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6526 event pairs, 0 based on Foata normal form. 0/1832 useless extension candidates. Maximal degree in co-relation 0. Up to 234 conditions per place. [2022-11-18 18:36:15,086 INFO L137 encePairwiseOnDemand]: 1354/1357 looper letters, 48 selfloop transitions, 2 changer transitions 0/1111 dead transitions. [2022-11-18 18:36:15,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1189 places, 1111 transitions, 2517 flow [2022-11-18 18:36:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:36:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:36:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3267 transitions. [2022-11-18 18:36:15,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025055268975682 [2022-11-18 18:36:15,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3267 transitions. [2022-11-18 18:36:15,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3267 transitions. [2022-11-18 18:36:15,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:15,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3267 transitions. [2022-11-18 18:36:15,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1089.0) internal successors, (3267), 3 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:15,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1357.0) internal successors, (5428), 4 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:15,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1357.0) internal successors, (5428), 4 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:15,094 INFO L175 Difference]: Start difference. First operand has 1198 places, 1107 transitions, 2409 flow. Second operand 3 states and 3267 transitions. [2022-11-18 18:36:15,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1189 places, 1111 transitions, 2517 flow [2022-11-18 18:36:15,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1189 places, 1111 transitions, 2517 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:36:15,104 INFO L231 Difference]: Finished difference. Result has 1190 places, 1108 transitions, 2421 flow [2022-11-18 18:36:15,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=1187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2421, PETRI_PLACES=1190, PETRI_TRANSITIONS=1108} [2022-11-18 18:36:15,105 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, -8 predicate places. [2022-11-18 18:36:15,105 INFO L495 AbstractCegarLoop]: Abstraction has has 1190 places, 1108 transitions, 2421 flow [2022-11-18 18:36:15,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1073.0) internal successors, (3219), 3 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:15,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:15,106 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:15,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2022-11-18 18:36:15,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash 440631471, now seen corresponding path program 1 times [2022-11-18 18:36:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:15,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289948871] [2022-11-18 18:36:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:15,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:15,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:15,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289948871] [2022-11-18 18:36:15,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289948871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:15,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039940063] [2022-11-18 18:36:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:15,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:15,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:15,160 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:15,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-11-18 18:36:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:36:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:16,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:16,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039940063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:16,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:16,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:36:16,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855770096] [2022-11-18 18:36:16,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:16,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:36:16,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:36:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:36:16,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-18 18:36:16,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1190 places, 1108 transitions, 2421 flow. Second operand has 10 states, 10 states have (on average 1073.3) internal successors, (10733), 10 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:16,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:16,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-18 18:36:16,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:18,701 INFO L130 PetriNetUnfolder]: 0/1849 cut-off events. [2022-11-18 18:36:18,701 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-18 18:36:18,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 1849 events. 0/1849 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6362 event pairs, 0 based on Foata normal form. 2/1851 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2022-11-18 18:36:18,706 INFO L137 encePairwiseOnDemand]: 1351/1357 looper letters, 49 selfloop transitions, 9 changer transitions 0/1118 dead transitions. [2022-11-18 18:36:18,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1198 places, 1118 transitions, 2559 flow [2022-11-18 18:36:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:36:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:36:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9699 transitions. [2022-11-18 18:36:18,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7941537705723409 [2022-11-18 18:36:18,895 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9699 transitions. [2022-11-18 18:36:18,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9699 transitions. [2022-11-18 18:36:18,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:18,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9699 transitions. [2022-11-18 18:36:18,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1077.6666666666667) internal successors, (9699), 9 states have internal predecessors, (9699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:18,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1357.0) internal successors, (13570), 10 states have internal predecessors, (13570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:18,908 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1357.0) internal successors, (13570), 10 states have internal predecessors, (13570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:18,909 INFO L175 Difference]: Start difference. First operand has 1190 places, 1108 transitions, 2421 flow. Second operand 9 states and 9699 transitions. [2022-11-18 18:36:18,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1198 places, 1118 transitions, 2559 flow [2022-11-18 18:36:18,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1197 places, 1118 transitions, 2557 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:36:18,920 INFO L231 Difference]: Finished difference. Result has 1200 places, 1114 transitions, 2469 flow [2022-11-18 18:36:18,920 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=1189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2469, PETRI_PLACES=1200, PETRI_TRANSITIONS=1114} [2022-11-18 18:36:18,920 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 2 predicate places. [2022-11-18 18:36:18,920 INFO L495 AbstractCegarLoop]: Abstraction has has 1200 places, 1114 transitions, 2469 flow [2022-11-18 18:36:18,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1073.3) internal successors, (10733), 10 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:18,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:18,922 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:18,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:19,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:19,122 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash -939274726, now seen corresponding path program 1 times [2022-11-18 18:36:19,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:19,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004966392] [2022-11-18 18:36:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:19,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004966392] [2022-11-18 18:36:19,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004966392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:19,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216246549] [2022-11-18 18:36:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:19,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:19,204 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:19,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-11-18 18:36:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:20,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:36:20,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:20,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:20,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216246549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:20,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:20,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:36:20,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527761337] [2022-11-18 18:36:20,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:20,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:36:20,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:36:20,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:36:20,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-18 18:36:20,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1200 places, 1114 transitions, 2469 flow. Second operand has 18 states, 18 states have (on average 1073.611111111111) internal successors, (19325), 18 states have internal predecessors, (19325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:20,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:20,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-18 18:36:20,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:23,349 INFO L130 PetriNetUnfolder]: 0/1805 cut-off events. [2022-11-18 18:36:23,350 INFO L131 PetriNetUnfolder]: For 228/228 co-relation queries the response was YES. [2022-11-18 18:36:23,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 1805 events. 0/1805 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6074 event pairs, 0 based on Foata normal form. 4/1809 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-11-18 18:36:23,353 INFO L137 encePairwiseOnDemand]: 1351/1357 looper letters, 57 selfloop transitions, 21 changer transitions 0/1138 dead transitions. [2022-11-18 18:36:23,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1220 places, 1138 transitions, 2733 flow [2022-11-18 18:36:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:36:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:36:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22573 transitions. [2022-11-18 18:36:23,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.792118468610731 [2022-11-18 18:36:23,363 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 22573 transitions. [2022-11-18 18:36:23,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 22573 transitions. [2022-11-18 18:36:23,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:23,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 22573 transitions. [2022-11-18 18:36:23,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1074.904761904762) internal successors, (22573), 21 states have internal predecessors, (22573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:23,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1357.0) internal successors, (29854), 22 states have internal predecessors, (29854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:23,397 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1357.0) internal successors, (29854), 22 states have internal predecessors, (29854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:23,397 INFO L175 Difference]: Start difference. First operand has 1200 places, 1114 transitions, 2469 flow. Second operand 21 states and 22573 transitions. [2022-11-18 18:36:23,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1220 places, 1138 transitions, 2733 flow [2022-11-18 18:36:23,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1219 places, 1138 transitions, 2719 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:36:23,409 INFO L231 Difference]: Finished difference. Result has 1224 places, 1127 transitions, 2593 flow [2022-11-18 18:36:23,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=1199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2593, PETRI_PLACES=1224, PETRI_TRANSITIONS=1127} [2022-11-18 18:36:23,410 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 26 predicate places. [2022-11-18 18:36:23,410 INFO L495 AbstractCegarLoop]: Abstraction has has 1224 places, 1127 transitions, 2593 flow [2022-11-18 18:36:23,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1073.611111111111) internal successors, (19325), 18 states have internal predecessors, (19325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:23,412 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:23,412 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:23,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-11-18 18:36:23,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:23,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2002463996, now seen corresponding path program 1 times [2022-11-18 18:36:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:23,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235087849] [2022-11-18 18:36:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:23,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:23,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:23,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235087849] [2022-11-18 18:36:23,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235087849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:23,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882903792] [2022-11-18 18:36:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:23,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:23,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:23,808 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-11-18 18:36:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:36:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:25,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:25,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882903792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:25,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:25,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:36:25,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725439312] [2022-11-18 18:36:25,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:36:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:36:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:36:25,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-18 18:36:25,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1224 places, 1127 transitions, 2593 flow. Second operand has 34 states, 34 states have (on average 1073.7941176470588) internal successors, (36509), 34 states have internal predecessors, (36509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:25,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:25,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-18 18:36:25,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:28,694 INFO L130 PetriNetUnfolder]: 0/1717 cut-off events. [2022-11-18 18:36:28,694 INFO L131 PetriNetUnfolder]: For 924/924 co-relation queries the response was YES. [2022-11-18 18:36:28,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 1717 events. 0/1717 cut-off events. For 924/924 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5521 event pairs, 0 based on Foata normal form. 8/1725 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-11-18 18:36:28,697 INFO L137 encePairwiseOnDemand]: 1351/1357 looper letters, 73 selfloop transitions, 45 changer transitions 0/1178 dead transitions. [2022-11-18 18:36:28,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1268 places, 1178 transitions, 3145 flow [2022-11-18 18:36:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:36:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:36:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48321 transitions. [2022-11-18 18:36:28,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913043478260869 [2022-11-18 18:36:28,720 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 48321 transitions. [2022-11-18 18:36:28,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 48321 transitions. [2022-11-18 18:36:28,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:28,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 48321 transitions. [2022-11-18 18:36:28,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1073.8) internal successors, (48321), 45 states have internal predecessors, (48321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:28,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1357.0) internal successors, (62422), 46 states have internal predecessors, (62422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:28,794 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1357.0) internal successors, (62422), 46 states have internal predecessors, (62422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:28,794 INFO L175 Difference]: Start difference. First operand has 1224 places, 1127 transitions, 2593 flow. Second operand 45 states and 48321 transitions. [2022-11-18 18:36:28,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1268 places, 1178 transitions, 3145 flow [2022-11-18 18:36:28,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1262 places, 1178 transitions, 3105 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:36:28,811 INFO L231 Difference]: Finished difference. Result has 1271 places, 1152 transitions, 2871 flow [2022-11-18 18:36:28,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=1218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2871, PETRI_PLACES=1271, PETRI_TRANSITIONS=1152} [2022-11-18 18:36:28,812 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 73 predicate places. [2022-11-18 18:36:28,812 INFO L495 AbstractCegarLoop]: Abstraction has has 1271 places, 1152 transitions, 2871 flow [2022-11-18 18:36:28,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1073.7941176470588) internal successors, (36509), 34 states have internal predecessors, (36509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:28,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:28,815 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:28,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-11-18 18:36:29,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:29,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1233165584, now seen corresponding path program 1 times [2022-11-18 18:36:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:29,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686109985] [2022-11-18 18:36:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:29,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686109985] [2022-11-18 18:36:29,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686109985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744039940] [2022-11-18 18:36:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:29,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:29,692 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:29,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-11-18 18:36:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:36:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:31,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:32,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744039940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:32,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:32,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:36:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375690944] [2022-11-18 18:36:32,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:32,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:36:32,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:36:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:36:32,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-18 18:36:32,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1271 places, 1152 transitions, 2871 flow. Second operand has 66 states, 66 states have (on average 1073.8939393939395) internal successors, (70877), 66 states have internal predecessors, (70877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:32,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:32,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-18 18:36:32,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:36,598 INFO L130 PetriNetUnfolder]: 0/1541 cut-off events. [2022-11-18 18:36:36,598 INFO L131 PetriNetUnfolder]: For 3192/3192 co-relation queries the response was YES. [2022-11-18 18:36:36,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2725 conditions, 1541 events. 0/1541 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4355 event pairs, 0 based on Foata normal form. 16/1557 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2022-11-18 18:36:36,601 INFO L137 encePairwiseOnDemand]: 1351/1357 looper letters, 105 selfloop transitions, 93 changer transitions 0/1258 dead transitions. [2022-11-18 18:36:36,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1363 places, 1258 transitions, 4115 flow [2022-11-18 18:36:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:36:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:36:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99817 transitions. [2022-11-18 18:36:36,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7909366803749575 [2022-11-18 18:36:36,643 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 99817 transitions. [2022-11-18 18:36:36,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 99817 transitions. [2022-11-18 18:36:36,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:36,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 99817 transitions. [2022-11-18 18:36:36,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1073.3010752688172) internal successors, (99817), 93 states have internal predecessors, (99817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:36,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1357.0) internal successors, (127558), 94 states have internal predecessors, (127558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:36,791 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1357.0) internal successors, (127558), 94 states have internal predecessors, (127558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:36,791 INFO L175 Difference]: Start difference. First operand has 1271 places, 1152 transitions, 2871 flow. Second operand 93 states and 99817 transitions. [2022-11-18 18:36:36,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1363 places, 1258 transitions, 4115 flow [2022-11-18 18:36:36,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1345 places, 1258 transitions, 4027 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:36:36,827 INFO L231 Difference]: Finished difference. Result has 1362 places, 1201 transitions, 3505 flow [2022-11-18 18:36:36,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=1253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3505, PETRI_PLACES=1362, PETRI_TRANSITIONS=1201} [2022-11-18 18:36:36,829 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 164 predicate places. [2022-11-18 18:36:36,829 INFO L495 AbstractCegarLoop]: Abstraction has has 1362 places, 1201 transitions, 3505 flow [2022-11-18 18:36:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1073.8939393939395) internal successors, (70877), 66 states have internal predecessors, (70877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:36,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:36,837 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:36,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:37,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:37,051 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2054746008, now seen corresponding path program 1 times [2022-11-18 18:36:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:37,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934049362] [2022-11-18 18:36:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:37,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:39,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934049362] [2022-11-18 18:36:39,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934049362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993853231] [2022-11-18 18:36:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:39,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:39,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:39,366 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:39,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-18 18:36:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:36:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:41,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:45,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993853231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:45,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:45,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:36:45,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582986538] [2022-11-18 18:36:45,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:45,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:36:45,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:45,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:36:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:36:45,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-18 18:36:45,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1362 places, 1201 transitions, 3505 flow. Second operand has 130 states, 130 states have (on average 1073.946153846154) internal successors, (139613), 130 states have internal predecessors, (139613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:45,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:45,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-18 18:36:45,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:50,869 INFO L130 PetriNetUnfolder]: 0/1442 cut-off events. [2022-11-18 18:36:50,869 INFO L131 PetriNetUnfolder]: For 5171/5171 co-relation queries the response was YES. [2022-11-18 18:36:50,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 1442 events. 0/1442 cut-off events. For 5171/5171 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3717 event pairs, 0 based on Foata normal form. 9/1451 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2022-11-18 18:36:50,872 INFO L137 encePairwiseOnDemand]: 1352/1357 looper letters, 120 selfloop transitions, 118 changer transitions 0/1288 dead transitions. [2022-11-18 18:36:50,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1470 places, 1288 transitions, 4747 flow [2022-11-18 18:36:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-18 18:36:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2022-11-18 18:36:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128767 transitions. [2022-11-18 18:36:51,217 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7907577990665684 [2022-11-18 18:36:51,217 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 128767 transitions. [2022-11-18 18:36:51,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 128767 transitions. [2022-11-18 18:36:51,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:51,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 128767 transitions. [2022-11-18 18:36:51,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 1073.0583333333334) internal successors, (128767), 120 states have internal predecessors, (128767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:51,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 1357.0) internal successors, (164197), 121 states have internal predecessors, (164197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:51,416 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 1357.0) internal successors, (164197), 121 states have internal predecessors, (164197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:51,416 INFO L175 Difference]: Start difference. First operand has 1362 places, 1201 transitions, 3505 flow. Second operand 120 states and 128767 transitions. [2022-11-18 18:36:51,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1470 places, 1288 transitions, 4747 flow [2022-11-18 18:36:51,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1397 places, 1288 transitions, 4345 flow, removed 26 selfloop flow, removed 73 redundant places. [2022-11-18 18:36:51,441 INFO L231 Difference]: Finished difference. Result has 1397 places, 1214 transitions, 3621 flow [2022-11-18 18:36:51,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=1278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=3621, PETRI_PLACES=1397, PETRI_TRANSITIONS=1214} [2022-11-18 18:36:51,442 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 199 predicate places. [2022-11-18 18:36:51,443 INFO L495 AbstractCegarLoop]: Abstraction has has 1397 places, 1214 transitions, 3621 flow [2022-11-18 18:36:51,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1073.946153846154) internal successors, (139613), 130 states have internal predecessors, (139613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:51,455 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:51,455 INFO L209 CegarLoopForPetriNet]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:51,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:51,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:51,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1437224740, now seen corresponding path program 1 times [2022-11-18 18:36:51,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:51,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242677296] [2022-11-18 18:36:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:51,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:36:51,734 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:36:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:36:51,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:36:51,941 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:36:51,943 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:36:51,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:36:51,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2022-11-18 18:36:51,944 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:51,945 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:36:51,945 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2022-11-18 18:36:52,055 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:36:52,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1227 places, 1390 transitions, 4540 flow [2022-11-18 18:36:55,080 INFO L130 PetriNetUnfolder]: 404/2825 cut-off events. [2022-11-18 18:36:55,080 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2022-11-18 18:36:55,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3766 conditions, 2825 events. 404/2825 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10365 event pairs, 0 based on Foata normal form. 0/2339 useless extension candidates. Maximal degree in co-relation 3626. Up to 82 conditions per place. [2022-11-18 18:36:55,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 1227 places, 1390 transitions, 4540 flow [2022-11-18 18:36:55,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1227 places, 1390 transitions, 4540 flow [2022-11-18 18:36:55,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:36:55,288 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:36:55,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:36:55,294 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:36:55,294 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:36:55,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:55,294 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:55,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:55,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1348913510, now seen corresponding path program 1 times [2022-11-18 18:36:55,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:55,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594719441] [2022-11-18 18:36:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:55,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:55,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:55,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594719441] [2022-11-18 18:36:55,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594719441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:55,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:55,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:36:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650894975] [2022-11-18 18:36:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:55,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:36:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:36:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:36:55,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1105 out of 1390 [2022-11-18 18:36:55,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1227 places, 1390 transitions, 4540 flow. Second operand has 2 states, 2 states have (on average 1105.5) internal successors, (2211), 2 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:55,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:55,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1105 of 1390 [2022-11-18 18:36:55,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:57,610 INFO L130 PetriNetUnfolder]: 0/2380 cut-off events. [2022-11-18 18:36:57,610 INFO L131 PetriNetUnfolder]: For 12260/12260 co-relation queries the response was YES. [2022-11-18 18:36:57,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 2380 events. 0/2380 cut-off events. For 12260/12260 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 9792 event pairs, 0 based on Foata normal form. 4852/7150 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-11-18 18:36:57,616 INFO L137 encePairwiseOnDemand]: 1146/1390 looper letters, 40 selfloop transitions, 0 changer transitions 11/1145 dead transitions. [2022-11-18 18:36:57,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1227 places, 1145 transitions, 4130 flow [2022-11-18 18:36:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:36:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:36:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2494 transitions. [2022-11-18 18:36:57,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8971223021582734 [2022-11-18 18:36:57,618 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2494 transitions. [2022-11-18 18:36:57,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2494 transitions. [2022-11-18 18:36:57,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:57,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2494 transitions. [2022-11-18 18:36:57,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1247.0) internal successors, (2494), 2 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:57,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1390.0) internal successors, (4170), 3 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:57,623 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1390.0) internal successors, (4170), 3 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:57,623 INFO L175 Difference]: Start difference. First operand has 1227 places, 1390 transitions, 4540 flow. Second operand 2 states and 2494 transitions. [2022-11-18 18:36:57,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1227 places, 1145 transitions, 4130 flow [2022-11-18 18:36:57,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1227 places, 1145 transitions, 2570 flow, removed 780 selfloop flow, removed 0 redundant places. [2022-11-18 18:36:57,649 INFO L231 Difference]: Finished difference. Result has 1227 places, 1134 transitions, 2468 flow [2022-11-18 18:36:57,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=1226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2468, PETRI_PLACES=1227, PETRI_TRANSITIONS=1134} [2022-11-18 18:36:57,650 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 0 predicate places. [2022-11-18 18:36:57,650 INFO L495 AbstractCegarLoop]: Abstraction has has 1227 places, 1134 transitions, 2468 flow [2022-11-18 18:36:57,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1105.5) internal successors, (2211), 2 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:57,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:57,650 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2022-11-18 18:36:57,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1149102427, now seen corresponding path program 1 times [2022-11-18 18:36:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818859383] [2022-11-18 18:36:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:57,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:57,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818859383] [2022-11-18 18:36:57,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818859383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:57,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:57,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:36:57,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827682255] [2022-11-18 18:36:57,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:57,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:36:57,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:57,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:36:57,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:36:57,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1098 out of 1390 [2022-11-18 18:36:57,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1227 places, 1134 transitions, 2468 flow. Second operand has 3 states, 3 states have (on average 1099.0) internal successors, (3297), 3 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:57,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:36:57,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1098 of 1390 [2022-11-18 18:36:57,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:36:59,611 INFO L130 PetriNetUnfolder]: 0/1918 cut-off events. [2022-11-18 18:36:59,611 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-18 18:36:59,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2325 conditions, 1918 events. 0/1918 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6700 event pairs, 0 based on Foata normal form. 0/1878 useless extension candidates. Maximal degree in co-relation 0. Up to 240 conditions per place. [2022-11-18 18:36:59,615 INFO L137 encePairwiseOnDemand]: 1387/1390 looper letters, 49 selfloop transitions, 2 changer transitions 0/1138 dead transitions. [2022-11-18 18:36:59,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1218 places, 1138 transitions, 2578 flow [2022-11-18 18:36:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:36:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:36:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3346 transitions. [2022-11-18 18:36:59,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8023980815347722 [2022-11-18 18:36:59,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3346 transitions. [2022-11-18 18:36:59,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3346 transitions. [2022-11-18 18:36:59,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:36:59,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3346 transitions. [2022-11-18 18:36:59,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1115.3333333333333) internal successors, (3346), 3 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:59,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1390.0) internal successors, (5560), 4 states have internal predecessors, (5560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:59,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1390.0) internal successors, (5560), 4 states have internal predecessors, (5560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:59,624 INFO L175 Difference]: Start difference. First operand has 1227 places, 1134 transitions, 2468 flow. Second operand 3 states and 3346 transitions. [2022-11-18 18:36:59,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1218 places, 1138 transitions, 2578 flow [2022-11-18 18:36:59,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1218 places, 1138 transitions, 2578 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:36:59,634 INFO L231 Difference]: Finished difference. Result has 1219 places, 1135 transitions, 2480 flow [2022-11-18 18:36:59,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=1216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2480, PETRI_PLACES=1219, PETRI_TRANSITIONS=1135} [2022-11-18 18:36:59,635 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, -8 predicate places. [2022-11-18 18:36:59,635 INFO L495 AbstractCegarLoop]: Abstraction has has 1219 places, 1135 transitions, 2480 flow [2022-11-18 18:36:59,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1099.0) internal successors, (3297), 3 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:59,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:36:59,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:59,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2022-11-18 18:36:59,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:36:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1427637263, now seen corresponding path program 1 times [2022-11-18 18:36:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:59,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138206509] [2022-11-18 18:36:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:59,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:59,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138206509] [2022-11-18 18:36:59,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138206509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142093550] [2022-11-18 18:36:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:59,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:59,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:59,703 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:59,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-11-18 18:37:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:01,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:37:01,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:01,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:01,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142093550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:01,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:01,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:37:01,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200758980] [2022-11-18 18:37:01,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:01,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:37:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:01,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:37:01,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:37:01,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-18 18:37:01,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1219 places, 1135 transitions, 2480 flow. Second operand has 10 states, 10 states have (on average 1099.3) internal successors, (10993), 10 states have internal predecessors, (10993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:01,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:01,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-18 18:37:01,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:03,811 INFO L130 PetriNetUnfolder]: 0/1896 cut-off events. [2022-11-18 18:37:03,811 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-18 18:37:03,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2423 conditions, 1896 events. 0/1896 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6570 event pairs, 0 based on Foata normal form. 2/1898 useless extension candidates. Maximal degree in co-relation 0. Up to 155 conditions per place. [2022-11-18 18:37:03,815 INFO L137 encePairwiseOnDemand]: 1384/1390 looper letters, 50 selfloop transitions, 9 changer transitions 0/1145 dead transitions. [2022-11-18 18:37:03,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1227 places, 1145 transitions, 2620 flow [2022-11-18 18:37:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:37:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:37:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9934 transitions. [2022-11-18 18:37:03,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7940847322142286 [2022-11-18 18:37:03,823 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9934 transitions. [2022-11-18 18:37:03,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9934 transitions. [2022-11-18 18:37:03,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:03,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9934 transitions. [2022-11-18 18:37:03,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1103.7777777777778) internal successors, (9934), 9 states have internal predecessors, (9934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:03,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1390.0) internal successors, (13900), 10 states have internal predecessors, (13900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:03,839 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1390.0) internal successors, (13900), 10 states have internal predecessors, (13900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:03,839 INFO L175 Difference]: Start difference. First operand has 1219 places, 1135 transitions, 2480 flow. Second operand 9 states and 9934 transitions. [2022-11-18 18:37:03,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1227 places, 1145 transitions, 2620 flow [2022-11-18 18:37:03,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1226 places, 1145 transitions, 2618 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:37:03,852 INFO L231 Difference]: Finished difference. Result has 1229 places, 1141 transitions, 2528 flow [2022-11-18 18:37:03,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=1218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2528, PETRI_PLACES=1229, PETRI_TRANSITIONS=1141} [2022-11-18 18:37:03,852 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 2 predicate places. [2022-11-18 18:37:03,853 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 1141 transitions, 2528 flow [2022-11-18 18:37:03,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1099.3) internal successors, (10993), 10 states have internal predecessors, (10993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:03,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:03,854 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:03,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-11-18 18:37:04,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-11-18 18:37:04,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:04,055 INFO L85 PathProgramCache]: Analyzing trace with hash -689843398, now seen corresponding path program 1 times [2022-11-18 18:37:04,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:04,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510485508] [2022-11-18 18:37:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:04,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:04,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510485508] [2022-11-18 18:37:04,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510485508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716916834] [2022-11-18 18:37:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:04,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:04,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:04,147 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:04,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-11-18 18:37:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:05,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:37:05,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:05,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:06,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716916834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:06,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:06,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:37:06,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053884604] [2022-11-18 18:37:06,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:37:06,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:06,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:37:06,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:37:06,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-18 18:37:06,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 1141 transitions, 2528 flow. Second operand has 18 states, 18 states have (on average 1099.611111111111) internal successors, (19793), 18 states have internal predecessors, (19793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:06,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:06,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-18 18:37:06,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:08,677 INFO L130 PetriNetUnfolder]: 0/1852 cut-off events. [2022-11-18 18:37:08,677 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2022-11-18 18:37:08,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 1852 events. 0/1852 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6244 event pairs, 0 based on Foata normal form. 4/1856 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2022-11-18 18:37:08,682 INFO L137 encePairwiseOnDemand]: 1384/1390 looper letters, 58 selfloop transitions, 21 changer transitions 0/1165 dead transitions. [2022-11-18 18:37:08,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 1165 transitions, 2794 flow [2022-11-18 18:37:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:37:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:37:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23120 transitions. [2022-11-18 18:37:08,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7920520726276122 [2022-11-18 18:37:08,696 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 23120 transitions. [2022-11-18 18:37:08,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23120 transitions. [2022-11-18 18:37:08,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:08,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 23120 transitions. [2022-11-18 18:37:08,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1100.952380952381) internal successors, (23120), 21 states have internal predecessors, (23120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:08,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1390.0) internal successors, (30580), 22 states have internal predecessors, (30580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:08,733 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1390.0) internal successors, (30580), 22 states have internal predecessors, (30580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:08,733 INFO L175 Difference]: Start difference. First operand has 1229 places, 1141 transitions, 2528 flow. Second operand 21 states and 23120 transitions. [2022-11-18 18:37:08,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1249 places, 1165 transitions, 2794 flow [2022-11-18 18:37:08,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1248 places, 1165 transitions, 2780 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:37:08,749 INFO L231 Difference]: Finished difference. Result has 1253 places, 1154 transitions, 2652 flow [2022-11-18 18:37:08,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2522, PETRI_DIFFERENCE_MINUEND_PLACES=1228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2652, PETRI_PLACES=1253, PETRI_TRANSITIONS=1154} [2022-11-18 18:37:08,750 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 26 predicate places. [2022-11-18 18:37:08,750 INFO L495 AbstractCegarLoop]: Abstraction has has 1253 places, 1154 transitions, 2652 flow [2022-11-18 18:37:08,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1099.611111111111) internal successors, (19793), 18 states have internal predecessors, (19793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:08,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:08,753 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:08,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-11-18 18:37:08,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-11-18 18:37:08,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:08,953 INFO L85 PathProgramCache]: Analyzing trace with hash 117773724, now seen corresponding path program 1 times [2022-11-18 18:37:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:08,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777114804] [2022-11-18 18:37:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:08,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:09,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:09,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777114804] [2022-11-18 18:37:09,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777114804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:09,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061286611] [2022-11-18 18:37:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:09,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:09,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:09,162 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:09,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-11-18 18:37:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:10,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:37:10,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:11,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:11,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061286611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:11,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:11,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:37:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497594548] [2022-11-18 18:37:11,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:11,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:37:11,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:37:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:37:11,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-18 18:37:11,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1253 places, 1154 transitions, 2652 flow. Second operand has 34 states, 34 states have (on average 1099.7941176470588) internal successors, (37393), 34 states have internal predecessors, (37393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:11,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:11,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-18 18:37:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:14,347 INFO L130 PetriNetUnfolder]: 0/1764 cut-off events. [2022-11-18 18:37:14,347 INFO L131 PetriNetUnfolder]: For 951/951 co-relation queries the response was YES. [2022-11-18 18:37:14,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2860 conditions, 1764 events. 0/1764 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5694 event pairs, 0 based on Foata normal form. 8/1772 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-11-18 18:37:14,352 INFO L137 encePairwiseOnDemand]: 1384/1390 looper letters, 74 selfloop transitions, 45 changer transitions 0/1205 dead transitions. [2022-11-18 18:37:14,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1297 places, 1205 transitions, 3206 flow [2022-11-18 18:37:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:37:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:37:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49492 transitions. [2022-11-18 18:37:14,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912390087929656 [2022-11-18 18:37:14,377 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 49492 transitions. [2022-11-18 18:37:14,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 49492 transitions. [2022-11-18 18:37:14,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:14,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 49492 transitions. [2022-11-18 18:37:14,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1099.8222222222223) internal successors, (49492), 45 states have internal predecessors, (49492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:14,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1390.0) internal successors, (63940), 46 states have internal predecessors, (63940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:14,452 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1390.0) internal successors, (63940), 46 states have internal predecessors, (63940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:14,452 INFO L175 Difference]: Start difference. First operand has 1253 places, 1154 transitions, 2652 flow. Second operand 45 states and 49492 transitions. [2022-11-18 18:37:14,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1297 places, 1205 transitions, 3206 flow [2022-11-18 18:37:14,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1291 places, 1205 transitions, 3166 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:37:14,470 INFO L231 Difference]: Finished difference. Result has 1300 places, 1179 transitions, 2930 flow [2022-11-18 18:37:14,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=1247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2930, PETRI_PLACES=1300, PETRI_TRANSITIONS=1179} [2022-11-18 18:37:14,471 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 73 predicate places. [2022-11-18 18:37:14,471 INFO L495 AbstractCegarLoop]: Abstraction has has 1300 places, 1179 transitions, 2930 flow [2022-11-18 18:37:14,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1099.7941176470588) internal successors, (37393), 34 states have internal predecessors, (37393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:14,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:14,476 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:14,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-11-18 18:37:14,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-11-18 18:37:14,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1125870960, now seen corresponding path program 1 times [2022-11-18 18:37:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:14,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589632317] [2022-11-18 18:37:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:15,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589632317] [2022-11-18 18:37:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589632317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17720016] [2022-11-18 18:37:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:15,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:15,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:15,327 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:15,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-11-18 18:37:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:37:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:17,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:18,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17720016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:18,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:18,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:37:18,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4775996] [2022-11-18 18:37:18,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:18,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:37:18,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:37:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:37:18,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-18 18:37:18,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1300 places, 1179 transitions, 2930 flow. Second operand has 66 states, 66 states have (on average 1099.8939393939395) internal successors, (72593), 66 states have internal predecessors, (72593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:18,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:18,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-18 18:37:18,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:22,589 INFO L130 PetriNetUnfolder]: 0/1588 cut-off events. [2022-11-18 18:37:22,589 INFO L131 PetriNetUnfolder]: For 3313/3313 co-relation queries the response was YES. [2022-11-18 18:37:22,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2815 conditions, 1588 events. 0/1588 cut-off events. For 3313/3313 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4516 event pairs, 0 based on Foata normal form. 16/1604 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2022-11-18 18:37:22,593 INFO L137 encePairwiseOnDemand]: 1384/1390 looper letters, 106 selfloop transitions, 93 changer transitions 0/1285 dead transitions. [2022-11-18 18:37:22,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1392 places, 1285 transitions, 4176 flow [2022-11-18 18:37:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:37:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:37:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102236 transitions. [2022-11-18 18:37:22,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.790871818674093 [2022-11-18 18:37:22,636 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 102236 transitions. [2022-11-18 18:37:22,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 102236 transitions. [2022-11-18 18:37:22,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:22,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 102236 transitions. [2022-11-18 18:37:22,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1099.3118279569892) internal successors, (102236), 93 states have internal predecessors, (102236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:22,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1390.0) internal successors, (130660), 94 states have internal predecessors, (130660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:22,786 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1390.0) internal successors, (130660), 94 states have internal predecessors, (130660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:22,786 INFO L175 Difference]: Start difference. First operand has 1300 places, 1179 transitions, 2930 flow. Second operand 93 states and 102236 transitions. [2022-11-18 18:37:22,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1392 places, 1285 transitions, 4176 flow [2022-11-18 18:37:22,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1374 places, 1285 transitions, 4088 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:37:22,815 INFO L231 Difference]: Finished difference. Result has 1391 places, 1228 transitions, 3564 flow [2022-11-18 18:37:22,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=1282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3564, PETRI_PLACES=1391, PETRI_TRANSITIONS=1228} [2022-11-18 18:37:22,816 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 164 predicate places. [2022-11-18 18:37:22,816 INFO L495 AbstractCegarLoop]: Abstraction has has 1391 places, 1228 transitions, 3564 flow [2022-11-18 18:37:22,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1099.8939393939395) internal successors, (72593), 66 states have internal predecessors, (72593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:22,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:22,825 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:22,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-11-18 18:37:23,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:23,025 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash 350399800, now seen corresponding path program 1 times [2022-11-18 18:37:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:23,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034152688] [2022-11-18 18:37:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:25,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034152688] [2022-11-18 18:37:25,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034152688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810457046] [2022-11-18 18:37:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:25,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:25,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:25,344 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:25,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-18 18:37:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:37:27,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:27,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:31,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810457046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:31,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:31,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:37:31,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473494869] [2022-11-18 18:37:31,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:31,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:37:31,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:31,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:37:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:37:31,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-18 18:37:31,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1391 places, 1228 transitions, 3564 flow. Second operand has 130 states, 130 states have (on average 1099.946153846154) internal successors, (142993), 130 states have internal predecessors, (142993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:31,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:31,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-18 18:37:31,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:37,405 INFO L130 PetriNetUnfolder]: 0/1478 cut-off events. [2022-11-18 18:37:37,405 INFO L131 PetriNetUnfolder]: For 5668/5668 co-relation queries the response was YES. [2022-11-18 18:37:37,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1478 events. 0/1478 cut-off events. For 5668/5668 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3815 event pairs, 0 based on Foata normal form. 10/1488 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2022-11-18 18:37:37,407 INFO L137 encePairwiseOnDemand]: 1385/1390 looper letters, 123 selfloop transitions, 121 changer transitions 0/1320 dead transitions. [2022-11-18 18:37:37,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1502 places, 1320 transitions, 4872 flow [2022-11-18 18:37:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-18 18:37:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2022-11-18 18:37:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135185 transitions. [2022-11-18 18:37:37,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7906942738492133 [2022-11-18 18:37:37,459 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 135185 transitions. [2022-11-18 18:37:37,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 135185 transitions. [2022-11-18 18:37:37,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:37,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 135185 transitions. [2022-11-18 18:37:37,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 1099.0650406504064) internal successors, (135185), 123 states have internal predecessors, (135185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:37,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 1390.0) internal successors, (172360), 124 states have internal predecessors, (172360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:37,668 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 1390.0) internal successors, (172360), 124 states have internal predecessors, (172360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:37,668 INFO L175 Difference]: Start difference. First operand has 1391 places, 1228 transitions, 3564 flow. Second operand 123 states and 135185 transitions. [2022-11-18 18:37:37,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1502 places, 1320 transitions, 4872 flow [2022-11-18 18:37:37,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1429 places, 1320 transitions, 4460 flow, removed 27 selfloop flow, removed 73 redundant places. [2022-11-18 18:37:37,695 INFO L231 Difference]: Finished difference. Result has 1429 places, 1244 transitions, 3714 flow [2022-11-18 18:37:37,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=3220, PETRI_DIFFERENCE_MINUEND_PLACES=1307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=3714, PETRI_PLACES=1429, PETRI_TRANSITIONS=1244} [2022-11-18 18:37:37,695 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 202 predicate places. [2022-11-18 18:37:37,695 INFO L495 AbstractCegarLoop]: Abstraction has has 1429 places, 1244 transitions, 3714 flow [2022-11-18 18:37:37,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1099.946153846154) internal successors, (142993), 130 states have internal predecessors, (142993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:37,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:37,707 INFO L209 CegarLoopForPetriNet]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:37,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-11-18 18:37:37,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:37,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1201872511, now seen corresponding path program 1 times [2022-11-18 18:37:37,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:37,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86415398] [2022-11-18 18:37:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:37,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:37:37,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:37:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:37:38,155 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:37:38,155 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:37:38,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:37:38,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:37:38,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2022-11-18 18:37:38,156 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:38,156 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:37:38,156 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2022-11-18 18:37:38,270 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:37:38,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1256 places, 1423 transitions, 4691 flow [2022-11-18 18:37:41,565 INFO L130 PetriNetUnfolder]: 414/2894 cut-off events. [2022-11-18 18:37:41,565 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2022-11-18 18:37:41,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 2894 events. 414/2894 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10637 event pairs, 0 based on Foata normal form. 0/2396 useless extension candidates. Maximal degree in co-relation 3738. Up to 84 conditions per place. [2022-11-18 18:37:41,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 1256 places, 1423 transitions, 4691 flow [2022-11-18 18:37:41,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1256 places, 1423 transitions, 4691 flow [2022-11-18 18:37:41,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:37:41,746 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:37:41,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:37:41,751 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:37:41,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:37:41,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:41,751 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:41,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1015330778, now seen corresponding path program 1 times [2022-11-18 18:37:41,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:41,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187824586] [2022-11-18 18:37:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:41,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:41,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:41,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187824586] [2022-11-18 18:37:41,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187824586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:37:41,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:37:41,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:37:41,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261667561] [2022-11-18 18:37:41,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:37:41,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:37:41,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:37:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:37:41,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1131 out of 1423 [2022-11-18 18:37:41,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1256 places, 1423 transitions, 4691 flow. Second operand has 2 states, 2 states have (on average 1131.5) internal successors, (2263), 2 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:41,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:41,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1131 of 1423 [2022-11-18 18:37:41,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:44,303 INFO L130 PetriNetUnfolder]: 0/2438 cut-off events. [2022-11-18 18:37:44,304 INFO L131 PetriNetUnfolder]: For 13161/13161 co-relation queries the response was YES. [2022-11-18 18:37:44,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3465 conditions, 2438 events. 0/2438 cut-off events. For 13161/13161 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 10039 event pairs, 0 based on Foata normal form. 5096/7450 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-18 18:37:44,308 INFO L137 encePairwiseOnDemand]: 1173/1423 looper letters, 41 selfloop transitions, 0 changer transitions 11/1172 dead transitions. [2022-11-18 18:37:44,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1256 places, 1172 transitions, 4271 flow [2022-11-18 18:37:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:37:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:37:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2553 transitions. [2022-11-18 18:37:44,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8970484891075193 [2022-11-18 18:37:44,311 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2553 transitions. [2022-11-18 18:37:44,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2553 transitions. [2022-11-18 18:37:44,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:44,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2553 transitions. [2022-11-18 18:37:44,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1276.5) internal successors, (2553), 2 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:44,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1423.0) internal successors, (4269), 3 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:44,315 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1423.0) internal successors, (4269), 3 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:44,315 INFO L175 Difference]: Start difference. First operand has 1256 places, 1423 transitions, 4691 flow. Second operand 2 states and 2553 transitions. [2022-11-18 18:37:44,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1256 places, 1172 transitions, 4271 flow [2022-11-18 18:37:44,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1256 places, 1172 transitions, 2631 flow, removed 820 selfloop flow, removed 0 redundant places. [2022-11-18 18:37:44,354 INFO L231 Difference]: Finished difference. Result has 1256 places, 1161 transitions, 2527 flow [2022-11-18 18:37:44,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2549, PETRI_DIFFERENCE_MINUEND_PLACES=1255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2527, PETRI_PLACES=1256, PETRI_TRANSITIONS=1161} [2022-11-18 18:37:44,354 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 0 predicate places. [2022-11-18 18:37:44,354 INFO L495 AbstractCegarLoop]: Abstraction has has 1256 places, 1161 transitions, 2527 flow [2022-11-18 18:37:44,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1131.5) internal successors, (2263), 2 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:44,355 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:44,355 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:44,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2022-11-18 18:37:44,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash -781620581, now seen corresponding path program 1 times [2022-11-18 18:37:44,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:44,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655776076] [2022-11-18 18:37:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:44,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655776076] [2022-11-18 18:37:44,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655776076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:37:44,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:37:44,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:37:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209006695] [2022-11-18 18:37:44,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:37:44,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:37:44,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:37:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:37:44,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1124 out of 1423 [2022-11-18 18:37:44,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1256 places, 1161 transitions, 2527 flow. Second operand has 3 states, 3 states have (on average 1125.0) internal successors, (3375), 3 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:44,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:44,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1124 of 1423 [2022-11-18 18:37:44,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:46,432 INFO L130 PetriNetUnfolder]: 0/1965 cut-off events. [2022-11-18 18:37:46,433 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-18 18:37:46,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1965 events. 0/1965 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6869 event pairs, 0 based on Foata normal form. 0/1924 useless extension candidates. Maximal degree in co-relation 0. Up to 246 conditions per place. [2022-11-18 18:37:46,437 INFO L137 encePairwiseOnDemand]: 1420/1423 looper letters, 50 selfloop transitions, 2 changer transitions 0/1165 dead transitions. [2022-11-18 18:37:46,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1247 places, 1165 transitions, 2639 flow [2022-11-18 18:37:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:37:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:37:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3425 transitions. [2022-11-18 18:37:46,440 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8022956195830405 [2022-11-18 18:37:46,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3425 transitions. [2022-11-18 18:37:46,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3425 transitions. [2022-11-18 18:37:46,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:46,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3425 transitions. [2022-11-18 18:37:46,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1141.6666666666667) internal successors, (3425), 3 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:46,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1423.0) internal successors, (5692), 4 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:46,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1423.0) internal successors, (5692), 4 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:46,446 INFO L175 Difference]: Start difference. First operand has 1256 places, 1161 transitions, 2527 flow. Second operand 3 states and 3425 transitions. [2022-11-18 18:37:46,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1247 places, 1165 transitions, 2639 flow [2022-11-18 18:37:46,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1247 places, 1165 transitions, 2639 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:37:46,457 INFO L231 Difference]: Finished difference. Result has 1248 places, 1162 transitions, 2539 flow [2022-11-18 18:37:46,458 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=1245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2539, PETRI_PLACES=1248, PETRI_TRANSITIONS=1162} [2022-11-18 18:37:46,458 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, -8 predicate places. [2022-11-18 18:37:46,458 INFO L495 AbstractCegarLoop]: Abstraction has has 1248 places, 1162 transitions, 2539 flow [2022-11-18 18:37:46,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1125.0) internal successors, (3375), 3 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:46,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:46,459 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:46,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2022-11-18 18:37:46,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash -688095537, now seen corresponding path program 1 times [2022-11-18 18:37:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:46,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894567438] [2022-11-18 18:37:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:46,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:46,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894567438] [2022-11-18 18:37:46,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894567438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371700824] [2022-11-18 18:37:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:46,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:46,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:46,516 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:46,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-11-18 18:37:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:48,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:37:48,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:48,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:48,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371700824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:48,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:48,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:37:48,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647143437] [2022-11-18 18:37:48,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:48,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:37:48,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:48,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:37:48,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:37:48,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-18 18:37:48,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1248 places, 1162 transitions, 2539 flow. Second operand has 10 states, 10 states have (on average 1125.3) internal successors, (11253), 10 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:48,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:48,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-18 18:37:48,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:50,625 INFO L130 PetriNetUnfolder]: 0/1943 cut-off events. [2022-11-18 18:37:50,625 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-18 18:37:50,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 1943 events. 0/1943 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6701 event pairs, 0 based on Foata normal form. 2/1945 useless extension candidates. Maximal degree in co-relation 0. Up to 159 conditions per place. [2022-11-18 18:37:50,630 INFO L137 encePairwiseOnDemand]: 1417/1423 looper letters, 51 selfloop transitions, 9 changer transitions 0/1172 dead transitions. [2022-11-18 18:37:50,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1256 places, 1172 transitions, 2681 flow [2022-11-18 18:37:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:37:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:37:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10169 transitions. [2022-11-18 18:37:50,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7940188959162958 [2022-11-18 18:37:50,637 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 10169 transitions. [2022-11-18 18:37:50,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10169 transitions. [2022-11-18 18:37:50,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:50,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 10169 transitions. [2022-11-18 18:37:50,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1129.888888888889) internal successors, (10169), 9 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:50,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1423.0) internal successors, (14230), 10 states have internal predecessors, (14230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:50,653 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1423.0) internal successors, (14230), 10 states have internal predecessors, (14230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:50,653 INFO L175 Difference]: Start difference. First operand has 1248 places, 1162 transitions, 2539 flow. Second operand 9 states and 10169 transitions. [2022-11-18 18:37:50,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1256 places, 1172 transitions, 2681 flow [2022-11-18 18:37:50,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1255 places, 1172 transitions, 2679 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:37:50,666 INFO L231 Difference]: Finished difference. Result has 1258 places, 1168 transitions, 2587 flow [2022-11-18 18:37:50,667 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=1247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2587, PETRI_PLACES=1258, PETRI_TRANSITIONS=1168} [2022-11-18 18:37:50,667 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 2 predicate places. [2022-11-18 18:37:50,667 INFO L495 AbstractCegarLoop]: Abstraction has has 1258 places, 1168 transitions, 2587 flow [2022-11-18 18:37:50,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1125.3) internal successors, (11253), 10 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:50,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:50,669 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:50,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-11-18 18:37:50,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-11-18 18:37:50,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:50,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:50,870 INFO L85 PathProgramCache]: Analyzing trace with hash 942842106, now seen corresponding path program 1 times [2022-11-18 18:37:50,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:50,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011677786] [2022-11-18 18:37:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:50,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:50,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:50,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011677786] [2022-11-18 18:37:50,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011677786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:50,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722160936] [2022-11-18 18:37:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:50,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:50,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:50,959 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:50,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-11-18 18:37:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:52,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:37:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:52,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:52,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722160936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:52,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:52,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:37:52,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549326236] [2022-11-18 18:37:52,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:52,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:37:52,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:52,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:37:52,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:37:52,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-18 18:37:52,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1258 places, 1168 transitions, 2587 flow. Second operand has 18 states, 18 states have (on average 1125.611111111111) internal successors, (20261), 18 states have internal predecessors, (20261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:52,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:52,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-18 18:37:52,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:37:55,669 INFO L130 PetriNetUnfolder]: 0/1899 cut-off events. [2022-11-18 18:37:55,669 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-18 18:37:55,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 1899 events. 0/1899 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6414 event pairs, 0 based on Foata normal form. 4/1903 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2022-11-18 18:37:55,673 INFO L137 encePairwiseOnDemand]: 1417/1423 looper letters, 59 selfloop transitions, 21 changer transitions 0/1192 dead transitions. [2022-11-18 18:37:55,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1278 places, 1192 transitions, 2855 flow [2022-11-18 18:37:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:37:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:37:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23667 transitions. [2022-11-18 18:37:55,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791988756148981 [2022-11-18 18:37:55,684 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 23667 transitions. [2022-11-18 18:37:55,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23667 transitions. [2022-11-18 18:37:55,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:37:55,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 23667 transitions. [2022-11-18 18:37:55,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1127.0) internal successors, (23667), 21 states have internal predecessors, (23667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:55,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1423.0) internal successors, (31306), 22 states have internal predecessors, (31306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:55,717 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1423.0) internal successors, (31306), 22 states have internal predecessors, (31306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:55,717 INFO L175 Difference]: Start difference. First operand has 1258 places, 1168 transitions, 2587 flow. Second operand 21 states and 23667 transitions. [2022-11-18 18:37:55,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1278 places, 1192 transitions, 2855 flow [2022-11-18 18:37:55,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1277 places, 1192 transitions, 2841 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:37:55,733 INFO L231 Difference]: Finished difference. Result has 1282 places, 1181 transitions, 2711 flow [2022-11-18 18:37:55,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=1257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2711, PETRI_PLACES=1282, PETRI_TRANSITIONS=1181} [2022-11-18 18:37:55,734 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 26 predicate places. [2022-11-18 18:37:55,734 INFO L495 AbstractCegarLoop]: Abstraction has has 1282 places, 1181 transitions, 2711 flow [2022-11-18 18:37:55,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1125.611111111111) internal successors, (20261), 18 states have internal predecessors, (20261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:55,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:37:55,736 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:55,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-11-18 18:37:55,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-11-18 18:37:55,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:37:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash -491255460, now seen corresponding path program 1 times [2022-11-18 18:37:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261947307] [2022-11-18 18:37:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:55,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:56,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:56,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261947307] [2022-11-18 18:37:56,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261947307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:56,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787322916] [2022-11-18 18:37:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:56,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:56,139 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:56,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-11-18 18:37:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:37:57,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:58,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:58,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787322916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:58,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:58,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:37:58,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906835268] [2022-11-18 18:37:58,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:58,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:37:58,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:37:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:37:58,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-18 18:37:58,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1282 places, 1181 transitions, 2711 flow. Second operand has 34 states, 34 states have (on average 1125.7941176470588) internal successors, (38277), 34 states have internal predecessors, (38277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:58,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:37:58,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-18 18:37:58,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:01,283 INFO L130 PetriNetUnfolder]: 0/1811 cut-off events. [2022-11-18 18:38:01,283 INFO L131 PetriNetUnfolder]: For 978/978 co-relation queries the response was YES. [2022-11-18 18:38:01,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2937 conditions, 1811 events. 0/1811 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5865 event pairs, 0 based on Foata normal form. 8/1819 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-11-18 18:38:01,287 INFO L137 encePairwiseOnDemand]: 1417/1423 looper letters, 75 selfloop transitions, 45 changer transitions 0/1232 dead transitions. [2022-11-18 18:38:01,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1326 places, 1232 transitions, 3267 flow [2022-11-18 18:38:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:38:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:38:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50663 transitions. [2022-11-18 18:38:01,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911767002420551 [2022-11-18 18:38:01,309 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 50663 transitions. [2022-11-18 18:38:01,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 50663 transitions. [2022-11-18 18:38:01,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:01,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 50663 transitions. [2022-11-18 18:38:01,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1125.8444444444444) internal successors, (50663), 45 states have internal predecessors, (50663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:01,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1423.0) internal successors, (65458), 46 states have internal predecessors, (65458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:01,381 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1423.0) internal successors, (65458), 46 states have internal predecessors, (65458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:01,381 INFO L175 Difference]: Start difference. First operand has 1282 places, 1181 transitions, 2711 flow. Second operand 45 states and 50663 transitions. [2022-11-18 18:38:01,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1326 places, 1232 transitions, 3267 flow [2022-11-18 18:38:01,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1320 places, 1232 transitions, 3227 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:38:01,398 INFO L231 Difference]: Finished difference. Result has 1329 places, 1206 transitions, 2989 flow [2022-11-18 18:38:01,399 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=1276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2989, PETRI_PLACES=1329, PETRI_TRANSITIONS=1206} [2022-11-18 18:38:01,399 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 73 predicate places. [2022-11-18 18:38:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 1329 places, 1206 transitions, 2989 flow [2022-11-18 18:38:01,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1125.7941176470588) internal successors, (38277), 34 states have internal predecessors, (38277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:01,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:01,404 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:01,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-11-18 18:38:01,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-11-18 18:38:01,604 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1199451568, now seen corresponding path program 1 times [2022-11-18 18:38:01,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:01,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114352403] [2022-11-18 18:38:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:01,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114352403] [2022-11-18 18:38:02,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114352403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316437960] [2022-11-18 18:38:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:02,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:02,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:02,204 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:02,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-11-18 18:38:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:38:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:04,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:05,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316437960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:05,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:05,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:38:05,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836054450] [2022-11-18 18:38:05,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:05,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:38:05,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:38:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:38:05,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-18 18:38:05,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1329 places, 1206 transitions, 2989 flow. Second operand has 66 states, 66 states have (on average 1125.8939393939395) internal successors, (74309), 66 states have internal predecessors, (74309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:05,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:05,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-18 18:38:05,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:09,591 INFO L130 PetriNetUnfolder]: 0/1635 cut-off events. [2022-11-18 18:38:09,592 INFO L131 PetriNetUnfolder]: For 3434/3434 co-relation queries the response was YES. [2022-11-18 18:38:09,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2905 conditions, 1635 events. 0/1635 cut-off events. For 3434/3434 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4686 event pairs, 0 based on Foata normal form. 16/1651 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-18 18:38:09,595 INFO L137 encePairwiseOnDemand]: 1417/1423 looper letters, 107 selfloop transitions, 93 changer transitions 0/1312 dead transitions. [2022-11-18 18:38:09,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1421 places, 1312 transitions, 4237 flow [2022-11-18 18:38:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:38:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:38:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104655 transitions. [2022-11-18 18:38:09,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7908099653163466 [2022-11-18 18:38:09,639 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 104655 transitions. [2022-11-18 18:38:09,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 104655 transitions. [2022-11-18 18:38:09,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:09,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 104655 transitions. [2022-11-18 18:38:09,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1125.3225806451612) internal successors, (104655), 93 states have internal predecessors, (104655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:09,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1423.0) internal successors, (133762), 94 states have internal predecessors, (133762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:09,792 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1423.0) internal successors, (133762), 94 states have internal predecessors, (133762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:09,792 INFO L175 Difference]: Start difference. First operand has 1329 places, 1206 transitions, 2989 flow. Second operand 93 states and 104655 transitions. [2022-11-18 18:38:09,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1421 places, 1312 transitions, 4237 flow [2022-11-18 18:38:09,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1403 places, 1312 transitions, 4149 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:38:09,823 INFO L231 Difference]: Finished difference. Result has 1420 places, 1255 transitions, 3623 flow [2022-11-18 18:38:09,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=1311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3623, PETRI_PLACES=1420, PETRI_TRANSITIONS=1255} [2022-11-18 18:38:09,824 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 164 predicate places. [2022-11-18 18:38:09,825 INFO L495 AbstractCegarLoop]: Abstraction has has 1420 places, 1255 transitions, 3623 flow [2022-11-18 18:38:09,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1125.8939393939395) internal successors, (74309), 66 states have internal predecessors, (74309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:09,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:09,832 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:09,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:10,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-11-18 18:38:10,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash -454261512, now seen corresponding path program 1 times [2022-11-18 18:38:10,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:10,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636098489] [2022-11-18 18:38:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:10,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:12,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636098489] [2022-11-18 18:38:12,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636098489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:12,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414329529] [2022-11-18 18:38:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:12,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:12,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:12,541 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:12,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-11-18 18:38:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:38:14,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:14,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:18,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414329529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:18,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:18,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:38:18,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041317252] [2022-11-18 18:38:18,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:18,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:38:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:18,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:38:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:38:18,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-18 18:38:18,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1420 places, 1255 transitions, 3623 flow. Second operand has 130 states, 130 states have (on average 1125.946153846154) internal successors, (146373), 130 states have internal predecessors, (146373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:18,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:18,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-18 18:38:18,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:24,595 INFO L130 PetriNetUnfolder]: 0/1514 cut-off events. [2022-11-18 18:38:24,595 INFO L131 PetriNetUnfolder]: For 6165/6165 co-relation queries the response was YES. [2022-11-18 18:38:24,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2760 conditions, 1514 events. 0/1514 cut-off events. For 6165/6165 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3913 event pairs, 0 based on Foata normal form. 11/1525 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-18 18:38:24,597 INFO L137 encePairwiseOnDemand]: 1418/1423 looper letters, 126 selfloop transitions, 124 changer transitions 0/1352 dead transitions. [2022-11-18 18:38:24,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1534 places, 1352 transitions, 4997 flow [2022-11-18 18:38:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-18 18:38:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-11-18 18:38:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141759 transitions. [2022-11-18 18:38:24,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7906334705350868 [2022-11-18 18:38:24,653 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 141759 transitions. [2022-11-18 18:38:24,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 141759 transitions. [2022-11-18 18:38:24,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:24,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 141759 transitions. [2022-11-18 18:38:24,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 1125.0714285714287) internal successors, (141759), 126 states have internal predecessors, (141759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:24,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 1423.0) internal successors, (180721), 127 states have internal predecessors, (180721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:24,855 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 1423.0) internal successors, (180721), 127 states have internal predecessors, (180721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:24,855 INFO L175 Difference]: Start difference. First operand has 1420 places, 1255 transitions, 3623 flow. Second operand 126 states and 141759 transitions. [2022-11-18 18:38:24,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1534 places, 1352 transitions, 4997 flow [2022-11-18 18:38:24,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1461 places, 1352 transitions, 4575 flow, removed 28 selfloop flow, removed 73 redundant places. [2022-11-18 18:38:24,879 INFO L231 Difference]: Finished difference. Result has 1461 places, 1274 transitions, 3807 flow [2022-11-18 18:38:24,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=1336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=3807, PETRI_PLACES=1461, PETRI_TRANSITIONS=1274} [2022-11-18 18:38:24,880 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 205 predicate places. [2022-11-18 18:38:24,880 INFO L495 AbstractCegarLoop]: Abstraction has has 1461 places, 1274 transitions, 3807 flow [2022-11-18 18:38:24,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1125.946153846154) internal successors, (146373), 130 states have internal predecessors, (146373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:24,891 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:24,892 INFO L209 CegarLoopForPetriNet]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:24,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-11-18 18:38:25,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:25,092 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1934596251, now seen corresponding path program 1 times [2022-11-18 18:38:25,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:25,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527636837] [2022-11-18 18:38:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:25,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:38:25,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:38:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:38:25,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:38:25,401 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:38:25,401 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:38:25,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:38:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2022-11-18 18:38:25,401 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:25,401 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:38:25,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2022-11-18 18:38:25,518 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:38:25,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1285 places, 1456 transitions, 4844 flow [2022-11-18 18:38:28,325 INFO L130 PetriNetUnfolder]: 424/2963 cut-off events. [2022-11-18 18:38:28,325 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2022-11-18 18:38:28,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3993 conditions, 2963 events. 424/2963 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10901 event pairs, 0 based on Foata normal form. 0/2453 useless extension candidates. Maximal degree in co-relation 3851. Up to 86 conditions per place. [2022-11-18 18:38:28,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 1285 places, 1456 transitions, 4844 flow [2022-11-18 18:38:28,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1285 places, 1456 transitions, 4844 flow [2022-11-18 18:38:28,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:38:28,578 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:38:28,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:38:28,582 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:38:28,582 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:38:28,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:28,582 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:28,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1508760538, now seen corresponding path program 1 times [2022-11-18 18:38:28,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:28,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591301604] [2022-11-18 18:38:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:28,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:28,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:28,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591301604] [2022-11-18 18:38:28,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591301604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:28,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:38:28,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:38:28,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314538065] [2022-11-18 18:38:28,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:28,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:38:28,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:38:28,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:38:28,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1157 out of 1456 [2022-11-18 18:38:28,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1285 places, 1456 transitions, 4844 flow. Second operand has 2 states, 2 states have (on average 1157.5) internal successors, (2315), 2 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:28,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:28,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1157 of 1456 [2022-11-18 18:38:28,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:31,469 INFO L130 PetriNetUnfolder]: 0/2496 cut-off events. [2022-11-18 18:38:31,469 INFO L131 PetriNetUnfolder]: For 14105/14105 co-relation queries the response was YES. [2022-11-18 18:38:31,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3569 conditions, 2496 events. 0/2496 cut-off events. For 14105/14105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 10329 event pairs, 0 based on Foata normal form. 5346/7756 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-18 18:38:31,474 INFO L137 encePairwiseOnDemand]: 1200/1456 looper letters, 42 selfloop transitions, 0 changer transitions 11/1199 dead transitions. [2022-11-18 18:38:31,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1285 places, 1199 transitions, 4414 flow [2022-11-18 18:38:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:38:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:38:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2612 transitions. [2022-11-18 18:38:31,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.896978021978022 [2022-11-18 18:38:31,477 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2612 transitions. [2022-11-18 18:38:31,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2612 transitions. [2022-11-18 18:38:31,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:31,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2612 transitions. [2022-11-18 18:38:31,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1306.0) internal successors, (2612), 2 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:31,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1456.0) internal successors, (4368), 3 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:31,481 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1456.0) internal successors, (4368), 3 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:31,481 INFO L175 Difference]: Start difference. First operand has 1285 places, 1456 transitions, 4844 flow. Second operand 2 states and 2612 transitions. [2022-11-18 18:38:31,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1285 places, 1199 transitions, 4414 flow [2022-11-18 18:38:31,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1285 places, 1199 transitions, 2692 flow, removed 861 selfloop flow, removed 0 redundant places. [2022-11-18 18:38:31,508 INFO L231 Difference]: Finished difference. Result has 1285 places, 1188 transitions, 2586 flow [2022-11-18 18:38:31,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=1284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2586, PETRI_PLACES=1285, PETRI_TRANSITIONS=1188} [2022-11-18 18:38:31,509 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, 0 predicate places. [2022-11-18 18:38:31,509 INFO L495 AbstractCegarLoop]: Abstraction has has 1285 places, 1188 transitions, 2586 flow [2022-11-18 18:38:31,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1157.5) internal successors, (2315), 2 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:31,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:31,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:31,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2022-11-18 18:38:31,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:31,510 INFO L85 PathProgramCache]: Analyzing trace with hash -288190821, now seen corresponding path program 1 times [2022-11-18 18:38:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:31,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025604992] [2022-11-18 18:38:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:31,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:31,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025604992] [2022-11-18 18:38:31,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025604992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:31,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:38:31,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:38:31,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642175949] [2022-11-18 18:38:31,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:31,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:38:31,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:38:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:38:31,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1150 out of 1456 [2022-11-18 18:38:31,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1285 places, 1188 transitions, 2586 flow. Second operand has 3 states, 3 states have (on average 1151.0) internal successors, (3453), 3 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:31,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:31,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1150 of 1456 [2022-11-18 18:38:31,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:33,926 INFO L130 PetriNetUnfolder]: 0/2012 cut-off events. [2022-11-18 18:38:33,927 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-18 18:38:33,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2439 conditions, 2012 events. 0/2012 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7042 event pairs, 0 based on Foata normal form. 0/1970 useless extension candidates. Maximal degree in co-relation 0. Up to 252 conditions per place. [2022-11-18 18:38:33,932 INFO L137 encePairwiseOnDemand]: 1453/1456 looper letters, 51 selfloop transitions, 2 changer transitions 0/1192 dead transitions. [2022-11-18 18:38:33,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1276 places, 1192 transitions, 2700 flow [2022-11-18 18:38:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:38:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:38:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3504 transitions. [2022-11-18 18:38:33,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8021978021978022 [2022-11-18 18:38:33,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3504 transitions. [2022-11-18 18:38:33,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3504 transitions. [2022-11-18 18:38:33,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:33,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3504 transitions. [2022-11-18 18:38:33,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1168.0) internal successors, (3504), 3 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:33,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1456.0) internal successors, (5824), 4 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:33,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1456.0) internal successors, (5824), 4 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:33,941 INFO L175 Difference]: Start difference. First operand has 1285 places, 1188 transitions, 2586 flow. Second operand 3 states and 3504 transitions. [2022-11-18 18:38:33,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1276 places, 1192 transitions, 2700 flow [2022-11-18 18:38:33,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1276 places, 1192 transitions, 2700 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:38:33,954 INFO L231 Difference]: Finished difference. Result has 1277 places, 1189 transitions, 2598 flow [2022-11-18 18:38:33,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=2586, PETRI_DIFFERENCE_MINUEND_PLACES=1274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2598, PETRI_PLACES=1277, PETRI_TRANSITIONS=1189} [2022-11-18 18:38:33,955 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, -8 predicate places. [2022-11-18 18:38:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 1277 places, 1189 transitions, 2598 flow [2022-11-18 18:38:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1151.0) internal successors, (3453), 3 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:33,955 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:33,955 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:33,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2022-11-18 18:38:33,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1611599633, now seen corresponding path program 1 times [2022-11-18 18:38:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:33,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733329151] [2022-11-18 18:38:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:33,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:34,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:34,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733329151] [2022-11-18 18:38:34,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733329151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:34,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353368714] [2022-11-18 18:38:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:34,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:34,020 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:34,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-11-18 18:38:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:35,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:38:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:35,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:35,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353368714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:35,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:35,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:38:35,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982949354] [2022-11-18 18:38:35,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:35,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:38:35,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:35,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:38:35,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:38:35,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1149 out of 1456 [2022-11-18 18:38:35,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1277 places, 1189 transitions, 2598 flow. Second operand has 10 states, 10 states have (on average 1151.3) internal successors, (11513), 10 states have internal predecessors, (11513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:35,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:35,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1149 of 1456 [2022-11-18 18:38:35,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:38,407 INFO L130 PetriNetUnfolder]: 0/1990 cut-off events. [2022-11-18 18:38:38,407 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-18 18:38:38,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 1990 events. 0/1990 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6910 event pairs, 0 based on Foata normal form. 2/1992 useless extension candidates. Maximal degree in co-relation 0. Up to 163 conditions per place. [2022-11-18 18:38:38,412 INFO L137 encePairwiseOnDemand]: 1450/1456 looper letters, 52 selfloop transitions, 9 changer transitions 0/1199 dead transitions. [2022-11-18 18:38:38,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1285 places, 1199 transitions, 2742 flow [2022-11-18 18:38:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:38:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:38:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10404 transitions. [2022-11-18 18:38:38,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7939560439560439 [2022-11-18 18:38:38,419 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 10404 transitions. [2022-11-18 18:38:38,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10404 transitions. [2022-11-18 18:38:38,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:38,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 10404 transitions. [2022-11-18 18:38:38,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1156.0) internal successors, (10404), 9 states have internal predecessors, (10404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:38,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1456.0) internal successors, (14560), 10 states have internal predecessors, (14560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:38,436 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1456.0) internal successors, (14560), 10 states have internal predecessors, (14560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:38,436 INFO L175 Difference]: Start difference. First operand has 1277 places, 1189 transitions, 2598 flow. Second operand 9 states and 10404 transitions. [2022-11-18 18:38:38,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1285 places, 1199 transitions, 2742 flow [2022-11-18 18:38:38,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1284 places, 1199 transitions, 2740 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:38:38,449 INFO L231 Difference]: Finished difference. Result has 1287 places, 1195 transitions, 2646 flow [2022-11-18 18:38:38,450 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=1276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2646, PETRI_PLACES=1287, PETRI_TRANSITIONS=1195} [2022-11-18 18:38:38,450 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, 2 predicate places. [2022-11-18 18:38:38,450 INFO L495 AbstractCegarLoop]: Abstraction has has 1287 places, 1195 transitions, 2646 flow [2022-11-18 18:38:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1151.3) internal successors, (11513), 10 states have internal predecessors, (11513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:38,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:38,452 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:38,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-11-18 18:38:38,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:38,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:38,653 INFO L85 PathProgramCache]: Analyzing trace with hash -336185510, now seen corresponding path program 1 times [2022-11-18 18:38:38,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:38,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933811751] [2022-11-18 18:38:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:38,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:38,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933811751] [2022-11-18 18:38:38,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933811751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146838477] [2022-11-18 18:38:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:38,741 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:38,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-11-18 18:38:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:40,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:38:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:40,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:40,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146838477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:40,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:40,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:38:40,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936063260] [2022-11-18 18:38:40,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:40,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:38:40,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:38:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:38:40,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1149 out of 1456 [2022-11-18 18:38:40,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1287 places, 1195 transitions, 2646 flow. Second operand has 18 states, 18 states have (on average 1151.611111111111) internal successors, (20729), 18 states have internal predecessors, (20729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:40,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:40,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1149 of 1456 [2022-11-18 18:38:40,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:43,336 INFO L130 PetriNetUnfolder]: 0/1946 cut-off events. [2022-11-18 18:38:43,336 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2022-11-18 18:38:43,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2816 conditions, 1946 events. 0/1946 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6617 event pairs, 0 based on Foata normal form. 4/1950 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2022-11-18 18:38:43,342 INFO L137 encePairwiseOnDemand]: 1450/1456 looper letters, 60 selfloop transitions, 21 changer transitions 0/1219 dead transitions. [2022-11-18 18:38:43,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1307 places, 1219 transitions, 2916 flow [2022-11-18 18:38:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:38:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:38:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24214 transitions. [2022-11-18 18:38:43,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7919283097854526 [2022-11-18 18:38:43,356 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 24214 transitions. [2022-11-18 18:38:43,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 24214 transitions. [2022-11-18 18:38:43,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:43,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 24214 transitions. [2022-11-18 18:38:43,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1153.047619047619) internal successors, (24214), 21 states have internal predecessors, (24214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:43,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1456.0) internal successors, (32032), 22 states have internal predecessors, (32032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:43,395 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1456.0) internal successors, (32032), 22 states have internal predecessors, (32032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:43,395 INFO L175 Difference]: Start difference. First operand has 1287 places, 1195 transitions, 2646 flow. Second operand 21 states and 24214 transitions. [2022-11-18 18:38:43,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1307 places, 1219 transitions, 2916 flow [2022-11-18 18:38:43,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1306 places, 1219 transitions, 2902 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:38:43,409 INFO L231 Difference]: Finished difference. Result has 1311 places, 1208 transitions, 2770 flow [2022-11-18 18:38:43,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=1286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2770, PETRI_PLACES=1311, PETRI_TRANSITIONS=1208} [2022-11-18 18:38:43,409 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, 26 predicate places. [2022-11-18 18:38:43,410 INFO L495 AbstractCegarLoop]: Abstraction has has 1311 places, 1208 transitions, 2770 flow [2022-11-18 18:38:43,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1151.611111111111) internal successors, (20729), 18 states have internal predecessors, (20729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:43,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:43,411 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:43,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-11-18 18:38:43,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:43,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash 175376444, now seen corresponding path program 1 times [2022-11-18 18:38:43,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:43,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677382345] [2022-11-18 18:38:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:43,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:43,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677382345] [2022-11-18 18:38:43,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677382345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:43,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479091651] [2022-11-18 18:38:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:43,821 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:43,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-11-18 18:38:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:45,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:38:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:45,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:46,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479091651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:46,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:46,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:38:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690377855] [2022-11-18 18:38:46,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:46,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:38:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:38:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:38:46,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1149 out of 1456 [2022-11-18 18:38:46,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1311 places, 1208 transitions, 2770 flow. Second operand has 34 states, 34 states have (on average 1151.7941176470588) internal successors, (39161), 34 states have internal predecessors, (39161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:46,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:46,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1149 of 1456 [2022-11-18 18:38:46,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:49,299 INFO L130 PetriNetUnfolder]: 0/1858 cut-off events. [2022-11-18 18:38:49,299 INFO L131 PetriNetUnfolder]: For 1005/1005 co-relation queries the response was YES. [2022-11-18 18:38:49,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3014 conditions, 1858 events. 0/1858 cut-off events. For 1005/1005 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6013 event pairs, 0 based on Foata normal form. 8/1866 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-11-18 18:38:49,304 INFO L137 encePairwiseOnDemand]: 1450/1456 looper letters, 76 selfloop transitions, 45 changer transitions 0/1259 dead transitions. [2022-11-18 18:38:49,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1355 places, 1259 transitions, 3328 flow [2022-11-18 18:38:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:38:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:38:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51834 transitions. [2022-11-18 18:38:49,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911172161172161 [2022-11-18 18:38:49,329 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 51834 transitions. [2022-11-18 18:38:49,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 51834 transitions. [2022-11-18 18:38:49,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:49,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 51834 transitions. [2022-11-18 18:38:49,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1151.8666666666666) internal successors, (51834), 45 states have internal predecessors, (51834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:49,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1456.0) internal successors, (66976), 46 states have internal predecessors, (66976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:49,404 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1456.0) internal successors, (66976), 46 states have internal predecessors, (66976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:49,404 INFO L175 Difference]: Start difference. First operand has 1311 places, 1208 transitions, 2770 flow. Second operand 45 states and 51834 transitions. [2022-11-18 18:38:49,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1355 places, 1259 transitions, 3328 flow [2022-11-18 18:38:49,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1349 places, 1259 transitions, 3288 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:38:49,424 INFO L231 Difference]: Finished difference. Result has 1358 places, 1233 transitions, 3048 flow [2022-11-18 18:38:49,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=1305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3048, PETRI_PLACES=1358, PETRI_TRANSITIONS=1233} [2022-11-18 18:38:49,425 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, 73 predicate places. [2022-11-18 18:38:49,425 INFO L495 AbstractCegarLoop]: Abstraction has has 1358 places, 1233 transitions, 3048 flow [2022-11-18 18:38:49,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1151.7941176470588) internal successors, (39161), 34 states have internal predecessors, (39161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:49,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:49,429 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:49,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-11-18 18:38:49,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:49,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:49,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1453907408, now seen corresponding path program 1 times [2022-11-18 18:38:49,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:49,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591369875] [2022-11-18 18:38:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:49,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:50,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591369875] [2022-11-18 18:38:50,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591369875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:50,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367162711] [2022-11-18 18:38:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:50,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:50,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:50,477 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:50,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-11-18 18:38:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:38:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:52,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:53,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367162711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:53,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:53,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:38:53,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089806685] [2022-11-18 18:38:53,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:53,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:38:53,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:38:53,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:38:53,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1149 out of 1456 [2022-11-18 18:38:53,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1358 places, 1233 transitions, 3048 flow. Second operand has 66 states, 66 states have (on average 1151.8939393939395) internal successors, (76025), 66 states have internal predecessors, (76025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:53,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:38:53,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1149 of 1456 [2022-11-18 18:38:53,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:38:58,170 INFO L130 PetriNetUnfolder]: 0/1682 cut-off events. [2022-11-18 18:38:58,170 INFO L131 PetriNetUnfolder]: For 3555/3555 co-relation queries the response was YES. [2022-11-18 18:38:58,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 1682 events. 0/1682 cut-off events. For 3555/3555 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4856 event pairs, 0 based on Foata normal form. 16/1698 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2022-11-18 18:38:58,175 INFO L137 encePairwiseOnDemand]: 1450/1456 looper letters, 108 selfloop transitions, 93 changer transitions 0/1339 dead transitions. [2022-11-18 18:38:58,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1450 places, 1339 transitions, 4298 flow [2022-11-18 18:38:58,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:38:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:38:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107074 transitions. [2022-11-18 18:38:58,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7907509157509157 [2022-11-18 18:38:58,220 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 107074 transitions. [2022-11-18 18:38:58,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 107074 transitions. [2022-11-18 18:38:58,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:38:58,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 107074 transitions. [2022-11-18 18:38:58,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1151.3333333333333) internal successors, (107074), 93 states have internal predecessors, (107074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:58,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1456.0) internal successors, (136864), 94 states have internal predecessors, (136864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:58,371 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1456.0) internal successors, (136864), 94 states have internal predecessors, (136864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:58,371 INFO L175 Difference]: Start difference. First operand has 1358 places, 1233 transitions, 3048 flow. Second operand 93 states and 107074 transitions. [2022-11-18 18:38:58,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1450 places, 1339 transitions, 4298 flow [2022-11-18 18:38:58,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1432 places, 1339 transitions, 4210 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:38:58,405 INFO L231 Difference]: Finished difference. Result has 1449 places, 1282 transitions, 3682 flow [2022-11-18 18:38:58,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=1340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3682, PETRI_PLACES=1449, PETRI_TRANSITIONS=1282} [2022-11-18 18:38:58,406 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, 164 predicate places. [2022-11-18 18:38:58,406 INFO L495 AbstractCegarLoop]: Abstraction has has 1449 places, 1282 transitions, 3682 flow [2022-11-18 18:38:58,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1151.8939393939395) internal successors, (76025), 66 states have internal predecessors, (76025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:58,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:38:58,415 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:58,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:58,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-11-18 18:38:58,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:38:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash -359237928, now seen corresponding path program 1 times [2022-11-18 18:38:58,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:58,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784996423] [2022-11-18 18:38:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:58,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:00,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:00,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784996423] [2022-11-18 18:39:00,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784996423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:00,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79616294] [2022-11-18 18:39:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:00,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:00,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:00,962 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:00,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-11-18 18:39:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:39:02,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:03,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:07,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79616294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:07,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:07,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:39:07,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958618280] [2022-11-18 18:39:07,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:07,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:39:07,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:07,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:39:07,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:39:07,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1149 out of 1456 [2022-11-18 18:39:07,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1449 places, 1282 transitions, 3682 flow. Second operand has 130 states, 130 states have (on average 1151.946153846154) internal successors, (149753), 130 states have internal predecessors, (149753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:07,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:07,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1149 of 1456 [2022-11-18 18:39:07,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:39:13,553 INFO L130 PetriNetUnfolder]: 0/1550 cut-off events. [2022-11-18 18:39:13,553 INFO L131 PetriNetUnfolder]: For 6662/6662 co-relation queries the response was YES. [2022-11-18 18:39:13,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2828 conditions, 1550 events. 0/1550 cut-off events. For 6662/6662 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 4011 event pairs, 0 based on Foata normal form. 12/1562 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2022-11-18 18:39:13,555 INFO L137 encePairwiseOnDemand]: 1451/1456 looper letters, 129 selfloop transitions, 127 changer transitions 0/1384 dead transitions. [2022-11-18 18:39:13,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1566 places, 1384 transitions, 5122 flow [2022-11-18 18:39:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-18 18:39:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2022-11-18 18:39:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148489 transitions. [2022-11-18 18:39:13,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7905752193542891 [2022-11-18 18:39:13,610 INFO L72 ComplementDD]: Start complementDD. Operand 129 states and 148489 transitions. [2022-11-18 18:39:13,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 148489 transitions. [2022-11-18 18:39:13,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:39:13,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 129 states and 148489 transitions. [2022-11-18 18:39:13,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 130 states, 129 states have (on average 1151.077519379845) internal successors, (148489), 129 states have internal predecessors, (148489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:13,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 130 states, 130 states have (on average 1456.0) internal successors, (189280), 130 states have internal predecessors, (189280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:13,822 INFO L81 ComplementDD]: Finished complementDD. Result has 130 states, 130 states have (on average 1456.0) internal successors, (189280), 130 states have internal predecessors, (189280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:13,822 INFO L175 Difference]: Start difference. First operand has 1449 places, 1282 transitions, 3682 flow. Second operand 129 states and 148489 transitions. [2022-11-18 18:39:13,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1566 places, 1384 transitions, 5122 flow [2022-11-18 18:39:13,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1493 places, 1384 transitions, 4690 flow, removed 29 selfloop flow, removed 73 redundant places. [2022-11-18 18:39:13,851 INFO L231 Difference]: Finished difference. Result has 1493 places, 1304 transitions, 3900 flow [2022-11-18 18:39:13,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=1365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=129, PETRI_FLOW=3900, PETRI_PLACES=1493, PETRI_TRANSITIONS=1304} [2022-11-18 18:39:13,852 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, 208 predicate places. [2022-11-18 18:39:13,852 INFO L495 AbstractCegarLoop]: Abstraction has has 1493 places, 1304 transitions, 3900 flow [2022-11-18 18:39:13,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1151.946153846154) internal successors, (149753), 130 states have internal predecessors, (149753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:13,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:13,865 INFO L209 CegarLoopForPetriNet]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:13,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:14,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-11-18 18:39:14,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1907471896, now seen corresponding path program 1 times [2022-11-18 18:39:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:14,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277169545] [2022-11-18 18:39:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:14,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:39:14,148 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:39:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:39:14,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:39:14,283 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:39:14,283 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 18:39:14,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:39:14,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2022-11-18 18:39:14,283 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:14,284 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 18:39:14,284 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2022-11-18 18:39:14,396 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:39:14,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1314 places, 1489 transitions, 4999 flow [2022-11-18 18:39:18,018 INFO L130 PetriNetUnfolder]: 434/3032 cut-off events. [2022-11-18 18:39:18,018 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2022-11-18 18:39:18,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4108 conditions, 3032 events. 434/3032 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 11145 event pairs, 0 based on Foata normal form. 0/2510 useless extension candidates. Maximal degree in co-relation 3965. Up to 88 conditions per place. [2022-11-18 18:39:18,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 1314 places, 1489 transitions, 4999 flow [2022-11-18 18:39:18,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1314 places, 1489 transitions, 4999 flow [2022-11-18 18:39:18,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:39:18,222 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;@3c76908c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:39:18,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:39:18,226 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-18 18:39:18,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:39:18,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:18,226 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:18,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 131375770, now seen corresponding path program 1 times [2022-11-18 18:39:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188188199] [2022-11-18 18:39:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:18,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188188199] [2022-11-18 18:39:18,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188188199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:39:18,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:39:18,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:39:18,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117352700] [2022-11-18 18:39:18,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:39:18,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:39:18,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:39:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:39:18,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1183 out of 1489 [2022-11-18 18:39:18,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1314 places, 1489 transitions, 4999 flow. Second operand has 2 states, 2 states have (on average 1183.5) internal successors, (2367), 2 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:18,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:18,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1183 of 1489 [2022-11-18 18:39:18,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:39:20,801 INFO L130 PetriNetUnfolder]: 0/2554 cut-off events. [2022-11-18 18:39:20,801 INFO L131 PetriNetUnfolder]: For 15093/15093 co-relation queries the response was YES. [2022-11-18 18:39:20,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3674 conditions, 2554 events. 0/2554 cut-off events. For 15093/15093 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 10533 event pairs, 0 based on Foata normal form. 5602/8068 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-11-18 18:39:20,806 INFO L137 encePairwiseOnDemand]: 1227/1489 looper letters, 43 selfloop transitions, 0 changer transitions 11/1226 dead transitions. [2022-11-18 18:39:20,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1314 places, 1226 transitions, 4559 flow [2022-11-18 18:39:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:39:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:39:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2671 transitions. [2022-11-18 18:39:20,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.896910678307589 [2022-11-18 18:39:20,809 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2671 transitions. [2022-11-18 18:39:20,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2671 transitions. [2022-11-18 18:39:20,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:39:20,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2671 transitions. [2022-11-18 18:39:20,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1335.5) internal successors, (2671), 2 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1489.0) internal successors, (4467), 3 states have internal predecessors, (4467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,813 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1489.0) internal successors, (4467), 3 states have internal predecessors, (4467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,813 INFO L175 Difference]: Start difference. First operand has 1314 places, 1489 transitions, 4999 flow. Second operand 2 states and 2671 transitions. [2022-11-18 18:39:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1314 places, 1226 transitions, 4559 flow [2022-11-18 18:39:20,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1314 places, 1226 transitions, 2753 flow, removed 903 selfloop flow, removed 0 redundant places. [2022-11-18 18:39:20,853 INFO L231 Difference]: Finished difference. Result has 1314 places, 1215 transitions, 2645 flow [2022-11-18 18:39:20,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1489, PETRI_DIFFERENCE_MINUEND_FLOW=2667, PETRI_DIFFERENCE_MINUEND_PLACES=1313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2645, PETRI_PLACES=1314, PETRI_TRANSITIONS=1215} [2022-11-18 18:39:20,854 INFO L288 CegarLoopForPetriNet]: 1314 programPoint places, 0 predicate places. [2022-11-18 18:39:20,854 INFO L495 AbstractCegarLoop]: Abstraction has has 1314 places, 1215 transitions, 2645 flow [2022-11-18 18:39:20,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1183.5) internal successors, (2367), 2 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:20,855 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:20,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2022-11-18 18:39:20,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1665575589, now seen corresponding path program 1 times [2022-11-18 18:39:20,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:20,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518433357] [2022-11-18 18:39:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:20,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:20,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:20,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518433357] [2022-11-18 18:39:20,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518433357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:39:20,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:39:20,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:39:20,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933734562] [2022-11-18 18:39:20,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:39:20,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:39:20,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:39:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:39:20,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1176 out of 1489 [2022-11-18 18:39:20,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1314 places, 1215 transitions, 2645 flow. Second operand has 3 states, 3 states have (on average 1177.0) internal successors, (3531), 3 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:20,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1176 of 1489 [2022-11-18 18:39:20,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:39:23,027 INFO L130 PetriNetUnfolder]: 0/2059 cut-off events. [2022-11-18 18:39:23,027 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-18 18:39:23,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 2059 events. 0/2059 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7213 event pairs, 0 based on Foata normal form. 0/2016 useless extension candidates. Maximal degree in co-relation 0. Up to 258 conditions per place. [2022-11-18 18:39:23,031 INFO L137 encePairwiseOnDemand]: 1486/1489 looper letters, 52 selfloop transitions, 2 changer transitions 0/1219 dead transitions. [2022-11-18 18:39:23,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1305 places, 1219 transitions, 2761 flow [2022-11-18 18:39:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:39:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:39:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3583 transitions. [2022-11-18 18:39:23,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8021043205730916 [2022-11-18 18:39:23,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3583 transitions. [2022-11-18 18:39:23,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3583 transitions. [2022-11-18 18:39:23,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:39:23,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3583 transitions. [2022-11-18 18:39:23,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1194.3333333333333) internal successors, (3583), 3 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:23,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1489.0) internal successors, (5956), 4 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:23,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1489.0) internal successors, (5956), 4 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:23,041 INFO L175 Difference]: Start difference. First operand has 1314 places, 1215 transitions, 2645 flow. Second operand 3 states and 3583 transitions. [2022-11-18 18:39:23,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1305 places, 1219 transitions, 2761 flow [2022-11-18 18:39:23,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1305 places, 1219 transitions, 2761 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:39:23,051 INFO L231 Difference]: Finished difference. Result has 1306 places, 1216 transitions, 2657 flow [2022-11-18 18:39:23,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1489, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=1303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2657, PETRI_PLACES=1306, PETRI_TRANSITIONS=1216} [2022-11-18 18:39:23,052 INFO L288 CegarLoopForPetriNet]: 1314 programPoint places, -8 predicate places. [2022-11-18 18:39:23,052 INFO L495 AbstractCegarLoop]: Abstraction has has 1306 places, 1216 transitions, 2657 flow [2022-11-18 18:39:23,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1177.0) internal successors, (3531), 3 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:23,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:23,053 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:23,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2022-11-18 18:39:23,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:23,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1342875025, now seen corresponding path program 1 times [2022-11-18 18:39:23,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144993034] [2022-11-18 18:39:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:23,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:23,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144993034] [2022-11-18 18:39:23,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144993034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:23,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434126037] [2022-11-18 18:39:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:23,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:23,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:23,110 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:23,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-11-18 18:39:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:39:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:25,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:25,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434126037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:25,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:25,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:39:25,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946662195] [2022-11-18 18:39:25,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:25,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:39:25,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:25,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:39:25,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:39:25,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1175 out of 1489 [2022-11-18 18:39:25,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1306 places, 1216 transitions, 2657 flow. Second operand has 10 states, 10 states have (on average 1177.3) internal successors, (11773), 10 states have internal predecessors, (11773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:25,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:25,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1175 of 1489 [2022-11-18 18:39:25,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:39:27,794 INFO L130 PetriNetUnfolder]: 0/2037 cut-off events. [2022-11-18 18:39:27,794 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-18 18:39:27,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2603 conditions, 2037 events. 0/2037 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7083 event pairs, 0 based on Foata normal form. 2/2039 useless extension candidates. Maximal degree in co-relation 0. Up to 167 conditions per place. [2022-11-18 18:39:27,798 INFO L137 encePairwiseOnDemand]: 1483/1489 looper letters, 53 selfloop transitions, 9 changer transitions 0/1226 dead transitions. [2022-11-18 18:39:27,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1314 places, 1226 transitions, 2803 flow [2022-11-18 18:39:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:39:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:39:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10639 transitions. [2022-11-18 18:39:27,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7938959779120961 [2022-11-18 18:39:27,806 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 10639 transitions. [2022-11-18 18:39:27,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10639 transitions. [2022-11-18 18:39:27,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:39:27,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 10639 transitions. [2022-11-18 18:39:27,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1182.111111111111) internal successors, (10639), 9 states have internal predecessors, (10639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:27,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1489.0) internal successors, (14890), 10 states have internal predecessors, (14890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:27,822 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1489.0) internal successors, (14890), 10 states have internal predecessors, (14890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:27,822 INFO L175 Difference]: Start difference. First operand has 1306 places, 1216 transitions, 2657 flow. Second operand 9 states and 10639 transitions. [2022-11-18 18:39:27,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1314 places, 1226 transitions, 2803 flow [2022-11-18 18:39:27,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1313 places, 1226 transitions, 2801 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:39:27,834 INFO L231 Difference]: Finished difference. Result has 1316 places, 1222 transitions, 2705 flow [2022-11-18 18:39:27,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1489, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=1305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2705, PETRI_PLACES=1316, PETRI_TRANSITIONS=1222} [2022-11-18 18:39:27,834 INFO L288 CegarLoopForPetriNet]: 1314 programPoint places, 2 predicate places. [2022-11-18 18:39:27,835 INFO L495 AbstractCegarLoop]: Abstraction has has 1316 places, 1222 transitions, 2705 flow [2022-11-18 18:39:27,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1177.3) internal successors, (11773), 10 states have internal predecessors, (11773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:27,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:27,836 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:27,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:28,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:28,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:28,037 INFO L85 PathProgramCache]: Analyzing trace with hash -231958950, now seen corresponding path program 1 times [2022-11-18 18:39:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:28,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438253521] [2022-11-18 18:39:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:28,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:28,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:28,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438253521] [2022-11-18 18:39:28,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438253521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:28,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790115218] [2022-11-18 18:39:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:28,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:28,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:28,132 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:28,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-11-18 18:39:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:39:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:30,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790115218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:30,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:30,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:39:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433862205] [2022-11-18 18:39:30,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:30,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:39:30,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:39:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:39:30,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1175 out of 1489 [2022-11-18 18:39:30,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1316 places, 1222 transitions, 2705 flow. Second operand has 18 states, 18 states have (on average 1177.611111111111) internal successors, (21197), 18 states have internal predecessors, (21197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:30,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:30,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1175 of 1489 [2022-11-18 18:39:30,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:39:33,039 INFO L130 PetriNetUnfolder]: 0/1993 cut-off events. [2022-11-18 18:39:33,039 INFO L131 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2022-11-18 18:39:33,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2884 conditions, 1993 events. 0/1993 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6791 event pairs, 0 based on Foata normal form. 4/1997 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2022-11-18 18:39:33,044 INFO L137 encePairwiseOnDemand]: 1483/1489 looper letters, 61 selfloop transitions, 21 changer transitions 0/1246 dead transitions. [2022-11-18 18:39:33,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1336 places, 1246 transitions, 2977 flow [2022-11-18 18:39:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:39:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:39:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24761 transitions. [2022-11-18 18:39:33,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7918705427100323 [2022-11-18 18:39:33,057 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 24761 transitions. [2022-11-18 18:39:33,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 24761 transitions. [2022-11-18 18:39:33,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:39:33,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 24761 transitions. [2022-11-18 18:39:33,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1179.095238095238) internal successors, (24761), 21 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:33,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1489.0) internal successors, (32758), 22 states have internal predecessors, (32758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:33,099 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1489.0) internal successors, (32758), 22 states have internal predecessors, (32758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:33,099 INFO L175 Difference]: Start difference. First operand has 1316 places, 1222 transitions, 2705 flow. Second operand 21 states and 24761 transitions. [2022-11-18 18:39:33,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1336 places, 1246 transitions, 2977 flow [2022-11-18 18:39:33,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1335 places, 1246 transitions, 2963 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 18:39:33,112 INFO L231 Difference]: Finished difference. Result has 1340 places, 1235 transitions, 2829 flow [2022-11-18 18:39:33,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1489, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=1315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2829, PETRI_PLACES=1340, PETRI_TRANSITIONS=1235} [2022-11-18 18:39:33,113 INFO L288 CegarLoopForPetriNet]: 1314 programPoint places, 26 predicate places. [2022-11-18 18:39:33,113 INFO L495 AbstractCegarLoop]: Abstraction has has 1340 places, 1235 transitions, 2829 flow [2022-11-18 18:39:33,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1177.611111111111) internal successors, (21197), 18 states have internal predecessors, (21197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:33,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:33,115 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:33,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-11-18 18:39:33,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-11-18 18:39:33,316 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2117669436, now seen corresponding path program 1 times [2022-11-18 18:39:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:33,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624367455] [2022-11-18 18:39:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:33,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:33,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:33,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624367455] [2022-11-18 18:39:33,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624367455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:33,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227420463] [2022-11-18 18:39:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:33,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:33,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:33,545 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:33,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-11-18 18:39:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:35,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:39:35,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:35,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:35,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227420463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:35,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:35,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:39:35,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920795324] [2022-11-18 18:39:35,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:35,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:39:35,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:35,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:39:35,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:39:35,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1175 out of 1489 [2022-11-18 18:39:35,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1340 places, 1235 transitions, 2829 flow. Second operand has 34 states, 34 states have (on average 1177.7941176470588) internal successors, (40045), 34 states have internal predecessors, (40045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:35,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:35,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1175 of 1489 [2022-11-18 18:39:35,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:39:39,460 INFO L130 PetriNetUnfolder]: 0/1905 cut-off events. [2022-11-18 18:39:39,461 INFO L131 PetriNetUnfolder]: For 1032/1032 co-relation queries the response was YES. [2022-11-18 18:39:39,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3091 conditions, 1905 events. 0/1905 cut-off events. For 1032/1032 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6178 event pairs, 0 based on Foata normal form. 8/1913 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-11-18 18:39:39,464 INFO L137 encePairwiseOnDemand]: 1483/1489 looper letters, 77 selfloop transitions, 45 changer transitions 0/1286 dead transitions. [2022-11-18 18:39:39,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1384 places, 1286 transitions, 3389 flow [2022-11-18 18:39:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:39:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:39:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53005 transitions. [2022-11-18 18:39:39,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7910603686292068 [2022-11-18 18:39:39,490 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 53005 transitions. [2022-11-18 18:39:39,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 53005 transitions. [2022-11-18 18:39:39,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:39:39,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 53005 transitions. [2022-11-18 18:39:39,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1177.888888888889) internal successors, (53005), 45 states have internal predecessors, (53005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:39,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1489.0) internal successors, (68494), 46 states have internal predecessors, (68494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:39,572 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1489.0) internal successors, (68494), 46 states have internal predecessors, (68494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:39,572 INFO L175 Difference]: Start difference. First operand has 1340 places, 1235 transitions, 2829 flow. Second operand 45 states and 53005 transitions. [2022-11-18 18:39:39,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1384 places, 1286 transitions, 3389 flow [2022-11-18 18:39:39,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1378 places, 1286 transitions, 3349 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:39:39,591 INFO L231 Difference]: Finished difference. Result has 1387 places, 1260 transitions, 3107 flow [2022-11-18 18:39:39,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1489, PETRI_DIFFERENCE_MINUEND_FLOW=2805, PETRI_DIFFERENCE_MINUEND_PLACES=1334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3107, PETRI_PLACES=1387, PETRI_TRANSITIONS=1260} [2022-11-18 18:39:39,592 INFO L288 CegarLoopForPetriNet]: 1314 programPoint places, 73 predicate places. [2022-11-18 18:39:39,592 INFO L495 AbstractCegarLoop]: Abstraction has has 1387 places, 1260 transitions, 3107 flow [2022-11-18 18:39:39,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1177.7941176470588) internal successors, (40045), 34 states have internal predecessors, (40045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:39,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:39,596 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:39,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-11-18 18:39:39,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:39,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:39,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1889238480, now seen corresponding path program 1 times [2022-11-18 18:39:39,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:39,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555500595] [2022-11-18 18:39:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:39,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:40,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555500595] [2022-11-18 18:39:40,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555500595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651068938] [2022-11-18 18:39:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:40,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:40,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:40,477 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:40,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-11-18 18:39:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:39:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:42,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:43,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651068938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:43,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:43,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-18 18:39:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548551520] [2022-11-18 18:39:43,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 18:39:43,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 18:39:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 18:39:43,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1175 out of 1489 [2022-11-18 18:39:43,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1387 places, 1260 transitions, 3107 flow. Second operand has 66 states, 66 states have (on average 1177.8939393939395) internal successors, (77741), 66 states have internal predecessors, (77741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:43,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:43,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1175 of 1489 [2022-11-18 18:39:43,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:39:48,355 INFO L130 PetriNetUnfolder]: 0/1729 cut-off events. [2022-11-18 18:39:48,355 INFO L131 PetriNetUnfolder]: For 3676/3676 co-relation queries the response was YES. [2022-11-18 18:39:48,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3085 conditions, 1729 events. 0/1729 cut-off events. For 3676/3676 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5026 event pairs, 0 based on Foata normal form. 16/1745 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2022-11-18 18:39:48,359 INFO L137 encePairwiseOnDemand]: 1483/1489 looper letters, 109 selfloop transitions, 93 changer transitions 0/1366 dead transitions. [2022-11-18 18:39:48,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1479 places, 1366 transitions, 4359 flow [2022-11-18 18:39:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 18:39:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 18:39:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109493 transitions. [2022-11-18 18:39:48,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7906944835604469 [2022-11-18 18:39:48,418 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 109493 transitions. [2022-11-18 18:39:48,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 109493 transitions. [2022-11-18 18:39:48,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:39:48,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 109493 transitions. [2022-11-18 18:39:48,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1177.3440860215053) internal successors, (109493), 93 states have internal predecessors, (109493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:48,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1489.0) internal successors, (139966), 94 states have internal predecessors, (139966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:48,580 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1489.0) internal successors, (139966), 94 states have internal predecessors, (139966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:48,580 INFO L175 Difference]: Start difference. First operand has 1387 places, 1260 transitions, 3107 flow. Second operand 93 states and 109493 transitions. [2022-11-18 18:39:48,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1479 places, 1366 transitions, 4359 flow [2022-11-18 18:39:48,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1461 places, 1366 transitions, 4271 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-18 18:39:48,621 INFO L231 Difference]: Finished difference. Result has 1478 places, 1309 transitions, 3741 flow [2022-11-18 18:39:48,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1489, PETRI_DIFFERENCE_MINUEND_FLOW=3051, PETRI_DIFFERENCE_MINUEND_PLACES=1369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3741, PETRI_PLACES=1478, PETRI_TRANSITIONS=1309} [2022-11-18 18:39:48,622 INFO L288 CegarLoopForPetriNet]: 1314 programPoint places, 164 predicate places. [2022-11-18 18:39:48,622 INFO L495 AbstractCegarLoop]: Abstraction has has 1478 places, 1309 transitions, 3741 flow [2022-11-18 18:39:48,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1177.8939393939395) internal successors, (77741), 66 states have internal predecessors, (77741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:48,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:39:48,632 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:48,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:48,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:48,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 18:39:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash 635470552, now seen corresponding path program 1 times [2022-11-18 18:39:48,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:48,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878002400] [2022-11-18 18:39:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:48,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:51,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:51,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878002400] [2022-11-18 18:39:51,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878002400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006527797] [2022-11-18 18:39:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:51,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:51,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:51,187 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:51,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30080d6e-193d-4f8a-a3a4-61ccbaa81783/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-11-18 18:39:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:53,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 18:39:53,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:53,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:57,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006527797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:57,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:57,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-18 18:39:57,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859517093] [2022-11-18 18:39:57,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:57,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-18 18:39:57,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:57,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-18 18:39:57,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 18:39:57,419 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1175 out of 1489 [2022-11-18 18:39:57,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1478 places, 1309 transitions, 3741 flow. Second operand has 130 states, 130 states have (on average 1177.946153846154) internal successors, (153133), 130 states have internal predecessors, (153133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:57,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:39:57,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1175 of 1489 [2022-11-18 18:39:57,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand