./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF --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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:32:05,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:32:05,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:32:05,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:32:05,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:32:05,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:32:05,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:32:05,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:32:05,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:32:05,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:32:05,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:32:05,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:32:05,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:32:05,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:32:05,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:32:05,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:32:05,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:32:05,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:32:05,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:32:05,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:32:05,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:32:05,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:32:05,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:32:05,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:32:05,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:32:05,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:32:05,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:32:05,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:32:05,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:32:05,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:32:05,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:32:05,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:32:05,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:32:05,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:32:05,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:32:05,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:32:05,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:32:05,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:32:05,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:32:05,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:32:06,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:32:06,001 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:32:06,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:32:06,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:32:06,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:32:06,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:32:06,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:32:06,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:32:06,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:32:06,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:32:06,055 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:32:06,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:32:06,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:32:06,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:32:06,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:32:06,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:32:06,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:32:06,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:32:06,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:32:06,058 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:32:06,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:32:06,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:32:06,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:32:06,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:32:06,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:32:06,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:32:06,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:06,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:32:06,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:32:06,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:32:06,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:32:06,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:32:06,062 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:32:06,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:32:06,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:32:06,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:32:06,064 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_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2021-11-20 05:32:06,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:32:06,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:32:06,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:32:06,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:32:06,463 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:32:06,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-11-20 05:32:06,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/data/979f4a4ad/44d0cc8dc2004f91a539744a93e69264/FLAG1dc6982aa [2021-11-20 05:32:07,051 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:32:07,053 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-11-20 05:32:07,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/data/979f4a4ad/44d0cc8dc2004f91a539744a93e69264/FLAG1dc6982aa [2021-11-20 05:32:07,405 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/data/979f4a4ad/44d0cc8dc2004f91a539744a93e69264 [2021-11-20 05:32:07,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:32:07,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:32:07,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:07,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:32:07,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:32:07,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d1ad994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07, skipping insertion in model container [2021-11-20 05:32:07,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:32:07,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:32:07,655 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2021-11-20 05:32:07,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:07,664 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:32:07,682 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2021-11-20 05:32:07,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:07,697 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:32:07,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07 WrapperNode [2021-11-20 05:32:07,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:07,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:07,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:32:07,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:32:07,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,730 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2021-11-20 05:32:07,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:07,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:32:07,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:32:07,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:32:07,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:32:07,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:32:07,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:32:07,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:32:07,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:07,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:07,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:32:07,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:32:07,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:32:07,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 05:32:07,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 05:32:07,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 05:32:07,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 05:32:07,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:32:07,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:32:07,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:32:07,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:32:07,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:32:07,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:32:07,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:32:07,847 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 05:32:07,978 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:32:07,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:32:08,269 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:32:08,277 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:32:08,292 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 05:32:08,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:08 BoogieIcfgContainer [2021-11-20 05:32:08,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:32:08,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:32:08,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:32:08,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:32:08,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:32:07" (1/3) ... [2021-11-20 05:32:08,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69dafed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:08, skipping insertion in model container [2021-11-20 05:32:08,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07" (2/3) ... [2021-11-20 05:32:08,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69dafed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:08, skipping insertion in model container [2021-11-20 05:32:08,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:08" (3/3) ... [2021-11-20 05:32:08,303 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2021-11-20 05:32:08,308 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 05:32:08,308 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:32:08,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:32:08,308 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 05:32:08,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,334 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,334 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,334 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,334 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,335 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,335 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,335 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,335 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,340 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,341 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,341 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,344 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,344 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,345 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 05:32:08,348 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 05:32:08,397 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:32:08,404 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:32:08,405 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 05:32:08,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2021-11-20 05:32:08,460 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2021-11-20 05:32:08,460 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 05:32:08,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2021-11-20 05:32:08,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2021-11-20 05:32:08,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2021-11-20 05:32:08,510 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2021-11-20 05:32:08,510 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 05:32:08,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:08,511 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:08,511 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1675015954, now seen corresponding path program 1 times [2021-11-20 05:32:08,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:08,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319239984] [2021-11-20 05:32:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:08,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:08,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319239984] [2021-11-20 05:32:08,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319239984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:08,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:08,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:32:08,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798734310] [2021-11-20 05:32:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:08,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:32:08,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:32:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:32:08,833 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2021-11-20 05:32:08,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:08,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:08,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2021-11-20 05:32:08,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:08,901 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2021-11-20 05:32:08,901 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-11-20 05:32:08,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2021-11-20 05:32:08,903 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2021-11-20 05:32:08,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2021-11-20 05:32:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:32:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 05:32:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2021-11-20 05:32:08,921 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2021-11-20 05:32:08,922 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2021-11-20 05:32:08,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2021-11-20 05:32:08,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:08,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2021-11-20 05:32:08,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:08,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 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) [2021-11-20 05:32:08,935 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 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) [2021-11-20 05:32:08,938 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2021-11-20 05:32:08,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2021-11-20 05:32:08,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 05:32:08,951 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2021-11-20 05:32:08,953 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2021-11-20 05:32:08,957 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2021-11-20 05:32:08,958 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2021-11-20 05:32:08,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:08,958 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:08,958 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:08,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:32:08,959 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash 845260518, now seen corresponding path program 1 times [2021-11-20 05:32:08,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:08,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326966059] [2021-11-20 05:32:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:08,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:09,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:09,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326966059] [2021-11-20 05:32:09,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326966059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:09,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:09,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:32:09,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409322673] [2021-11-20 05:32:09,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:09,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:32:09,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:09,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:32:09,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:09,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-11-20 05:32:09,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:09,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:09,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-11-20 05:32:09,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:09,396 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2021-11-20 05:32:09,397 INFO L130 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2021-11-20 05:32:09,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 212 events. 62/212 cut-off events. For 11/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 30 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 352. Up to 85 conditions per place. [2021-11-20 05:32:09,400 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2021-11-20 05:32:09,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2021-11-20 05:32:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:32:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 05:32:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2021-11-20 05:32:09,406 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2021-11-20 05:32:09,406 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2021-11-20 05:32:09,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2021-11-20 05:32:09,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:09,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2021-11-20 05:32:09,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:09,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:09,416 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:09,416 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2021-11-20 05:32:09,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2021-11-20 05:32:09,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 05:32:09,420 INFO L242 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2021-11-20 05:32:09,421 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2021-11-20 05:32:09,422 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2021-11-20 05:32:09,422 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2021-11-20 05:32:09,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:09,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:09,423 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:32:09,423 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1873293087, now seen corresponding path program 1 times [2021-11-20 05:32:09,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:09,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134647050] [2021-11-20 05:32:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:09,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:09,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:09,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134647050] [2021-11-20 05:32:09,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134647050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:09,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879581248] [2021-11-20 05:32:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:09,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:09,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:09,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:09,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:32:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:09,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:32:09,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:10,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:10,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879581248] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:10,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:32:10,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 8] total 15 [2021-11-20 05:32:10,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869927693] [2021-11-20 05:32:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:10,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:10,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:10,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:10,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:32:10,562 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-11-20 05:32:10,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 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) [2021-11-20 05:32:10,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:10,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-11-20 05:32:10,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:10,724 INFO L129 PetriNetUnfolder]: 62/253 cut-off events. [2021-11-20 05:32:10,724 INFO L130 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2021-11-20 05:32:10,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 253 events. 62/253 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 977 event pairs, 22 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 459. Up to 89 conditions per place. [2021-11-20 05:32:10,732 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2021-11-20 05:32:10,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2021-11-20 05:32:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:32:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 05:32:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2021-11-20 05:32:10,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2021-11-20 05:32:10,739 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2021-11-20 05:32:10,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2021-11-20 05:32:10,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:10,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2021-11-20 05:32:10,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:10,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:10,747 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:10,747 INFO L186 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2021-11-20 05:32:10,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2021-11-20 05:32:10,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-11-20 05:32:10,755 INFO L242 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2021-11-20 05:32:10,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2021-11-20 05:32:10,758 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2021-11-20 05:32:10,758 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2021-11-20 05:32:10,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 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) [2021-11-20 05:32:10,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:10,759 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:10,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:10,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:10,973 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2021-11-20 05:32:10,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:10,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561693052] [2021-11-20 05:32:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:10,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:11,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:11,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561693052] [2021-11-20 05:32:11,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561693052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:11,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:11,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:32:11,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833806554] [2021-11-20 05:32:11,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:11,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:11,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:11,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:11,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:11,102 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-11-20 05:32:11,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 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) [2021-11-20 05:32:11,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:11,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-11-20 05:32:11,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:11,237 INFO L129 PetriNetUnfolder]: 63/250 cut-off events. [2021-11-20 05:32:11,237 INFO L130 PetriNetUnfolder]: For 153/167 co-relation queries the response was YES. [2021-11-20 05:32:11,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 250 events. 63/250 cut-off events. For 153/167 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 991 event pairs, 13 based on Foata normal form. 5/252 useless extension candidates. Maximal degree in co-relation 539. Up to 56 conditions per place. [2021-11-20 05:32:11,242 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 36 selfloop transitions, 13 changer transitions 4/96 dead transitions. [2021-11-20 05:32:11,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 96 transitions, 413 flow [2021-11-20 05:32:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:32:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 05:32:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 418 transitions. [2021-11-20 05:32:11,245 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7108843537414966 [2021-11-20 05:32:11,245 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 418 transitions. [2021-11-20 05:32:11,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 418 transitions. [2021-11-20 05:32:11,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:11,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 418 transitions. [2021-11-20 05:32:11,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.714285714285715) internal successors, (418), 7 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,250 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,251 INFO L186 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 7 states and 418 transitions. [2021-11-20 05:32:11,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 96 transitions, 413 flow [2021-11-20 05:32:11,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 96 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-20 05:32:11,260 INFO L242 Difference]: Finished difference. Result has 86 places, 79 transitions, 297 flow [2021-11-20 05:32:11,261 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2021-11-20 05:32:11,262 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2021-11-20 05:32:11,263 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 297 flow [2021-11-20 05:32:11,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 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) [2021-11-20 05:32:11,263 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:11,264 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:11,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:32:11,264 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1568045031, now seen corresponding path program 1 times [2021-11-20 05:32:11,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:11,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012537303] [2021-11-20 05:32:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:11,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:11,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012537303] [2021-11-20 05:32:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012537303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:11,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:11,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:32:11,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888685112] [2021-11-20 05:32:11,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:11,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:11,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:11,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-11-20 05:32:11,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 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) [2021-11-20 05:32:11,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:11,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-11-20 05:32:11,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:11,514 INFO L129 PetriNetUnfolder]: 60/261 cut-off events. [2021-11-20 05:32:11,514 INFO L130 PetriNetUnfolder]: For 418/428 co-relation queries the response was YES. [2021-11-20 05:32:11,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 261 events. 60/261 cut-off events. For 418/428 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1054 event pairs, 11 based on Foata normal form. 8/263 useless extension candidates. Maximal degree in co-relation 650. Up to 64 conditions per place. [2021-11-20 05:32:11,519 INFO L132 encePairwiseOnDemand]: 73/84 looper letters, 46 selfloop transitions, 14 changer transitions 2/105 dead transitions. [2021-11-20 05:32:11,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 105 transitions, 537 flow [2021-11-20 05:32:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:32:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 05:32:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 424 transitions. [2021-11-20 05:32:11,522 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7210884353741497 [2021-11-20 05:32:11,522 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 424 transitions. [2021-11-20 05:32:11,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 424 transitions. [2021-11-20 05:32:11,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:11,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 424 transitions. [2021-11-20 05:32:11,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.57142857142857) internal successors, (424), 7 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,527 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,527 INFO L186 Difference]: Start difference. First operand has 86 places, 79 transitions, 297 flow. Second operand 7 states and 424 transitions. [2021-11-20 05:32:11,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 105 transitions, 537 flow [2021-11-20 05:32:11,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 105 transitions, 531 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-11-20 05:32:11,543 INFO L242 Difference]: Finished difference. Result has 93 places, 82 transitions, 366 flow [2021-11-20 05:32:11,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2021-11-20 05:32:11,546 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2021-11-20 05:32:11,546 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 366 flow [2021-11-20 05:32:11,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 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) [2021-11-20 05:32:11,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:11,547 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:11,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:32:11,548 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash -746561301, now seen corresponding path program 2 times [2021-11-20 05:32:11,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:11,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640456467] [2021-11-20 05:32:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:11,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:11,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:11,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640456467] [2021-11-20 05:32:11,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640456467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:11,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:11,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:32:11,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399127324] [2021-11-20 05:32:11,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:11,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:11,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:11,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:11,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:11,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-11-20 05:32:11,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 366 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 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) [2021-11-20 05:32:11,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:11,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-11-20 05:32:11,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:11,801 INFO L129 PetriNetUnfolder]: 52/224 cut-off events. [2021-11-20 05:32:11,802 INFO L130 PetriNetUnfolder]: For 523/532 co-relation queries the response was YES. [2021-11-20 05:32:11,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 224 events. 52/224 cut-off events. For 523/532 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 777 event pairs, 17 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 630. Up to 75 conditions per place. [2021-11-20 05:32:11,806 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 39 selfloop transitions, 11 changer transitions 5/98 dead transitions. [2021-11-20 05:32:11,807 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 546 flow [2021-11-20 05:32:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:32:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-20 05:32:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 415 transitions. [2021-11-20 05:32:11,811 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.70578231292517 [2021-11-20 05:32:11,811 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 415 transitions. [2021-11-20 05:32:11,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 415 transitions. [2021-11-20 05:32:11,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:11,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 415 transitions. [2021-11-20 05:32:11,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.285714285714285) internal successors, (415), 7 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,816 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,816 INFO L186 Difference]: Start difference. First operand has 93 places, 82 transitions, 366 flow. Second operand 7 states and 415 transitions. [2021-11-20 05:32:11,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 546 flow [2021-11-20 05:32:11,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 535 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-20 05:32:11,826 INFO L242 Difference]: Finished difference. Result has 98 places, 84 transitions, 403 flow [2021-11-20 05:32:11,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=403, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2021-11-20 05:32:11,829 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2021-11-20 05:32:11,830 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 403 flow [2021-11-20 05:32:11,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 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) [2021-11-20 05:32:11,831 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:11,831 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:11,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:32:11,831 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:11,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2086895390, now seen corresponding path program 1 times [2021-11-20 05:32:11,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:11,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101567826] [2021-11-20 05:32:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:11,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:12,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:12,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101567826] [2021-11-20 05:32:12,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101567826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921169811] [2021-11-20 05:32:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:12,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:12,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:12,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:12,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:32:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:32:12,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:12,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:12,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921169811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:12,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:12,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 16 [2021-11-20 05:32:12,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130433186] [2021-11-20 05:32:12,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:12,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:32:12,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:32:12,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:32:12,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:12,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 84 transitions, 403 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:12,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:12,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:12,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:12,793 INFO L129 PetriNetUnfolder]: 86/305 cut-off events. [2021-11-20 05:32:12,793 INFO L130 PetriNetUnfolder]: For 839/839 co-relation queries the response was YES. [2021-11-20 05:32:12,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 305 events. 86/305 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1259 event pairs, 5 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 948. Up to 56 conditions per place. [2021-11-20 05:32:12,798 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 50 selfloop transitions, 40 changer transitions 14/145 dead transitions. [2021-11-20 05:32:12,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1005 flow [2021-11-20 05:32:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:32:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-20 05:32:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 948 transitions. [2021-11-20 05:32:12,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6638655462184874 [2021-11-20 05:32:12,803 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 948 transitions. [2021-11-20 05:32:12,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 948 transitions. [2021-11-20 05:32:12,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:12,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 948 transitions. [2021-11-20 05:32:12,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:12,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 84.0) internal successors, (1512), 18 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:12,812 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 84.0) internal successors, (1512), 18 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:12,813 INFO L186 Difference]: Start difference. First operand has 98 places, 84 transitions, 403 flow. Second operand 17 states and 948 transitions. [2021-11-20 05:32:12,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1005 flow [2021-11-20 05:32:12,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 145 transitions, 963 flow, removed 11 selfloop flow, removed 4 redundant places. [2021-11-20 05:32:12,823 INFO L242 Difference]: Finished difference. Result has 121 places, 104 transitions, 695 flow [2021-11-20 05:32:12,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=695, PETRI_PLACES=121, PETRI_TRANSITIONS=104} [2021-11-20 05:32:12,824 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 47 predicate places. [2021-11-20 05:32:12,824 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 104 transitions, 695 flow [2021-11-20 05:32:12,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:12,825 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:12,825 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:12,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:13,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:32:13,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:13,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:13,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2043864392, now seen corresponding path program 2 times [2021-11-20 05:32:13,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:13,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155519402] [2021-11-20 05:32:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:13,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:13,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:13,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155519402] [2021-11-20 05:32:13,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155519402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:13,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167953815] [2021-11-20 05:32:13,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:32:13,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:13,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:13,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:13,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:32:13,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:32:13,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:32:13,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:13,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:14,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167953815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:14,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:14,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-11-20 05:32:14,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918226700] [2021-11-20 05:32:14,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:14,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:32:14,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:32:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:32:14,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:14,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 104 transitions, 695 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:14,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:14,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:15,769 INFO L129 PetriNetUnfolder]: 177/549 cut-off events. [2021-11-20 05:32:15,770 INFO L130 PetriNetUnfolder]: For 3225/3225 co-relation queries the response was YES. [2021-11-20 05:32:15,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 549 events. 177/549 cut-off events. For 3225/3225 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2941 event pairs, 3 based on Foata normal form. 23/571 useless extension candidates. Maximal degree in co-relation 2254. Up to 83 conditions per place. [2021-11-20 05:32:15,778 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 87 selfloop transitions, 106 changer transitions 41/275 dead transitions. [2021-11-20 05:32:15,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 275 transitions, 2739 flow [2021-11-20 05:32:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 05:32:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-11-20 05:32:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2021-11-20 05:32:15,788 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2021-11-20 05:32:15,789 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2021-11-20 05:32:15,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2021-11-20 05:32:15,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:15,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2021-11-20 05:32:15,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.869565217391305) internal successors, (2524), 46 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) [2021-11-20 05:32:15,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:15,812 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:15,812 INFO L186 Difference]: Start difference. First operand has 121 places, 104 transitions, 695 flow. Second operand 46 states and 2524 transitions. [2021-11-20 05:32:15,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 275 transitions, 2739 flow [2021-11-20 05:32:15,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 275 transitions, 2409 flow, removed 117 selfloop flow, removed 9 redundant places. [2021-11-20 05:32:15,838 INFO L242 Difference]: Finished difference. Result has 168 places, 193 transitions, 1760 flow [2021-11-20 05:32:15,838 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1760, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2021-11-20 05:32:15,839 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 94 predicate places. [2021-11-20 05:32:15,839 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 1760 flow [2021-11-20 05:32:15,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:15,840 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:15,841 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:15,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:16,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 05:32:16,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1844806516, now seen corresponding path program 3 times [2021-11-20 05:32:16,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:16,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095268974] [2021-11-20 05:32:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:16,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:16,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095268974] [2021-11-20 05:32:16,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095268974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651538841] [2021-11-20 05:32:16,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:32:16,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:16,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:16,225 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:16,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:32:16,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:32:16,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:16,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:32:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:16,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:17,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651538841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:17,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:17,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-11-20 05:32:17,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988334297] [2021-11-20 05:32:17,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:17,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:32:17,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:32:17,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:32:17,044 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:17,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 1760 flow. Second operand has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:17,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:17,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:17,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:19,165 INFO L129 PetriNetUnfolder]: 355/1039 cut-off events. [2021-11-20 05:32:19,166 INFO L130 PetriNetUnfolder]: For 7568/7568 co-relation queries the response was YES. [2021-11-20 05:32:19,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 1039 events. 355/1039 cut-off events. For 7568/7568 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6479 event pairs, 4 based on Foata normal form. 18/1054 useless extension candidates. Maximal degree in co-relation 5253. Up to 171 conditions per place. [2021-11-20 05:32:19,187 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 165 selfloop transitions, 375 changer transitions 17/598 dead transitions. [2021-11-20 05:32:19,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 598 transitions, 7117 flow [2021-11-20 05:32:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-20 05:32:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-11-20 05:32:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3291 transitions. [2021-11-20 05:32:19,196 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6529761904761905 [2021-11-20 05:32:19,196 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3291 transitions. [2021-11-20 05:32:19,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3291 transitions. [2021-11-20 05:32:19,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:19,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3291 transitions. [2021-11-20 05:32:19,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 54.85) internal successors, (3291), 60 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:19,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:19,221 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:19,221 INFO L186 Difference]: Start difference. First operand has 168 places, 193 transitions, 1760 flow. Second operand 60 states and 3291 transitions. [2021-11-20 05:32:19,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 598 transitions, 7117 flow [2021-11-20 05:32:19,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 598 transitions, 6217 flow, removed 399 selfloop flow, removed 16 redundant places. [2021-11-20 05:32:19,331 INFO L242 Difference]: Finished difference. Result has 225 places, 518 transitions, 5889 flow [2021-11-20 05:32:19,332 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=5889, PETRI_PLACES=225, PETRI_TRANSITIONS=518} [2021-11-20 05:32:19,332 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 151 predicate places. [2021-11-20 05:32:19,332 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 518 transitions, 5889 flow [2021-11-20 05:32:19,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:19,333 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:19,334 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:19,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:19,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:19,534 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1747249742, now seen corresponding path program 4 times [2021-11-20 05:32:19,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104434370] [2021-11-20 05:32:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:19,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:19,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104434370] [2021-11-20 05:32:19,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104434370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:19,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281044213] [2021-11-20 05:32:19,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:32:19,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:19,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:19,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:19,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:32:19,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:32:19,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:32:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:20,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:20,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281044213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:20,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:20,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-11-20 05:32:20,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555385571] [2021-11-20 05:32:20,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:20,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:32:20,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:32:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:32:20,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:20,517 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 518 transitions, 5889 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:20,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:20,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:22,605 INFO L129 PetriNetUnfolder]: 752/2067 cut-off events. [2021-11-20 05:32:22,605 INFO L130 PetriNetUnfolder]: For 18117/18117 co-relation queries the response was YES. [2021-11-20 05:32:22,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12451 conditions, 2067 events. 752/2067 cut-off events. For 18117/18117 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15269 event pairs, 8 based on Foata normal form. 35/2098 useless extension candidates. Maximal degree in co-relation 12397. Up to 340 conditions per place. [2021-11-20 05:32:22,652 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 315 selfloop transitions, 844 changer transitions 12/1212 dead transitions. [2021-11-20 05:32:22,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1212 transitions, 17024 flow [2021-11-20 05:32:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 05:32:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-11-20 05:32:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2021-11-20 05:32:22,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2021-11-20 05:32:22,720 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2021-11-20 05:32:22,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2021-11-20 05:32:22,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:22,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2021-11-20 05:32:22,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.326530612244895) internal successors, (2711), 49 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:22,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:22,745 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:22,745 INFO L186 Difference]: Start difference. First operand has 225 places, 518 transitions, 5889 flow. Second operand 49 states and 2711 transitions. [2021-11-20 05:32:22,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1212 transitions, 17024 flow [2021-11-20 05:32:23,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 1212 transitions, 16079 flow, removed 458 selfloop flow, removed 7 redundant places. [2021-11-20 05:32:23,076 INFO L242 Difference]: Finished difference. Result has 286 places, 1063 transitions, 15137 flow [2021-11-20 05:32:23,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=15137, PETRI_PLACES=286, PETRI_TRANSITIONS=1063} [2021-11-20 05:32:23,079 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 212 predicate places. [2021-11-20 05:32:23,079 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 1063 transitions, 15137 flow [2021-11-20 05:32:23,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:23,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:23,080 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:23,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:23,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:32:23,308 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:23,309 INFO L85 PathProgramCache]: Analyzing trace with hash 657866194, now seen corresponding path program 5 times [2021-11-20 05:32:23,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:23,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254853960] [2021-11-20 05:32:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:23,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:23,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254853960] [2021-11-20 05:32:23,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254853960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157238126] [2021-11-20 05:32:23,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:32:23,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:23,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:23,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:23,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:32:23,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:32:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:23,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:32:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:23,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:24,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157238126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:24,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:24,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2021-11-20 05:32:24,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056802673] [2021-11-20 05:32:24,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:24,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 05:32:24,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:24,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 05:32:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:32:24,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:24,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1063 transitions, 15137 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:24,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:24,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:24,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:25,976 INFO L129 PetriNetUnfolder]: 902/2444 cut-off events. [2021-11-20 05:32:25,976 INFO L130 PetriNetUnfolder]: For 24814/24814 co-relation queries the response was YES. [2021-11-20 05:32:26,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16846 conditions, 2444 events. 902/2444 cut-off events. For 24814/24814 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18788 event pairs, 25 based on Foata normal form. 2/2435 useless extension candidates. Maximal degree in co-relation 16771. Up to 655 conditions per place. [2021-11-20 05:32:26,044 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 423 selfloop transitions, 865 changer transitions 30/1359 dead transitions. [2021-11-20 05:32:26,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1359 transitions, 22234 flow [2021-11-20 05:32:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 05:32:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-20 05:32:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1142 transitions. [2021-11-20 05:32:26,047 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6473922902494331 [2021-11-20 05:32:26,047 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1142 transitions. [2021-11-20 05:32:26,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1142 transitions. [2021-11-20 05:32:26,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:26,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1142 transitions. [2021-11-20 05:32:26,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 54.38095238095238) internal successors, (1142), 21 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,055 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,055 INFO L186 Difference]: Start difference. First operand has 286 places, 1063 transitions, 15137 flow. Second operand 21 states and 1142 transitions. [2021-11-20 05:32:26,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1359 transitions, 22234 flow [2021-11-20 05:32:26,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1359 transitions, 22072 flow, removed 61 selfloop flow, removed 8 redundant places. [2021-11-20 05:32:26,508 INFO L242 Difference]: Finished difference. Result has 310 places, 1313 transitions, 21449 flow [2021-11-20 05:32:26,509 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=14994, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=21449, PETRI_PLACES=310, PETRI_TRANSITIONS=1313} [2021-11-20 05:32:26,510 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 236 predicate places. [2021-11-20 05:32:26,510 INFO L470 AbstractCegarLoop]: Abstraction has has 310 places, 1313 transitions, 21449 flow [2021-11-20 05:32:26,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:26,511 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:26,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 05:32:26,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:26,725 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash -256606820, now seen corresponding path program 6 times [2021-11-20 05:32:26,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:26,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869670835] [2021-11-20 05:32:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:26,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:26,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869670835] [2021-11-20 05:32:26,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869670835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:26,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913781870] [2021-11-20 05:32:26,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:32:26,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:26,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:26,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:26,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:32:26,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-20 05:32:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:26,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:32:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:27,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:27,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913781870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:27,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:27,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2021-11-20 05:32:27,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887249809] [2021-11-20 05:32:27,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:27,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:32:27,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:32:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:32:27,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:27,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 1313 transitions, 21449 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:27,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:27,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:27,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:29,515 INFO L129 PetriNetUnfolder]: 1184/3283 cut-off events. [2021-11-20 05:32:29,515 INFO L130 PetriNetUnfolder]: For 42026/42026 co-relation queries the response was YES. [2021-11-20 05:32:29,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24888 conditions, 3283 events. 1184/3283 cut-off events. For 42026/42026 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 27445 event pairs, 40 based on Foata normal form. 4/3271 useless extension candidates. Maximal degree in co-relation 24800. Up to 1998 conditions per place. [2021-11-20 05:32:29,597 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1423 selfloop transitions, 326 changer transitions 15/1805 dead transitions. [2021-11-20 05:32:29,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1805 transitions, 33535 flow [2021-11-20 05:32:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:32:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-20 05:32:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2021-11-20 05:32:29,600 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2021-11-20 05:32:29,601 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2021-11-20 05:32:29,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2021-11-20 05:32:29,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:29,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2021-11-20 05:32:29,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:29,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:29,606 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:29,607 INFO L186 Difference]: Start difference. First operand has 310 places, 1313 transitions, 21449 flow. Second operand 16 states and 910 transitions. [2021-11-20 05:32:29,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1805 transitions, 33535 flow [2021-11-20 05:32:30,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1805 transitions, 33257 flow, removed 137 selfloop flow, removed 7 redundant places. [2021-11-20 05:32:30,308 INFO L242 Difference]: Finished difference. Result has 321 places, 1609 transitions, 27739 flow [2021-11-20 05:32:30,310 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=21321, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=27739, PETRI_PLACES=321, PETRI_TRANSITIONS=1609} [2021-11-20 05:32:30,311 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2021-11-20 05:32:30,311 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 1609 transitions, 27739 flow [2021-11-20 05:32:30,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:30,311 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:30,312 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:30,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 05:32:30,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:30,518 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1566346522, now seen corresponding path program 7 times [2021-11-20 05:32:30,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:30,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478506688] [2021-11-20 05:32:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:30,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:30,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478506688] [2021-11-20 05:32:30,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478506688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104008216] [2021-11-20 05:32:30,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:32:30,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:30,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:30,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:32:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:30,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:32:30,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:31,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:31,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104008216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:31,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:31,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2021-11-20 05:32:31,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463866061] [2021-11-20 05:32:31,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:31,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 05:32:31,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 05:32:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:32:31,556 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:31,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1609 transitions, 27739 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:31,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:31,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:31,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:34,990 INFO L129 PetriNetUnfolder]: 1703/5000 cut-off events. [2021-11-20 05:32:34,991 INFO L130 PetriNetUnfolder]: For 69565/69565 co-relation queries the response was YES. [2021-11-20 05:32:35,050 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37890 conditions, 5000 events. 1703/5000 cut-off events. For 69565/69565 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 47839 event pairs, 38 based on Foata normal form. 2/4991 useless extension candidates. Maximal degree in co-relation 37798. Up to 1034 conditions per place. [2021-11-20 05:32:35,106 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 394 selfloop transitions, 1872 changer transitions 23/2330 dead transitions. [2021-11-20 05:32:35,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 2330 transitions, 45066 flow [2021-11-20 05:32:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:32:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-20 05:32:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1484 transitions. [2021-11-20 05:32:35,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.654320987654321 [2021-11-20 05:32:35,122 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1484 transitions. [2021-11-20 05:32:35,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1484 transitions. [2021-11-20 05:32:35,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:35,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1484 transitions. [2021-11-20 05:32:35,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 54.96296296296296) internal successors, (1484), 27 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:35,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:35,138 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:35,138 INFO L186 Difference]: Start difference. First operand has 321 places, 1609 transitions, 27739 flow. Second operand 27 states and 1484 transitions. [2021-11-20 05:32:35,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 2330 transitions, 45066 flow [2021-11-20 05:32:36,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 2330 transitions, 44851 flow, removed 91 selfloop flow, removed 6 redundant places. [2021-11-20 05:32:36,472 INFO L242 Difference]: Finished difference. Result has 353 places, 2215 transitions, 44389 flow [2021-11-20 05:32:36,474 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=27591, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=44389, PETRI_PLACES=353, PETRI_TRANSITIONS=2215} [2021-11-20 05:32:36,474 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 279 predicate places. [2021-11-20 05:32:36,475 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 2215 transitions, 44389 flow [2021-11-20 05:32:36,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:36,475 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:36,476 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:36,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:36,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:32:36,688 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2035166528, now seen corresponding path program 8 times [2021-11-20 05:32:36,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:36,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419711905] [2021-11-20 05:32:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:36,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:36,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:36,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419711905] [2021-11-20 05:32:36,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419711905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:36,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481918532] [2021-11-20 05:32:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:32:36,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:36,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:36,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:36,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:32:36,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:32:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:32:36,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:37,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:37,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481918532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:37,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:37,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-11-20 05:32:37,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061071749] [2021-11-20 05:32:37,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:37,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:32:37,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:32:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:32:37,595 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:37,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 2215 transitions, 44389 flow. Second operand has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:37,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:37,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:37,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:43,915 INFO L129 PetriNetUnfolder]: 2283/6400 cut-off events. [2021-11-20 05:32:43,916 INFO L130 PetriNetUnfolder]: For 119641/119641 co-relation queries the response was YES. [2021-11-20 05:32:43,974 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56488 conditions, 6400 events. 2283/6400 cut-off events. For 119641/119641 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 62706 event pairs, 40 based on Foata normal form. 91/6475 useless extension candidates. Maximal degree in co-relation 56383. Up to 2538 conditions per place. [2021-11-20 05:32:44,042 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 1558 selfloop transitions, 1763 changer transitions 13/3375 dead transitions. [2021-11-20 05:32:44,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 3375 transitions, 74974 flow [2021-11-20 05:32:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-20 05:32:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-11-20 05:32:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3264 transitions. [2021-11-20 05:32:44,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2021-11-20 05:32:44,049 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3264 transitions. [2021-11-20 05:32:44,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3264 transitions. [2021-11-20 05:32:44,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:44,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3264 transitions. [2021-11-20 05:32:44,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 54.4) internal successors, (3264), 60 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:44,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:44,066 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:44,066 INFO L186 Difference]: Start difference. First operand has 353 places, 2215 transitions, 44389 flow. Second operand 60 states and 3264 transitions. [2021-11-20 05:32:44,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 3375 transitions, 74974 flow [2021-11-20 05:32:46,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 3375 transitions, 73734 flow, removed 101 selfloop flow, removed 6 redundant places. [2021-11-20 05:32:46,938 INFO L242 Difference]: Finished difference. Result has 438 places, 3201 transitions, 71161 flow [2021-11-20 05:32:46,941 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=43529, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=927, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=71161, PETRI_PLACES=438, PETRI_TRANSITIONS=3201} [2021-11-20 05:32:46,941 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 364 predicate places. [2021-11-20 05:32:46,941 INFO L470 AbstractCegarLoop]: Abstraction has has 438 places, 3201 transitions, 71161 flow [2021-11-20 05:32:46,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:46,942 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:32:46,942 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:46,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:47,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 05:32:47,169 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:32:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash 651113190, now seen corresponding path program 9 times [2021-11-20 05:32:47,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:47,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741332336] [2021-11-20 05:32:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:47,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:47,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:47,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741332336] [2021-11-20 05:32:47,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741332336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:47,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374053372] [2021-11-20 05:32:47,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:32:47,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:47,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:47,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:47,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:32:47,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:32:47,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:47,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:32:47,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:47,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:47,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374053372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:47,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:47,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2021-11-20 05:32:47,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871329260] [2021-11-20 05:32:47,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:47,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:32:47,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:47,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:32:47,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:32:47,745 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:32:47,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 3201 transitions, 71161 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:47,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:32:47,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:32:47,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:32:55,735 INFO L129 PetriNetUnfolder]: 2504/7001 cut-off events. [2021-11-20 05:32:55,735 INFO L130 PetriNetUnfolder]: For 157005/157005 co-relation queries the response was YES. [2021-11-20 05:32:55,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67612 conditions, 7001 events. 2504/7001 cut-off events. For 157005/157005 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 69741 event pairs, 57 based on Foata normal form. 5/6984 useless extension candidates. Maximal degree in co-relation 67475. Up to 5052 conditions per place. [2021-11-20 05:32:55,914 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 3208 selfloop transitions, 289 changer transitions 23/3561 dead transitions. [2021-11-20 05:32:55,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 3561 transitions, 86305 flow [2021-11-20 05:32:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:32:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-20 05:32:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2021-11-20 05:32:55,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2021-11-20 05:32:55,917 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2021-11-20 05:32:55,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2021-11-20 05:32:55,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:32:55,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2021-11-20 05:32:55,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:55,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 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) [2021-11-20 05:32:55,923 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 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) [2021-11-20 05:32:55,923 INFO L186 Difference]: Start difference. First operand has 438 places, 3201 transitions, 71161 flow. Second operand 18 states and 1006 transitions. [2021-11-20 05:32:55,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 3561 transitions, 86305 flow [2021-11-20 05:33:00,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 3561 transitions, 85116 flow, removed 579 selfloop flow, removed 8 redundant places. [2021-11-20 05:33:00,984 INFO L242 Difference]: Finished difference. Result has 456 places, 3414 transitions, 75999 flow [2021-11-20 05:33:00,987 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=70028, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2960, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=75999, PETRI_PLACES=456, PETRI_TRANSITIONS=3414} [2021-11-20 05:33:00,988 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 382 predicate places. [2021-11-20 05:33:00,988 INFO L470 AbstractCegarLoop]: Abstraction has has 456 places, 3414 transitions, 75999 flow [2021-11-20 05:33:00,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:00,988 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:33:00,989 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:01,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:01,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 05:33:01,208 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:33:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash -809805549, now seen corresponding path program 10 times [2021-11-20 05:33:01,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:01,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409532426] [2021-11-20 05:33:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:01,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:01,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:01,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409532426] [2021-11-20 05:33:01,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409532426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:01,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654965676] [2021-11-20 05:33:01,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:33:01,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:01,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:01,306 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:01,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:33:01,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:33:01,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:33:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:01,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:01,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654965676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:01,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:01,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-11-20 05:33:01,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758553751] [2021-11-20 05:33:01,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:01,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 05:33:01,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 05:33:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:33:01,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:33:01,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 3414 transitions, 75999 flow. Second operand has 21 states, 21 states have (on average 53.714285714285715) internal successors, (1128), 21 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:01,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:33:01,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:33:01,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:33:11,439 INFO L129 PetriNetUnfolder]: 2699/7480 cut-off events. [2021-11-20 05:33:11,439 INFO L130 PetriNetUnfolder]: For 170759/170759 co-relation queries the response was YES. [2021-11-20 05:33:11,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72946 conditions, 7480 events. 2699/7480 cut-off events. For 170759/170759 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 75241 event pairs, 24 based on Foata normal form. 40/7510 useless extension candidates. Maximal degree in co-relation 72799. Up to 2843 conditions per place. [2021-11-20 05:33:11,589 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 2420 selfloop transitions, 1298 changer transitions 32/3791 dead transitions. [2021-11-20 05:33:11,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 3791 transitions, 91902 flow [2021-11-20 05:33:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:33:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-20 05:33:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1071 transitions. [2021-11-20 05:33:11,592 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2021-11-20 05:33:11,592 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1071 transitions. [2021-11-20 05:33:11,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1071 transitions. [2021-11-20 05:33:11,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:33:11,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1071 transitions. [2021-11-20 05:33:11,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:11,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:11,598 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:11,598 INFO L186 Difference]: Start difference. First operand has 456 places, 3414 transitions, 75999 flow. Second operand 19 states and 1071 transitions. [2021-11-20 05:33:11,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 3791 transitions, 91902 flow [2021-11-20 05:33:16,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 3791 transitions, 91464 flow, removed 195 selfloop flow, removed 8 redundant places. [2021-11-20 05:33:16,724 INFO L242 Difference]: Finished difference. Result has 473 places, 3600 transitions, 85104 flow [2021-11-20 05:33:16,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=75573, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=85104, PETRI_PLACES=473, PETRI_TRANSITIONS=3600} [2021-11-20 05:33:16,727 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 399 predicate places. [2021-11-20 05:33:16,727 INFO L470 AbstractCegarLoop]: Abstraction has has 473 places, 3600 transitions, 85104 flow [2021-11-20 05:33:16,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.714285714285715) internal successors, (1128), 21 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:16,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:33:16,728 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:16,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:16,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:33:16,945 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:33:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:16,945 INFO L85 PathProgramCache]: Analyzing trace with hash 830866871, now seen corresponding path program 11 times [2021-11-20 05:33:16,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:16,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246549729] [2021-11-20 05:33:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:16,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:17,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246549729] [2021-11-20 05:33:17,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246549729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003226086] [2021-11-20 05:33:17,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:33:17,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:17,113 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:17,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:33:17,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 05:33:17,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:33:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:17,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:17,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003226086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:17,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:17,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 24 [2021-11-20 05:33:17,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460008140] [2021-11-20 05:33:17,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:17,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:33:17,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:33:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:33:17,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:33:17,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 3600 transitions, 85104 flow. Second operand has 24 states, 24 states have (on average 53.416666666666664) internal successors, (1282), 24 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:17,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:33:17,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:33:17,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:33:30,949 INFO L129 PetriNetUnfolder]: 3339/9215 cut-off events. [2021-11-20 05:33:30,949 INFO L130 PetriNetUnfolder]: For 262090/262090 co-relation queries the response was YES. [2021-11-20 05:33:31,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96263 conditions, 9215 events. 3339/9215 cut-off events. For 262090/262090 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 94572 event pairs, 26 based on Foata normal form. 62/9265 useless extension candidates. Maximal degree in co-relation 96109. Up to 2765 conditions per place. [2021-11-20 05:33:31,152 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2268 selfloop transitions, 2381 changer transitions 43/4733 dead transitions. [2021-11-20 05:33:31,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 4733 transitions, 122287 flow [2021-11-20 05:33:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-20 05:33:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-11-20 05:33:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4019 transitions. [2021-11-20 05:33:31,159 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6554142204827136 [2021-11-20 05:33:31,159 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4019 transitions. [2021-11-20 05:33:31,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4019 transitions. [2021-11-20 05:33:31,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:33:31,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4019 transitions. [2021-11-20 05:33:31,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 55.054794520547944) internal successors, (4019), 73 states have internal predecessors, (4019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:31,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 84.0) internal successors, (6216), 74 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:31,180 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 84.0) internal successors, (6216), 74 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:31,180 INFO L186 Difference]: Start difference. First operand has 473 places, 3600 transitions, 85104 flow. Second operand 73 states and 4019 transitions. [2021-11-20 05:33:31,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 4733 transitions, 122287 flow [2021-11-20 05:33:38,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 4733 transitions, 121618 flow, removed 263 selfloop flow, removed 8 redundant places. [2021-11-20 05:33:38,608 INFO L242 Difference]: Finished difference. Result has 566 places, 4484 transitions, 116723 flow [2021-11-20 05:33:38,611 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=84714, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=116723, PETRI_PLACES=566, PETRI_TRANSITIONS=4484} [2021-11-20 05:33:38,611 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 492 predicate places. [2021-11-20 05:33:38,611 INFO L470 AbstractCegarLoop]: Abstraction has has 566 places, 4484 transitions, 116723 flow [2021-11-20 05:33:38,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.416666666666664) internal successors, (1282), 24 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:38,612 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:33:38,612 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:38,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:38,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 05:33:38,837 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:33:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1282516783, now seen corresponding path program 12 times [2021-11-20 05:33:38,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:38,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280332207] [2021-11-20 05:33:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:38,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:38,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280332207] [2021-11-20 05:33:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280332207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:38,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084803491] [2021-11-20 05:33:38,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:33:38,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:38,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:38,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:38,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:33:38,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 05:33:38,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:38,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:33:38,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:39,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084803491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:39,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:39,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2021-11-20 05:33:39,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405016377] [2021-11-20 05:33:39,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:39,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:33:39,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:39,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:33:39,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:33:39,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:33:39,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 4484 transitions, 116723 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:39,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:33:39,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:33:39,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:33:59,075 INFO L129 PetriNetUnfolder]: 4185/11211 cut-off events. [2021-11-20 05:33:59,075 INFO L130 PetriNetUnfolder]: For 376030/376030 co-relation queries the response was YES. [2021-11-20 05:33:59,287 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129514 conditions, 11211 events. 4185/11211 cut-off events. For 376030/376030 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 116942 event pairs, 74 based on Foata normal form. 10/11178 useless extension candidates. Maximal degree in co-relation 129332. Up to 4668 conditions per place. [2021-11-20 05:33:59,381 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3422 selfloop transitions, 2342 changer transitions 50/5855 dead transitions. [2021-11-20 05:33:59,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 5855 transitions, 166429 flow [2021-11-20 05:33:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 05:33:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-20 05:33:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2627 transitions. [2021-11-20 05:33:59,400 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6515376984126984 [2021-11-20 05:33:59,400 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2627 transitions. [2021-11-20 05:33:59,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2627 transitions. [2021-11-20 05:33:59,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:33:59,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2627 transitions. [2021-11-20 05:33:59,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 54.729166666666664) internal successors, (2627), 48 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:59,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:59,413 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:59,413 INFO L186 Difference]: Start difference. First operand has 566 places, 4484 transitions, 116723 flow. Second operand 48 states and 2627 transitions. [2021-11-20 05:33:59,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 5855 transitions, 166429 flow [2021-11-20 05:34:13,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 5855 transitions, 162248 flow, removed 2043 selfloop flow, removed 9 redundant places. [2021-11-20 05:34:13,318 INFO L242 Difference]: Finished difference. Result has 627 places, 5449 transitions, 150187 flow [2021-11-20 05:34:13,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=112776, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=150187, PETRI_PLACES=627, PETRI_TRANSITIONS=5449} [2021-11-20 05:34:13,323 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 553 predicate places. [2021-11-20 05:34:13,324 INFO L470 AbstractCegarLoop]: Abstraction has has 627 places, 5449 transitions, 150187 flow [2021-11-20 05:34:13,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:13,325 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:34:13,325 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:13,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:13,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:34:13,541 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:34:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash -361111855, now seen corresponding path program 13 times [2021-11-20 05:34:13,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:13,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763514304] [2021-11-20 05:34:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:13,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:13,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:13,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763514304] [2021-11-20 05:34:13,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763514304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:13,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993178271] [2021-11-20 05:34:13,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:34:13,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:13,644 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:13,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:34:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:13,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:34:13,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:14,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:14,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993178271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:14,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:14,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2021-11-20 05:34:14,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698305493] [2021-11-20 05:34:14,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:14,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 05:34:14,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 05:34:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-11-20 05:34:14,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:34:14,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 5449 transitions, 150187 flow. Second operand has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:14,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:34:14,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:34:14,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:34:38,186 INFO L129 PetriNetUnfolder]: 4405/11547 cut-off events. [2021-11-20 05:34:38,186 INFO L130 PetriNetUnfolder]: For 436007/436007 co-relation queries the response was YES. [2021-11-20 05:34:38,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139820 conditions, 11547 events. 4405/11547 cut-off events. For 436007/436007 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 119202 event pairs, 35 based on Foata normal form. 76/11608 useless extension candidates. Maximal degree in co-relation 139617. Up to 3746 conditions per place. [2021-11-20 05:34:38,500 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 3052 selfloop transitions, 2935 changer transitions 39/6067 dead transitions. [2021-11-20 05:34:38,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 6067 transitions, 179278 flow [2021-11-20 05:34:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 05:34:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-11-20 05:34:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3550 transitions. [2021-11-20 05:34:38,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6501831501831502 [2021-11-20 05:34:38,505 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3550 transitions. [2021-11-20 05:34:38,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3550 transitions. [2021-11-20 05:34:38,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:34:38,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3550 transitions. [2021-11-20 05:34:38,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.61538461538461) internal successors, (3550), 65 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:38,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 84.0) internal successors, (5544), 66 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:38,521 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 84.0) internal successors, (5544), 66 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:38,521 INFO L186 Difference]: Start difference. First operand has 627 places, 5449 transitions, 150187 flow. Second operand 65 states and 3550 transitions. [2021-11-20 05:34:38,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 6067 transitions, 179278 flow [2021-11-20 05:34:53,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 6067 transitions, 174609 flow, removed 2199 selfloop flow, removed 13 redundant places. [2021-11-20 05:34:53,832 INFO L242 Difference]: Finished difference. Result has 686 places, 5838 transitions, 166948 flow [2021-11-20 05:34:53,836 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=144710, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=166948, PETRI_PLACES=686, PETRI_TRANSITIONS=5838} [2021-11-20 05:34:53,836 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 612 predicate places. [2021-11-20 05:34:53,837 INFO L470 AbstractCegarLoop]: Abstraction has has 686 places, 5838 transitions, 166948 flow [2021-11-20 05:34:53,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:53,837 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:34:53,837 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:53,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:54,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:54,051 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:34:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -101171717, now seen corresponding path program 14 times [2021-11-20 05:34:54,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:54,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004858147] [2021-11-20 05:34:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:54,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:54,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:54,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004858147] [2021-11-20 05:34:54,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004858147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:54,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612185974] [2021-11-20 05:34:54,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:34:54,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:54,134 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:54,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:34:54,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:34:54,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:54,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:34:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:54,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:54,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612185974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:54,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:54,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-20 05:34:54,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449779966] [2021-11-20 05:34:54,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:54,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:34:54,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:54,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:34:54,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:34:54,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:34:54,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 5838 transitions, 166948 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:54,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:34:54,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:34:54,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:35:23,280 INFO L129 PetriNetUnfolder]: 4825/12575 cut-off events. [2021-11-20 05:35:23,280 INFO L130 PetriNetUnfolder]: For 510596/510596 co-relation queries the response was YES. [2021-11-20 05:35:23,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158312 conditions, 12575 events. 4825/12575 cut-off events. For 510596/510596 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 131034 event pairs, 95 based on Foata normal form. 16/12540 useless extension candidates. Maximal degree in co-relation 158097. Up to 6368 conditions per place. [2021-11-20 05:35:23,885 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4261 selfloop transitions, 2257 changer transitions 45/6604 dead transitions. [2021-11-20 05:35:23,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 6604 transitions, 203941 flow [2021-11-20 05:35:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 05:35:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-20 05:35:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1876 transitions. [2021-11-20 05:35:23,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2021-11-20 05:35:23,887 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1876 transitions. [2021-11-20 05:35:23,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1876 transitions. [2021-11-20 05:35:23,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:35:23,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1876 transitions. [2021-11-20 05:35:23,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.1764705882353) internal successors, (1876), 34 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:23,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:23,893 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:23,894 INFO L186 Difference]: Start difference. First operand has 686 places, 5838 transitions, 166948 flow. Second operand 34 states and 1876 transitions. [2021-11-20 05:35:23,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 6604 transitions, 203941 flow [2021-11-20 05:35:41,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 6604 transitions, 200125 flow, removed 672 selfloop flow, removed 14 redundant places. [2021-11-20 05:35:41,431 INFO L242 Difference]: Finished difference. Result has 719 places, 6407 transitions, 191902 flow [2021-11-20 05:35:41,435 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=162626, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=191902, PETRI_PLACES=719, PETRI_TRANSITIONS=6407} [2021-11-20 05:35:41,435 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 645 predicate places. [2021-11-20 05:35:41,436 INFO L470 AbstractCegarLoop]: Abstraction has has 719 places, 6407 transitions, 191902 flow [2021-11-20 05:35:41,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:41,436 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:35:41,436 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:41,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:41,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:41,637 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:35:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:41,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1274498319, now seen corresponding path program 15 times [2021-11-20 05:35:41,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:41,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676811214] [2021-11-20 05:35:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:41,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:35:41,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676811214] [2021-11-20 05:35:41,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676811214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005420378] [2021-11-20 05:35:41,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:35:41,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:41,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:41,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:41,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:35:41,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:35:41,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:41,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:35:41,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:35:42,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:35:42,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005420378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:42,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:42,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-20 05:35:42,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797201298] [2021-11-20 05:35:42,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:42,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:35:42,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:42,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:35:42,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:35:42,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:35:42,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 6407 transitions, 191902 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:42,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:35:42,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:35:42,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:36:22,014 INFO L129 PetriNetUnfolder]: 5088/13323 cut-off events. [2021-11-20 05:36:22,014 INFO L130 PetriNetUnfolder]: For 597206/597206 co-relation queries the response was YES. [2021-11-20 05:36:22,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171117 conditions, 13323 events. 5088/13323 cut-off events. For 597206/597206 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 139806 event pairs, 29 based on Foata normal form. 46/13353 useless extension candidates. Maximal degree in co-relation 170888. Up to 4825 conditions per place. [2021-11-20 05:36:22,626 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4133 selfloop transitions, 2804 changer transitions 32/7010 dead transitions. [2021-11-20 05:36:22,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 7010 transitions, 223615 flow [2021-11-20 05:36:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-20 05:36:22,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-11-20 05:36:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3077 transitions. [2021-11-20 05:36:22,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.654124149659864 [2021-11-20 05:36:22,638 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3077 transitions. [2021-11-20 05:36:22,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3077 transitions. [2021-11-20 05:36:22,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:36:22,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3077 transitions. [2021-11-20 05:36:22,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 54.94642857142857) internal successors, (3077), 56 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:22,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:22,651 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:22,652 INFO L186 Difference]: Start difference. First operand has 719 places, 6407 transitions, 191902 flow. Second operand 56 states and 3077 transitions. [2021-11-20 05:36:22,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 7010 transitions, 223615 flow [2021-11-20 05:36:43,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 7010 transitions, 221874 flow, removed 757 selfloop flow, removed 13 redundant places. [2021-11-20 05:36:44,157 INFO L242 Difference]: Finished difference. Result has 789 places, 6788 transitions, 213247 flow [2021-11-20 05:36:44,162 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=190152, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=213247, PETRI_PLACES=789, PETRI_TRANSITIONS=6788} [2021-11-20 05:36:44,162 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 715 predicate places. [2021-11-20 05:36:44,163 INFO L470 AbstractCegarLoop]: Abstraction has has 789 places, 6788 transitions, 213247 flow [2021-11-20 05:36:44,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:44,163 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:36:44,163 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:44,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:44,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 05:36:44,375 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:36:44,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1301530661, now seen corresponding path program 16 times [2021-11-20 05:36:44,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:44,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556845235] [2021-11-20 05:36:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:44,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:36:44,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:44,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556845235] [2021-11-20 05:36:44,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556845235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:44,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381989854] [2021-11-20 05:36:44,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:36:44,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:44,468 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:44,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:36:44,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:36:44,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:36:44,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:36:44,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:36:44,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:36:45,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381989854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:45,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:45,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2021-11-20 05:36:45,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787100949] [2021-11-20 05:36:45,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:45,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:36:45,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:36:45,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:36:45,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:36:45,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 6788 transitions, 213247 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:45,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:36:45,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:36:45,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:37:40,662 INFO L129 PetriNetUnfolder]: 6449/16940 cut-off events. [2021-11-20 05:37:40,662 INFO L130 PetriNetUnfolder]: For 854343/854343 co-relation queries the response was YES. [2021-11-20 05:37:41,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229564 conditions, 16940 events. 6449/16940 cut-off events. For 854343/854343 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 182940 event pairs, 43 based on Foata normal form. 38/16961 useless extension candidates. Maximal degree in co-relation 229310. Up to 4663 conditions per place. [2021-11-20 05:37:41,372 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4041 selfloop transitions, 4952 changer transitions 26/9060 dead transitions. [2021-11-20 05:37:41,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 9060 transitions, 307281 flow [2021-11-20 05:37:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:37:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-20 05:37:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2060 transitions. [2021-11-20 05:37:41,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6628056628056628 [2021-11-20 05:37:41,374 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2060 transitions. [2021-11-20 05:37:41,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2060 transitions. [2021-11-20 05:37:41,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:37:41,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2060 transitions. [2021-11-20 05:37:41,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.67567567567568) internal successors, (2060), 37 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:41,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:41,381 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:41,381 INFO L186 Difference]: Start difference. First operand has 789 places, 6788 transitions, 213247 flow. Second operand 37 states and 2060 transitions. [2021-11-20 05:37:41,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 9060 transitions, 307281 flow [2021-11-20 05:38:12,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 817 places, 9060 transitions, 303499 flow, removed 1739 selfloop flow, removed 8 redundant places. [2021-11-20 05:38:12,408 INFO L242 Difference]: Finished difference. Result has 838 places, 8562 transitions, 293684 flow [2021-11-20 05:38:12,413 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=210165, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=293684, PETRI_PLACES=838, PETRI_TRANSITIONS=8562} [2021-11-20 05:38:12,413 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 764 predicate places. [2021-11-20 05:38:12,413 INFO L470 AbstractCegarLoop]: Abstraction has has 838 places, 8562 transitions, 293684 flow [2021-11-20 05:38:12,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:12,414 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:38:12,414 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:12,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:12,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:12,614 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:38:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1830625463, now seen corresponding path program 17 times [2021-11-20 05:38:12,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:12,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568412372] [2021-11-20 05:38:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:12,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:12,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:12,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568412372] [2021-11-20 05:38:12,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568412372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:12,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073313639] [2021-11-20 05:38:12,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:38:12,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:12,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:12,714 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:12,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:38:12,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 05:38:12,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:12,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:38:12,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:12,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:13,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073313639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:13,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:13,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-11-20 05:38:13,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188722545] [2021-11-20 05:38:13,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:13,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:38:13,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:13,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:38:13,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:38:13,184 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:38:13,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 838 places, 8562 transitions, 293684 flow. Second operand has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:13,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:38:13,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:38:13,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:39:27,085 INFO L129 PetriNetUnfolder]: 6561/17074 cut-off events. [2021-11-20 05:39:27,085 INFO L130 PetriNetUnfolder]: For 982279/982279 co-relation queries the response was YES. [2021-11-20 05:39:27,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246336 conditions, 17074 events. 6561/17074 cut-off events. For 982279/982279 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 183412 event pairs, 131 based on Foata normal form. 2/17008 useless extension candidates. Maximal degree in co-relation 246062. Up to 9047 conditions per place. [2021-11-20 05:39:27,973 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 6415 selfloop transitions, 2509 changer transitions 12/8977 dead transitions. [2021-11-20 05:39:27,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 8977 transitions, 325509 flow [2021-11-20 05:39:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:39:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-20 05:39:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 779 transitions. [2021-11-20 05:39:27,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6624149659863946 [2021-11-20 05:39:27,975 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 779 transitions. [2021-11-20 05:39:27,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 779 transitions. [2021-11-20 05:39:27,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:39:27,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 779 transitions. [2021-11-20 05:39:27,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.642857142857146) internal successors, (779), 14 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:27,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:27,979 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:27,979 INFO L186 Difference]: Start difference. First operand has 838 places, 8562 transitions, 293684 flow. Second operand 14 states and 779 transitions. [2021-11-20 05:39:27,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 8977 transitions, 325509 flow [2021-11-20 05:40:06,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 8977 transitions, 323478 flow, removed 990 selfloop flow, removed 8 redundant places. [2021-11-20 05:40:07,207 INFO L242 Difference]: Finished difference. Result has 847 places, 8679 transitions, 304878 flow [2021-11-20 05:40:07,216 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=291798, PETRI_DIFFERENCE_MINUEND_PLACES=830, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6057, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=304878, PETRI_PLACES=847, PETRI_TRANSITIONS=8679} [2021-11-20 05:40:07,217 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 773 predicate places. [2021-11-20 05:40:07,217 INFO L470 AbstractCegarLoop]: Abstraction has has 847 places, 8679 transitions, 304878 flow [2021-11-20 05:40:07,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:07,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:40:07,218 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:40:07,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:40:07,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 05:40:07,433 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:40:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:40:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2085433135, now seen corresponding path program 18 times [2021-11-20 05:40:07,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:40:07,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664948806] [2021-11-20 05:40:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:40:07,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:40:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:40:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:40:07,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:40:07,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664948806] [2021-11-20 05:40:07,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664948806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:40:07,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637378188] [2021-11-20 05:40:07,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:40:07,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:07,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:40:07,549 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:40:07,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:40:07,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-20 05:40:07,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:40:07,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:40:07,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:40:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:40:07,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:40:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:40:08,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637378188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:40:08,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:40:08,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2021-11-20 05:40:08,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351139002] [2021-11-20 05:40:08,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:40:08,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:40:08,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:40:08,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:40:08,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:40:08,208 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:40:08,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 847 places, 8679 transitions, 304878 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:08,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:40:08,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:40:08,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:41:26,244 INFO L129 PetriNetUnfolder]: 7282/18969 cut-off events. [2021-11-20 05:41:26,244 INFO L130 PetriNetUnfolder]: For 1145877/1145877 co-relation queries the response was YES. [2021-11-20 05:41:27,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276882 conditions, 18969 events. 7282/18969 cut-off events. For 1145877/1145877 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 207782 event pairs, 131 based on Foata normal form. 8/18917 useless extension candidates. Maximal degree in co-relation 276603. Up to 6105 conditions per place. [2021-11-20 05:41:27,474 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4213 selfloop transitions, 5654 changer transitions 20/9928 dead transitions. [2021-11-20 05:41:27,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 9928 transitions, 366939 flow [2021-11-20 05:41:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 05:41:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-20 05:41:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2134 transitions. [2021-11-20 05:41:27,478 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6514041514041514 [2021-11-20 05:41:27,478 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2134 transitions. [2021-11-20 05:41:27,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2134 transitions. [2021-11-20 05:41:27,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:41:27,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2134 transitions. [2021-11-20 05:41:27,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 54.717948717948715) internal successors, (2134), 39 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:27,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:27,487 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:27,487 INFO L186 Difference]: Start difference. First operand has 847 places, 8679 transitions, 304878 flow. Second operand 39 states and 2134 transitions. [2021-11-20 05:41:27,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 9928 transitions, 366939 flow [2021-11-20 05:42:11,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 875 places, 9928 transitions, 366516 flow, removed 69 selfloop flow, removed 8 redundant places. [2021-11-20 05:42:12,153 INFO L242 Difference]: Finished difference. Result has 896 places, 9714 transitions, 358861 flow [2021-11-20 05:42:12,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=304355, PETRI_DIFFERENCE_MINUEND_PLACES=837, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=358861, PETRI_PLACES=896, PETRI_TRANSITIONS=9714} [2021-11-20 05:42:12,176 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 822 predicate places. [2021-11-20 05:42:12,176 INFO L470 AbstractCegarLoop]: Abstraction has has 896 places, 9714 transitions, 358861 flow [2021-11-20 05:42:12,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:12,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:42:12,177 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:12,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:12,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 05:42:12,401 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:42:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1644724205, now seen corresponding path program 19 times [2021-11-20 05:42:12,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:12,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931521201] [2021-11-20 05:42:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:12,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:42:12,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:12,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931521201] [2021-11-20 05:42:12,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931521201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:12,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774287847] [2021-11-20 05:42:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:42:12,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:12,477 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:12,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:42:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:42:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:42:12,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:42:13,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774287847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:13,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:42:13,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-20 05:42:13,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657475239] [2021-11-20 05:42:13,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:13,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:42:13,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:42:13,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:42:13,074 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:42:13,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 896 places, 9714 transitions, 358861 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:13,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:42:13,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:42:13,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 05:43:45,655 INFO L129 PetriNetUnfolder]: 7333/18960 cut-off events. [2021-11-20 05:43:45,655 INFO L130 PetriNetUnfolder]: For 1286286/1286286 co-relation queries the response was YES. [2021-11-20 05:43:46,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290544 conditions, 18960 events. 7333/18960 cut-off events. For 1286286/1286286 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 206606 event pairs, 125 based on Foata normal form. 9/18908 useless extension candidates. Maximal degree in co-relation 290246. Up to 9381 conditions per place. [2021-11-20 05:43:46,902 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 6153 selfloop transitions, 3817 changer transitions 15/10026 dead transitions. [2021-11-20 05:43:46,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 935 places, 10026 transitions, 389006 flow [2021-11-20 05:43:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 05:43:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-20 05:43:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2316 transitions. [2021-11-20 05:43:46,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2021-11-20 05:43:46,904 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2316 transitions. [2021-11-20 05:43:46,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2316 transitions. [2021-11-20 05:43:46,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 05:43:46,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2316 transitions. [2021-11-20 05:43:46,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.142857142857146) internal successors, (2316), 42 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:46,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:46,913 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:46,913 INFO L186 Difference]: Start difference. First operand has 896 places, 9714 transitions, 358861 flow. Second operand 42 states and 2316 transitions. [2021-11-20 05:43:46,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 935 places, 10026 transitions, 389006 flow [2021-11-20 05:44:37,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 923 places, 10026 transitions, 385755 flow, removed 1547 selfloop flow, removed 12 redundant places. [2021-11-20 05:44:37,904 INFO L242 Difference]: Finished difference. Result has 924 places, 9775 transitions, 367809 flow [2021-11-20 05:44:37,910 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=354993, PETRI_DIFFERENCE_MINUEND_PLACES=882, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=367809, PETRI_PLACES=924, PETRI_TRANSITIONS=9775} [2021-11-20 05:44:37,910 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 850 predicate places. [2021-11-20 05:44:37,910 INFO L470 AbstractCegarLoop]: Abstraction has has 924 places, 9775 transitions, 367809 flow [2021-11-20 05:44:37,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:37,911 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 05:44:37,911 INFO L254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:44:37,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:38,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 05:44:38,111 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 05:44:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:38,112 INFO L85 PathProgramCache]: Analyzing trace with hash 461614151, now seen corresponding path program 20 times [2021-11-20 05:44:38,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:44:38,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986275268] [2021-11-20 05:44:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:38,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:44:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:44:38,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:44:38,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986275268] [2021-11-20 05:44:38,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986275268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:44:38,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694717184] [2021-11-20 05:44:38,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:44:38,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:44:38,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:44:38,188 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:44:38,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d68765-89c5-44bb-9c74-24ab716b9300/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:44:38,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:44:38,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:44:38,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:44:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:44:38,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:44:38,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694717184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:38,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:44:38,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-20 05:44:38,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180921529] [2021-11-20 05:44:38,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:38,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:44:38,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:44:38,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:44:38,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:44:38,739 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-11-20 05:44:38,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 924 places, 9775 transitions, 367809 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:44:38,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 05:44:38,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-11-20 05:44:38,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand