./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX --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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:32:26,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:32:26,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:32:27,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:32:27,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:32:27,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:32:27,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:32:27,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:32:27,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:32:27,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:32:27,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:32:27,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:32:27,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:32:27,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:32:27,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:32:27,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:32:27,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:32:27,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:32:27,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:32:27,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:32:27,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:32:27,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:32:27,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:32:27,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:32:27,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:32:27,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:32:27,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:32:27,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:32:27,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:32:27,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:32:27,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:32:27,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:32:27,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:32:27,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:32:27,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:32:27,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:32:27,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:32:27,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:32:27,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:32:27,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:32:27,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:32:27,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:32:27,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:32:27,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:32:27,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:32:27,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:32:27,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:32:27,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:32:27,127 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:32:27,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:32:27,128 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:32:27,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:32:27,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:32:27,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:32:27,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:32:27,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:32:27,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:32:27,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:32:27,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:32:27,131 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:32:27,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:32:27,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:32:27,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:32:27,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:32:27,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:32:27,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:32:27,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:32:27,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:32:27,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:32:27,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:32:27,142 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:32:27,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:32:27,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:32:27,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:32:27,143 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_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2021-11-09 08:32:27,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:32:27,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:32:27,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:32:27,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:32:27,452 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:32:27,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2021-11-09 08:32:27,511 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/data/591b83beb/ef62cb72dc2f4968aa311b00c63b50dc/FLAGa183c4878 [2021-11-09 08:32:27,959 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:32:27,960 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2021-11-09 08:32:27,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/data/591b83beb/ef62cb72dc2f4968aa311b00c63b50dc/FLAGa183c4878 [2021-11-09 08:32:28,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/data/591b83beb/ef62cb72dc2f4968aa311b00c63b50dc [2021-11-09 08:32:28,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:32:28,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:32:28,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:32:28,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:32:28,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:32:28,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccb2186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28, skipping insertion in model container [2021-11-09 08:32:28,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:32:28,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:32:28,600 WARN L228 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_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2021-11-09 08:32:28,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:32:28,617 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:32:28,638 WARN L228 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_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2021-11-09 08:32:28,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:32:28,656 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:32:28,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28 WrapperNode [2021-11-09 08:32:28,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:32:28,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:32:28,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:32:28,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:32:28,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:32:28,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:32:28,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:32:28,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:32:28,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:32:28,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:32:28,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:32:28,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:32:28,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (1/1) ... [2021-11-09 08:32:28,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:32:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:28,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:28,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:32:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-09 08:32:28,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-09 08:32:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-09 08:32:28,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-09 08:32:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:32:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:32:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:32:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 08:32:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 08:32:28,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:32:28,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:32:28,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:32:28,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:32:28,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:32:28,835 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 08:32:29,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:32:29,553 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-11-09 08:32:29,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:32:29 BoogieIcfgContainer [2021-11-09 08:32:29,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:32:29,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:32:29,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:32:29,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:32:29,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:32:28" (1/3) ... [2021-11-09 08:32:29,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470e95ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:32:29, skipping insertion in model container [2021-11-09 08:32:29,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:28" (2/3) ... [2021-11-09 08:32:29,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470e95ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:32:29, skipping insertion in model container [2021-11-09 08:32:29,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:32:29" (3/3) ... [2021-11-09 08:32:29,564 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2021-11-09 08:32:29,570 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 08:32:29,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:32:29,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:32:29,571 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 08:32:29,600 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,601 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,601 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,601 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,602 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,602 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,602 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,602 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,603 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,603 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,603 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,603 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,604 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,605 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,605 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,606 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,607 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,608 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,608 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,609 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,609 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,609 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,609 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,610 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,610 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,610 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,610 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,611 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,611 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,611 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,612 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,613 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,613 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,613 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,613 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,614 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,614 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,614 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,614 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,615 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,615 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,618 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,618 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,619 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,620 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,620 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,620 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,622 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,623 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,624 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,624 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 08:32:29,630 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-09 08:32:29,679 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:32:29,685 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 [2021-11-09 08:32:29,686 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 08:32:29,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 160 transitions, 336 flow [2021-11-09 08:32:29,819 INFO L129 PetriNetUnfolder]: 13/158 cut-off events. [2021-11-09 08:32:29,820 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:32:29,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 158 events. 13/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2021-11-09 08:32:29,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 160 transitions, 336 flow [2021-11-09 08:32:29,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 150 transitions, 312 flow [2021-11-09 08:32:29,864 INFO L129 PetriNetUnfolder]: 13/149 cut-off events. [2021-11-09 08:32:29,865 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:32:29,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:29,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:29,866 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1275624224, now seen corresponding path program 1 times [2021-11-09 08:32:29,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:29,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429636122] [2021-11-09 08:32:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:29,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:30,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:30,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429636122] [2021-11-09 08:32:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429636122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:30,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:30,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:32:30,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887122395] [2021-11-09 08:32:30,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:32:30,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:32:30,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:32:30,220 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 160 [2021-11-09 08:32:30,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 150 transitions, 312 flow. Second operand has 2 states, 2 states have (on average 151.5) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:30,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 160 [2021-11-09 08:32:30,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:30,262 INFO L129 PetriNetUnfolder]: 4/141 cut-off events. [2021-11-09 08:32:30,264 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-09 08:32:30,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 141 events. 4/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 9/141 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2021-11-09 08:32:30,268 INFO L132 encePairwiseOnDemand]: 151/160 looper letters, 0 selfloop transitions, 0 changer transitions 5/141 dead transitions. [2021-11-09 08:32:30,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 141 transitions, 294 flow [2021-11-09 08:32:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:32:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 08:32:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 309 transitions. [2021-11-09 08:32:30,290 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.965625 [2021-11-09 08:32:30,290 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 309 transitions. [2021-11-09 08:32:30,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 309 transitions. [2021-11-09 08:32:30,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:30,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 309 transitions. [2021-11-09 08:32:30,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,313 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,315 INFO L186 Difference]: Start difference. First operand has 144 places, 150 transitions, 312 flow. Second operand 2 states and 309 transitions. [2021-11-09 08:32:30,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 141 transitions, 294 flow [2021-11-09 08:32:30,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 141 transitions, 286 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-09 08:32:30,324 INFO L242 Difference]: Finished difference. Result has 141 places, 136 transitions, 276 flow [2021-11-09 08:32:30,326 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=276, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2021-11-09 08:32:30,327 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, -3 predicate places. [2021-11-09 08:32:30,327 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 276 flow [2021-11-09 08:32:30,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 151.5) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:30,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:30,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:32:30,329 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash 229149989, now seen corresponding path program 1 times [2021-11-09 08:32:30,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:30,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977903542] [2021-11-09 08:32:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:30,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:30,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:30,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977903542] [2021-11-09 08:32:30,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977903542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:30,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:30,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:32:30,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714869958] [2021-11-09 08:32:30,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:32:30,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:32:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:32:30,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 160 [2021-11-09 08:32:30,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:30,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 160 [2021-11-09 08:32:30,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:30,897 INFO L129 PetriNetUnfolder]: 91/352 cut-off events. [2021-11-09 08:32:30,897 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 08:32:30,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 352 events. 91/352 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1199 event pairs, 39 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 553. Up to 105 conditions per place. [2021-11-09 08:32:30,902 INFO L132 encePairwiseOnDemand]: 153/160 looper letters, 51 selfloop transitions, 5 changer transitions 3/161 dead transitions. [2021-11-09 08:32:30,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 161 transitions, 444 flow [2021-11-09 08:32:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:32:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 08:32:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 726 transitions. [2021-11-09 08:32:30,906 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75625 [2021-11-09 08:32:30,906 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 726 transitions. [2021-11-09 08:32:30,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 726 transitions. [2021-11-09 08:32:30,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:30,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 726 transitions. [2021-11-09 08:32:30,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,916 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,916 INFO L186 Difference]: Start difference. First operand has 141 places, 136 transitions, 276 flow. Second operand 6 states and 726 transitions. [2021-11-09 08:32:30,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 161 transitions, 444 flow [2021-11-09 08:32:30,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 161 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 08:32:30,922 INFO L242 Difference]: Finished difference. Result has 144 places, 139 transitions, 305 flow [2021-11-09 08:32:30,922 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=144, PETRI_TRANSITIONS=139} [2021-11-09 08:32:30,923 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 0 predicate places. [2021-11-09 08:32:30,923 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 139 transitions, 305 flow [2021-11-09 08:32:30,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:30,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:30,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:30,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:32:30,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:30,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1909569313, now seen corresponding path program 1 times [2021-11-09 08:32:30,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:30,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968533133] [2021-11-09 08:32:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:30,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:31,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:31,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968533133] [2021-11-09 08:32:31,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968533133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:31,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:31,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:32:31,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481250548] [2021-11-09 08:32:31,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:32:31,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:31,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:32:31,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:32:31,063 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 160 [2021-11-09 08:32:31,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 139 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:31,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 160 [2021-11-09 08:32:31,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:31,211 INFO L129 PetriNetUnfolder]: 93/381 cut-off events. [2021-11-09 08:32:31,211 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-11-09 08:32:31,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 381 events. 93/381 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1294 event pairs, 13 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 639. Up to 86 conditions per place. [2021-11-09 08:32:31,217 INFO L132 encePairwiseOnDemand]: 152/160 looper letters, 40 selfloop transitions, 8 changer transitions 0/167 dead transitions. [2021-11-09 08:32:31,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 167 transitions, 467 flow [2021-11-09 08:32:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:32:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 08:32:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 849 transitions. [2021-11-09 08:32:31,225 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.884375 [2021-11-09 08:32:31,225 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 849 transitions. [2021-11-09 08:32:31,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 849 transitions. [2021-11-09 08:32:31,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:31,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 849 transitions. [2021-11-09 08:32:31,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,236 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,236 INFO L186 Difference]: Start difference. First operand has 144 places, 139 transitions, 305 flow. Second operand 6 states and 849 transitions. [2021-11-09 08:32:31,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 167 transitions, 467 flow [2021-11-09 08:32:31,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 167 transitions, 463 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-09 08:32:31,243 INFO L242 Difference]: Finished difference. Result has 148 places, 142 transitions, 346 flow [2021-11-09 08:32:31,243 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=148, PETRI_TRANSITIONS=142} [2021-11-09 08:32:31,244 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 4 predicate places. [2021-11-09 08:32:31,244 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 142 transitions, 346 flow [2021-11-09 08:32:31,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,245 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:31,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:31,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:32:31,246 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1455657459, now seen corresponding path program 2 times [2021-11-09 08:32:31,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:31,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576953453] [2021-11-09 08:32:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:31,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:31,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:31,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576953453] [2021-11-09 08:32:31,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576953453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:31,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:31,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:32:31,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274692613] [2021-11-09 08:32:31,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:32:31,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:31,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:32:31,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:31,444 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 160 [2021-11-09 08:32:31,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 142 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:31,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 160 [2021-11-09 08:32:31,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:31,555 INFO L129 PetriNetUnfolder]: 91/364 cut-off events. [2021-11-09 08:32:31,555 INFO L130 PetriNetUnfolder]: For 163/203 co-relation queries the response was YES. [2021-11-09 08:32:31,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 364 events. 91/364 cut-off events. For 163/203 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1188 event pairs, 37 based on Foata normal form. 5/363 useless extension candidates. Maximal degree in co-relation 719. Up to 119 conditions per place. [2021-11-09 08:32:31,562 INFO L132 encePairwiseOnDemand]: 150/160 looper letters, 30 selfloop transitions, 7 changer transitions 4/160 dead transitions. [2021-11-09 08:32:31,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 160 transitions, 496 flow [2021-11-09 08:32:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-09 08:32:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2021-11-09 08:32:31,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.88125 [2021-11-09 08:32:31,566 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2021-11-09 08:32:31,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2021-11-09 08:32:31,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:31,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2021-11-09 08:32:31,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,573 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,573 INFO L186 Difference]: Start difference. First operand has 148 places, 142 transitions, 346 flow. Second operand 5 states and 705 transitions. [2021-11-09 08:32:31,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 160 transitions, 496 flow [2021-11-09 08:32:31,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 160 transitions, 484 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-11-09 08:32:31,580 INFO L242 Difference]: Finished difference. Result has 151 places, 142 transitions, 363 flow [2021-11-09 08:32:31,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=151, PETRI_TRANSITIONS=142} [2021-11-09 08:32:31,581 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 7 predicate places. [2021-11-09 08:32:31,581 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 142 transitions, 363 flow [2021-11-09 08:32:31,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,582 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:31,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:31,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:32:31,583 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:31,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2073602375, now seen corresponding path program 1 times [2021-11-09 08:32:31,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:31,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195515296] [2021-11-09 08:32:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:31,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:31,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:31,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195515296] [2021-11-09 08:32:31,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195515296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:31,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:31,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:32:31,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490213888] [2021-11-09 08:32:31,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:32:31,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:32:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:32:31,761 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 160 [2021-11-09 08:32:31,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 142 transitions, 363 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:31,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 160 [2021-11-09 08:32:31,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:31,873 INFO L129 PetriNetUnfolder]: 84/316 cut-off events. [2021-11-09 08:32:31,873 INFO L130 PetriNetUnfolder]: For 211/238 co-relation queries the response was YES. [2021-11-09 08:32:31,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 316 events. 84/316 cut-off events. For 211/238 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 861 event pairs, 42 based on Foata normal form. 12/323 useless extension candidates. Maximal degree in co-relation 657. Up to 119 conditions per place. [2021-11-09 08:32:31,876 INFO L132 encePairwiseOnDemand]: 153/160 looper letters, 28 selfloop transitions, 7 changer transitions 0/154 dead transitions. [2021-11-09 08:32:31,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 475 flow [2021-11-09 08:32:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:32:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 08:32:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 833 transitions. [2021-11-09 08:32:31,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8677083333333333 [2021-11-09 08:32:31,880 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 833 transitions. [2021-11-09 08:32:31,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 833 transitions. [2021-11-09 08:32:31,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:31,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 833 transitions. [2021-11-09 08:32:31,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.83333333333334) internal successors, (833), 6 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,889 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,890 INFO L186 Difference]: Start difference. First operand has 151 places, 142 transitions, 363 flow. Second operand 6 states and 833 transitions. [2021-11-09 08:32:31,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 475 flow [2021-11-09 08:32:31,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 154 transitions, 449 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-09 08:32:31,899 INFO L242 Difference]: Finished difference. Result has 152 places, 142 transitions, 357 flow [2021-11-09 08:32:31,899 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=152, PETRI_TRANSITIONS=142} [2021-11-09 08:32:31,900 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 8 predicate places. [2021-11-09 08:32:31,900 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 142 transitions, 357 flow [2021-11-09 08:32:31,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:31,901 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:31,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:31,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:32:31,901 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1391059987, now seen corresponding path program 1 times [2021-11-09 08:32:31,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:31,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187537375] [2021-11-09 08:32:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:31,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:32:32,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:32,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187537375] [2021-11-09 08:32:32,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187537375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:32,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:32,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:32:32,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487688026] [2021-11-09 08:32:32,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:32:32,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:32,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:32:32,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:32:32,024 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 160 [2021-11-09 08:32:32,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 142 transitions, 357 flow. Second operand has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:32,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 160 [2021-11-09 08:32:32,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:32,159 INFO L129 PetriNetUnfolder]: 21/266 cut-off events. [2021-11-09 08:32:32,159 INFO L130 PetriNetUnfolder]: For 60/63 co-relation queries the response was YES. [2021-11-09 08:32:32,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 266 events. 21/266 cut-off events. For 60/63 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 523 event pairs, 4 based on Foata normal form. 4/262 useless extension candidates. Maximal degree in co-relation 418. Up to 29 conditions per place. [2021-11-09 08:32:32,161 INFO L132 encePairwiseOnDemand]: 149/160 looper letters, 26 selfloop transitions, 8 changer transitions 13/159 dead transitions. [2021-11-09 08:32:32,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 159 transitions, 485 flow [2021-11-09 08:32:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:32:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-09 08:32:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1145 transitions. [2021-11-09 08:32:32,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7951388888888888 [2021-11-09 08:32:32,166 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1145 transitions. [2021-11-09 08:32:32,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1145 transitions. [2021-11-09 08:32:32,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:32,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1145 transitions. [2021-11-09 08:32:32,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.22222222222223) internal successors, (1145), 9 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 160.0) internal successors, (1600), 10 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,177 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 160.0) internal successors, (1600), 10 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,177 INFO L186 Difference]: Start difference. First operand has 152 places, 142 transitions, 357 flow. Second operand 9 states and 1145 transitions. [2021-11-09 08:32:32,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 159 transitions, 485 flow [2021-11-09 08:32:32,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 159 transitions, 469 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-09 08:32:32,183 INFO L242 Difference]: Finished difference. Result has 157 places, 143 transitions, 371 flow [2021-11-09 08:32:32,183 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=371, PETRI_PLACES=157, PETRI_TRANSITIONS=143} [2021-11-09 08:32:32,183 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 13 predicate places. [2021-11-09 08:32:32,183 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 143 transitions, 371 flow [2021-11-09 08:32:32,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:32,184 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:32,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:32:32,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:32,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash 202270448, now seen corresponding path program 1 times [2021-11-09 08:32:32,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:32,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614584214] [2021-11-09 08:32:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:32,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:32:32,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:32,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614584214] [2021-11-09 08:32:32,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614584214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:32,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:32,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:32:32,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466313555] [2021-11-09 08:32:32,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:32:32,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:32:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:32:32,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 160 [2021-11-09 08:32:32,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 143 transitions, 371 flow. Second operand has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:32,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 160 [2021-11-09 08:32:32,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:32,428 INFO L129 PetriNetUnfolder]: 21/255 cut-off events. [2021-11-09 08:32:32,428 INFO L130 PetriNetUnfolder]: For 62/65 co-relation queries the response was YES. [2021-11-09 08:32:32,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 255 events. 21/255 cut-off events. For 62/65 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 489 event pairs, 7 based on Foata normal form. 4/251 useless extension candidates. Maximal degree in co-relation 417. Up to 27 conditions per place. [2021-11-09 08:32:32,430 INFO L132 encePairwiseOnDemand]: 151/160 looper letters, 29 selfloop transitions, 6 changer transitions 1/148 dead transitions. [2021-11-09 08:32:32,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 148 transitions, 453 flow [2021-11-09 08:32:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:32:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 08:32:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 889 transitions. [2021-11-09 08:32:32,434 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.79375 [2021-11-09 08:32:32,434 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 889 transitions. [2021-11-09 08:32:32,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 889 transitions. [2021-11-09 08:32:32,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:32,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 889 transitions. [2021-11-09 08:32:32,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,442 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,442 INFO L186 Difference]: Start difference. First operand has 157 places, 143 transitions, 371 flow. Second operand 7 states and 889 transitions. [2021-11-09 08:32:32,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 148 transitions, 453 flow [2021-11-09 08:32:32,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 148 transitions, 439 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-09 08:32:32,448 INFO L242 Difference]: Finished difference. Result has 158 places, 144 transitions, 381 flow [2021-11-09 08:32:32,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2021-11-09 08:32:32,449 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 14 predicate places. [2021-11-09 08:32:32,449 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 381 flow [2021-11-09 08:32:32,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:32,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:32,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:32,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:32:32,451 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1506910744, now seen corresponding path program 1 times [2021-11-09 08:32:32,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:32,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351922524] [2021-11-09 08:32:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:32,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:36,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:36,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351922524] [2021-11-09 08:32:36,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351922524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:36,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899026289] [2021-11-09 08:32:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:36,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:36,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:36,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:36,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:32:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:36,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 08:32:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:41,508 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-11-09 08:32:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 38 [2021-11-09 08:32:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:42,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899026289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:42,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:42,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 78 [2021-11-09 08:32:42,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24280425] [2021-11-09 08:32:42,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 08:32:42,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 08:32:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=5557, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:32:42,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 160 [2021-11-09 08:32:42,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 144 transitions, 381 flow. Second operand has 78 states, 78 states have (on average 50.34615384615385) internal successors, (3927), 78 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:42,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:32:42,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 160 [2021-11-09 08:32:42,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:32:53,095 INFO L129 PetriNetUnfolder]: 716/1612 cut-off events. [2021-11-09 08:32:53,095 INFO L130 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2021-11-09 08:32:53,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3989 conditions, 1612 events. 716/1612 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9142 event pairs, 35 based on Foata normal form. 35/1642 useless extension candidates. Maximal degree in co-relation 3974. Up to 391 conditions per place. [2021-11-09 08:32:53,112 INFO L132 encePairwiseOnDemand]: 107/160 looper letters, 263 selfloop transitions, 122 changer transitions 12/436 dead transitions. [2021-11-09 08:32:53,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 436 transitions, 2105 flow [2021-11-09 08:32:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-09 08:32:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-11-09 08:32:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4338 transitions. [2021-11-09 08:32:53,132 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.330640243902439 [2021-11-09 08:32:53,133 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4338 transitions. [2021-11-09 08:32:53,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4338 transitions. [2021-11-09 08:32:53,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:53,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4338 transitions. [2021-11-09 08:32:53,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 52.90243902439025) internal successors, (4338), 82 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:53,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 160.0) internal successors, (13280), 83 states have internal predecessors, (13280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:53,183 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 160.0) internal successors, (13280), 83 states have internal predecessors, (13280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:53,183 INFO L186 Difference]: Start difference. First operand has 158 places, 144 transitions, 381 flow. Second operand 82 states and 4338 transitions. [2021-11-09 08:32:53,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 436 transitions, 2105 flow [2021-11-09 08:32:53,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 436 transitions, 2043 flow, removed 23 selfloop flow, removed 4 redundant places. [2021-11-09 08:32:53,208 INFO L242 Difference]: Finished difference. Result has 285 places, 250 transitions, 1279 flow [2021-11-09 08:32:53,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=1279, PETRI_PLACES=285, PETRI_TRANSITIONS=250} [2021-11-09 08:32:53,209 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 141 predicate places. [2021-11-09 08:32:53,209 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 250 transitions, 1279 flow [2021-11-09 08:32:53,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 50.34615384615385) internal successors, (3927), 78 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:53,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:32:53,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:53,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:53,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:53,435 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:32:53,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:53,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2047180350, now seen corresponding path program 2 times [2021-11-09 08:32:53,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:53,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584124875] [2021-11-09 08:32:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:53,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:56,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:56,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584124875] [2021-11-09 08:32:56,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584124875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:56,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422505518] [2021-11-09 08:32:56,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:32:56,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:56,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:56,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:56,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:32:57,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:32:57,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 08:32:57,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:01,546 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-09 08:33:01,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 30 [2021-11-09 08:33:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:01,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422505518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:01,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:01,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36] total 73 [2021-11-09 08:33:01,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179471952] [2021-11-09 08:33:01,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-09 08:33:01,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:02,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-09 08:33:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=4859, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:33:02,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 160 [2021-11-09 08:33:02,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 250 transitions, 1279 flow. Second operand has 73 states, 73 states have (on average 50.50684931506849) internal successors, (3687), 73 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:02,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:33:02,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 160 [2021-11-09 08:33:02,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:33:12,711 INFO L129 PetriNetUnfolder]: 1082/2356 cut-off events. [2021-11-09 08:33:12,712 INFO L130 PetriNetUnfolder]: For 8123/8126 co-relation queries the response was YES. [2021-11-09 08:33:12,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9242 conditions, 2356 events. 1082/2356 cut-off events. For 8123/8126 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15275 event pairs, 173 based on Foata normal form. 14/2350 useless extension candidates. Maximal degree in co-relation 9176. Up to 983 conditions per place. [2021-11-09 08:33:12,766 INFO L132 encePairwiseOnDemand]: 107/160 looper letters, 279 selfloop transitions, 119 changer transitions 23/460 dead transitions. [2021-11-09 08:33:12,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 460 transitions, 3272 flow [2021-11-09 08:33:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 08:33:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-11-09 08:33:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3749 transitions. [2021-11-09 08:33:12,778 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.33001760563380284 [2021-11-09 08:33:12,779 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3749 transitions. [2021-11-09 08:33:12,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3749 transitions. [2021-11-09 08:33:12,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:33:12,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3749 transitions. [2021-11-09 08:33:12,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 52.80281690140845) internal successors, (3749), 71 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:12,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 160.0) internal successors, (11520), 72 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:12,834 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 160.0) internal successors, (11520), 72 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:12,839 INFO L186 Difference]: Start difference. First operand has 285 places, 250 transitions, 1279 flow. Second operand 71 states and 3749 transitions. [2021-11-09 08:33:12,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 460 transitions, 3272 flow [2021-11-09 08:33:12,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 460 transitions, 3023 flow, removed 99 selfloop flow, removed 16 redundant places. [2021-11-09 08:33:12,900 INFO L242 Difference]: Finished difference. Result has 358 places, 290 transitions, 1766 flow [2021-11-09 08:33:12,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=1766, PETRI_PLACES=358, PETRI_TRANSITIONS=290} [2021-11-09 08:33:12,901 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 214 predicate places. [2021-11-09 08:33:12,901 INFO L470 AbstractCegarLoop]: Abstraction has has 358 places, 290 transitions, 1766 flow [2021-11-09 08:33:12,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 50.50684931506849) internal successors, (3687), 73 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:12,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:33:12,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:12,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:13,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:13,115 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:33:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash 422242140, now seen corresponding path program 3 times [2021-11-09 08:33:13,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:13,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114498133] [2021-11-09 08:33:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:13,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:16,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:16,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114498133] [2021-11-09 08:33:16,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114498133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:16,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605427821] [2021-11-09 08:33:16,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:33:16,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:16,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:16,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:16,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:33:17,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:33:17,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:17,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-09 08:33:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:17,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:33:17,449 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:33:17,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:33:18,596 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-09 08:33:18,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-09 08:33:19,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:33:21,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:21,143 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-09 08:33:21,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 08:33:21,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:33:22,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 08:33:23,229 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:33:23,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-11-09 08:33:24,652 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 08:33:24,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 34 [2021-11-09 08:33:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:25,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605427821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:25,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:25,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 45] total 84 [2021-11-09 08:33:25,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183927248] [2021-11-09 08:33:25,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-09 08:33:25,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-09 08:33:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=6525, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 08:33:25,084 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 160 [2021-11-09 08:33:25,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 290 transitions, 1766 flow. Second operand has 84 states, 84 states have (on average 40.273809523809526) internal successors, (3383), 84 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:25,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:33:25,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 160 [2021-11-09 08:33:25,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:33:39,279 INFO L129 PetriNetUnfolder]: 1476/3173 cut-off events. [2021-11-09 08:33:39,280 INFO L130 PetriNetUnfolder]: For 14119/14122 co-relation queries the response was YES. [2021-11-09 08:33:39,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13310 conditions, 3173 events. 1476/3173 cut-off events. For 14119/14122 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22477 event pairs, 195 based on Foata normal form. 5/3137 useless extension candidates. Maximal degree in co-relation 13228. Up to 1307 conditions per place. [2021-11-09 08:33:39,362 INFO L132 encePairwiseOnDemand]: 106/160 looper letters, 301 selfloop transitions, 176 changer transitions 10/520 dead transitions. [2021-11-09 08:33:39,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 520 transitions, 4193 flow [2021-11-09 08:33:39,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-09 08:33:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-11-09 08:33:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 3403 transitions. [2021-11-09 08:33:39,386 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.265859375 [2021-11-09 08:33:39,387 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 3403 transitions. [2021-11-09 08:33:39,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 3403 transitions. [2021-11-09 08:33:39,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:33:39,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 3403 transitions. [2021-11-09 08:33:39,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 42.5375) internal successors, (3403), 80 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:39,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 160.0) internal successors, (12960), 81 states have internal predecessors, (12960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:39,439 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 160.0) internal successors, (12960), 81 states have internal predecessors, (12960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:39,439 INFO L186 Difference]: Start difference. First operand has 358 places, 290 transitions, 1766 flow. Second operand 80 states and 3403 transitions. [2021-11-09 08:33:39,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 520 transitions, 4193 flow [2021-11-09 08:33:39,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 520 transitions, 4021 flow, removed 36 selfloop flow, removed 48 redundant places. [2021-11-09 08:33:39,637 INFO L242 Difference]: Finished difference. Result has 401 places, 352 transitions, 2625 flow [2021-11-09 08:33:39,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=2625, PETRI_PLACES=401, PETRI_TRANSITIONS=352} [2021-11-09 08:33:39,639 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 257 predicate places. [2021-11-09 08:33:39,639 INFO L470 AbstractCegarLoop]: Abstraction has has 401 places, 352 transitions, 2625 flow [2021-11-09 08:33:39,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 40.273809523809526) internal successors, (3383), 84 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:39,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:33:39,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:39,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:39,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:33:39,847 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:33:39,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:39,847 INFO L85 PathProgramCache]: Analyzing trace with hash -15653550, now seen corresponding path program 4 times [2021-11-09 08:33:39,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:39,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657071704] [2021-11-09 08:33:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:39,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:43,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:43,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657071704] [2021-11-09 08:33:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657071704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:43,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314959395] [2021-11-09 08:33:43,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:33:43,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:43,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:43,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:43,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:33:44,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:33:44,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 08:33:44,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:48,636 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-11-09 08:33:48,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2021-11-09 08:33:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:49,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314959395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:49,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:49,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 78 [2021-11-09 08:33:49,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231154279] [2021-11-09 08:33:49,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 08:33:49,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 08:33:49,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=5622, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:33:49,381 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 160 [2021-11-09 08:33:49,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 352 transitions, 2625 flow. Second operand has 78 states, 78 states have (on average 50.34615384615385) internal successors, (3927), 78 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:49,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:33:49,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 160 [2021-11-09 08:33:49,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:34:05,547 INFO L129 PetriNetUnfolder]: 1868/3977 cut-off events. [2021-11-09 08:34:05,547 INFO L130 PetriNetUnfolder]: For 29685/29688 co-relation queries the response was YES. [2021-11-09 08:34:05,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19573 conditions, 3977 events. 1868/3977 cut-off events. For 29685/29688 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29932 event pairs, 334 based on Foata normal form. 7/3946 useless extension candidates. Maximal degree in co-relation 19476. Up to 1686 conditions per place. [2021-11-09 08:34:05,652 INFO L132 encePairwiseOnDemand]: 108/160 looper letters, 355 selfloop transitions, 198 changer transitions 15/607 dead transitions. [2021-11-09 08:34:05,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 607 transitions, 5758 flow [2021-11-09 08:34:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-09 08:34:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-11-09 08:34:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 4474 transitions. [2021-11-09 08:34:05,665 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3289705882352941 [2021-11-09 08:34:05,665 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 4474 transitions. [2021-11-09 08:34:05,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 4474 transitions. [2021-11-09 08:34:05,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:34:05,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 4474 transitions. [2021-11-09 08:34:05,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 52.63529411764706) internal successors, (4474), 85 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:05,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 160.0) internal successors, (13760), 86 states have internal predecessors, (13760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:05,758 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 160.0) internal successors, (13760), 86 states have internal predecessors, (13760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:05,759 INFO L186 Difference]: Start difference. First operand has 401 places, 352 transitions, 2625 flow. Second operand 85 states and 4474 transitions. [2021-11-09 08:34:05,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 607 transitions, 5758 flow [2021-11-09 08:34:05,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 607 transitions, 5478 flow, removed 76 selfloop flow, removed 50 redundant places. [2021-11-09 08:34:06,002 INFO L242 Difference]: Finished difference. Result has 454 places, 429 transitions, 3814 flow [2021-11-09 08:34:06,003 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=3814, PETRI_PLACES=454, PETRI_TRANSITIONS=429} [2021-11-09 08:34:06,004 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 310 predicate places. [2021-11-09 08:34:06,004 INFO L470 AbstractCegarLoop]: Abstraction has has 454 places, 429 transitions, 3814 flow [2021-11-09 08:34:06,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 50.34615384615385) internal successors, (3927), 78 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:06,005 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:34:06,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:06,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:06,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:34:06,206 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:34:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1897060426, now seen corresponding path program 5 times [2021-11-09 08:34:06,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:06,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816635049] [2021-11-09 08:34:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:06,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:10,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:10,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816635049] [2021-11-09 08:34:10,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816635049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:10,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499595343] [2021-11-09 08:34:10,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:34:10,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:10,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:10,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:10,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:34:11,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 08:34:11,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:11,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-09 08:34:11,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:11,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:34:12,998 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:34:12,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 08:34:13,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:34:15,231 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 08:34:15,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 08:34:15,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-09 08:34:16,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:34:17,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 08:34:18,401 INFO L354 Elim1Store]: treesize reduction 33, result has 42.1 percent of original size [2021-11-09 08:34:18,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 57 [2021-11-09 08:34:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:19,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499595343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:19,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:19,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 43] total 80 [2021-11-09 08:34:19,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078018677] [2021-11-09 08:34:19,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 08:34:19,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 08:34:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=5972, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 08:34:19,342 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 160 [2021-11-09 08:34:19,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 429 transitions, 3814 flow. Second operand has 80 states, 80 states have (on average 40.3875) internal successors, (3231), 80 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:19,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:34:19,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 160 [2021-11-09 08:34:19,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:34:42,275 INFO L129 PetriNetUnfolder]: 2330/4888 cut-off events. [2021-11-09 08:34:42,275 INFO L130 PetriNetUnfolder]: For 53332/53335 co-relation queries the response was YES. [2021-11-09 08:34:42,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26988 conditions, 4888 events. 2330/4888 cut-off events. For 53332/53335 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38853 event pairs, 458 based on Foata normal form. 13/4864 useless extension candidates. Maximal degree in co-relation 26871. Up to 2776 conditions per place. [2021-11-09 08:34:42,377 INFO L132 encePairwiseOnDemand]: 105/160 looper letters, 408 selfloop transitions, 256 changer transitions 11/708 dead transitions. [2021-11-09 08:34:42,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 708 transitions, 7381 flow [2021-11-09 08:34:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-09 08:34:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-11-09 08:34:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 4306 transitions. [2021-11-09 08:34:42,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2638480392156863 [2021-11-09 08:34:42,389 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 4306 transitions. [2021-11-09 08:34:42,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 4306 transitions. [2021-11-09 08:34:42,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:34:42,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 4306 transitions. [2021-11-09 08:34:42,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 42.21568627450981) internal successors, (4306), 102 states have internal predecessors, (4306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:42,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 160.0) internal successors, (16480), 103 states have internal predecessors, (16480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:42,430 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 160.0) internal successors, (16480), 103 states have internal predecessors, (16480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:42,430 INFO L186 Difference]: Start difference. First operand has 454 places, 429 transitions, 3814 flow. Second operand 102 states and 4306 transitions. [2021-11-09 08:34:42,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 708 transitions, 7381 flow [2021-11-09 08:34:42,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 708 transitions, 6696 flow, removed 269 selfloop flow, removed 52 redundant places. [2021-11-09 08:34:42,946 INFO L242 Difference]: Finished difference. Result has 518 places, 535 transitions, 5043 flow [2021-11-09 08:34:42,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=5043, PETRI_PLACES=518, PETRI_TRANSITIONS=535} [2021-11-09 08:34:42,947 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 374 predicate places. [2021-11-09 08:34:42,948 INFO L470 AbstractCegarLoop]: Abstraction has has 518 places, 535 transitions, 5043 flow [2021-11-09 08:34:42,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 40.3875) internal successors, (3231), 80 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:42,949 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:34:42,949 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:43,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:43,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 08:34:43,163 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:34:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1469167032, now seen corresponding path program 6 times [2021-11-09 08:34:43,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:43,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340199443] [2021-11-09 08:34:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:43,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:46,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:46,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340199443] [2021-11-09 08:34:46,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340199443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:46,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898085400] [2021-11-09 08:34:46,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:34:46,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:46,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:46,773 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:46,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:34:48,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 08:34:48,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:48,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 08:34:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:52,873 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-11-09 08:34:52,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2021-11-09 08:34:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:53,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898085400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:53,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:53,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 78 [2021-11-09 08:34:53,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911580936] [2021-11-09 08:34:53,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 08:34:53,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 08:34:53,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=5578, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:34:53,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 160 [2021-11-09 08:34:53,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 535 transitions, 5043 flow. Second operand has 78 states, 78 states have (on average 50.34615384615385) internal successors, (3927), 78 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:53,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:34:53,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 160 [2021-11-09 08:34:53,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:35:05,639 INFO L129 PetriNetUnfolder]: 2816/5886 cut-off events. [2021-11-09 08:35:05,639 INFO L130 PetriNetUnfolder]: For 81012/81015 co-relation queries the response was YES. [2021-11-09 08:35:05,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34362 conditions, 5886 events. 2816/5886 cut-off events. For 81012/81015 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 49026 event pairs, 518 based on Foata normal form. 32/5873 useless extension candidates. Maximal degree in co-relation 34229. Up to 2972 conditions per place. [2021-11-09 08:35:05,773 INFO L132 encePairwiseOnDemand]: 107/160 looper letters, 500 selfloop transitions, 221 changer transitions 28/788 dead transitions. [2021-11-09 08:35:05,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 788 transitions, 8644 flow [2021-11-09 08:35:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-09 08:35:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-11-09 08:35:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4417 transitions. [2021-11-09 08:35:05,786 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.32864583333333336 [2021-11-09 08:35:05,787 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4417 transitions. [2021-11-09 08:35:05,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4417 transitions. [2021-11-09 08:35:05,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:35:05,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4417 transitions. [2021-11-09 08:35:05,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 52.583333333333336) internal successors, (4417), 84 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:05,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 160.0) internal successors, (13600), 85 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:05,823 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 160.0) internal successors, (13600), 85 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:05,823 INFO L186 Difference]: Start difference. First operand has 518 places, 535 transitions, 5043 flow. Second operand 84 states and 4417 transitions. [2021-11-09 08:35:05,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 788 transitions, 8644 flow [2021-11-09 08:35:06,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 788 transitions, 8051 flow, removed 201 selfloop flow, removed 65 redundant places. [2021-11-09 08:35:06,575 INFO L242 Difference]: Finished difference. Result has 546 places, 589 transitions, 5631 flow [2021-11-09 08:35:06,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=5631, PETRI_PLACES=546, PETRI_TRANSITIONS=589} [2021-11-09 08:35:06,577 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 402 predicate places. [2021-11-09 08:35:06,577 INFO L470 AbstractCegarLoop]: Abstraction has has 546 places, 589 transitions, 5631 flow [2021-11-09 08:35:06,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 50.34615384615385) internal successors, (3927), 78 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:06,578 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:35:06,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:06,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 08:35:06,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:35:06,796 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:35:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -92813690, now seen corresponding path program 7 times [2021-11-09 08:35:06,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:06,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801538732] [2021-11-09 08:35:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:06,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:10,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:10,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801538732] [2021-11-09 08:35:10,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801538732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:10,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873421578] [2021-11-09 08:35:10,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:35:10,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:10,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:10,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:35:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 08:35:12,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:16,535 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-11-09 08:35:16,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2021-11-09 08:35:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:17,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873421578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:17,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:17,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 78 [2021-11-09 08:35:17,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608071166] [2021-11-09 08:35:17,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 08:35:17,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:17,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 08:35:17,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=5571, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:35:17,132 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 160 [2021-11-09 08:35:17,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 589 transitions, 5631 flow. Second operand has 78 states, 78 states have (on average 50.34615384615385) internal successors, (3927), 78 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:17,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:35:17,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 160 [2021-11-09 08:35:17,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:35:30,382 INFO L129 PetriNetUnfolder]: 3125/6482 cut-off events. [2021-11-09 08:35:30,382 INFO L130 PetriNetUnfolder]: For 118615/118618 co-relation queries the response was YES. [2021-11-09 08:35:30,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41179 conditions, 6482 events. 3125/6482 cut-off events. For 118615/118618 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 54690 event pairs, 573 based on Foata normal form. 24/6460 useless extension candidates. Maximal degree in co-relation 41036. Up to 2392 conditions per place. [2021-11-09 08:35:30,605 INFO L132 encePairwiseOnDemand]: 107/160 looper letters, 454 selfloop transitions, 330 changer transitions 28/851 dead transitions. [2021-11-09 08:35:30,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 851 transitions, 9709 flow [2021-11-09 08:35:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 08:35:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-11-09 08:35:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 4676 transitions. [2021-11-09 08:35:30,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3283707865168539 [2021-11-09 08:35:30,616 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 4676 transitions. [2021-11-09 08:35:30,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 4676 transitions. [2021-11-09 08:35:30,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:35:30,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 4676 transitions. [2021-11-09 08:35:30,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 52.53932584269663) internal successors, (4676), 89 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:30,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 160.0) internal successors, (14400), 90 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:30,647 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 160.0) internal successors, (14400), 90 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:30,647 INFO L186 Difference]: Start difference. First operand has 546 places, 589 transitions, 5631 flow. Second operand 89 states and 4676 transitions. [2021-11-09 08:35:30,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 851 transitions, 9709 flow [2021-11-09 08:35:31,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 851 transitions, 9174 flow, removed 169 selfloop flow, removed 62 redundant places. [2021-11-09 08:35:31,493 INFO L242 Difference]: Finished difference. Result has 582 places, 641 transitions, 6813 flow [2021-11-09 08:35:31,494 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=5211, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=6813, PETRI_PLACES=582, PETRI_TRANSITIONS=641} [2021-11-09 08:35:31,494 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 438 predicate places. [2021-11-09 08:35:31,494 INFO L470 AbstractCegarLoop]: Abstraction has has 582 places, 641 transitions, 6813 flow [2021-11-09 08:35:31,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 50.34615384615385) internal successors, (3927), 78 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:31,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:35:31,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:31,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:31,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:35:31,696 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:35:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash 139250790, now seen corresponding path program 8 times [2021-11-09 08:35:31,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:31,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665861379] [2021-11-09 08:35:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:31,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:34,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:34,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665861379] [2021-11-09 08:35:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665861379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:34,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004585151] [2021-11-09 08:35:34,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:34,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:34,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:34,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:34,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:35:37,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:37,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-09 08:35:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:40,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:35:41,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:35:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:35:42,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:42,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2021-11-09 08:35:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:43,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004585151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:43,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:43,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 45] total 82 [2021-11-09 08:35:43,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706551011] [2021-11-09 08:35:43,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-09 08:35:43,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-09 08:35:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=6179, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 08:35:43,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 160 [2021-11-09 08:35:43,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 641 transitions, 6813 flow. Second operand has 82 states, 82 states have (on average 41.31707317073171) internal successors, (3388), 82 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:43,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:35:43,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 160 [2021-11-09 08:35:43,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:35:59,232 INFO L129 PetriNetUnfolder]: 3765/7953 cut-off events. [2021-11-09 08:35:59,232 INFO L130 PetriNetUnfolder]: For 190186/190189 co-relation queries the response was YES. [2021-11-09 08:35:59,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54740 conditions, 7953 events. 3765/7953 cut-off events. For 190186/190189 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 71316 event pairs, 693 based on Foata normal form. 7/7899 useless extension candidates. Maximal degree in co-relation 54585. Up to 2132 conditions per place. [2021-11-09 08:35:59,478 INFO L132 encePairwiseOnDemand]: 105/160 looper letters, 456 selfloop transitions, 417 changer transitions 6/913 dead transitions. [2021-11-09 08:35:59,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 913 transitions, 11336 flow [2021-11-09 08:35:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 08:35:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-11-09 08:35:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 3868 transitions. [2021-11-09 08:35:59,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.27162921348314606 [2021-11-09 08:35:59,489 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 3868 transitions. [2021-11-09 08:35:59,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 3868 transitions. [2021-11-09 08:35:59,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:35:59,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 3868 transitions. [2021-11-09 08:35:59,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 43.46067415730337) internal successors, (3868), 89 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:59,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 160.0) internal successors, (14400), 90 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:59,517 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 160.0) internal successors, (14400), 90 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:59,517 INFO L186 Difference]: Start difference. First operand has 582 places, 641 transitions, 6813 flow. Second operand 89 states and 3868 transitions. [2021-11-09 08:35:59,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 913 transitions, 11336 flow [2021-11-09 08:36:00,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 913 transitions, 10753 flow, removed 188 selfloop flow, removed 62 redundant places. [2021-11-09 08:36:00,687 INFO L242 Difference]: Finished difference. Result has 607 places, 715 transitions, 8267 flow [2021-11-09 08:36:00,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=8267, PETRI_PLACES=607, PETRI_TRANSITIONS=715} [2021-11-09 08:36:00,689 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 463 predicate places. [2021-11-09 08:36:00,689 INFO L470 AbstractCegarLoop]: Abstraction has has 607 places, 715 transitions, 8267 flow [2021-11-09 08:36:00,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 41.31707317073171) internal successors, (3388), 82 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:00,690 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:36:00,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:00,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 08:36:00,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:00,919 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:36:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1779074922, now seen corresponding path program 9 times [2021-11-09 08:36:00,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:00,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97559934] [2021-11-09 08:36:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:00,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:04,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:04,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97559934] [2021-11-09 08:36:04,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97559934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:04,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448587334] [2021-11-09 08:36:04,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:36:04,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:04,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:04,495 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:04,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:36:06,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:36:06,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-09 08:36:06,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:07,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:36:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:08,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-11-09 08:36:08,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:36:10,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:10,540 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:36:10,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-11-09 08:36:11,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:36:12,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 08:36:12,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 08:36:13,907 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-11-09 08:36:13,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 44 [2021-11-09 08:36:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:14,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448587334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:14,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:14,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 44] total 80 [2021-11-09 08:36:14,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38769438] [2021-11-09 08:36:14,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-09 08:36:14,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-09 08:36:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=5910, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 08:36:14,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 160 [2021-11-09 08:36:14,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 715 transitions, 8267 flow. Second operand has 80 states, 80 states have (on average 40.3875) internal successors, (3231), 80 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:14,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:36:14,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 160 [2021-11-09 08:36:14,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:36:36,905 INFO L129 PetriNetUnfolder]: 4657/9800 cut-off events. [2021-11-09 08:36:36,905 INFO L130 PetriNetUnfolder]: For 236669/236672 co-relation queries the response was YES. [2021-11-09 08:36:37,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68598 conditions, 9800 events. 4657/9800 cut-off events. For 236669/236672 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 91715 event pairs, 912 based on Foata normal form. 5/9718 useless extension candidates. Maximal degree in co-relation 68440. Up to 6198 conditions per place. [2021-11-09 08:36:37,355 INFO L132 encePairwiseOnDemand]: 106/160 looper letters, 734 selfloop transitions, 342 changer transitions 4/1113 dead transitions. [2021-11-09 08:36:37,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 1113 transitions, 14716 flow [2021-11-09 08:36:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-09 08:36:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-11-09 08:36:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 4104 transitions. [2021-11-09 08:36:37,367 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.26443298969072165 [2021-11-09 08:36:37,367 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 4104 transitions. [2021-11-09 08:36:37,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 4104 transitions. [2021-11-09 08:36:37,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:36:37,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 4104 transitions. [2021-11-09 08:36:37,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 42.30927835051546) internal successors, (4104), 97 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:37,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 160.0) internal successors, (15680), 98 states have internal predecessors, (15680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:37,402 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 160.0) internal successors, (15680), 98 states have internal predecessors, (15680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:37,402 INFO L186 Difference]: Start difference. First operand has 607 places, 715 transitions, 8267 flow. Second operand 97 states and 4104 transitions. [2021-11-09 08:36:37,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 1113 transitions, 14716 flow [2021-11-09 08:36:40,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1113 transitions, 13881 flow, removed 200 selfloop flow, removed 76 redundant places. [2021-11-09 08:36:40,119 INFO L242 Difference]: Finished difference. Result has 648 places, 926 transitions, 11401 flow [2021-11-09 08:36:40,120 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=7629, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=11401, PETRI_PLACES=648, PETRI_TRANSITIONS=926} [2021-11-09 08:36:40,120 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 504 predicate places. [2021-11-09 08:36:40,121 INFO L470 AbstractCegarLoop]: Abstraction has has 648 places, 926 transitions, 11401 flow [2021-11-09 08:36:40,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 40.3875) internal successors, (3231), 80 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:40,121 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:36:40,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:40,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:40,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:36:40,335 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:36:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1886753436, now seen corresponding path program 10 times [2021-11-09 08:36:40,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:40,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775670740] [2021-11-09 08:36:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:40,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:44,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:44,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775670740] [2021-11-09 08:36:44,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775670740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:44,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689212922] [2021-11-09 08:36:44,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:36:44,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:44,715 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:44,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:36:47,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:36:47,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:36:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-09 08:36:47,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:47,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:36:47,452 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:36:47,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:36:48,618 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-09 08:36:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-09 08:36:49,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:36:51,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:51,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:51,360 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-09 08:36:51,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 08:36:51,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:36:53,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 08:36:53,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 08:36:54,238 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 08:36:54,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2021-11-09 08:36:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:54,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689212922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:54,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:54,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 45] total 83 [2021-11-09 08:36:54,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002854090] [2021-11-09 08:36:54,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-09 08:36:54,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:54,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-09 08:36:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=6422, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 08:36:54,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 160 [2021-11-09 08:36:54,936 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 926 transitions, 11401 flow. Second operand has 83 states, 83 states have (on average 40.30120481927711) internal successors, (3345), 83 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:36:54,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:36:54,937 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 160 [2021-11-09 08:36:54,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:37:21,443 INFO L129 PetriNetUnfolder]: 5274/11113 cut-off events. [2021-11-09 08:37:21,443 INFO L130 PetriNetUnfolder]: For 270186/270189 co-relation queries the response was YES. [2021-11-09 08:37:21,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80259 conditions, 11113 events. 5274/11113 cut-off events. For 270186/270189 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 106828 event pairs, 964 based on Foata normal form. 8/11014 useless extension candidates. Maximal degree in co-relation 80081. Up to 5794 conditions per place. [2021-11-09 08:37:21,855 INFO L132 encePairwiseOnDemand]: 105/160 looper letters, 791 selfloop transitions, 375 changer transitions 11/1210 dead transitions. [2021-11-09 08:37:21,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 1210 transitions, 16968 flow [2021-11-09 08:37:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-09 08:37:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-11-09 08:37:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 4159 transitions. [2021-11-09 08:37:21,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2652423469387755 [2021-11-09 08:37:21,863 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 4159 transitions. [2021-11-09 08:37:21,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 4159 transitions. [2021-11-09 08:37:21,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:37:21,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 4159 transitions. [2021-11-09 08:37:21,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 42.43877551020408) internal successors, (4159), 98 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:21,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 160.0) internal successors, (15840), 99 states have internal predecessors, (15840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:21,890 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 160.0) internal successors, (15840), 99 states have internal predecessors, (15840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:21,891 INFO L186 Difference]: Start difference. First operand has 648 places, 926 transitions, 11401 flow. Second operand 98 states and 4159 transitions. [2021-11-09 08:37:21,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 1210 transitions, 16968 flow [2021-11-09 08:37:24,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 1210 transitions, 16364 flow, removed 181 selfloop flow, removed 63 redundant places. [2021-11-09 08:37:24,360 INFO L242 Difference]: Finished difference. Result has 699 places, 981 transitions, 12790 flow [2021-11-09 08:37:24,362 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=10850, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=12790, PETRI_PLACES=699, PETRI_TRANSITIONS=981} [2021-11-09 08:37:24,362 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 555 predicate places. [2021-11-09 08:37:24,362 INFO L470 AbstractCegarLoop]: Abstraction has has 699 places, 981 transitions, 12790 flow [2021-11-09 08:37:24,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 40.30120481927711) internal successors, (3345), 83 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:24,363 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:37:24,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:24,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-09 08:37:24,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:24,564 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:37:24,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1368992800, now seen corresponding path program 11 times [2021-11-09 08:37:24,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:24,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151824593] [2021-11-09 08:37:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:24,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:28,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:28,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151824593] [2021-11-09 08:37:28,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151824593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:28,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589864903] [2021-11-09 08:37:28,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:37:28,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:28,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:28,196 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:28,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:37:31,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:37:31,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 08:37:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:35,496 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-11-09 08:37:35,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 45 [2021-11-09 08:37:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:36,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589864903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:36,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:36,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 76 [2021-11-09 08:37:36,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006669281] [2021-11-09 08:37:36,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 08:37:36,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 08:37:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=5281, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:37:36,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 160 [2021-11-09 08:37:36,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 981 transitions, 12790 flow. Second operand has 76 states, 76 states have (on average 50.4078947368421) internal successors, (3831), 76 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:36,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:37:36,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 160 [2021-11-09 08:37:36,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:37:57,217 INFO L129 PetriNetUnfolder]: 5716/11997 cut-off events. [2021-11-09 08:37:57,217 INFO L130 PetriNetUnfolder]: For 330758/330761 co-relation queries the response was YES. [2021-11-09 08:37:57,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90423 conditions, 11997 events. 5716/11997 cut-off events. For 330758/330761 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 116003 event pairs, 1180 based on Foata normal form. 11/11899 useless extension candidates. Maximal degree in co-relation 90227. Up to 6066 conditions per place. [2021-11-09 08:37:57,945 INFO L132 encePairwiseOnDemand]: 108/160 looper letters, 651 selfloop transitions, 588 changer transitions 6/1284 dead transitions. [2021-11-09 08:37:57,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 1284 transitions, 18951 flow [2021-11-09 08:37:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-09 08:37:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-11-09 08:37:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5295 transitions. [2021-11-09 08:37:57,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3276608910891089 [2021-11-09 08:37:57,959 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5295 transitions. [2021-11-09 08:37:57,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5295 transitions. [2021-11-09 08:37:57,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:37:57,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5295 transitions. [2021-11-09 08:37:57,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 52.42574257425743) internal successors, (5295), 101 states have internal predecessors, (5295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:57,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 160.0) internal successors, (16320), 102 states have internal predecessors, (16320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:58,003 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 160.0) internal successors, (16320), 102 states have internal predecessors, (16320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:58,003 INFO L186 Difference]: Start difference. First operand has 699 places, 981 transitions, 12790 flow. Second operand 101 states and 5295 transitions. [2021-11-09 08:37:58,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 1284 transitions, 18951 flow [2021-11-09 08:38:01,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 1284 transitions, 18323 flow, removed 199 selfloop flow, removed 69 redundant places. [2021-11-09 08:38:01,267 INFO L242 Difference]: Finished difference. Result has 747 places, 1081 transitions, 15420 flow [2021-11-09 08:38:01,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=12222, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=496, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=15420, PETRI_PLACES=747, PETRI_TRANSITIONS=1081} [2021-11-09 08:38:01,269 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 603 predicate places. [2021-11-09 08:38:01,269 INFO L470 AbstractCegarLoop]: Abstraction has has 747 places, 1081 transitions, 15420 flow [2021-11-09 08:38:01,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 50.4078947368421) internal successors, (3831), 76 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:01,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:01,270 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:01,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:01,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:38:01,470 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:01,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash -886358064, now seen corresponding path program 12 times [2021-11-09 08:38:01,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:01,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062038184] [2021-11-09 08:38:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:01,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:05,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:05,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062038184] [2021-11-09 08:38:05,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062038184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:05,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873849460] [2021-11-09 08:38:05,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:38:05,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:05,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:05,736 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:05,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:38:09,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-09 08:38:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:09,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 08:38:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:12,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:38:13,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:38:14,486 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:38:14,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2021-11-09 08:38:15,401 INFO L354 Elim1Store]: treesize reduction 8, result has 50.0 percent of original size [2021-11-09 08:38:15,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2021-11-09 08:38:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873849460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:16,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:16,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 45] total 82 [2021-11-09 08:38:16,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336465530] [2021-11-09 08:38:16,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-09 08:38:16,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-09 08:38:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=6225, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 08:38:16,120 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 160 [2021-11-09 08:38:16,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 1081 transitions, 15420 flow. Second operand has 82 states, 82 states have (on average 41.31707317073171) internal successors, (3388), 82 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:16,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:38:16,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 160 [2021-11-09 08:38:16,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:38:46,582 INFO L129 PetriNetUnfolder]: 7248/14918 cut-off events. [2021-11-09 08:38:46,582 INFO L130 PetriNetUnfolder]: For 503121/503124 co-relation queries the response was YES. [2021-11-09 08:38:47,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124101 conditions, 14918 events. 7248/14918 cut-off events. For 503121/503124 co-relation queries the response was YES. Maximal size of possible extension queue 1372. Compared 148880 event pairs, 1354 based on Foata normal form. 24/14815 useless extension candidates. Maximal degree in co-relation 123887. Up to 7375 conditions per place. [2021-11-09 08:38:47,510 INFO L132 encePairwiseOnDemand]: 106/160 looper letters, 964 selfloop transitions, 542 changer transitions 20/1560 dead transitions. [2021-11-09 08:38:47,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 1560 transitions, 26224 flow [2021-11-09 08:38:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-09 08:38:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-11-09 08:38:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 4592 transitions. [2021-11-09 08:38:47,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2733333333333333 [2021-11-09 08:38:47,517 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 4592 transitions. [2021-11-09 08:38:47,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 4592 transitions. [2021-11-09 08:38:47,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:38:47,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 4592 transitions. [2021-11-09 08:38:47,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 43.733333333333334) internal successors, (4592), 105 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:47,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 160.0) internal successors, (16960), 106 states have internal predecessors, (16960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:47,550 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 160.0) internal successors, (16960), 106 states have internal predecessors, (16960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:47,550 INFO L186 Difference]: Start difference. First operand has 747 places, 1081 transitions, 15420 flow. Second operand 105 states and 4592 transitions. [2021-11-09 08:38:47,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 1560 transitions, 26224 flow [2021-11-09 08:38:52,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 1560 transitions, 25144 flow, removed 297 selfloop flow, removed 78 redundant places. [2021-11-09 08:38:52,123 INFO L242 Difference]: Finished difference. Result has 790 places, 1293 transitions, 20569 flow [2021-11-09 08:38:52,125 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=14496, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=20569, PETRI_PLACES=790, PETRI_TRANSITIONS=1293} [2021-11-09 08:38:52,126 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 646 predicate places. [2021-11-09 08:38:52,126 INFO L470 AbstractCegarLoop]: Abstraction has has 790 places, 1293 transitions, 20569 flow [2021-11-09 08:38:52,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 41.31707317073171) internal successors, (3388), 82 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:52,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:38:52,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:52,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:52,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:52,343 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:38:52,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash -128963558, now seen corresponding path program 13 times [2021-11-09 08:38:52,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:52,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449583294] [2021-11-09 08:38:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:52,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:55,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:55,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449583294] [2021-11-09 08:38:55,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449583294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:55,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090965215] [2021-11-09 08:38:55,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:38:55,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:55,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:55,508 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:55,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:38:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 08:38:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:02,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:02,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 46 [2021-11-09 08:39:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:03,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090965215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:03,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36] total 73 [2021-11-09 08:39:03,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326074730] [2021-11-09 08:39:03,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-09 08:39:03,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-09 08:39:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=4866, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:39:03,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 160 [2021-11-09 08:39:03,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 1293 transitions, 20569 flow. Second operand has 73 states, 73 states have (on average 50.50684931506849) internal successors, (3687), 73 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:03,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:03,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 160 [2021-11-09 08:39:03,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 08:39:28,308 INFO L129 PetriNetUnfolder]: 7489/15507 cut-off events. [2021-11-09 08:39:28,308 INFO L130 PetriNetUnfolder]: For 574433/574436 co-relation queries the response was YES. [2021-11-09 08:39:29,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134361 conditions, 15507 events. 7489/15507 cut-off events. For 574433/574436 co-relation queries the response was YES. Maximal size of possible extension queue 1426. Compared 156639 event pairs, 1379 based on Foata normal form. 6/15355 useless extension candidates. Maximal degree in co-relation 134130. Up to 8650 conditions per place. [2021-11-09 08:39:29,168 INFO L132 encePairwiseOnDemand]: 107/160 looper letters, 1082 selfloop transitions, 388 changer transitions 10/1519 dead transitions. [2021-11-09 08:39:29,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 1519 transitions, 26648 flow [2021-11-09 08:39:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-09 08:39:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-11-09 08:39:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 4922 transitions. [2021-11-09 08:39:29,191 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.32726063829787233 [2021-11-09 08:39:29,192 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 4922 transitions. [2021-11-09 08:39:29,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 4922 transitions. [2021-11-09 08:39:29,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:39:29,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 4922 transitions. [2021-11-09 08:39:29,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 52.361702127659576) internal successors, (4922), 94 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:29,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 160.0) internal successors, (15200), 95 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:29,224 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 160.0) internal successors, (15200), 95 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:29,224 INFO L186 Difference]: Start difference. First operand has 790 places, 1293 transitions, 20569 flow. Second operand 94 states and 4922 transitions. [2021-11-09 08:39:29,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 1519 transitions, 26648 flow [2021-11-09 08:39:36,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 1519 transitions, 24397 flow, removed 1028 selfloop flow, removed 55 redundant places. [2021-11-09 08:39:36,206 INFO L242 Difference]: Finished difference. Result has 839 places, 1328 transitions, 20357 flow [2021-11-09 08:39:36,207 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=18600, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=20357, PETRI_PLACES=839, PETRI_TRANSITIONS=1328} [2021-11-09 08:39:36,208 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 695 predicate places. [2021-11-09 08:39:36,208 INFO L470 AbstractCegarLoop]: Abstraction has has 839 places, 1328 transitions, 20357 flow [2021-11-09 08:39:36,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 50.50684931506849) internal successors, (3687), 73 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:36,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 08:39:36,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:36,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-09 08:39:36,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:36,410 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 08:39:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash -900828240, now seen corresponding path program 14 times [2021-11-09 08:39:36,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:36,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660147381] [2021-11-09 08:39:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:36,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:41,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:41,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660147381] [2021-11-09 08:39:41,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660147381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:41,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780351774] [2021-11-09 08:39:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:39:41,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:41,411 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:41,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3e3c4bd-7241-415f-ae83-65d3c79e1c33/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:39:45,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:39:45,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-09 08:39:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:39:49,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:39:50,422 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:39:50,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:39:50,999 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 08:39:51,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 25 [2021-11-09 08:39:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:51,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780351774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:51,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:51,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 40] total 77 [2021-11-09 08:39:51,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808759306] [2021-11-09 08:39:51,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-09 08:39:51,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:51,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-09 08:39:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=5462, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 08:39:51,809 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 160 [2021-11-09 08:39:51,811 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 839 places, 1328 transitions, 20357 flow. Second operand has 77 states, 77 states have (on average 41.38961038961039) internal successors, (3187), 77 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:51,811 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 08:39:51,811 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 160 [2021-11-09 08:39:51,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand