./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa --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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:53:01,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:53:01,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:53:01,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:53:01,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:53:01,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:53:01,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:53:01,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:53:01,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:53:01,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:53:01,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:53:01,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:53:01,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:53:01,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:53:01,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:53:01,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:53:01,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:53:01,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:53:01,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:53:01,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:53:01,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:53:01,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:53:01,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:53:01,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:53:01,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:53:01,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:53:01,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:53:01,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:53:01,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:53:01,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:53:01,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:53:01,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:53:01,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:53:01,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:53:01,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:53:01,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:53:01,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:53:01,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:53:01,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:53:01,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:53:01,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:53:01,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:53:02,008 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:53:02,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:53:02,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:53:02,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:53:02,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:53:02,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:53:02,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:53:02,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:53:02,010 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:53:02,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:53:02,010 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:53:02,011 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:53:02,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:53:02,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:53:02,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:53:02,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:53:02,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:53:02,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:53:02,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:53:02,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:53:02,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:53:02,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:53:02,013 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:53:02,013 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:53:02,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:53:02,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:53:02,013 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_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2021-12-06 22:53:02,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:53:02,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:53:02,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:53:02,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:53:02,190 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:53:02,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2021-12-06 22:53:02,238 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/data/7520a04a3/b95fd5cb9bfe492ab1579e54c6764f0d/FLAG26a469689 [2021-12-06 22:53:02,601 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:53:02,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2021-12-06 22:53:02,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/data/7520a04a3/b95fd5cb9bfe492ab1579e54c6764f0d/FLAG26a469689 [2021-12-06 22:53:02,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/data/7520a04a3/b95fd5cb9bfe492ab1579e54c6764f0d [2021-12-06 22:53:02,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:53:02,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:53:02,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:53:02,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:53:02,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:53:02,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463b4ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02, skipping insertion in model container [2021-12-06 22:53:02,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:53:02,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:53:02,755 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2021-12-06 22:53:02,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:53:02,764 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:53:02,780 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2021-12-06 22:53:02,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:53:02,791 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:53:02,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02 WrapperNode [2021-12-06 22:53:02,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:53:02,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:53:02,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:53:02,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:53:02,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,822 INFO L137 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2021-12-06 22:53:02,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:53:02,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:53:02,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:53:02,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:53:02,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:53:02,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:53:02,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:53:02,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:53:02,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (1/1) ... [2021-12-06 22:53:02,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:53:02,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:02,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:53:02,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:53:02,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:53:02,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 22:53:02,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 22:53:02,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 22:53:02,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 22:53:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:53:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:53:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:53:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 22:53:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 22:53:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:53:02,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:53:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:53:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:53:02,909 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 22:53:02,967 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:53:02,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:53:03,083 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:53:03,115 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:53:03,115 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 22:53:03,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:53:03 BoogieIcfgContainer [2021-12-06 22:53:03,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:53:03,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:53:03,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:53:03,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:53:03,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:53:02" (1/3) ... [2021-12-06 22:53:03,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633881c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:53:03, skipping insertion in model container [2021-12-06 22:53:03,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:53:02" (2/3) ... [2021-12-06 22:53:03,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633881c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:53:03, skipping insertion in model container [2021-12-06 22:53:03,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:53:03" (3/3) ... [2021-12-06 22:53:03,124 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2021-12-06 22:53:03,128 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 22:53:03,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:53:03,128 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:53:03,128 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 22:53:03,150 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,151 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,151 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,151 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,152 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,152 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,153 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,154 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,155 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,155 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,155 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,156 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,156 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,157 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,157 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,157 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,157 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,158 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,159 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,160 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,160 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,163 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,163 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,164 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,164 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,164 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,166 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:53:03,170 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 22:53:03,221 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:53:03,226 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 [2021-12-06 22:53:03,227 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 22:53:03,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2021-12-06 22:53:03,274 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2021-12-06 22:53:03,274 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 22:53:03,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-06 22:53:03,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2021-12-06 22:53:03,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2021-12-06 22:53:03,299 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2021-12-06 22:53:03,299 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 22:53:03,299 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:53:03,300 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] [2021-12-06 22:53:03,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:53:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:03,304 INFO L85 PathProgramCache]: Analyzing trace with hash -566801703, now seen corresponding path program 1 times [2021-12-06 22:53:03,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:03,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665708828] [2021-12-06 22:53:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:03,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:03,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:03,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665708828] [2021-12-06 22:53:03,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665708828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:03,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:03,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:53:03,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536627202] [2021-12-06 22:53:03,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:03,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:53:03,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:53:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:53:03,497 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2021-12-06 22:53:03,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:03,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:53:03,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2021-12-06 22:53:03,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:53:03,554 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2021-12-06 22:53:03,554 INFO L130 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2021-12-06 22:53:03,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 175 event pairs, 5 based on Foata normal form. 14/114 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2021-12-06 22:53:03,557 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2021-12-06 22:53:03,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2021-12-06 22:53:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:53:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 22:53:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2021-12-06 22:53:03,571 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2021-12-06 22:53:03,571 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2021-12-06 22:53:03,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2021-12-06 22:53:03,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:53:03,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2021-12-06 22:53:03,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:03,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:03,584 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:03,585 INFO L186 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2021-12-06 22:53:03,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2021-12-06 22:53:03,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 22:53:03,593 INFO L242 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2021-12-06 22:53:03,594 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2021-12-06 22:53:03,598 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2021-12-06 22:53:03,598 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2021-12-06 22:53:03,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:03,599 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:53:03,599 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] [2021-12-06 22:53:03,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:53:03,599 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:53:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash 693036951, now seen corresponding path program 1 times [2021-12-06 22:53:03,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:03,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908826597] [2021-12-06 22:53:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:03,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:03,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:03,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908826597] [2021-12-06 22:53:03,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908826597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:03,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:03,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:53:03,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574266762] [2021-12-06 22:53:03,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:03,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:53:03,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:03,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:53:03,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:53:03,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2021-12-06 22:53:03,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:03,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:53:03,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2021-12-06 22:53:03,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:53:04,014 INFO L129 PetriNetUnfolder]: 37/152 cut-off events. [2021-12-06 22:53:04,015 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-12-06 22:53:04,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 152 events. 37/152 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 383 event pairs, 7 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 245. Up to 69 conditions per place. [2021-12-06 22:53:04,017 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 30 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2021-12-06 22:53:04,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 243 flow [2021-12-06 22:53:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:53:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-06 22:53:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 362 transitions. [2021-12-06 22:53:04,022 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6856060606060606 [2021-12-06 22:53:04,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 362 transitions. [2021-12-06 22:53:04,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 362 transitions. [2021-12-06 22:53:04,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:53:04,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 362 transitions. [2021-12-06 22:53:04,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.333333333333336) internal successors, (362), 6 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:04,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:04,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:04,031 INFO L186 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 6 states and 362 transitions. [2021-12-06 22:53:04,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 243 flow [2021-12-06 22:53:04,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 81 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 22:53:04,035 INFO L242 Difference]: Finished difference. Result has 80 places, 75 transitions, 182 flow [2021-12-06 22:53:04,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2021-12-06 22:53:04,036 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2021-12-06 22:53:04,036 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 182 flow [2021-12-06 22:53:04,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.5) internal successors, (345), 6 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:04,037 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:53:04,037 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:04,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:53:04,037 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:53:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:04,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1642363136, now seen corresponding path program 1 times [2021-12-06 22:53:04,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:04,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155035062] [2021-12-06 22:53:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:04,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:04,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:04,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155035062] [2021-12-06 22:53:04,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155035062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:04,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788210390] [2021-12-06 22:53:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:04,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:04,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:04,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:53:04,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:53:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:04,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:53:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:53:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:04,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:53:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:04,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788210390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:53:04,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:53:04,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2021-12-06 22:53:04,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680638549] [2021-12-06 22:53:04,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:53:04,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:53:04,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:04,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:53:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:53:04,903 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2021-12-06 22:53:04,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 182 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:04,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:53:04,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2021-12-06 22:53:04,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:53:05,172 INFO L129 PetriNetUnfolder]: 53/224 cut-off events. [2021-12-06 22:53:05,172 INFO L130 PetriNetUnfolder]: For 39/43 co-relation queries the response was YES. [2021-12-06 22:53:05,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 224 events. 53/224 cut-off events. For 39/43 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 690 event pairs, 6 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 417. Up to 38 conditions per place. [2021-12-06 22:53:05,175 INFO L132 encePairwiseOnDemand]: 76/88 looper letters, 44 selfloop transitions, 18 changer transitions 0/106 dead transitions. [2021-12-06 22:53:05,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 106 transitions, 391 flow [2021-12-06 22:53:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:53:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 22:53:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 712 transitions. [2021-12-06 22:53:05,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2021-12-06 22:53:05,180 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 712 transitions. [2021-12-06 22:53:05,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 712 transitions. [2021-12-06 22:53:05,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:53:05,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 712 transitions. [2021-12-06 22:53:05,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 59.333333333333336) internal successors, (712), 12 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:05,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:05,189 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:05,189 INFO L186 Difference]: Start difference. First operand has 80 places, 75 transitions, 182 flow. Second operand 12 states and 712 transitions. [2021-12-06 22:53:05,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 106 transitions, 391 flow [2021-12-06 22:53:05,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 106 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-06 22:53:05,194 INFO L242 Difference]: Finished difference. Result has 93 places, 84 transitions, 266 flow [2021-12-06 22:53:05,194 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=266, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2021-12-06 22:53:05,195 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2021-12-06 22:53:05,195 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 266 flow [2021-12-06 22:53:05,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:05,196 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:53:05,197 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] [2021-12-06 22:53:05,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:53:05,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:05,399 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:53:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:05,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2040161778, now seen corresponding path program 1 times [2021-12-06 22:53:05,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:05,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331372232] [2021-12-06 22:53:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:05,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:05,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:05,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331372232] [2021-12-06 22:53:05,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331372232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:05,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265698860] [2021-12-06 22:53:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:05,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:05,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:53:05,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:53:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:05,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 22:53:05,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:53:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:06,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:53:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:07,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265698860] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:07,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:53:07,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2021-12-06 22:53:07,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620193521] [2021-12-06 22:53:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:07,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:53:07,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:53:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-12-06 22:53:07,611 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-06 22:53:07,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 266 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:07,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:53:07,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-06 22:53:07,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:53:09,324 INFO L129 PetriNetUnfolder]: 225/729 cut-off events. [2021-12-06 22:53:09,325 INFO L130 PetriNetUnfolder]: For 426/426 co-relation queries the response was YES. [2021-12-06 22:53:09,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1722 conditions, 729 events. 225/729 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4095 event pairs, 42 based on Foata normal form. 2/724 useless extension candidates. Maximal degree in co-relation 1712. Up to 100 conditions per place. [2021-12-06 22:53:09,333 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 97 selfloop transitions, 67 changer transitions 15/218 dead transitions. [2021-12-06 22:53:09,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 218 transitions, 1165 flow [2021-12-06 22:53:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:53:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-06 22:53:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1523 transitions. [2021-12-06 22:53:09,338 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6181006493506493 [2021-12-06 22:53:09,338 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1523 transitions. [2021-12-06 22:53:09,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1523 transitions. [2021-12-06 22:53:09,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:53:09,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1523 transitions. [2021-12-06 22:53:09,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.392857142857146) internal successors, (1523), 28 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:09,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:09,350 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:09,351 INFO L186 Difference]: Start difference. First operand has 93 places, 84 transitions, 266 flow. Second operand 28 states and 1523 transitions. [2021-12-06 22:53:09,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 218 transitions, 1165 flow [2021-12-06 22:53:09,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 218 transitions, 1159 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-06 22:53:09,361 INFO L242 Difference]: Finished difference. Result has 126 places, 141 transitions, 760 flow [2021-12-06 22:53:09,362 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=760, PETRI_PLACES=126, PETRI_TRANSITIONS=141} [2021-12-06 22:53:09,362 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 48 predicate places. [2021-12-06 22:53:09,363 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 141 transitions, 760 flow [2021-12-06 22:53:09,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:09,363 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:53:09,363 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] [2021-12-06 22:53:09,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:53:09,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:09,566 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:53:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:09,567 INFO L85 PathProgramCache]: Analyzing trace with hash 477199407, now seen corresponding path program 1 times [2021-12-06 22:53:09,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:09,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823951558] [2021-12-06 22:53:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:09,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:10,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:10,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823951558] [2021-12-06 22:53:10,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823951558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:10,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535783384] [2021-12-06 22:53:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:10,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:10,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:10,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:53:10,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:53:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:10,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 22:53:10,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:53:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:11,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:53:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:13,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535783384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:53:13,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:53:13,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 37 [2021-12-06 22:53:13,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853991336] [2021-12-06 22:53:13,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:53:13,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 22:53:13,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 22:53:13,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:53:13,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-06 22:53:13,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 141 transitions, 760 flow. Second operand has 37 states, 37 states have (on average 51.08108108108108) internal successors, (1890), 37 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:13,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:53:13,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-06 22:53:13,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:54:13,728 INFO L129 PetriNetUnfolder]: 777/2587 cut-off events. [2021-12-06 22:54:13,728 INFO L130 PetriNetUnfolder]: For 4777/4777 co-relation queries the response was YES. [2021-12-06 22:54:13,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7903 conditions, 2587 events. 777/2587 cut-off events. For 4777/4777 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22302 event pairs, 21 based on Foata normal form. 27/2610 useless extension candidates. Maximal degree in co-relation 7883. Up to 363 conditions per place. [2021-12-06 22:54:13,745 INFO L132 encePairwiseOnDemand]: 66/88 looper letters, 315 selfloop transitions, 334 changer transitions 240/928 dead transitions. [2021-12-06 22:54:13,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 928 transitions, 7362 flow [2021-12-06 22:54:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-06 22:54:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-12-06 22:54:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 10097 transitions. [2021-12-06 22:54:13,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5975970643939394 [2021-12-06 22:54:13,761 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 10097 transitions. [2021-12-06 22:54:13,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 10097 transitions. [2021-12-06 22:54:13,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:54:13,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 10097 transitions. [2021-12-06 22:54:13,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 52.588541666666664) internal successors, (10097), 192 states have internal predecessors, (10097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:13,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 88.0) internal successors, (16984), 193 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:13,810 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 88.0) internal successors, (16984), 193 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:13,810 INFO L186 Difference]: Start difference. First operand has 126 places, 141 transitions, 760 flow. Second operand 192 states and 10097 transitions. [2021-12-06 22:54:13,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 928 transitions, 7362 flow [2021-12-06 22:54:13,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 928 transitions, 6636 flow, removed 351 selfloop flow, removed 11 redundant places. [2021-12-06 22:54:13,864 INFO L242 Difference]: Finished difference. Result has 405 places, 478 transitions, 4078 flow [2021-12-06 22:54:13,865 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=4078, PETRI_PLACES=405, PETRI_TRANSITIONS=478} [2021-12-06 22:54:13,865 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 327 predicate places. [2021-12-06 22:54:13,866 INFO L470 AbstractCegarLoop]: Abstraction has has 405 places, 478 transitions, 4078 flow [2021-12-06 22:54:13,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 51.08108108108108) internal successors, (1890), 37 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:13,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:54:13,867 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:13,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:54:14,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:14,068 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:54:14,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:14,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1046567061, now seen corresponding path program 2 times [2021-12-06 22:54:14,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:14,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133464339] [2021-12-06 22:54:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:14,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:54:14,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133464339] [2021-12-06 22:54:14,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133464339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:14,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:14,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:54:14,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725735024] [2021-12-06 22:54:14,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:14,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:54:14,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:54:14,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:14,258 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2021-12-06 22:54:14,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 478 transitions, 4078 flow. Second operand has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:14,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:54:14,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2021-12-06 22:54:14,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:54:15,036 INFO L129 PetriNetUnfolder]: 865/2511 cut-off events. [2021-12-06 22:54:15,036 INFO L130 PetriNetUnfolder]: For 59852/59852 co-relation queries the response was YES. [2021-12-06 22:54:15,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14815 conditions, 2511 events. 865/2511 cut-off events. For 59852/59852 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19863 event pairs, 63 based on Foata normal form. 6/2505 useless extension candidates. Maximal degree in co-relation 14698. Up to 680 conditions per place. [2021-12-06 22:54:15,088 INFO L132 encePairwiseOnDemand]: 80/88 looper letters, 484 selfloop transitions, 223 changer transitions 0/759 dead transitions. [2021-12-06 22:54:15,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 759 transitions, 8139 flow [2021-12-06 22:54:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:54:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 22:54:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 507 transitions. [2021-12-06 22:54:15,089 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.823051948051948 [2021-12-06 22:54:15,089 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 507 transitions. [2021-12-06 22:54:15,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 507 transitions. [2021-12-06 22:54:15,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:54:15,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 507 transitions. [2021-12-06 22:54:15,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.42857142857143) internal successors, (507), 7 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:15,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:15,092 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:15,092 INFO L186 Difference]: Start difference. First operand has 405 places, 478 transitions, 4078 flow. Second operand 7 states and 507 transitions. [2021-12-06 22:54:15,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 759 transitions, 8139 flow [2021-12-06 22:54:15,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 759 transitions, 7310 flow, removed 391 selfloop flow, removed 74 redundant places. [2021-12-06 22:54:15,251 INFO L242 Difference]: Finished difference. Result has 264 places, 591 transitions, 5392 flow [2021-12-06 22:54:15,252 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5392, PETRI_PLACES=264, PETRI_TRANSITIONS=591} [2021-12-06 22:54:15,252 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 186 predicate places. [2021-12-06 22:54:15,252 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 591 transitions, 5392 flow [2021-12-06 22:54:15,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:15,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:54:15,253 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:15,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:54:15,253 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:54:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash 621752165, now seen corresponding path program 3 times [2021-12-06 22:54:15,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:15,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660430631] [2021-12-06 22:54:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:15,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:54:15,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:15,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660430631] [2021-12-06 22:54:15,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660430631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:15,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:15,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:54:15,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31705200] [2021-12-06 22:54:15,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:15,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:54:15,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:54:15,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:15,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2021-12-06 22:54:15,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 591 transitions, 5392 flow. Second operand has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:15,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:54:15,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2021-12-06 22:54:15,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:54:16,000 INFO L129 PetriNetUnfolder]: 861/2432 cut-off events. [2021-12-06 22:54:16,000 INFO L130 PetriNetUnfolder]: For 22439/22439 co-relation queries the response was YES. [2021-12-06 22:54:16,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12328 conditions, 2432 events. 861/2432 cut-off events. For 22439/22439 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18977 event pairs, 82 based on Foata normal form. 12/2422 useless extension candidates. Maximal degree in co-relation 12269. Up to 1044 conditions per place. [2021-12-06 22:54:16,039 INFO L132 encePairwiseOnDemand]: 80/88 looper letters, 493 selfloop transitions, 152 changer transitions 0/697 dead transitions. [2021-12-06 22:54:16,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 697 transitions, 7625 flow [2021-12-06 22:54:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:54:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 22:54:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 494 transitions. [2021-12-06 22:54:16,040 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.801948051948052 [2021-12-06 22:54:16,040 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 494 transitions. [2021-12-06 22:54:16,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 494 transitions. [2021-12-06 22:54:16,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:54:16,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 494 transitions. [2021-12-06 22:54:16,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.57142857142857) internal successors, (494), 7 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:16,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:16,043 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:16,043 INFO L186 Difference]: Start difference. First operand has 264 places, 591 transitions, 5392 flow. Second operand 7 states and 494 transitions. [2021-12-06 22:54:16,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 697 transitions, 7625 flow [2021-12-06 22:54:16,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 697 transitions, 7565 flow, removed 30 selfloop flow, removed 0 redundant places. [2021-12-06 22:54:16,145 INFO L242 Difference]: Finished difference. Result has 274 places, 602 transitions, 5939 flow [2021-12-06 22:54:16,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5939, PETRI_PLACES=274, PETRI_TRANSITIONS=602} [2021-12-06 22:54:16,147 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 196 predicate places. [2021-12-06 22:54:16,147 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 602 transitions, 5939 flow [2021-12-06 22:54:16,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:16,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:54:16,147 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:16,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:54:16,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:54:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:16,148 INFO L85 PathProgramCache]: Analyzing trace with hash 883620399, now seen corresponding path program 4 times [2021-12-06 22:54:16,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:16,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706506651] [2021-12-06 22:54:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:16,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:54:16,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706506651] [2021-12-06 22:54:16,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706506651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:16,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:16,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:54:16,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538208662] [2021-12-06 22:54:16,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:16,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:54:16,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:54:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:16,258 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2021-12-06 22:54:16,258 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 602 transitions, 5939 flow. Second operand has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:16,258 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:54:16,258 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2021-12-06 22:54:16,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:54:16,913 INFO L129 PetriNetUnfolder]: 877/2477 cut-off events. [2021-12-06 22:54:16,913 INFO L130 PetriNetUnfolder]: For 25797/25797 co-relation queries the response was YES. [2021-12-06 22:54:16,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12999 conditions, 2477 events. 877/2477 cut-off events. For 25797/25797 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19602 event pairs, 57 based on Foata normal form. 12/2472 useless extension candidates. Maximal degree in co-relation 12935. Up to 679 conditions per place. [2021-12-06 22:54:16,949 INFO L132 encePairwiseOnDemand]: 82/88 looper letters, 488 selfloop transitions, 241 changer transitions 0/781 dead transitions. [2021-12-06 22:54:16,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 781 transitions, 9045 flow [2021-12-06 22:54:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:54:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 22:54:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 641 transitions. [2021-12-06 22:54:16,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8093434343434344 [2021-12-06 22:54:16,951 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 641 transitions. [2021-12-06 22:54:16,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 641 transitions. [2021-12-06 22:54:16,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:54:16,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 641 transitions. [2021-12-06 22:54:16,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 71.22222222222223) internal successors, (641), 9 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:16,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:16,955 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:16,955 INFO L186 Difference]: Start difference. First operand has 274 places, 602 transitions, 5939 flow. Second operand 9 states and 641 transitions. [2021-12-06 22:54:16,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 781 transitions, 9045 flow [2021-12-06 22:54:17,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 781 transitions, 9033 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-06 22:54:17,078 INFO L242 Difference]: Finished difference. Result has 284 places, 611 transitions, 6690 flow [2021-12-06 22:54:17,079 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6690, PETRI_PLACES=284, PETRI_TRANSITIONS=611} [2021-12-06 22:54:17,080 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 206 predicate places. [2021-12-06 22:54:17,080 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 611 transitions, 6690 flow [2021-12-06 22:54:17,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:17,080 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:54:17,080 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:17,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:54:17,081 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:54:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1098323807, now seen corresponding path program 5 times [2021-12-06 22:54:17,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:17,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636019950] [2021-12-06 22:54:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:17,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:54:17,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636019950] [2021-12-06 22:54:17,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636019950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:17,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:17,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:54:17,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103941162] [2021-12-06 22:54:17,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:17,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:54:17,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:54:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:17,176 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2021-12-06 22:54:17,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 611 transitions, 6690 flow. Second operand has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:17,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:54:17,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2021-12-06 22:54:17,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:54:17,788 INFO L129 PetriNetUnfolder]: 871/2394 cut-off events. [2021-12-06 22:54:17,788 INFO L130 PetriNetUnfolder]: For 27753/27753 co-relation queries the response was YES. [2021-12-06 22:54:17,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13500 conditions, 2394 events. 871/2394 cut-off events. For 27753/27753 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18678 event pairs, 82 based on Foata normal form. 12/2390 useless extension candidates. Maximal degree in co-relation 13433. Up to 680 conditions per place. [2021-12-06 22:54:17,838 INFO L132 encePairwiseOnDemand]: 80/88 looper letters, 524 selfloop transitions, 170 changer transitions 0/746 dead transitions. [2021-12-06 22:54:17,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 746 transitions, 9279 flow [2021-12-06 22:54:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:54:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 22:54:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 502 transitions. [2021-12-06 22:54:17,840 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.814935064935065 [2021-12-06 22:54:17,840 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 502 transitions. [2021-12-06 22:54:17,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 502 transitions. [2021-12-06 22:54:17,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:54:17,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 502 transitions. [2021-12-06 22:54:17,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:17,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:17,842 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:17,842 INFO L186 Difference]: Start difference. First operand has 284 places, 611 transitions, 6690 flow. Second operand 7 states and 502 transitions. [2021-12-06 22:54:17,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 746 transitions, 9279 flow [2021-12-06 22:54:17,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 746 transitions, 8915 flow, removed 18 selfloop flow, removed 5 redundant places. [2021-12-06 22:54:17,966 INFO L242 Difference]: Finished difference. Result has 288 places, 612 transitions, 6823 flow [2021-12-06 22:54:17,967 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6823, PETRI_PLACES=288, PETRI_TRANSITIONS=612} [2021-12-06 22:54:17,967 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 210 predicate places. [2021-12-06 22:54:17,967 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 612 transitions, 6823 flow [2021-12-06 22:54:17,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.0) internal successors, (402), 6 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:17,968 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:54:17,968 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:17,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:54:17,968 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:54:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash 787801260, now seen corresponding path program 2 times [2021-12-06 22:54:17,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:17,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238845963] [2021-12-06 22:54:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:17,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:18,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:18,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238845963] [2021-12-06 22:54:18,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238845963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:18,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924233198] [2021-12-06 22:54:18,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:54:18,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:18,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:18,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:18,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:54:18,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:54:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:54:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 22:54:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:19,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924233198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:22,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:22,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2021-12-06 22:54:22,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481688356] [2021-12-06 22:54:22,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:22,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 22:54:22,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 22:54:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:54:22,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 88 [2021-12-06 22:54:22,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 612 transitions, 6823 flow. Second operand has 40 states, 40 states have (on average 53.05) internal successors, (2122), 40 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:22,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:54:22,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 88 [2021-12-06 22:54:22,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:54:48,937 INFO L129 PetriNetUnfolder]: 1232/3708 cut-off events. [2021-12-06 22:54:48,937 INFO L130 PetriNetUnfolder]: For 41562/41626 co-relation queries the response was YES. [2021-12-06 22:54:48,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20379 conditions, 3708 events. 1232/3708 cut-off events. For 41562/41626 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 33715 event pairs, 45 based on Foata normal form. 52/3739 useless extension candidates. Maximal degree in co-relation 20309. Up to 782 conditions per place. [2021-12-06 22:54:48,973 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 553 selfloop transitions, 451 changer transitions 127/1241 dead transitions. [2021-12-06 22:54:48,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1241 transitions, 16014 flow [2021-12-06 22:54:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 22:54:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-12-06 22:54:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 4657 transitions. [2021-12-06 22:54:48,977 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6225935828877005 [2021-12-06 22:54:48,977 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 4657 transitions. [2021-12-06 22:54:48,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 4657 transitions. [2021-12-06 22:54:48,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:54:48,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 4657 transitions. [2021-12-06 22:54:48,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 54.78823529411765) internal successors, (4657), 85 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 88.0) internal successors, (7568), 86 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,993 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 88.0) internal successors, (7568), 86 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:48,993 INFO L186 Difference]: Start difference. First operand has 288 places, 612 transitions, 6823 flow. Second operand 85 states and 4657 transitions. [2021-12-06 22:54:48,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1241 transitions, 16014 flow [2021-12-06 22:54:49,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1241 transitions, 15719 flow, removed 32 selfloop flow, removed 1 redundant places. [2021-12-06 22:54:49,195 INFO L242 Difference]: Finished difference. Result has 416 places, 895 transitions, 11884 flow [2021-12-06 22:54:49,195 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=6667, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=11884, PETRI_PLACES=416, PETRI_TRANSITIONS=895} [2021-12-06 22:54:49,196 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 338 predicate places. [2021-12-06 22:54:49,196 INFO L470 AbstractCegarLoop]: Abstraction has has 416 places, 895 transitions, 11884 flow [2021-12-06 22:54:49,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 53.05) internal successors, (2122), 40 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:49,196 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:54:49,197 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:49,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:54:49,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 22:54:49,398 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:54:49,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:49,400 INFO L85 PathProgramCache]: Analyzing trace with hash 802986342, now seen corresponding path program 3 times [2021-12-06 22:54:49,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:49,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985380852] [2021-12-06 22:54:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:49,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:50,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:50,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985380852] [2021-12-06 22:54:50,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985380852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:50,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619053664] [2021-12-06 22:54:50,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:54:50,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:50,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:50,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:50,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:54:50,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:54:50,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:54:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 22:54:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:51,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:54:57,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619053664] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:57,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:57,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 36 [2021-12-06 22:54:57,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208616442] [2021-12-06 22:54:57,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:57,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 22:54:57,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 22:54:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 22:54:57,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-06 22:54:57,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 895 transitions, 11884 flow. Second operand has 36 states, 36 states have (on average 51.44444444444444) internal successors, (1852), 36 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:57,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:54:57,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-06 22:54:57,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:55:51,793 INFO L129 PetriNetUnfolder]: 1913/5305 cut-off events. [2021-12-06 22:55:51,793 INFO L130 PetriNetUnfolder]: For 84434/84434 co-relation queries the response was YES. [2021-12-06 22:55:51,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34647 conditions, 5305 events. 1913/5305 cut-off events. For 84434/84434 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 50350 event pairs, 178 based on Foata normal form. 11/5266 useless extension candidates. Maximal degree in co-relation 34532. Up to 1551 conditions per place. [2021-12-06 22:55:51,864 INFO L132 encePairwiseOnDemand]: 67/88 looper letters, 770 selfloop transitions, 601 changer transitions 157/1567 dead transitions. [2021-12-06 22:55:51,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1567 transitions, 24759 flow [2021-12-06 22:55:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 22:55:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-12-06 22:55:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 5042 transitions. [2021-12-06 22:55:51,869 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6031100478468899 [2021-12-06 22:55:51,869 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 5042 transitions. [2021-12-06 22:55:51,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 5042 transitions. [2021-12-06 22:55:51,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:55:51,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 5042 transitions. [2021-12-06 22:55:51,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 53.07368421052632) internal successors, (5042), 95 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:51,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 88.0) internal successors, (8448), 96 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:51,885 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 88.0) internal successors, (8448), 96 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:51,885 INFO L186 Difference]: Start difference. First operand has 416 places, 895 transitions, 11884 flow. Second operand 95 states and 5042 transitions. [2021-12-06 22:55:51,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1567 transitions, 24759 flow [2021-12-06 22:55:52,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1567 transitions, 24107 flow, removed 294 selfloop flow, removed 36 redundant places. [2021-12-06 22:55:52,384 INFO L242 Difference]: Finished difference. Result has 495 places, 1157 transitions, 17899 flow [2021-12-06 22:55:52,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=11508, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=17899, PETRI_PLACES=495, PETRI_TRANSITIONS=1157} [2021-12-06 22:55:52,385 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 417 predicate places. [2021-12-06 22:55:52,385 INFO L470 AbstractCegarLoop]: Abstraction has has 495 places, 1157 transitions, 17899 flow [2021-12-06 22:55:52,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 51.44444444444444) internal successors, (1852), 36 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:52,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:55:52,386 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:55:52,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:55:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 22:55:52,588 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:55:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1522413302, now seen corresponding path program 6 times [2021-12-06 22:55:52,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964448725] [2021-12-06 22:55:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:52,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:55:53,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:53,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964448725] [2021-12-06 22:55:53,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964448725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:55:53,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009069166] [2021-12-06 22:55:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:55:53,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:55:53,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:55:53,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:55:53,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:55:53,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 22:55:53,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:55:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 22:55:53,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:55:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:55:54,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:55:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:55:55,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009069166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:55:55,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:55:55,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 45 [2021-12-06 22:55:55,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667292228] [2021-12-06 22:55:55,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:55:55,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 22:55:55,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 22:55:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 22:55:55,318 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-06 22:55:55,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 1157 transitions, 17899 flow. Second operand has 45 states, 45 states have (on average 51.08888888888889) internal successors, (2299), 45 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:55:55,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:55:55,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-06 22:55:55,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:56:35,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:50,798 INFO L129 PetriNetUnfolder]: 2626/7129 cut-off events. [2021-12-06 22:56:50,798 INFO L130 PetriNetUnfolder]: For 154337/154337 co-relation queries the response was YES. [2021-12-06 22:56:50,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53468 conditions, 7129 events. 2626/7129 cut-off events. For 154337/154337 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 70251 event pairs, 159 based on Foata normal form. 18/7115 useless extension candidates. Maximal degree in co-relation 53329. Up to 1097 conditions per place. [2021-12-06 22:56:50,906 INFO L132 encePairwiseOnDemand]: 66/88 looper letters, 692 selfloop transitions, 1271 changer transitions 226/2228 dead transitions. [2021-12-06 22:56:50,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 2228 transitions, 40140 flow [2021-12-06 22:56:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-12-06 22:56:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-12-06 22:56:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 7626 transitions. [2021-12-06 22:56:50,913 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5976489028213167 [2021-12-06 22:56:50,913 INFO L72 ComplementDD]: Start complementDD. Operand 145 states and 7626 transitions. [2021-12-06 22:56:50,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 145 states and 7626 transitions. [2021-12-06 22:56:50,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:56:50,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 145 states and 7626 transitions. [2021-12-06 22:56:50,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 146 states, 145 states have (on average 52.59310344827586) internal successors, (7626), 145 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:50,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 146 states, 146 states have (on average 88.0) internal successors, (12848), 146 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:50,974 INFO L81 ComplementDD]: Finished complementDD. Result has 146 states, 146 states have (on average 88.0) internal successors, (12848), 146 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:50,974 INFO L186 Difference]: Start difference. First operand has 495 places, 1157 transitions, 17899 flow. Second operand 145 states and 7626 transitions. [2021-12-06 22:56:50,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 2228 transitions, 40140 flow [2021-12-06 22:56:52,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 2228 transitions, 39143 flow, removed 430 selfloop flow, removed 46 redundant places. [2021-12-06 22:56:52,209 INFO L242 Difference]: Finished difference. Result has 636 places, 1643 transitions, 31089 flow [2021-12-06 22:56:52,210 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=17342, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=792, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=31089, PETRI_PLACES=636, PETRI_TRANSITIONS=1643} [2021-12-06 22:56:52,210 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 558 predicate places. [2021-12-06 22:56:52,210 INFO L470 AbstractCegarLoop]: Abstraction has has 636 places, 1643 transitions, 31089 flow [2021-12-06 22:56:52,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 51.08888888888889) internal successors, (2299), 45 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:52,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:56:52,211 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:52,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:56:52,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:52,413 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:56:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1106501147, now seen corresponding path program 4 times [2021-12-06 22:56:52,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:52,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815118654] [2021-12-06 22:56:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:52,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:56:54,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:54,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815118654] [2021-12-06 22:56:54,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815118654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:56:54,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10131616] [2021-12-06 22:56:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:56:54,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:56:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:56:54,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:56:54,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:56:54,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:56:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:56:54,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 22:56:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:56:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:56:56,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:57:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:57:09,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10131616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:57:09,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:57:09,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 44 [2021-12-06 22:57:09,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32787627] [2021-12-06 22:57:09,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:57:09,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:57:09,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:57:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 22:57:09,657 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-06 22:57:09,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 1643 transitions, 31089 flow. Second operand has 44 states, 44 states have (on average 51.13636363636363) internal successors, (2250), 44 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:57:09,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:57:09,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-06 22:57:09,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:57:57,270 WARN L227 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 228 DAG size of output: 177 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:01:23,014 INFO L129 PetriNetUnfolder]: 3246/8868 cut-off events. [2021-12-06 23:01:23,014 INFO L130 PetriNetUnfolder]: For 419863/419863 co-relation queries the response was YES. [2021-12-06 23:01:23,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83646 conditions, 8868 events. 3246/8868 cut-off events. For 419863/419863 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 90098 event pairs, 39 based on Foata normal form. 24/8874 useless extension candidates. Maximal degree in co-relation 83461. Up to 1757 conditions per place. [2021-12-06 23:01:23,185 INFO L132 encePairwiseOnDemand]: 64/88 looper letters, 1196 selfloop transitions, 1710 changer transitions 208/3153 dead transitions. [2021-12-06 23:01:23,185 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 3153 transitions, 67103 flow [2021-12-06 23:01:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-06 23:01:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-12-06 23:01:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 10084 transitions. [2021-12-06 23:01:23,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5968276515151515 [2021-12-06 23:01:23,201 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 10084 transitions. [2021-12-06 23:01:23,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 10084 transitions. [2021-12-06 23:01:23,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:01:23,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 10084 transitions. [2021-12-06 23:01:23,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 52.520833333333336) internal successors, (10084), 192 states have internal predecessors, (10084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:23,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 88.0) internal successors, (16984), 193 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:23,227 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 88.0) internal successors, (16984), 193 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:23,227 INFO L186 Difference]: Start difference. First operand has 636 places, 1643 transitions, 31089 flow. Second operand 192 states and 10084 transitions. [2021-12-06 23:01:23,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 3153 transitions, 67103 flow [2021-12-06 23:01:26,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 3153 transitions, 62755 flow, removed 2088 selfloop flow, removed 51 redundant places. [2021-12-06 23:01:26,601 INFO L242 Difference]: Finished difference. Result has 839 places, 2598 transitions, 55146 flow [2021-12-06 23:01:26,603 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=28924, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=55146, PETRI_PLACES=839, PETRI_TRANSITIONS=2598} [2021-12-06 23:01:26,604 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 761 predicate places. [2021-12-06 23:01:26,604 INFO L470 AbstractCegarLoop]: Abstraction has has 839 places, 2598 transitions, 55146 flow [2021-12-06 23:01:26,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 51.13636363636363) internal successors, (2250), 44 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:26,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:01:26,604 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:01:26,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:01:26,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:01:26,805 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:01:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash -847023745, now seen corresponding path program 5 times [2021-12-06 23:01:26,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:26,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934421953] [2021-12-06 23:01:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:26,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:27,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:27,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934421953] [2021-12-06 23:01:27,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934421953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:01:27,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610237708] [2021-12-06 23:01:27,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:01:27,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:01:27,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:01:27,379 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:01:27,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:01:27,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 23:01:27,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:01:27,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 23:01:27,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:01:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:28,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:01:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:35,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610237708] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:01:35,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:01:35,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 18] total 44 [2021-12-06 23:01:35,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849445054] [2021-12-06 23:01:35,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:01:35,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 23:01:35,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 23:01:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 23:01:35,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-06 23:01:35,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 839 places, 2598 transitions, 55146 flow. Second operand has 44 states, 44 states have (on average 51.04545454545455) internal successors, (2246), 44 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:35,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:01:35,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-06 23:01:35,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:01:45,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:47,810 INFO L129 PetriNetUnfolder]: 4008/10961 cut-off events. [2021-12-06 23:03:47,811 INFO L130 PetriNetUnfolder]: For 465668/465668 co-relation queries the response was YES. [2021-12-06 23:03:48,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108263 conditions, 10961 events. 4008/10961 cut-off events. For 465668/465668 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 116417 event pairs, 104 based on Foata normal form. 23/10953 useless extension candidates. Maximal degree in co-relation 108006. Up to 2536 conditions per place. [2021-12-06 23:03:48,079 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 1490 selfloop transitions, 2334 changer transitions 306/4169 dead transitions. [2021-12-06 23:03:48,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 961 places, 4169 transitions, 98006 flow [2021-12-06 23:03:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-12-06 23:03:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-12-06 23:03:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 9502 transitions. [2021-12-06 23:03:48,086 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5965595178302361 [2021-12-06 23:03:48,086 INFO L72 ComplementDD]: Start complementDD. Operand 181 states and 9502 transitions. [2021-12-06 23:03:48,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 181 states and 9502 transitions. [2021-12-06 23:03:48,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:48,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 181 states and 9502 transitions. [2021-12-06 23:03:48,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 182 states, 181 states have (on average 52.49723756906077) internal successors, (9502), 181 states have internal predecessors, (9502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:48,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 182 states, 182 states have (on average 88.0) internal successors, (16016), 182 states have internal predecessors, (16016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:48,107 INFO L81 ComplementDD]: Finished complementDD. Result has 182 states, 182 states have (on average 88.0) internal successors, (16016), 182 states have internal predecessors, (16016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:48,107 INFO L186 Difference]: Start difference. First operand has 839 places, 2598 transitions, 55146 flow. Second operand 181 states and 9502 transitions. [2021-12-06 23:03:48,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 961 places, 4169 transitions, 98006 flow [2021-12-06 23:03:55,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 4169 transitions, 88922 flow, removed 3939 selfloop flow, removed 81 redundant places. [2021-12-06 23:03:55,710 INFO L242 Difference]: Finished difference. Result has 964 places, 3445 transitions, 76974 flow [2021-12-06 23:03:55,712 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=50865, PETRI_DIFFERENCE_MINUEND_PLACES=700, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=181, PETRI_FLOW=76974, PETRI_PLACES=964, PETRI_TRANSITIONS=3445} [2021-12-06 23:03:55,713 INFO L334 CegarLoopForPetriNet]: 78 programPoint places, 886 predicate places. [2021-12-06 23:03:55,713 INFO L470 AbstractCegarLoop]: Abstraction has has 964 places, 3445 transitions, 76974 flow [2021-12-06 23:03:55,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 51.04545454545455) internal successors, (2246), 44 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:55,713 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:03:55,713 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:55,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:03:55,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:03:55,914 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:03:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash 116275063, now seen corresponding path program 6 times [2021-12-06 23:03:55,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933427723] [2021-12-06 23:03:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:55,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:57,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:57,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933427723] [2021-12-06 23:03:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933427723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:57,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922642801] [2021-12-06 23:03:57,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:03:57,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:57,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:57,176 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:57,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4d8c352-f949-4cbb-bd9a-1bfe35b6e59e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:03:57,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 23:03:57,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:03:57,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 23:03:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:59,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:04:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:04:10,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922642801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:04:10,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:04:10,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 50 [2021-12-06 23:04:10,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561559006] [2021-12-06 23:04:10,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:04:10,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 23:04:10,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:04:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 23:04:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2111, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 23:04:10,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2021-12-06 23:04:10,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 964 places, 3445 transitions, 76974 flow. Second operand has 50 states, 50 states have (on average 51.02) internal successors, (2551), 50 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:10,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:04:10,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2021-12-06 23:04:10,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:04:18,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:20,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:22,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:24,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:31,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:33,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:35,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:37,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:49,061 WARN L227 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 156 DAG size of output: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:04:55,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:56,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:58,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:06,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:08,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:09,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:21,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:24,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:29,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:34,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:37,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:39,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []