./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:51:18,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:51:18,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:51:18,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:51:18,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:51:18,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:51:18,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:51:18,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:51:18,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:51:18,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:51:18,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:51:18,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:51:18,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:51:18,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:51:18,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:51:18,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:51:18,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:51:18,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:51:18,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:51:18,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:51:18,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:51:18,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:51:18,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:51:18,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:51:18,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:51:18,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:51:18,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:51:18,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:51:18,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:51:18,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:51:18,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:51:18,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:51:18,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:51:18,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:51:18,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:51:18,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:51:18,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:51:18,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:51:18,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:51:18,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:51:18,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:51:18,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:51:18,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:51:18,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:51:18,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:51:18,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:51:18,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:51:18,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:51:18,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:51:18,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:51:18,919 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:51:18,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:51:18,919 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:51:18,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:51:18,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:51:18,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:51:18,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:51:18,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:51:18,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:51:18,921 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:51:18,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:51:18,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:51:18,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:51:18,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:51:18,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:51:18,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:51:18,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:51:18,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:51:18,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:51:18,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:51:18,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:51:18,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:51:18,925 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:51:18,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:51:18,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:51:18,925 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_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2022-11-20 10:51:19,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:51:19,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:51:19,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:51:19,196 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:51:19,197 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:51:19,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-11-20 10:51:22,306 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:51:22,492 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:51:22,492 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-11-20 10:51:22,499 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/data/36073d53c/1804c439e3834ac3bf4abe58747ae363/FLAGe9cbfa2c2 [2022-11-20 10:51:22,516 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/data/36073d53c/1804c439e3834ac3bf4abe58747ae363 [2022-11-20 10:51:22,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:51:22,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:51:22,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:51:22,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:51:22,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:51:22,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c753882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22, skipping insertion in model container [2022-11-20 10:51:22,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:51:22,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:51:22,746 WARN L237 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_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-11-20 10:51:22,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:51:22,768 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:51:22,798 WARN L237 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_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-11-20 10:51:22,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:51:22,824 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:51:22,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22 WrapperNode [2022-11-20 10:51:22,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:51:22,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:51:22,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:51:22,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:51:22,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,875 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-11-20 10:51:22,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:51:22,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:51:22,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:51:22,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:51:22,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:51:22,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:51:22,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:51:22,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:51:22,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (1/1) ... [2022-11-20 10:51:22,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:51:22,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:22,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:51:22,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:51:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:51:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:51:23,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:51:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:51:23,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:51:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:51:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:51:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:51:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:51:23,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:51:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:51:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:51:23,018 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:51:23,153 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:51:23,155 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:51:23,345 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:51:23,352 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:51:23,353 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:51:23,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:23 BoogieIcfgContainer [2022-11-20 10:51:23,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:51:23,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:51:23,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:51:23,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:51:23,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:51:22" (1/3) ... [2022-11-20 10:51:23,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bec83d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:23, skipping insertion in model container [2022-11-20 10:51:23,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:22" (2/3) ... [2022-11-20 10:51:23,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bec83d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:23, skipping insertion in model container [2022-11-20 10:51:23,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:23" (3/3) ... [2022-11-20 10:51:23,377 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-11-20 10:51:23,386 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:51:23,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:51:23,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:51:23,413 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:51:23,527 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:51:23,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-11-20 10:51:23,617 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-11-20 10:51:23,617 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:51:23,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-20 10:51:23,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-11-20 10:51:23,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-11-20 10:51:23,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:51:23,645 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@76941b2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:51:23,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 10:51:23,670 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-11-20 10:51:23,670 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:51:23,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:23,672 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:23,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1149725056, now seen corresponding path program 1 times [2022-11-20 10:51:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:23,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122206375] [2022-11-20 10:51:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:23,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:23,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:23,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122206375] [2022-11-20 10:51:23,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122206375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:23,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:23,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:51:23,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420507703] [2022-11-20 10:51:23,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:51:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:51:24,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:51:24,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-11-20 10:51:24,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:24,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-11-20 10:51:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:24,042 INFO L130 PetriNetUnfolder]: 2/69 cut-off events. [2022-11-20 10:51:24,045 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 10:51:24,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-11-20 10:51:24,047 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-11-20 10:51:24,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-11-20 10:51:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:51:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:51:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-11-20 10:51:24,063 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-11-20 10:51:24,064 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-11-20 10:51:24,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-11-20 10:51:24,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:24,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-11-20 10:51:24,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,074 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,076 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-11-20 10:51:24,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-11-20 10:51:24,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:51:24,089 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-11-20 10:51:24,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-11-20 10:51:24,095 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-11-20 10:51:24,095 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-11-20 10:51:24,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:24,096 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:24,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:51:24,096 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash 807026320, now seen corresponding path program 1 times [2022-11-20 10:51:24,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:24,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657408000] [2022-11-20 10:51:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:24,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:24,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657408000] [2022-11-20 10:51:24,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657408000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:24,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:24,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:51:24,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164294921] [2022-11-20 10:51:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:51:24,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:51:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:51:24,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-20 10:51:24,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:24,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-20 10:51:24,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:24,899 INFO L130 PetriNetUnfolder]: 61/207 cut-off events. [2022-11-20 10:51:24,899 INFO L131 PetriNetUnfolder]: For 10/22 co-relation queries the response was YES. [2022-11-20 10:51:24,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 207 events. 61/207 cut-off events. For 10/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 706 event pairs, 24 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 346. Up to 84 conditions per place. [2022-11-20 10:51:24,902 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-11-20 10:51:24,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-11-20 10:51:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:51:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:51:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-11-20 10:51:24,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-11-20 10:51:24,908 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-11-20 10:51:24,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-11-20 10:51:24,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:24,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-11-20 10:51:24,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,916 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,916 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-11-20 10:51:24,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-11-20 10:51:24,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:51:24,920 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-11-20 10:51:24,921 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-11-20 10:51:24,922 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-11-20 10:51:24,922 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-11-20 10:51:24,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:24,923 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:24,923 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:24,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:51:24,924 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:24,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash -542410267, now seen corresponding path program 1 times [2022-11-20 10:51:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:24,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454835599] [2022-11-20 10:51:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:24,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:25,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:25,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454835599] [2022-11-20 10:51:25,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454835599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:25,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:25,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:51:25,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17318086] [2022-11-20 10:51:25,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:25,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:51:25,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:25,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:51:25,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:25,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-20 10:51:25,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:25,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-20 10:51:25,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:25,508 INFO L130 PetriNetUnfolder]: 53/200 cut-off events. [2022-11-20 10:51:25,509 INFO L131 PetriNetUnfolder]: For 20/35 co-relation queries the response was YES. [2022-11-20 10:51:25,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 200 events. 53/200 cut-off events. For 20/35 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 711 event pairs, 7 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 364. Up to 58 conditions per place. [2022-11-20 10:51:25,516 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 12 changer transitions 4/92 dead transitions. [2022-11-20 10:51:25,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 92 transitions, 324 flow [2022-11-20 10:51:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:51:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:51:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 420 transitions. [2022-11-20 10:51:25,524 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-20 10:51:25,525 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 420 transitions. [2022-11-20 10:51:25,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 420 transitions. [2022-11-20 10:51:25,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:25,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 420 transitions. [2022-11-20 10:51:25,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,533 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,533 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 7 states and 420 transitions. [2022-11-20 10:51:25,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 92 transitions, 324 flow [2022-11-20 10:51:25,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 311 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-20 10:51:25,539 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 219 flow [2022-11-20 10:51:25,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2022-11-20 10:51:25,542 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-11-20 10:51:25,543 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 219 flow [2022-11-20 10:51:25,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:25,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:25,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:51:25,545 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash 920803105, now seen corresponding path program 2 times [2022-11-20 10:51:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552009911] [2022-11-20 10:51:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:25,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:25,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552009911] [2022-11-20 10:51:25,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552009911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:25,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:25,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:51:25,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681435397] [2022-11-20 10:51:25,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:25,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:51:25,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:51:25,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:25,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-20 10:51:25,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:25,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-20 10:51:25,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:25,870 INFO L130 PetriNetUnfolder]: 50/198 cut-off events. [2022-11-20 10:51:25,871 INFO L131 PetriNetUnfolder]: For 96/102 co-relation queries the response was YES. [2022-11-20 10:51:25,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 198 events. 50/198 cut-off events. For 96/102 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 699 event pairs, 14 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 425. Up to 46 conditions per place. [2022-11-20 10:51:25,874 INFO L137 encePairwiseOnDemand]: 73/84 looper letters, 31 selfloop transitions, 17 changer transitions 4/95 dead transitions. [2022-11-20 10:51:25,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 95 transitions, 400 flow [2022-11-20 10:51:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:51:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:51:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 418 transitions. [2022-11-20 10:51:25,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7108843537414966 [2022-11-20 10:51:25,877 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 418 transitions. [2022-11-20 10:51:25,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 418 transitions. [2022-11-20 10:51:25,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:25,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 418 transitions. [2022-11-20 10:51:25,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.714285714285715) internal successors, (418), 7 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,883 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,883 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 219 flow. Second operand 7 states and 418 transitions. [2022-11-20 10:51:25,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 95 transitions, 400 flow [2022-11-20 10:51:25,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:51:25,888 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 317 flow [2022-11-20 10:51:25,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2022-11-20 10:51:25,889 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-11-20 10:51:25,890 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 317 flow [2022-11-20 10:51:25,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:25,890 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:25,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:51:25,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash 201255641, now seen corresponding path program 1 times [2022-11-20 10:51:25,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:25,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005295328] [2022-11-20 10:51:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:25,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:26,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:26,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005295328] [2022-11-20 10:51:26,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005295328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596089551] [2022-11-20 10:51:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:26,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:26,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:26,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:26,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:51:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:51:26,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:26,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:26,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596089551] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:26,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:26,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-20 10:51:26,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171328275] [2022-11-20 10:51:26,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:26,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:51:26,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:26,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:51:26,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:51:26,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-20 10:51:26,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:26,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:26,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-20 10:51:26,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:26,753 INFO L130 PetriNetUnfolder]: 49/229 cut-off events. [2022-11-20 10:51:26,753 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2022-11-20 10:51:26,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 229 events. 49/229 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 787 event pairs, 17 based on Foata normal form. 7/233 useless extension candidates. Maximal degree in co-relation 599. Up to 79 conditions per place. [2022-11-20 10:51:26,756 INFO L137 encePairwiseOnDemand]: 74/84 looper letters, 48 selfloop transitions, 12 changer transitions 1/104 dead transitions. [2022-11-20 10:51:26,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 559 flow [2022-11-20 10:51:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:51:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-11-20 10:51:26,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-11-20 10:51:26,758 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-11-20 10:51:26,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-11-20 10:51:26,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:26,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-11-20 10:51:26,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:26,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:26,762 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:26,762 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 317 flow. Second operand 6 states and 365 transitions. [2022-11-20 10:51:26,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 559 flow [2022-11-20 10:51:26,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 553 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-20 10:51:26,771 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 380 flow [2022-11-20 10:51:26,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2022-11-20 10:51:26,775 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2022-11-20 10:51:26,775 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 380 flow [2022-11-20 10:51:26,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:26,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:26,776 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:26,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:26,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:26,986 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-11-20 10:51:26,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:26,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049017289] [2022-11-20 10:51:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:27,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:27,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049017289] [2022-11-20 10:51:27,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049017289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:27,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:27,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:51:27,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661416172] [2022-11-20 10:51:27,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:27,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:51:27,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:51:27,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:27,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-20 10:51:27,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:27,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-20 10:51:27,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:27,331 INFO L130 PetriNetUnfolder]: 50/222 cut-off events. [2022-11-20 10:51:27,331 INFO L131 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2022-11-20 10:51:27,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 222 events. 50/222 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 765 event pairs, 13 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 634. Up to 60 conditions per place. [2022-11-20 10:51:27,334 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 41 selfloop transitions, 11 changer transitions 3/98 dead transitions. [2022-11-20 10:51:27,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 567 flow [2022-11-20 10:51:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:51:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:51:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 414 transitions. [2022-11-20 10:51:27,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2022-11-20 10:51:27,337 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 414 transitions. [2022-11-20 10:51:27,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 414 transitions. [2022-11-20 10:51:27,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:27,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 414 transitions. [2022-11-20 10:51:27,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.142857142857146) internal successors, (414), 7 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,341 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,341 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 380 flow. Second operand 7 states and 414 transitions. [2022-11-20 10:51:27,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 567 flow [2022-11-20 10:51:27,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 558 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-20 10:51:27,347 INFO L231 Difference]: Finished difference. Result has 98 places, 84 transitions, 417 flow [2022-11-20 10:51:27,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=417, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2022-11-20 10:51:27,349 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2022-11-20 10:51:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 417 flow [2022-11-20 10:51:27,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:27,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:27,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:51:27,354 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash -946876456, now seen corresponding path program 1 times [2022-11-20 10:51:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:27,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140260529] [2022-11-20 10:51:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:27,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:27,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140260529] [2022-11-20 10:51:27,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140260529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896499568] [2022-11-20 10:51:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:27,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:27,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:27,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:27,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:51:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:27,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:28,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:28,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896499568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:28,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:28,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-11-20 10:51:28,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994510108] [2022-11-20 10:51:28,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:28,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:51:28,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:51:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:51:28,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:28,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 84 transitions, 417 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:28,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:28,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:28,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:31,107 INFO L130 PetriNetUnfolder]: 174/589 cut-off events. [2022-11-20 10:51:31,107 INFO L131 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-11-20 10:51:31,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 589 events. 174/589 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3251 event pairs, 4 based on Foata normal form. 24/610 useless extension candidates. Maximal degree in co-relation 1924. Up to 82 conditions per place. [2022-11-20 10:51:31,113 INFO L137 encePairwiseOnDemand]: 65/84 looper letters, 110 selfloop transitions, 150 changer transitions 5/306 dead transitions. [2022-11-20 10:51:31,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 306 transitions, 2396 flow [2022-11-20 10:51:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 10:51:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-20 10:51:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3404 transitions. [2022-11-20 10:51:31,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6536098310291859 [2022-11-20 10:51:31,122 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3404 transitions. [2022-11-20 10:51:31,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3404 transitions. [2022-11-20 10:51:31,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:31,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3404 transitions. [2022-11-20 10:51:31,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 54.903225806451616) internal successors, (3404), 62 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:31,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:31,146 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:31,146 INFO L175 Difference]: Start difference. First operand has 98 places, 84 transitions, 417 flow. Second operand 62 states and 3404 transitions. [2022-11-20 10:51:31,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 306 transitions, 2396 flow [2022-11-20 10:51:31,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 306 transitions, 2298 flow, removed 42 selfloop flow, removed 4 redundant places. [2022-11-20 10:51:31,159 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 1781 flow [2022-11-20 10:51:31,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=1781, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2022-11-20 10:51:31,160 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 105 predicate places. [2022-11-20 10:51:31,160 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 1781 flow [2022-11-20 10:51:31,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:31,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:31,161 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:31,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 10:51:31,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:31,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1773717672, now seen corresponding path program 2 times [2022-11-20 10:51:31,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:31,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401639447] [2022-11-20 10:51:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:31,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:31,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401639447] [2022-11-20 10:51:31,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401639447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853703316] [2022-11-20 10:51:31,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:31,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:31,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:31,647 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:31,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:51:31,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:31,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:32,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:32,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853703316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:32,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:51:32,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-20 10:51:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856741922] [2022-11-20 10:51:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:32,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:51:32,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:51:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:51:32,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:32,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 1781 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:32,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:32,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:32,791 INFO L130 PetriNetUnfolder]: 232/733 cut-off events. [2022-11-20 10:51:32,791 INFO L131 PetriNetUnfolder]: For 4824/4824 co-relation queries the response was YES. [2022-11-20 10:51:32,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 733 events. 232/733 cut-off events. For 4824/4824 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4374 event pairs, 36 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 3256. Up to 426 conditions per place. [2022-11-20 10:51:32,802 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 213 selfloop transitions, 72 changer transitions 4/330 dead transitions. [2022-11-20 10:51:32,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 330 transitions, 3461 flow [2022-11-20 10:51:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:51:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:51:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1004 transitions. [2022-11-20 10:51:32,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2022-11-20 10:51:32,806 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1004 transitions. [2022-11-20 10:51:32,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1004 transitions. [2022-11-20 10:51:32,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:32,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1004 transitions. [2022-11-20 10:51:32,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.77777777777778) internal successors, (1004), 18 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,813 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,813 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 1781 flow. Second operand 18 states and 1004 transitions. [2022-11-20 10:51:32,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 330 transitions, 3461 flow [2022-11-20 10:51:32,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 330 transitions, 3111 flow, removed 163 selfloop flow, removed 8 redundant places. [2022-11-20 10:51:32,870 INFO L231 Difference]: Finished difference. Result has 195 places, 281 transitions, 2343 flow [2022-11-20 10:51:32,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2343, PETRI_PLACES=195, PETRI_TRANSITIONS=281} [2022-11-20 10:51:32,873 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 121 predicate places. [2022-11-20 10:51:32,875 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 281 transitions, 2343 flow [2022-11-20 10:51:32,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:32,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:32,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:33,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:33,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:33,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1203830056, now seen corresponding path program 3 times [2022-11-20 10:51:33,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:33,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24123229] [2022-11-20 10:51:33,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:33,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:33,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24123229] [2022-11-20 10:51:33,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24123229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:33,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127053085] [2022-11-20 10:51:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:33,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:33,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:33,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:33,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:51:33,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:51:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:33,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:33,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127053085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:33,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:51:33,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-20 10:51:33,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376138110] [2022-11-20 10:51:33,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:33,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:51:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:33,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:51:33,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:51:33,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:33,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 281 transitions, 2343 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:33,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:33,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:33,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:34,796 INFO L130 PetriNetUnfolder]: 312/949 cut-off events. [2022-11-20 10:51:34,796 INFO L131 PetriNetUnfolder]: For 5638/5638 co-relation queries the response was YES. [2022-11-20 10:51:34,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4318 conditions, 949 events. 312/949 cut-off events. For 5638/5638 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6113 event pairs, 41 based on Foata normal form. 1/938 useless extension candidates. Maximal degree in co-relation 4271. Up to 557 conditions per place. [2022-11-20 10:51:34,809 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 271 selfloop transitions, 96 changer transitions 4/412 dead transitions. [2022-11-20 10:51:34,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 412 transitions, 4325 flow [2022-11-20 10:51:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:51:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 10:51:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2022-11-20 10:51:34,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6604308390022676 [2022-11-20 10:51:34,813 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2022-11-20 10:51:34,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2022-11-20 10:51:34,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:34,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2022-11-20 10:51:34,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:34,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:34,822 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:34,822 INFO L175 Difference]: Start difference. First operand has 195 places, 281 transitions, 2343 flow. Second operand 21 states and 1165 transitions. [2022-11-20 10:51:34,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 412 transitions, 4325 flow [2022-11-20 10:51:34,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 412 transitions, 4311 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-20 10:51:34,877 INFO L231 Difference]: Finished difference. Result has 218 places, 357 transitions, 3446 flow [2022-11-20 10:51:34,877 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3446, PETRI_PLACES=218, PETRI_TRANSITIONS=357} [2022-11-20 10:51:34,878 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 144 predicate places. [2022-11-20 10:51:34,878 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 357 transitions, 3446 flow [2022-11-20 10:51:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:34,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:34,895 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:34,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:35,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 10:51:35,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash 186380408, now seen corresponding path program 4 times [2022-11-20 10:51:35,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:35,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335896762] [2022-11-20 10:51:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:35,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:35,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:35,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335896762] [2022-11-20 10:51:35,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335896762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:35,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:35,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 10:51:35,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913785223] [2022-11-20 10:51:35,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:35,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:51:35,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:51:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:51:35,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:35,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 357 transitions, 3446 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:35,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:35,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:35,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:35,971 INFO L130 PetriNetUnfolder]: 356/1063 cut-off events. [2022-11-20 10:51:35,971 INFO L131 PetriNetUnfolder]: For 7309/7309 co-relation queries the response was YES. [2022-11-20 10:51:35,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 1063 events. 356/1063 cut-off events. For 7309/7309 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7029 event pairs, 52 based on Foata normal form. 1/1048 useless extension candidates. Maximal degree in co-relation 5254. Up to 550 conditions per place. [2022-11-20 10:51:35,986 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 263 selfloop transitions, 158 changer transitions 6/468 dead transitions. [2022-11-20 10:51:35,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 468 transitions, 5513 flow [2022-11-20 10:51:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:51:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-20 10:51:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-11-20 10:51:35,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-11-20 10:51:35,989 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-11-20 10:51:35,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-11-20 10:51:35,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:35,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-11-20 10:51:35,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:35,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:35,998 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:35,998 INFO L175 Difference]: Start difference. First operand has 218 places, 357 transitions, 3446 flow. Second operand 15 states and 824 transitions. [2022-11-20 10:51:35,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 468 transitions, 5513 flow [2022-11-20 10:51:36,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 468 transitions, 5399 flow, removed 42 selfloop flow, removed 7 redundant places. [2022-11-20 10:51:36,063 INFO L231 Difference]: Finished difference. Result has 234 places, 433 transitions, 4871 flow [2022-11-20 10:51:36,065 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4871, PETRI_PLACES=234, PETRI_TRANSITIONS=433} [2022-11-20 10:51:36,065 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 160 predicate places. [2022-11-20 10:51:36,066 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 433 transitions, 4871 flow [2022-11-20 10:51:36,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:36,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:36,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:36,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:51:36,067 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1350271786, now seen corresponding path program 5 times [2022-11-20 10:51:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:36,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429889482] [2022-11-20 10:51:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:36,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:36,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429889482] [2022-11-20 10:51:36,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429889482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986975865] [2022-11-20 10:51:36,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:51:36,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:36,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:36,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:51:36,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:51:36,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:51:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:36,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:37,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986975865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:37,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:37,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-11-20 10:51:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506114210] [2022-11-20 10:51:37,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:37,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:51:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:51:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:51:37,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:37,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 433 transitions, 4871 flow. Second operand has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:37,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:37,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:37,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:38,155 INFO L130 PetriNetUnfolder]: 493/1394 cut-off events. [2022-11-20 10:51:38,156 INFO L131 PetriNetUnfolder]: For 10884/10884 co-relation queries the response was YES. [2022-11-20 10:51:38,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7692 conditions, 1394 events. 493/1394 cut-off events. For 10884/10884 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9767 event pairs, 34 based on Foata normal form. 1/1383 useless extension candidates. Maximal degree in co-relation 7626. Up to 444 conditions per place. [2022-11-20 10:51:38,183 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 202 selfloop transitions, 442 changer transitions 22/707 dead transitions. [2022-11-20 10:51:38,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 707 transitions, 9305 flow [2022-11-20 10:51:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:51:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-20 10:51:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1522 transitions. [2022-11-20 10:51:38,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6471088435374149 [2022-11-20 10:51:38,186 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1522 transitions. [2022-11-20 10:51:38,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1522 transitions. [2022-11-20 10:51:38,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:38,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1522 transitions. [2022-11-20 10:51:38,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.357142857142854) internal successors, (1522), 28 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,195 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,195 INFO L175 Difference]: Start difference. First operand has 234 places, 433 transitions, 4871 flow. Second operand 28 states and 1522 transitions. [2022-11-20 10:51:38,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 707 transitions, 9305 flow [2022-11-20 10:51:38,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 707 transitions, 9131 flow, removed 87 selfloop flow, removed 3 redundant places. [2022-11-20 10:51:38,380 INFO L231 Difference]: Finished difference. Result has 270 places, 636 transitions, 8547 flow [2022-11-20 10:51:38,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4755, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8547, PETRI_PLACES=270, PETRI_TRANSITIONS=636} [2022-11-20 10:51:38,381 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 196 predicate places. [2022-11-20 10:51:38,381 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 636 transitions, 8547 flow [2022-11-20 10:51:38,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:38,382 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:38,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:38,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:38,588 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1996851174, now seen corresponding path program 6 times [2022-11-20 10:51:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:38,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046790755] [2022-11-20 10:51:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:38,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:38,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046790755] [2022-11-20 10:51:38,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046790755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:38,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693554381] [2022-11-20 10:51:38,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:51:38,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:38,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:38,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:38,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:51:38,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:51:38,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:38,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:38,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:39,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:39,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693554381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:39,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:51:39,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-20 10:51:39,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265772286] [2022-11-20 10:51:39,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:39,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:51:39,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:39,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:51:39,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:51:39,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:39,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 636 transitions, 8547 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:39,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:39,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:39,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:40,526 INFO L130 PetriNetUnfolder]: 648/1770 cut-off events. [2022-11-20 10:51:40,527 INFO L131 PetriNetUnfolder]: For 17440/17440 co-relation queries the response was YES. [2022-11-20 10:51:40,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11260 conditions, 1770 events. 648/1770 cut-off events. For 17440/17440 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13008 event pairs, 57 based on Foata normal form. 1/1750 useless extension candidates. Maximal degree in co-relation 11181. Up to 1097 conditions per place. [2022-11-20 10:51:40,564 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 669 selfloop transitions, 170 changer transitions 4/884 dead transitions. [2022-11-20 10:51:40,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 884 transitions, 14042 flow [2022-11-20 10:51:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:51:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-20 10:51:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-11-20 10:51:40,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-11-20 10:51:40,569 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-11-20 10:51:40,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-11-20 10:51:40,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:40,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-11-20 10:51:40,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:40,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:40,575 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:40,575 INFO L175 Difference]: Start difference. First operand has 270 places, 636 transitions, 8547 flow. Second operand 16 states and 910 transitions. [2022-11-20 10:51:40,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 884 transitions, 14042 flow [2022-11-20 10:51:40,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 884 transitions, 12889 flow, removed 171 selfloop flow, removed 17 redundant places. [2022-11-20 10:51:40,807 INFO L231 Difference]: Finished difference. Result has 268 places, 775 transitions, 10616 flow [2022-11-20 10:51:40,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10616, PETRI_PLACES=268, PETRI_TRANSITIONS=775} [2022-11-20 10:51:40,808 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 194 predicate places. [2022-11-20 10:51:40,808 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 775 transitions, 10616 flow [2022-11-20 10:51:40,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:40,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:40,809 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:40,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 10:51:41,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:51:41,014 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1099232000, now seen corresponding path program 7 times [2022-11-20 10:51:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:41,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696061414] [2022-11-20 10:51:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:41,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:41,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:41,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696061414] [2022-11-20 10:51:41,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696061414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:41,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960595984] [2022-11-20 10:51:41,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:51:41,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:41,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:51:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:41,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:41,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960595984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:41,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:51:41,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-20 10:51:41,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122322290] [2022-11-20 10:51:41,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:41,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:51:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:51:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:51:41,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:41,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 775 transitions, 10616 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:41,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:41,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:41,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:43,011 INFO L130 PetriNetUnfolder]: 754/2051 cut-off events. [2022-11-20 10:51:43,011 INFO L131 PetriNetUnfolder]: For 19063/19063 co-relation queries the response was YES. [2022-11-20 10:51:43,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12880 conditions, 2051 events. 754/2051 cut-off events. For 19063/19063 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15800 event pairs, 82 based on Foata normal form. 1/2025 useless extension candidates. Maximal degree in co-relation 12799. Up to 1421 conditions per place. [2022-11-20 10:51:43,056 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 754 selfloop transitions, 147 changer transitions 4/946 dead transitions. [2022-11-20 10:51:43,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 946 transitions, 14840 flow [2022-11-20 10:51:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:51:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:51:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-11-20 10:51:43,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-11-20 10:51:43,059 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-11-20 10:51:43,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-11-20 10:51:43,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:43,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-11-20 10:51:43,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:43,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:43,065 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:43,065 INFO L175 Difference]: Start difference. First operand has 268 places, 775 transitions, 10616 flow. Second operand 18 states and 1006 transitions. [2022-11-20 10:51:43,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 946 transitions, 14840 flow [2022-11-20 10:51:43,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 946 transitions, 14537 flow, removed 133 selfloop flow, removed 7 redundant places. [2022-11-20 10:51:43,324 INFO L231 Difference]: Finished difference. Result has 285 places, 885 transitions, 12648 flow [2022-11-20 10:51:43,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12648, PETRI_PLACES=285, PETRI_TRANSITIONS=885} [2022-11-20 10:51:43,325 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 211 predicate places. [2022-11-20 10:51:43,325 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 885 transitions, 12648 flow [2022-11-20 10:51:43,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:43,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:43,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:43,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:51:43,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1566346522, now seen corresponding path program 8 times [2022-11-20 10:51:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:43,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591838108] [2022-11-20 10:51:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:43,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:43,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:43,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591838108] [2022-11-20 10:51:43,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591838108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:43,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482065043] [2022-11-20 10:51:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:43,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:43,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:43,780 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:43,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:51:43,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:44,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:44,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482065043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:44,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:51:44,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-20 10:51:44,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771999888] [2022-11-20 10:51:44,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:44,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:51:44,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:51:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:51:44,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:44,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 885 transitions, 12648 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:44,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:44,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:44,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:45,698 INFO L130 PetriNetUnfolder]: 863/2328 cut-off events. [2022-11-20 10:51:45,698 INFO L131 PetriNetUnfolder]: For 23712/23712 co-relation queries the response was YES. [2022-11-20 10:51:45,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15320 conditions, 2328 events. 863/2328 cut-off events. For 23712/23712 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18529 event pairs, 87 based on Foata normal form. 1/2295 useless extension candidates. Maximal degree in co-relation 15232. Up to 1642 conditions per place. [2022-11-20 10:51:45,739 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 852 selfloop transitions, 169 changer transitions 4/1066 dead transitions. [2022-11-20 10:51:45,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1066 transitions, 17666 flow [2022-11-20 10:51:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:51:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 10:51:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1163 transitions. [2022-11-20 10:51:45,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.659297052154195 [2022-11-20 10:51:45,743 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1163 transitions. [2022-11-20 10:51:45,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1163 transitions. [2022-11-20 10:51:45,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:45,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1163 transitions. [2022-11-20 10:51:45,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:45,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:45,758 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:45,758 INFO L175 Difference]: Start difference. First operand has 285 places, 885 transitions, 12648 flow. Second operand 21 states and 1163 transitions. [2022-11-20 10:51:45,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1066 transitions, 17666 flow [2022-11-20 10:51:46,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1066 transitions, 17236 flow, removed 185 selfloop flow, removed 8 redundant places. [2022-11-20 10:51:46,071 INFO L231 Difference]: Finished difference. Result has 305 places, 1005 transitions, 15083 flow [2022-11-20 10:51:46,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12272, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15083, PETRI_PLACES=305, PETRI_TRANSITIONS=1005} [2022-11-20 10:51:46,072 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 231 predicate places. [2022-11-20 10:51:46,072 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1005 transitions, 15083 flow [2022-11-20 10:51:46,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:46,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:46,073 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:46,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:46,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:46,274 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:46,274 INFO L85 PathProgramCache]: Analyzing trace with hash -613700161, now seen corresponding path program 9 times [2022-11-20 10:51:46,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604891923] [2022-11-20 10:51:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:46,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:46,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604891923] [2022-11-20 10:51:46,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604891923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:46,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813075740] [2022-11-20 10:51:46,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:46,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:46,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:46,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:46,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:51:46,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:51:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:46,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:47,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813075740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:47,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:47,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-20 10:51:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509681910] [2022-11-20 10:51:47,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:51:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:51:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:51:47,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:47,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1005 transitions, 15083 flow. Second operand has 20 states, 20 states have (on average 53.8) internal successors, (1076), 20 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:47,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:47,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:47,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:49,079 INFO L130 PetriNetUnfolder]: 1033/2762 cut-off events. [2022-11-20 10:51:49,079 INFO L131 PetriNetUnfolder]: For 30374/30388 co-relation queries the response was YES. [2022-11-20 10:51:49,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18380 conditions, 2762 events. 1033/2762 cut-off events. For 30374/30388 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22873 event pairs, 43 based on Foata normal form. 14/2758 useless extension candidates. Maximal degree in co-relation 18283. Up to 903 conditions per place. [2022-11-20 10:51:49,134 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 791 selfloop transitions, 455 changer transitions 0/1287 dead transitions. [2022-11-20 10:51:49,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1287 transitions, 21280 flow [2022-11-20 10:51:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:51:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-20 10:51:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1127 transitions. [2022-11-20 10:51:49,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2022-11-20 10:51:49,138 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1127 transitions. [2022-11-20 10:51:49,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1127 transitions. [2022-11-20 10:51:49,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:49,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1127 transitions. [2022-11-20 10:51:49,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.35) internal successors, (1127), 20 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:49,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:49,145 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:49,145 INFO L175 Difference]: Start difference. First operand has 305 places, 1005 transitions, 15083 flow. Second operand 20 states and 1127 transitions. [2022-11-20 10:51:49,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1287 transitions, 21280 flow [2022-11-20 10:51:49,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1287 transitions, 20662 flow, removed 291 selfloop flow, removed 7 redundant places. [2022-11-20 10:51:49,479 INFO L231 Difference]: Finished difference. Result has 326 places, 1163 transitions, 18690 flow [2022-11-20 10:51:49,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=14473, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18690, PETRI_PLACES=326, PETRI_TRANSITIONS=1163} [2022-11-20 10:51:49,482 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 252 predicate places. [2022-11-20 10:51:49,483 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1163 transitions, 18690 flow [2022-11-20 10:51:49,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.8) internal successors, (1076), 20 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:49,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:49,484 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:49,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 10:51:49,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:51:49,689 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1312073183, now seen corresponding path program 10 times [2022-11-20 10:51:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382462843] [2022-11-20 10:51:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:49,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:49,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:49,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382462843] [2022-11-20 10:51:49,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382462843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:49,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012764768] [2022-11-20 10:51:49,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:51:49,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:49,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:49,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:49,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:51:49,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:51:49,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:51:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:50,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012764768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:50,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:50,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-20 10:51:50,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283887429] [2022-11-20 10:51:50,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:50,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:51:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:51:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:51:50,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:50,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1163 transitions, 18690 flow. Second operand has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:50,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:50,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:50,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:52,361 INFO L130 PetriNetUnfolder]: 1107/2942 cut-off events. [2022-11-20 10:51:52,361 INFO L131 PetriNetUnfolder]: For 42498/42498 co-relation queries the response was YES. [2022-11-20 10:51:52,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 2942 events. 1107/2942 cut-off events. For 42498/42498 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24629 event pairs, 71 based on Foata normal form. 2/2911 useless extension candidates. Maximal degree in co-relation 21261. Up to 1612 conditions per place. [2022-11-20 10:51:52,408 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 930 selfloop transitions, 362 changer transitions 12/1345 dead transitions. [2022-11-20 10:51:52,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1345 transitions, 23894 flow [2022-11-20 10:51:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:51:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:51:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1004 transitions. [2022-11-20 10:51:52,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2022-11-20 10:51:52,411 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1004 transitions. [2022-11-20 10:51:52,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1004 transitions. [2022-11-20 10:51:52,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:52,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1004 transitions. [2022-11-20 10:51:52,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.77777777777778) internal successors, (1004), 18 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:52,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:52,418 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:52,418 INFO L175 Difference]: Start difference. First operand has 326 places, 1163 transitions, 18690 flow. Second operand 18 states and 1004 transitions. [2022-11-20 10:51:52,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1345 transitions, 23894 flow [2022-11-20 10:51:52,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1345 transitions, 23544 flow, removed 157 selfloop flow, removed 6 redundant places. [2022-11-20 10:51:52,893 INFO L231 Difference]: Finished difference. Result has 344 places, 1238 transitions, 21062 flow [2022-11-20 10:51:52,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=18344, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21062, PETRI_PLACES=344, PETRI_TRANSITIONS=1238} [2022-11-20 10:51:52,894 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 270 predicate places. [2022-11-20 10:51:52,894 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1238 transitions, 21062 flow [2022-11-20 10:51:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:52,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:52,895 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:52,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:53,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:53,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1339676861, now seen corresponding path program 11 times [2022-11-20 10:51:53,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:53,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394119334] [2022-11-20 10:51:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:53,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394119334] [2022-11-20 10:51:53,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394119334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26207298] [2022-11-20 10:51:53,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:51:53,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:53,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:53,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:51:53,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:53,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:53,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:53,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:53,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:53,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26207298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:53,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:53,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-20 10:51:53,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333180] [2022-11-20 10:51:53,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:53,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:51:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:51:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:51:53,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:53,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1238 transitions, 21062 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:53,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:53,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:53,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:51:57,125 INFO L130 PetriNetUnfolder]: 1477/3889 cut-off events. [2022-11-20 10:51:57,125 INFO L131 PetriNetUnfolder]: For 72823/72823 co-relation queries the response was YES. [2022-11-20 10:51:57,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30669 conditions, 3889 events. 1477/3889 cut-off events. For 72823/72823 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33593 event pairs, 64 based on Foata normal form. 14/3876 useless extension candidates. Maximal degree in co-relation 30556. Up to 992 conditions per place. [2022-11-20 10:51:57,190 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 709 selfloop transitions, 1069 changer transitions 26/1845 dead transitions. [2022-11-20 10:51:57,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1845 transitions, 35908 flow [2022-11-20 10:51:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:51:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 10:51:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2165 transitions. [2022-11-20 10:51:57,194 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6608669108669109 [2022-11-20 10:51:57,194 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2165 transitions. [2022-11-20 10:51:57,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2165 transitions. [2022-11-20 10:51:57,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:57,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2165 transitions. [2022-11-20 10:51:57,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.51282051282051) internal successors, (2165), 39 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:57,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:57,205 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:57,205 INFO L175 Difference]: Start difference. First operand has 344 places, 1238 transitions, 21062 flow. Second operand 39 states and 2165 transitions. [2022-11-20 10:51:57,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1845 transitions, 35908 flow [2022-11-20 10:51:57,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1845 transitions, 35490 flow, removed 72 selfloop flow, removed 13 redundant places. [2022-11-20 10:51:58,016 INFO L231 Difference]: Finished difference. Result has 392 places, 1662 transitions, 33601 flow [2022-11-20 10:51:58,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20683, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=675, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=33601, PETRI_PLACES=392, PETRI_TRANSITIONS=1662} [2022-11-20 10:51:58,018 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 318 predicate places. [2022-11-20 10:51:58,018 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1662 transitions, 33601 flow [2022-11-20 10:51:58,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:58,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:58,019 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:58,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:58,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:51:58,225 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:51:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash 923816933, now seen corresponding path program 12 times [2022-11-20 10:51:58,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:58,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248765408] [2022-11-20 10:51:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:58,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:58,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248765408] [2022-11-20 10:51:58,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248765408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323380489] [2022-11-20 10:51:58,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:51:58,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:58,403 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:58,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:51:58,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:51:58,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:58,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:58,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:58,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323380489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:58,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:58,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-20 10:51:58,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226115242] [2022-11-20 10:51:58,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:58,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:51:58,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:58,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:51:58,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:51:58,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:51:58,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1662 transitions, 33601 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:58,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:58,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:51:58,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:52:04,462 INFO L130 PetriNetUnfolder]: 1926/5203 cut-off events. [2022-11-20 10:52:04,462 INFO L131 PetriNetUnfolder]: For 120334/120363 co-relation queries the response was YES. [2022-11-20 10:52:04,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45199 conditions, 5203 events. 1926/5203 cut-off events. For 120334/120363 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 47303 event pairs, 27 based on Foata normal form. 43/5240 useless extension candidates. Maximal degree in co-relation 45066. Up to 1189 conditions per place. [2022-11-20 10:52:04,559 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 1139 selfloop transitions, 1224 changer transitions 2/2406 dead transitions. [2022-11-20 10:52:04,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 2406 transitions, 53111 flow [2022-11-20 10:52:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 10:52:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-20 10:52:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3928 transitions. [2022-11-20 10:52:04,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6586183769282361 [2022-11-20 10:52:04,567 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3928 transitions. [2022-11-20 10:52:04,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3928 transitions. [2022-11-20 10:52:04,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:52:04,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3928 transitions. [2022-11-20 10:52:04,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 55.32394366197183) internal successors, (3928), 71 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,586 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,587 INFO L175 Difference]: Start difference. First operand has 392 places, 1662 transitions, 33601 flow. Second operand 71 states and 3928 transitions. [2022-11-20 10:52:04,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 2406 transitions, 53111 flow [2022-11-20 10:52:06,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2406 transitions, 51897 flow, removed 587 selfloop flow, removed 8 redundant places. [2022-11-20 10:52:06,387 INFO L231 Difference]: Finished difference. Result has 488 places, 2225 transitions, 49344 flow [2022-11-20 10:52:06,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=32691, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=751, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=49344, PETRI_PLACES=488, PETRI_TRANSITIONS=2225} [2022-11-20 10:52:06,389 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 414 predicate places. [2022-11-20 10:52:06,389 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 2225 transitions, 49344 flow [2022-11-20 10:52:06,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:06,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:52:06,390 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:06,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:52:06,595 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:52:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1222382439, now seen corresponding path program 13 times [2022-11-20 10:52:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679347732] [2022-11-20 10:52:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679347732] [2022-11-20 10:52:06,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679347732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:06,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879168007] [2022-11-20 10:52:06,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:52:06,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:06,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:06,802 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:06,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:52:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:52:06,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:07,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:07,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879168007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:07,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:07,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-20 10:52:07,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110078177] [2022-11-20 10:52:07,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:07,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:52:07,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:52:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:52:07,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:52:07,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 2225 transitions, 49344 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:07,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:52:07,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:52:07,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:52:13,669 INFO L130 PetriNetUnfolder]: 2100/5423 cut-off events. [2022-11-20 10:52:13,669 INFO L131 PetriNetUnfolder]: For 142409/142428 co-relation queries the response was YES. [2022-11-20 10:52:13,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51953 conditions, 5423 events. 2100/5423 cut-off events. For 142409/142428 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 48815 event pairs, 87 based on Foata normal form. 10/5384 useless extension candidates. Maximal degree in co-relation 51787. Up to 1624 conditions per place. [2022-11-20 10:52:13,851 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 1302 selfloop transitions, 1264 changer transitions 5/2612 dead transitions. [2022-11-20 10:52:13,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2612 transitions, 63217 flow [2022-11-20 10:52:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:52:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 10:52:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2179 transitions. [2022-11-20 10:52:13,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6651404151404151 [2022-11-20 10:52:13,857 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2179 transitions. [2022-11-20 10:52:13,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2179 transitions. [2022-11-20 10:52:13,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:52:13,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2179 transitions. [2022-11-20 10:52:13,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.87179487179487) internal successors, (2179), 39 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:13,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:13,871 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:13,872 INFO L175 Difference]: Start difference. First operand has 488 places, 2225 transitions, 49344 flow. Second operand 39 states and 2179 transitions. [2022-11-20 10:52:13,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2612 transitions, 63217 flow [2022-11-20 10:52:16,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 2612 transitions, 60102 flow, removed 1491 selfloop flow, removed 10 redundant places. [2022-11-20 10:52:16,676 INFO L231 Difference]: Finished difference. Result has 522 places, 2405 transitions, 55186 flow [2022-11-20 10:52:16,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=46126, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=55186, PETRI_PLACES=522, PETRI_TRANSITIONS=2405} [2022-11-20 10:52:16,678 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 448 predicate places. [2022-11-20 10:52:16,678 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 2405 transitions, 55186 flow [2022-11-20 10:52:16,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:16,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:52:16,679 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:16,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:16,879 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:52:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1066815339, now seen corresponding path program 14 times [2022-11-20 10:52:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:16,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321056228] [2022-11-20 10:52:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:16,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:17,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:17,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321056228] [2022-11-20 10:52:17,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321056228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:17,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531769269] [2022-11-20 10:52:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:17,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:17,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:17,057 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:17,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:52:17,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:52:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:17,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:52:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:17,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:17,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531769269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:17,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:17,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-20 10:52:17,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162432254] [2022-11-20 10:52:17,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:17,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:52:17,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:52:17,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:52:17,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:52:17,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 2405 transitions, 55186 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:17,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:52:17,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:52:17,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:52:26,182 INFO L130 PetriNetUnfolder]: 2373/6325 cut-off events. [2022-11-20 10:52:26,182 INFO L131 PetriNetUnfolder]: For 178048/178077 co-relation queries the response was YES. [2022-11-20 10:52:26,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60599 conditions, 6325 events. 2373/6325 cut-off events. For 178048/178077 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 59636 event pairs, 37 based on Foata normal form. 42/6361 useless extension candidates. Maximal degree in co-relation 60428. Up to 1851 conditions per place. [2022-11-20 10:52:26,290 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 1531 selfloop transitions, 1332 changer transitions 0/2904 dead transitions. [2022-11-20 10:52:26,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 2904 transitions, 72786 flow [2022-11-20 10:52:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-20 10:52:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-20 10:52:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3085 transitions. [2022-11-20 10:52:26,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6558248299319728 [2022-11-20 10:52:26,300 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3085 transitions. [2022-11-20 10:52:26,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3085 transitions. [2022-11-20 10:52:26,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:52:26,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3085 transitions. [2022-11-20 10:52:26,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 55.089285714285715) internal successors, (3085), 56 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:26,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:26,314 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:26,314 INFO L175 Difference]: Start difference. First operand has 522 places, 2405 transitions, 55186 flow. Second operand 56 states and 3085 transitions. [2022-11-20 10:52:26,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 2904 transitions, 72786 flow [2022-11-20 10:52:29,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2904 transitions, 71657 flow, removed 199 selfloop flow, removed 20 redundant places. [2022-11-20 10:52:29,374 INFO L231 Difference]: Finished difference. Result has 583 places, 2750 transitions, 67980 flow [2022-11-20 10:52:29,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=54114, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=67980, PETRI_PLACES=583, PETRI_TRANSITIONS=2750} [2022-11-20 10:52:29,375 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 509 predicate places. [2022-11-20 10:52:29,376 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2750 transitions, 67980 flow [2022-11-20 10:52:29,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:29,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:52:29,376 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:29,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:29,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:29,582 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:52:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1696804425, now seen corresponding path program 15 times [2022-11-20 10:52:29,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:29,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148399062] [2022-11-20 10:52:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:29,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:29,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148399062] [2022-11-20 10:52:29,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148399062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540036696] [2022-11-20 10:52:29,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:52:29,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:29,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:29,763 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:29,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:52:29,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:52:29,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:29,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:52:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:30,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:30,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540036696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:30,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:30,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-20 10:52:30,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881862883] [2022-11-20 10:52:30,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:30,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:52:30,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:52:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:52:30,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:52:30,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2750 transitions, 67980 flow. Second operand has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:30,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:52:30,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:52:30,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:52:39,726 INFO L130 PetriNetUnfolder]: 2586/7042 cut-off events. [2022-11-20 10:52:39,726 INFO L131 PetriNetUnfolder]: For 238413/238432 co-relation queries the response was YES. [2022-11-20 10:52:39,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71889 conditions, 7042 events. 2586/7042 cut-off events. For 238413/238432 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 68479 event pairs, 208 based on Foata normal form. 38/6990 useless extension candidates. Maximal degree in co-relation 71692. Up to 2875 conditions per place. [2022-11-20 10:52:39,954 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2029 selfloop transitions, 1164 changer transitions 2/3236 dead transitions. [2022-11-20 10:52:39,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 3236 transitions, 86224 flow [2022-11-20 10:52:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 10:52:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-20 10:52:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2331 transitions. [2022-11-20 10:52:39,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2022-11-20 10:52:39,960 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2331 transitions. [2022-11-20 10:52:39,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2331 transitions. [2022-11-20 10:52:39,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:52:39,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2331 transitions. [2022-11-20 10:52:39,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.5) internal successors, (2331), 42 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:39,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:39,973 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:39,974 INFO L175 Difference]: Start difference. First operand has 583 places, 2750 transitions, 67980 flow. Second operand 42 states and 2331 transitions. [2022-11-20 10:52:39,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 3236 transitions, 86224 flow [2022-11-20 10:52:43,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 3236 transitions, 83117 flow, removed 981 selfloop flow, removed 12 redundant places. [2022-11-20 10:52:44,073 INFO L231 Difference]: Finished difference. Result has 635 places, 3110 transitions, 78635 flow [2022-11-20 10:52:44,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=65021, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=78635, PETRI_PLACES=635, PETRI_TRANSITIONS=3110} [2022-11-20 10:52:44,076 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 561 predicate places. [2022-11-20 10:52:44,076 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 3110 transitions, 78635 flow [2022-11-20 10:52:44,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:44,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:52:44,077 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:44,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:44,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:44,287 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:52:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash 770996869, now seen corresponding path program 16 times [2022-11-20 10:52:44,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:44,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693952070] [2022-11-20 10:52:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:44,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:44,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:44,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693952070] [2022-11-20 10:52:44,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693952070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072662127] [2022-11-20 10:52:44,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:52:44,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:44,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:44,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:52:44,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:52:44,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:52:44,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:44,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:45,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072662127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:45,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:45,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-20 10:52:45,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305002628] [2022-11-20 10:52:45,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:45,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:52:45,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:45,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:52:45,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:52:45,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:52:45,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 3110 transitions, 78635 flow. Second operand has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:45,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:52:45,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:52:45,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:52:57,270 INFO L130 PetriNetUnfolder]: 3078/8114 cut-off events. [2022-11-20 10:52:57,270 INFO L131 PetriNetUnfolder]: For 309718/309747 co-relation queries the response was YES. [2022-11-20 10:52:57,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88078 conditions, 8114 events. 3078/8114 cut-off events. For 309718/309747 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79452 event pairs, 213 based on Foata normal form. 22/8046 useless extension candidates. Maximal degree in co-relation 87860. Up to 4263 conditions per place. [2022-11-20 10:52:57,558 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 2646 selfloop transitions, 1234 changer transitions 35/3956 dead transitions. [2022-11-20 10:52:57,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 3956 transitions, 110526 flow [2022-11-20 10:52:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 10:52:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-20 10:52:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2213 transitions. [2022-11-20 10:52:57,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6586309523809524 [2022-11-20 10:52:57,563 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2213 transitions. [2022-11-20 10:52:57,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2213 transitions. [2022-11-20 10:52:57,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:52:57,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2213 transitions. [2022-11-20 10:52:57,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.325) internal successors, (2213), 40 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:57,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:57,573 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:57,573 INFO L175 Difference]: Start difference. First operand has 635 places, 3110 transitions, 78635 flow. Second operand 40 states and 2213 transitions. [2022-11-20 10:52:57,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 3956 transitions, 110526 flow [2022-11-20 10:53:03,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 3956 transitions, 107464 flow, removed 1013 selfloop flow, removed 9 redundant places. [2022-11-20 10:53:03,534 INFO L231 Difference]: Finished difference. Result has 687 places, 3611 transitions, 95082 flow [2022-11-20 10:53:03,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=76222, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=95082, PETRI_PLACES=687, PETRI_TRANSITIONS=3611} [2022-11-20 10:53:03,536 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 613 predicate places. [2022-11-20 10:53:03,536 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 3611 transitions, 95082 flow [2022-11-20 10:53:03,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:03,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:03,536 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:03,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:03,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:03,737 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1814685321, now seen corresponding path program 17 times [2022-11-20 10:53:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:03,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618618822] [2022-11-20 10:53:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:03,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:03,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:03,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618618822] [2022-11-20 10:53:03,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618618822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:03,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791639508] [2022-11-20 10:53:03,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:53:03,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:03,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:03,903 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:03,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:53:03,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:53:03,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:03,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:53:03,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:04,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:04,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791639508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:04,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:04,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 27 [2022-11-20 10:53:04,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440528923] [2022-11-20 10:53:04,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:04,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 10:53:04,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 10:53:04,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:53:04,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:53:04,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 3611 transitions, 95082 flow. Second operand has 27 states, 27 states have (on average 53.592592592592595) internal successors, (1447), 27 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:04,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:04,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:53:04,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:20,987 INFO L130 PetriNetUnfolder]: 3266/8672 cut-off events. [2022-11-20 10:53:20,987 INFO L131 PetriNetUnfolder]: For 369914/369949 co-relation queries the response was YES. [2022-11-20 10:53:21,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97488 conditions, 8672 events. 3266/8672 cut-off events. For 369914/369949 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 86199 event pairs, 10 based on Foata normal form. 74/8744 useless extension candidates. Maximal degree in co-relation 97250. Up to 1563 conditions per place. [2022-11-20 10:53:21,283 INFO L137 encePairwiseOnDemand]: 64/84 looper letters, 205 selfloop transitions, 3539 changer transitions 364/4149 dead transitions. [2022-11-20 10:53:21,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 4149 transitions, 119426 flow [2022-11-20 10:53:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 10:53:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-20 10:53:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3830 transitions. [2022-11-20 10:53:21,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.642186452045607 [2022-11-20 10:53:21,289 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3830 transitions. [2022-11-20 10:53:21,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3830 transitions. [2022-11-20 10:53:21,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:21,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3830 transitions. [2022-11-20 10:53:21,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 53.943661971830984) internal successors, (3830), 71 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:21,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:21,304 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:21,305 INFO L175 Difference]: Start difference. First operand has 687 places, 3611 transitions, 95082 flow. Second operand 71 states and 3830 transitions. [2022-11-20 10:53:21,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 4149 transitions, 119426 flow [2022-11-20 10:53:28,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 4149 transitions, 116682 flow, removed 1029 selfloop flow, removed 18 redundant places. [2022-11-20 10:53:28,781 INFO L231 Difference]: Finished difference. Result has 753 places, 3754 transitions, 108291 flow [2022-11-20 10:53:28,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=92150, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3099, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=108291, PETRI_PLACES=753, PETRI_TRANSITIONS=3754} [2022-11-20 10:53:28,783 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 679 predicate places. [2022-11-20 10:53:28,784 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 3754 transitions, 108291 flow [2022-11-20 10:53:28,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.592592592592595) internal successors, (1447), 27 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:28,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:28,784 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:28,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:28,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:28,985 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:28,985 INFO L85 PathProgramCache]: Analyzing trace with hash 814750091, now seen corresponding path program 18 times [2022-11-20 10:53:28,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:28,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183613227] [2022-11-20 10:53:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:28,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:29,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:29,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183613227] [2022-11-20 10:53:29,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183613227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:29,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223869983] [2022-11-20 10:53:29,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:53:29,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:29,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:29,151 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:29,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:53:29,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:53:29,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:53:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223869983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:29,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:29,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-20 10:53:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192168214] [2022-11-20 10:53:29,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:29,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:53:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:53:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:53:29,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:53:29,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 3754 transitions, 108291 flow. Second operand has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:29,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:29,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:53:29,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:44,985 INFO L130 PetriNetUnfolder]: 3140/7583 cut-off events. [2022-11-20 10:53:44,985 INFO L131 PetriNetUnfolder]: For 359610/359645 co-relation queries the response was YES. [2022-11-20 10:53:45,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98078 conditions, 7583 events. 3140/7583 cut-off events. For 359610/359645 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69586 event pairs, 208 based on Foata normal form. 26/7521 useless extension candidates. Maximal degree in co-relation 97829. Up to 4341 conditions per place. [2022-11-20 10:53:45,298 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 2608 selfloop transitions, 1472 changer transitions 4/4125 dead transitions. [2022-11-20 10:53:45,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 4125 transitions, 127508 flow [2022-11-20 10:53:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:53:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 10:53:45,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1382 transitions. [2022-11-20 10:53:45,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6580952380952381 [2022-11-20 10:53:45,305 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1382 transitions. [2022-11-20 10:53:45,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1382 transitions. [2022-11-20 10:53:45,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:53:45,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1382 transitions. [2022-11-20 10:53:45,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.28) internal successors, (1382), 25 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:45,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:45,312 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:45,312 INFO L175 Difference]: Start difference. First operand has 753 places, 3754 transitions, 108291 flow. Second operand 25 states and 1382 transitions. [2022-11-20 10:53:45,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 4125 transitions, 127508 flow [2022-11-20 10:53:52,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 4125 transitions, 114144 flow, removed 2750 selfloop flow, removed 51 redundant places. [2022-11-20 10:53:53,024 INFO L231 Difference]: Finished difference. Result has 711 places, 3907 transitions, 106333 flow [2022-11-20 10:53:53,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=96103, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=106333, PETRI_PLACES=711, PETRI_TRANSITIONS=3907} [2022-11-20 10:53:53,027 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 637 predicate places. [2022-11-20 10:53:53,027 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 3907 transitions, 106333 flow [2022-11-20 10:53:53,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:53,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:53:53,028 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:53,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-20 10:53:53,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 10:53:53,228 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:53:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -789623059, now seen corresponding path program 19 times [2022-11-20 10:53:53,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:53,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109112247] [2022-11-20 10:53:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:53,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:53,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:53,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109112247] [2022-11-20 10:53:53,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109112247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:53:53,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772234352] [2022-11-20 10:53:53,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:53:53,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:53,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:53,387 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:53,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:53:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:53:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:53,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:53,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772234352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:53,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:53:53,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-11-20 10:53:53,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916309104] [2022-11-20 10:53:53,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:53,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:53:53,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:53,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:53:53,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:53:53,981 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:53:53,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 3907 transitions, 106333 flow. Second operand has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:53,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:53:53,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:53:53,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:54:08,419 INFO L130 PetriNetUnfolder]: 3306/8039 cut-off events. [2022-11-20 10:54:08,419 INFO L131 PetriNetUnfolder]: For 339182/339201 co-relation queries the response was YES. [2022-11-20 10:54:08,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96028 conditions, 8039 events. 3306/8039 cut-off events. For 339182/339201 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 74722 event pairs, 141 based on Foata normal form. 15/7979 useless extension candidates. Maximal degree in co-relation 95802. Up to 2786 conditions per place. [2022-11-20 10:54:08,687 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2397 selfloop transitions, 1771 changer transitions 5/4214 dead transitions. [2022-11-20 10:54:08,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 4214 transitions, 123959 flow [2022-11-20 10:54:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:54:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-20 10:54:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1553 transitions. [2022-11-20 10:54:08,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6602891156462585 [2022-11-20 10:54:08,690 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1553 transitions. [2022-11-20 10:54:08,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1553 transitions. [2022-11-20 10:54:08,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:54:08,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1553 transitions. [2022-11-20 10:54:08,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.464285714285715) internal successors, (1553), 28 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:08,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:08,698 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:08,698 INFO L175 Difference]: Start difference. First operand has 711 places, 3907 transitions, 106333 flow. Second operand 28 states and 1553 transitions. [2022-11-20 10:54:08,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 4214 transitions, 123959 flow [2022-11-20 10:54:15,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 4214 transitions, 122240 flow, removed 807 selfloop flow, removed 8 redundant places. [2022-11-20 10:54:15,208 INFO L231 Difference]: Finished difference. Result has 743 places, 4143 transitions, 119554 flow [2022-11-20 10:54:15,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=104810, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=119554, PETRI_PLACES=743, PETRI_TRANSITIONS=4143} [2022-11-20 10:54:15,211 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 669 predicate places. [2022-11-20 10:54:15,211 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 4143 transitions, 119554 flow [2022-11-20 10:54:15,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:54:15,211 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:15,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-20 10:54:15,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:15,412 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:54:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1480117485, now seen corresponding path program 20 times [2022-11-20 10:54:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:15,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018867553] [2022-11-20 10:54:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:15,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:15,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:15,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018867553] [2022-11-20 10:54:15,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018867553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616742878] [2022-11-20 10:54:15,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:15,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:15,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:15,563 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:15,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:54:15,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:15,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:15,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:54:15,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:15,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:16,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616742878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:16,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:16,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-20 10:54:16,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747523931] [2022-11-20 10:54:16,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:16,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:54:16,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:54:16,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:54:16,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:54:16,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 4143 transitions, 119554 flow. Second operand has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:16,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:54:16,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:54:16,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:54:29,691 INFO L130 PetriNetUnfolder]: 3314/7942 cut-off events. [2022-11-20 10:54:29,691 INFO L131 PetriNetUnfolder]: For 385610/385629 co-relation queries the response was YES. [2022-11-20 10:54:29,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100437 conditions, 7942 events. 3314/7942 cut-off events. For 385610/385629 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 72883 event pairs, 219 based on Foata normal form. 30/7878 useless extension candidates. Maximal degree in co-relation 100200. Up to 3548 conditions per place. [2022-11-20 10:54:29,868 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2570 selfloop transitions, 1645 changer transitions 2/4258 dead transitions. [2022-11-20 10:54:29,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 4258 transitions, 130862 flow [2022-11-20 10:54:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 10:54:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-20 10:54:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1809 transitions. [2022-11-20 10:54:29,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6525974025974026 [2022-11-20 10:54:29,871 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1809 transitions. [2022-11-20 10:54:29,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1809 transitions. [2022-11-20 10:54:29,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:54:29,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1809 transitions. [2022-11-20 10:54:29,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 54.81818181818182) internal successors, (1809), 33 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:29,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:29,876 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:29,877 INFO L175 Difference]: Start difference. First operand has 743 places, 4143 transitions, 119554 flow. Second operand 33 states and 1809 transitions. [2022-11-20 10:54:29,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 4258 transitions, 130862 flow [2022-11-20 10:54:36,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 759 places, 4258 transitions, 129612 flow, removed 579 selfloop flow, removed 14 redundant places. [2022-11-20 10:54:37,019 INFO L231 Difference]: Finished difference. Result has 762 places, 4195 transitions, 125049 flow [2022-11-20 10:54:37,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=117657, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=125049, PETRI_PLACES=762, PETRI_TRANSITIONS=4195} [2022-11-20 10:54:37,021 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 688 predicate places. [2022-11-20 10:54:37,021 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 4195 transitions, 125049 flow [2022-11-20 10:54:37,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:37,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:54:37,022 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:37,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:37,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 10:54:37,223 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:54:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:37,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1898688641, now seen corresponding path program 21 times [2022-11-20 10:54:37,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:37,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305126044] [2022-11-20 10:54:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:37,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:37,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:37,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305126044] [2022-11-20 10:54:37,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305126044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:37,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318456893] [2022-11-20 10:54:37,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:37,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:37,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:37,361 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:37,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:54:37,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:54:37,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:37,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:54:37,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:37,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:37,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318456893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:37,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:37,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-20 10:54:37,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213327006] [2022-11-20 10:54:37,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:37,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:54:37,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:54:37,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:54:37,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:54:37,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 4195 transitions, 125049 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:37,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:54:37,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:54:37,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:54:53,429 INFO L130 PetriNetUnfolder]: 3523/8421 cut-off events. [2022-11-20 10:54:53,429 INFO L131 PetriNetUnfolder]: For 454402/454437 co-relation queries the response was YES. [2022-11-20 10:54:53,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110901 conditions, 8421 events. 3523/8421 cut-off events. For 454402/454437 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 77802 event pairs, 223 based on Foata normal form. 44/8370 useless extension candidates. Maximal degree in co-relation 110665. Up to 3858 conditions per place. [2022-11-20 10:54:53,619 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2934 selfloop transitions, 1657 changer transitions 7/4639 dead transitions. [2022-11-20 10:54:53,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 4639 transitions, 149214 flow [2022-11-20 10:54:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 10:54:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-20 10:54:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2727 transitions. [2022-11-20 10:54:53,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6492857142857142 [2022-11-20 10:54:53,623 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2727 transitions. [2022-11-20 10:54:53,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2727 transitions. [2022-11-20 10:54:53,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:54:53,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2727 transitions. [2022-11-20 10:54:53,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 54.54) internal successors, (2727), 50 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:53,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:53,632 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:53,632 INFO L175 Difference]: Start difference. First operand has 762 places, 4195 transitions, 125049 flow. Second operand 50 states and 2727 transitions. [2022-11-20 10:54:53,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 4639 transitions, 149214 flow [2022-11-20 10:55:01,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 4639 transitions, 147844 flow, removed 164 selfloop flow, removed 20 redundant places. [2022-11-20 10:55:02,002 INFO L231 Difference]: Finished difference. Result has 810 places, 4482 transitions, 140290 flow [2022-11-20 10:55:02,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=123349, PETRI_DIFFERENCE_MINUEND_PLACES=740, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=140290, PETRI_PLACES=810, PETRI_TRANSITIONS=4482} [2022-11-20 10:55:02,005 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 736 predicate places. [2022-11-20 10:55:02,005 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 4482 transitions, 140290 flow [2022-11-20 10:55:02,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:02,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:02,006 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:02,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:02,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 10:55:02,211 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:55:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1315811141, now seen corresponding path program 22 times [2022-11-20 10:55:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656301963] [2022-11-20 10:55:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:02,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:02,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:02,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656301963] [2022-11-20 10:55:02,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656301963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:02,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191725552] [2022-11-20 10:55:02,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:55:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:02,371 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:02,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:55:02,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:55:02,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:02,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:55:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:02,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:02,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191725552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:02,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:02,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-20 10:55:02,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442962183] [2022-11-20 10:55:02,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:02,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:55:02,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:02,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:55:02,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:55:02,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:55:02,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 4482 transitions, 140290 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:02,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:02,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:55:02,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:23,316 INFO L130 PetriNetUnfolder]: 3641/8778 cut-off events. [2022-11-20 10:55:23,316 INFO L131 PetriNetUnfolder]: For 523832/523851 co-relation queries the response was YES. [2022-11-20 10:55:23,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119290 conditions, 8778 events. 3641/8778 cut-off events. For 523832/523851 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 82154 event pairs, 21 based on Foata normal form. 10/8770 useless extension candidates. Maximal degree in co-relation 119033. Up to 3084 conditions per place. [2022-11-20 10:55:23,871 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 2915 selfloop transitions, 1751 changer transitions 1/4708 dead transitions. [2022-11-20 10:55:23,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 4708 transitions, 157184 flow [2022-11-20 10:55:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 10:55:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-20 10:55:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2256 transitions. [2022-11-20 10:55:23,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2022-11-20 10:55:23,875 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2256 transitions. [2022-11-20 10:55:23,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2256 transitions. [2022-11-20 10:55:23,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:23,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2256 transitions. [2022-11-20 10:55:23,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 55.02439024390244) internal successors, (2256), 41 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:23,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:23,883 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:23,883 INFO L175 Difference]: Start difference. First operand has 810 places, 4482 transitions, 140290 flow. Second operand 41 states and 2256 transitions. [2022-11-20 10:55:23,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 4708 transitions, 157184 flow [2022-11-20 10:55:34,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 837 places, 4708 transitions, 154509 flow, removed 1261 selfloop flow, removed 12 redundant places. [2022-11-20 10:55:34,878 INFO L231 Difference]: Finished difference. Result has 851 places, 4645 transitions, 150498 flow [2022-11-20 10:55:34,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=137633, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=150498, PETRI_PLACES=851, PETRI_TRANSITIONS=4645} [2022-11-20 10:55:34,886 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 777 predicate places. [2022-11-20 10:55:34,886 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 4645 transitions, 150498 flow [2022-11-20 10:55:34,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:34,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:55:34,887 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:34,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:35,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 10:55:35,092 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:55:35,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash -828364127, now seen corresponding path program 23 times [2022-11-20 10:55:35,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:35,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383142216] [2022-11-20 10:55:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:35,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:35,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383142216] [2022-11-20 10:55:35,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383142216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:35,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329441228] [2022-11-20 10:55:35,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:55:35,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:35,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:35,228 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:35,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:55:35,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:55:35,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:55:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:35,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:35,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329441228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:35,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:35,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-20 10:55:35,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843779220] [2022-11-20 10:55:35,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:35,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:55:35,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:35,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:55:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:55:35,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:55:35,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 4645 transitions, 150498 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:35,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:35,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:55:35,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:55:56,850 INFO L130 PetriNetUnfolder]: 4112/10022 cut-off events. [2022-11-20 10:55:56,850 INFO L131 PetriNetUnfolder]: For 674972/674991 co-relation queries the response was YES. [2022-11-20 10:55:57,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140841 conditions, 10022 events. 4112/10022 cut-off events. For 674972/674991 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 97179 event pairs, 35 based on Foata normal form. 15/10015 useless extension candidates. Maximal degree in co-relation 140573. Up to 2588 conditions per place. [2022-11-20 10:55:57,142 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 2649 selfloop transitions, 2748 changer transitions 4/5442 dead transitions. [2022-11-20 10:55:57,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 5442 transitions, 188811 flow [2022-11-20 10:55:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:55:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-20 10:55:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2067 transitions. [2022-11-20 10:55:57,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.665057915057915 [2022-11-20 10:55:57,145 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2067 transitions. [2022-11-20 10:55:57,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2067 transitions. [2022-11-20 10:55:57,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:55:57,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2067 transitions. [2022-11-20 10:55:57,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.86486486486486) internal successors, (2067), 37 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:57,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:57,152 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 84.0) internal successors, (3192), 38 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:57,152 INFO L175 Difference]: Start difference. First operand has 851 places, 4645 transitions, 150498 flow. Second operand 37 states and 2067 transitions. [2022-11-20 10:55:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 5442 transitions, 188811 flow [2022-11-20 10:56:09,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 878 places, 5442 transitions, 186273 flow, removed 1203 selfloop flow, removed 9 redundant places. [2022-11-20 10:56:09,864 INFO L231 Difference]: Finished difference. Result has 895 places, 5212 transitions, 180814 flow [2022-11-20 10:56:09,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148902, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=180814, PETRI_PLACES=895, PETRI_TRANSITIONS=5212} [2022-11-20 10:56:09,868 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 821 predicate places. [2022-11-20 10:56:09,868 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 5212 transitions, 180814 flow [2022-11-20 10:56:09,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:09,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:09,869 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:09,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:10,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 10:56:10,075 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:56:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:10,075 INFO L85 PathProgramCache]: Analyzing trace with hash -590052515, now seen corresponding path program 24 times [2022-11-20 10:56:10,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:10,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545731539] [2022-11-20 10:56:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:10,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:10,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545731539] [2022-11-20 10:56:10,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545731539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524933932] [2022-11-20 10:56:10,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:56:10,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:10,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:10,231 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:10,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 10:56:10,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:56:10,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:10,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:56:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:10,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:10,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524933932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:10,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:10,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-20 10:56:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495165047] [2022-11-20 10:56:10,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:10,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:56:10,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:56:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:56:10,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:56:10,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 5212 transitions, 180814 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:10,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:10,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:56:10,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:56:37,582 INFO L130 PetriNetUnfolder]: 4394/10621 cut-off events. [2022-11-20 10:56:37,582 INFO L131 PetriNetUnfolder]: For 805685/805720 co-relation queries the response was YES. [2022-11-20 10:56:37,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158472 conditions, 10621 events. 4394/10621 cut-off events. For 805685/805720 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 103229 event pairs, 296 based on Foata normal form. 27/10530 useless extension candidates. Maximal degree in co-relation 158188. Up to 4865 conditions per place. [2022-11-20 10:56:37,955 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 3584 selfloop transitions, 2100 changer transitions 2/5727 dead transitions. [2022-11-20 10:56:37,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 943 places, 5727 transitions, 210245 flow [2022-11-20 10:56:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 10:56:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-20 10:56:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2705 transitions. [2022-11-20 10:56:37,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6571914480077745 [2022-11-20 10:56:37,961 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2705 transitions. [2022-11-20 10:56:37,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2705 transitions. [2022-11-20 10:56:37,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:56:37,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2705 transitions. [2022-11-20 10:56:37,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.204081632653065) internal successors, (2705), 49 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:37,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:37,967 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:37,967 INFO L175 Difference]: Start difference. First operand has 895 places, 5212 transitions, 180814 flow. Second operand 49 states and 2705 transitions. [2022-11-20 10:56:37,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 943 places, 5727 transitions, 210245 flow [2022-11-20 10:56:53,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 934 places, 5727 transitions, 206676 flow, removed 928 selfloop flow, removed 9 redundant places. [2022-11-20 10:56:53,423 INFO L231 Difference]: Finished difference. Result has 958 places, 5583 transitions, 198410 flow [2022-11-20 10:56:53,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=177485, PETRI_DIFFERENCE_MINUEND_PLACES=886, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1775, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=198410, PETRI_PLACES=958, PETRI_TRANSITIONS=5583} [2022-11-20 10:56:53,426 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 884 predicate places. [2022-11-20 10:56:53,426 INFO L495 AbstractCegarLoop]: Abstraction has has 958 places, 5583 transitions, 198410 flow [2022-11-20 10:56:53,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:53,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:56:53,427 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:53,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:53,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:53,627 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:56:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash 50219123, now seen corresponding path program 25 times [2022-11-20 10:56:53,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:53,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148893578] [2022-11-20 10:56:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:53,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:53,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148893578] [2022-11-20 10:56:53,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148893578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:56:53,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832425222] [2022-11-20 10:56:53,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:56:53,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:56:53,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:56:53,772 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:56:53,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ec56ac0-3bb7-4ac9-be57-e96b4c09219b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 10:56:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:56:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:54,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832425222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:54,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:56:54,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-11-20 10:56:54,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377369318] [2022-11-20 10:56:54,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:54,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:56:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:54,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:56:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:56:54,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-20 10:56:54,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 958 places, 5583 transitions, 198410 flow. Second operand has 25 states, 25 states have (on average 53.32) internal successors, (1333), 25 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:54,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:56:54,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-20 10:56:54,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:57:27,286 INFO L130 PetriNetUnfolder]: 4915/12239 cut-off events. [2022-11-20 10:57:27,287 INFO L131 PetriNetUnfolder]: For 938101/938120 co-relation queries the response was YES. [2022-11-20 10:57:27,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179940 conditions, 12239 events. 4915/12239 cut-off events. For 938101/938120 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 124241 event pairs, 50 based on Foata normal form. 15/12230 useless extension candidates. Maximal degree in co-relation 179634. Up to 3421 conditions per place. [2022-11-20 10:57:28,099 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 3189 selfloop transitions, 3141 changer transitions 3/6374 dead transitions. [2022-11-20 10:57:28,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 6374 transitions, 238710 flow [2022-11-20 10:57:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:57:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 10:57:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2153 transitions. [2022-11-20 10:57:28,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6572039072039072 [2022-11-20 10:57:28,103 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2153 transitions. [2022-11-20 10:57:28,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2153 transitions. [2022-11-20 10:57:28,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:57:28,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2153 transitions. [2022-11-20 10:57:28,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.205128205128204) internal successors, (2153), 39 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:28,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:28,108 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:28,109 INFO L175 Difference]: Start difference. First operand has 958 places, 5583 transitions, 198410 flow. Second operand 39 states and 2153 transitions. [2022-11-20 10:57:28,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 6374 transitions, 238710 flow