./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8 --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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- 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-2329fc7 [2022-12-13 14:37:35,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:37:35,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:37:35,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:37:35,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:37:35,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:37:35,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:37:35,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:37:35,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:37:35,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:37:35,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:37:35,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:37:35,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:37:35,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:37:35,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:37:35,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:37:35,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:37:35,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:37:35,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:37:35,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:37:35,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:37:35,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:37:35,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:37:35,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:37:35,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:37:35,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:37:35,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:37:35,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:37:35,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:37:35,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:37:35,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:37:35,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:37:35,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:37:35,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:37:35,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:37:35,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:37:35,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:37:35,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:37:35,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:37:35,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:37:35,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:37:35,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:37:35,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:37:35,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:37:35,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:37:35,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:37:35,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:37:35,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:37:35,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:37:35,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:37:35,739 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:37:35,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:37:35,739 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:37:35,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:37:35,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:37:35,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:37:35,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:37:35,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:37:35,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:37:35,740 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:37:35,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:37:35,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:37:35,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:37:35,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:37:35,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:37:35,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:37:35,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:37:35,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:37:35,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:37:35,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:37:35,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:37:35,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:37:35,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:37:35,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:37:35,743 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:37:35,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:37:35,744 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:37:35,744 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-12-13 14:37:35,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:37:35,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:37:35,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:37:35,967 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:37:35,967 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:37:35,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-12-13 14:37:38,569 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:37:38,719 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:37:38,719 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-12-13 14:37:38,726 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/data/77cc2aea8/7f52b4f89bad48a9b1af94ecc8e37808/FLAGd1f25a5c4 [2022-12-13 14:37:38,738 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/data/77cc2aea8/7f52b4f89bad48a9b1af94ecc8e37808 [2022-12-13 14:37:38,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:37:38,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:37:38,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:37:38,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:37:38,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:37:38,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:38,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6982d3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38, skipping insertion in model container [2022-12-13 14:37:38,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:38,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:37:38,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:37:38,925 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_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-12-13 14:37:38,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:37:38,944 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:37:38,972 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_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-12-13 14:37:38,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:37:38,990 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:37:38,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38 WrapperNode [2022-12-13 14:37:38,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:37:38,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:37:38,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:37:38,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:37:38,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,032 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 297 [2022-12-13 14:37:39,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:37:39,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:37:39,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:37:39,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:37:39,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,061 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:37:39,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:37:39,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:37:39,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:37:39,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (1/1) ... [2022-12-13 14:37:39,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:37:39,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:39,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:37:39,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:37:39,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:37:39,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:37:39,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:37:39,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:37:39,136 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:37:39,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:37:39,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:37:39,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:37:39,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 14:37:39,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 14:37:39,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:37:39,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:37:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:37:39,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:37:39,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:37:39,139 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:37:39,239 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:37:39,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:37:39,585 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:37:39,601 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:37:39,601 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 14:37:39,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:37:39 BoogieIcfgContainer [2022-12-13 14:37:39,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:37:39,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:37:39,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:37:39,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:37:39,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:37:38" (1/3) ... [2022-12-13 14:37:39,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6bbdfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:37:39, skipping insertion in model container [2022-12-13 14:37:39,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:38" (2/3) ... [2022-12-13 14:37:39,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6bbdfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:37:39, skipping insertion in model container [2022-12-13 14:37:39,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:37:39" (3/3) ... [2022-12-13 14:37:39,611 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2022-12-13 14:37:39,617 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:37:39,625 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:37:39,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:37:39,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:37:39,715 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 14:37:39,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 359 places, 375 transitions, 774 flow [2022-12-13 14:37:39,891 INFO L130 PetriNetUnfolder]: 26/372 cut-off events. [2022-12-13 14:37:39,891 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 14:37:39,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 372 events. 26/372 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 876 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2022-12-13 14:37:39,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 359 places, 375 transitions, 774 flow [2022-12-13 14:37:39,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 361 transitions, 740 flow [2022-12-13 14:37:39,909 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:37:39,917 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 361 transitions, 740 flow [2022-12-13 14:37:39,919 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 361 transitions, 740 flow [2022-12-13 14:37:39,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 361 transitions, 740 flow [2022-12-13 14:37:39,987 INFO L130 PetriNetUnfolder]: 26/361 cut-off events. [2022-12-13 14:37:39,988 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 14:37:39,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 361 events. 26/361 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 879 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2022-12-13 14:37:40,005 INFO L119 LiptonReduction]: Number of co-enabled transitions 34440 [2022-12-13 14:37:48,693 INFO L134 LiptonReduction]: Checked pairs total: 30268 [2022-12-13 14:37:48,693 INFO L136 LiptonReduction]: Total number of compositions: 421 [2022-12-13 14:37:48,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:37:48,708 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;@34c266b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:37:48,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 14:37:48,717 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-12-13 14:37:48,718 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 14:37:48,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:37:48,718 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] [2022-12-13 14:37:48,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:37:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash -804045070, now seen corresponding path program 1 times [2022-12-13 14:37:48,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:48,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359296645] [2022-12-13 14:37:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:49,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359296645] [2022-12-13 14:37:49,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359296645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:37:49,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:37:49,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:37:49,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175449015] [2022-12-13 14:37:49,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:37:49,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:37:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:37:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:37:49,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 796 [2022-12-13 14:37:49,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:37:49,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 796 [2022-12-13 14:37:49,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:37:49,145 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2022-12-13 14:37:49,145 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-12-13 14:37:49,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 770 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2022-12-13 14:37:49,147 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-12-13 14:37:49,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2022-12-13 14:37:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:37:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:37:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1061 transitions. [2022-12-13 14:37:49,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44430485762144056 [2022-12-13 14:37:49,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1061 transitions. [2022-12-13 14:37:49,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1061 transitions. [2022-12-13 14:37:49,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:37:49,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1061 transitions. [2022-12-13 14:37:49,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,178 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1061 transitions. [2022-12-13 14:37:49,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2022-12-13 14:37:49,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 14:37:49,182 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2022-12-13 14:37:49,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2022-12-13 14:37:49,186 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-12-13 14:37:49,187 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2022-12-13 14:37:49,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:37:49,187 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] [2022-12-13 14:37:49,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:37:49,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:37:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1304076405, now seen corresponding path program 1 times [2022-12-13 14:37:49,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:49,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121863739] [2022-12-13 14:37:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:49,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:49,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121863739] [2022-12-13 14:37:49,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121863739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053410489] [2022-12-13 14:37:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:49,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:49,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:49,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:49,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:37:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 14:37:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:49,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:37:49,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053410489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:49,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:37:49,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:37:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788926110] [2022-12-13 14:37:49,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:49,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:37:49,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:37:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:37:49,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 796 [2022-12-13 14:37:49,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 346.85714285714283) internal successors, (2428), 7 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:37:49,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 796 [2022-12-13 14:37:49,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:37:49,657 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2022-12-13 14:37:49,657 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 14:37:49,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 774 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2022-12-13 14:37:49,660 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2022-12-13 14:37:49,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2022-12-13 14:37:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:37:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:37:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1744 transitions. [2022-12-13 14:37:49,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4381909547738693 [2022-12-13 14:37:49,666 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1744 transitions. [2022-12-13 14:37:49,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1744 transitions. [2022-12-13 14:37:49,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:37:49,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1744 transitions. [2022-12-13 14:37:49,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 348.8) internal successors, (1744), 5 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 796.0) internal successors, (4776), 6 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,674 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 796.0) internal successors, (4776), 6 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,674 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1744 transitions. [2022-12-13 14:37:49,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2022-12-13 14:37:49,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:37:49,675 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2022-12-13 14:37:49,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-12-13 14:37:49,676 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2022-12-13 14:37:49,676 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2022-12-13 14:37:49,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 346.85714285714283) internal successors, (2428), 7 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:49,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:37:49,677 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:49,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:37:49,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:49,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:37:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash 909563435, now seen corresponding path program 2 times [2022-12-13 14:37:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:49,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006144818] [2022-12-13 14:37:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:37:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:50,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006144818] [2022-12-13 14:37:50,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006144818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:37:50,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:37:50,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:37:50,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722682631] [2022-12-13 14:37:50,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:37:50,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:37:50,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:37:50,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:37:50,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 796 [2022-12-13 14:37:50,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 337.25) internal successors, (1349), 4 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:50,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:37:50,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 796 [2022-12-13 14:37:50,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:37:50,503 INFO L130 PetriNetUnfolder]: 381/567 cut-off events. [2022-12-13 14:37:50,503 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 14:37:50,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1721 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2022-12-13 14:37:50,504 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2022-12-13 14:37:50,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2022-12-13 14:37:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:37:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:37:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1382 transitions. [2022-12-13 14:37:50,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43404522613065327 [2022-12-13 14:37:50,507 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1382 transitions. [2022-12-13 14:37:50,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1382 transitions. [2022-12-13 14:37:50,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:37:50,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1382 transitions. [2022-12-13 14:37:50,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.5) internal successors, (1382), 4 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) [2022-12-13 14:37:50,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:50,514 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:50,514 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1382 transitions. [2022-12-13 14:37:50,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2022-12-13 14:37:50,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 14:37:50,516 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2022-12-13 14:37:50,516 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2022-12-13 14:37:50,517 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2022-12-13 14:37:50,517 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2022-12-13 14:37:50,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.25) internal successors, (1349), 4 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:50,518 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:37:50,518 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:50,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:37:50,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:37:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:50,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1856498669, now seen corresponding path program 1 times [2022-12-13 14:37:50,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:50,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775177763] [2022-12-13 14:37:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:50,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 14:37:50,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775177763] [2022-12-13 14:37:50,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775177763] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:37:50,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:37:50,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:37:50,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617102113] [2022-12-13 14:37:50,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:37:50,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:37:50,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:50,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:37:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:37:50,893 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 796 [2022-12-13 14:37:50,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 327.4) internal successors, (1637), 5 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:50,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:37:50,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 796 [2022-12-13 14:37:50,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:37:51,108 INFO L130 PetriNetUnfolder]: 462/680 cut-off events. [2022-12-13 14:37:51,108 INFO L131 PetriNetUnfolder]: For 220/220 co-relation queries the response was YES. [2022-12-13 14:37:51,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2141 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2022-12-13 14:37:51,110 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2022-12-13 14:37:51,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2022-12-13 14:37:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:37:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:37:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1344 transitions. [2022-12-13 14:37:51,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4221105527638191 [2022-12-13 14:37:51,117 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1344 transitions. [2022-12-13 14:37:51,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1344 transitions. [2022-12-13 14:37:51,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:37:51,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1344 transitions. [2022-12-13 14:37:51,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 336.0) internal successors, (1344), 4 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) [2022-12-13 14:37:51,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:51,136 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:51,137 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1344 transitions. [2022-12-13 14:37:51,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2022-12-13 14:37:51,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 14:37:51,139 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2022-12-13 14:37:51,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2022-12-13 14:37:51,140 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2022-12-13 14:37:51,141 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2022-12-13 14:37:51,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 327.4) internal successors, (1637), 5 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:37:51,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:37:51,143 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:51,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:37:51,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:37:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:51,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2024238401, now seen corresponding path program 1 times [2022-12-13 14:37:51,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:51,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098353000] [2022-12-13 14:37:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:51,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:37:52,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:52,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098353000] [2022-12-13 14:37:52,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098353000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:52,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643635557] [2022-12-13 14:37:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:52,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:52,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:52,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:52,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:37:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 14:37:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:37:52,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-12-13 14:37:52,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 126 [2022-12-13 14:37:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:37:53,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:54,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:37:54,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 67 [2022-12-13 14:37:54,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-13 14:37:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:37:54,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643635557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:54,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:37:54,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2022-12-13 14:37:54,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446140563] [2022-12-13 14:37:54,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 14:37:54,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 14:37:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=938, Unknown=3, NotChecked=0, Total=1056 [2022-12-13 14:37:57,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:38:00,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 796 [2022-12-13 14:38:00,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 33 states, 33 states have (on average 282.09090909090907) internal successors, (9309), 33 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:00,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:38:00,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 796 [2022-12-13 14:38:00,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:38:07,605 INFO L130 PetriNetUnfolder]: 1228/1814 cut-off events. [2022-12-13 14:38:07,605 INFO L131 PetriNetUnfolder]: For 591/591 co-relation queries the response was YES. [2022-12-13 14:38:07,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 1814 events. 1228/1814 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7380 event pairs, 51 based on Foata normal form. 5/1333 useless extension candidates. Maximal degree in co-relation 4716. Up to 439 conditions per place. [2022-12-13 14:38:07,611 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 200 selfloop transitions, 101 changer transitions 49/350 dead transitions. [2022-12-13 14:38:07,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 350 transitions, 1711 flow [2022-12-13 14:38:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 14:38:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-13 14:38:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 12386 transitions. [2022-12-13 14:38:07,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3618674769194811 [2022-12-13 14:38:07,640 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 12386 transitions. [2022-12-13 14:38:07,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 12386 transitions. [2022-12-13 14:38:07,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:38:07,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 12386 transitions. [2022-12-13 14:38:07,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 288.04651162790697) internal successors, (12386), 43 states have internal predecessors, (12386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:07,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 796.0) internal successors, (35024), 44 states have internal predecessors, (35024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:07,704 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 796.0) internal successors, (35024), 44 states have internal predecessors, (35024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:07,704 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 43 states and 12386 transitions. [2022-12-13 14:38:07,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 350 transitions, 1711 flow [2022-12-13 14:38:07,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 350 transitions, 1632 flow, removed 26 selfloop flow, removed 2 redundant places. [2022-12-13 14:38:07,708 INFO L231 Difference]: Finished difference. Result has 103 places, 132 transitions, 831 flow [2022-12-13 14:38:07,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=831, PETRI_PLACES=103, PETRI_TRANSITIONS=132} [2022-12-13 14:38:07,709 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2022-12-13 14:38:07,709 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 132 transitions, 831 flow [2022-12-13 14:38:07,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 282.09090909090907) internal successors, (9309), 33 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:07,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:38:07,711 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:38:07,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:38:07,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:38:07,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:38:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:38:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash 717960989, now seen corresponding path program 2 times [2022-12-13 14:38:07,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:38:07,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376279455] [2022-12-13 14:38:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:38:07,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:38:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:38:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:08,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:38:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376279455] [2022-12-13 14:38:08,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376279455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:38:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985332831] [2022-12-13 14:38:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:38:08,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:38:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:38:08,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:38:08,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:38:08,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:38:08,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:38:08,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 14:38:08,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:38:09,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 100 [2022-12-13 14:38:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:09,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:38:10,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:38:10,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 99 [2022-12-13 14:38:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:10,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985332831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:38:10,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:38:10,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 25 [2022-12-13 14:38:10,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283909847] [2022-12-13 14:38:10,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:38:10,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:38:10,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:38:10,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:38:10,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:38:13,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 796 [2022-12-13 14:38:13,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 132 transitions, 831 flow. Second operand has 26 states, 26 states have (on average 287.34615384615387) internal successors, (7471), 26 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:13,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:38:13,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 796 [2022-12-13 14:38:13,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:38:25,675 INFO L130 PetriNetUnfolder]: 4142/6551 cut-off events. [2022-12-13 14:38:25,675 INFO L131 PetriNetUnfolder]: For 96184/96184 co-relation queries the response was YES. [2022-12-13 14:38:25,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38169 conditions, 6551 events. 4142/6551 cut-off events. For 96184/96184 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38813 event pairs, 189 based on Foata normal form. 16/6383 useless extension candidates. Maximal degree in co-relation 38117. Up to 1583 conditions per place. [2022-12-13 14:38:25,754 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 347 selfloop transitions, 345 changer transitions 145/837 dead transitions. [2022-12-13 14:38:25,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 837 transitions, 7693 flow [2022-12-13 14:38:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 14:38:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 14:38:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 19942 transitions. [2022-12-13 14:38:25,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36842299733963935 [2022-12-13 14:38:25,813 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 19942 transitions. [2022-12-13 14:38:25,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 19942 transitions. [2022-12-13 14:38:25,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:38:25,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 19942 transitions. [2022-12-13 14:38:25,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 293.2647058823529) internal successors, (19942), 68 states have internal predecessors, (19942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:25,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 796.0) internal successors, (54924), 69 states have internal predecessors, (54924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:25,901 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 796.0) internal successors, (54924), 69 states have internal predecessors, (54924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:25,901 INFO L175 Difference]: Start difference. First operand has 103 places, 132 transitions, 831 flow. Second operand 68 states and 19942 transitions. [2022-12-13 14:38:25,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 837 transitions, 7693 flow [2022-12-13 14:38:26,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 837 transitions, 6558 flow, removed 513 selfloop flow, removed 8 redundant places. [2022-12-13 14:38:26,145 INFO L231 Difference]: Finished difference. Result has 205 places, 447 transitions, 4644 flow [2022-12-13 14:38:26,145 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=4644, PETRI_PLACES=205, PETRI_TRANSITIONS=447} [2022-12-13 14:38:26,146 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2022-12-13 14:38:26,146 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 447 transitions, 4644 flow [2022-12-13 14:38:26,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 287.34615384615387) internal successors, (7471), 26 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:26,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:38:26,147 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:38:26,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:38:26,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 14:38:26,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:38:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:38:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash 282293633, now seen corresponding path program 3 times [2022-12-13 14:38:26,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:38:26,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435874312] [2022-12-13 14:38:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:38:26,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:38:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:38:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:38:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435874312] [2022-12-13 14:38:27,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435874312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:38:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525064042] [2022-12-13 14:38:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:38:27,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:38:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:38:27,136 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:38:27,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:38:27,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:38:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:38:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 14:38:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:38:27,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 97 [2022-12-13 14:38:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:28,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:38:28,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:38:28,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 109 [2022-12-13 14:38:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:29,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525064042] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:38:29,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:38:29,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2022-12-13 14:38:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838236127] [2022-12-13 14:38:29,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:38:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 14:38:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:38:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 14:38:29,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:38:31,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 796 [2022-12-13 14:38:31,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 447 transitions, 4644 flow. Second operand has 27 states, 27 states have (on average 288.22222222222223) internal successors, (7782), 27 states have internal predecessors, (7782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:31,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:38:31,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 796 [2022-12-13 14:38:31,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:38:39,313 INFO L130 PetriNetUnfolder]: 5910/9441 cut-off events. [2022-12-13 14:38:39,313 INFO L131 PetriNetUnfolder]: For 180723/180723 co-relation queries the response was YES. [2022-12-13 14:38:39,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64132 conditions, 9441 events. 5910/9441 cut-off events. For 180723/180723 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 59927 event pairs, 742 based on Foata normal form. 31/9472 useless extension candidates. Maximal degree in co-relation 64037. Up to 2996 conditions per place. [2022-12-13 14:38:39,381 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 645 selfloop transitions, 303 changer transitions 126/1074 dead transitions. [2022-12-13 14:38:39,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 1074 transitions, 14278 flow [2022-12-13 14:38:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 14:38:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 14:38:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 11519 transitions. [2022-12-13 14:38:39,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37105398788815874 [2022-12-13 14:38:39,402 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 11519 transitions. [2022-12-13 14:38:39,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 11519 transitions. [2022-12-13 14:38:39,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:38:39,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 11519 transitions. [2022-12-13 14:38:39,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 295.35897435897436) internal successors, (11519), 39 states have internal predecessors, (11519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:39,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 796.0) internal successors, (31840), 40 states have internal predecessors, (31840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:39,429 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 796.0) internal successors, (31840), 40 states have internal predecessors, (31840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:39,429 INFO L175 Difference]: Start difference. First operand has 205 places, 447 transitions, 4644 flow. Second operand 39 states and 11519 transitions. [2022-12-13 14:38:39,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 1074 transitions, 14278 flow [2022-12-13 14:38:42,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 1074 transitions, 9166 flow, removed 2528 selfloop flow, removed 20 redundant places. [2022-12-13 14:38:42,683 INFO L231 Difference]: Finished difference. Result has 235 places, 606 transitions, 5347 flow [2022-12-13 14:38:42,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5347, PETRI_PLACES=235, PETRI_TRANSITIONS=606} [2022-12-13 14:38:42,685 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2022-12-13 14:38:42,685 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 606 transitions, 5347 flow [2022-12-13 14:38:42,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 288.22222222222223) internal successors, (7782), 27 states have internal predecessors, (7782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:42,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:38:42,686 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:38:42,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:38:42,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:38:42,888 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:38:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:38:42,889 INFO L85 PathProgramCache]: Analyzing trace with hash -248220477, now seen corresponding path program 4 times [2022-12-13 14:38:42,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:38:42,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800587459] [2022-12-13 14:38:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:38:42,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:38:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:38:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:43,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:38:43,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800587459] [2022-12-13 14:38:43,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800587459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:38:43,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471914852] [2022-12-13 14:38:43,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:38:43,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:38:43,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:38:43,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:38:43,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:38:43,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:38:43,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:38:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 14:38:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:38:43,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 139 [2022-12-13 14:38:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:44,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:38:44,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:38:44,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 111 [2022-12-13 14:38:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:44,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471914852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:38:44,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:38:44,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-12-13 14:38:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505688167] [2022-12-13 14:38:44,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:38:44,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 14:38:44,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:38:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 14:38:44,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:38:46,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 301 out of 796 [2022-12-13 14:38:46,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 606 transitions, 5347 flow. Second operand has 20 states, 20 states have (on average 303.9) internal successors, (6078), 20 states have internal predecessors, (6078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:46,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:38:46,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 301 of 796 [2022-12-13 14:38:46,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:38:51,769 INFO L130 PetriNetUnfolder]: 7082/11360 cut-off events. [2022-12-13 14:38:51,770 INFO L131 PetriNetUnfolder]: For 136022/136022 co-relation queries the response was YES. [2022-12-13 14:38:51,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62267 conditions, 11360 events. 7082/11360 cut-off events. For 136022/136022 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 75087 event pairs, 894 based on Foata normal form. 34/11126 useless extension candidates. Maximal degree in co-relation 62159. Up to 2808 conditions per place. [2022-12-13 14:38:51,866 INFO L137 encePairwiseOnDemand]: 786/796 looper letters, 747 selfloop transitions, 344 changer transitions 125/1216 dead transitions. [2022-12-13 14:38:51,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1216 transitions, 13531 flow [2022-12-13 14:38:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:38:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 14:38:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 9015 transitions. [2022-12-13 14:38:51,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3905302373938659 [2022-12-13 14:38:51,878 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 9015 transitions. [2022-12-13 14:38:51,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 9015 transitions. [2022-12-13 14:38:51,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:38:51,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 9015 transitions. [2022-12-13 14:38:51,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 310.86206896551727) internal successors, (9015), 29 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:51,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 796.0) internal successors, (23880), 30 states have internal predecessors, (23880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:51,917 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 796.0) internal successors, (23880), 30 states have internal predecessors, (23880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:51,917 INFO L175 Difference]: Start difference. First operand has 235 places, 606 transitions, 5347 flow. Second operand 29 states and 9015 transitions. [2022-12-13 14:38:51,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1216 transitions, 13531 flow [2022-12-13 14:38:53,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1216 transitions, 12704 flow, removed 413 selfloop flow, removed 12 redundant places. [2022-12-13 14:38:53,702 INFO L231 Difference]: Finished difference. Result has 254 places, 670 transitions, 6749 flow [2022-12-13 14:38:53,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=5036, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6749, PETRI_PLACES=254, PETRI_TRANSITIONS=670} [2022-12-13 14:38:53,703 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2022-12-13 14:38:53,703 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 670 transitions, 6749 flow [2022-12-13 14:38:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 303.9) internal successors, (6078), 20 states have internal predecessors, (6078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:53,704 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:38:53,704 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:38:53,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:38:53,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 14:38:53,906 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:38:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:38:53,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1767420539, now seen corresponding path program 5 times [2022-12-13 14:38:53,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:38:53,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095691129] [2022-12-13 14:38:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:38:53,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:38:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:38:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:54,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:38:54,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095691129] [2022-12-13 14:38:54,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095691129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:38:54,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051327342] [2022-12-13 14:38:54,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:38:54,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:38:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:38:54,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:38:54,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:38:54,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 14:38:54,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:38:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 14:38:54,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:38:54,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 163 [2022-12-13 14:38:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:55,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:38:56,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:38:56,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 87 [2022-12-13 14:38:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:38:56,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051327342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:38:56,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:38:56,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-12-13 14:38:56,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614247451] [2022-12-13 14:38:56,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:38:56,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:38:56,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:38:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:38:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:38:59,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 796 [2022-12-13 14:38:59,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 670 transitions, 6749 flow. Second operand has 28 states, 28 states have (on average 288.2142857142857) internal successors, (8070), 28 states have internal predecessors, (8070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:38:59,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:38:59,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 796 [2022-12-13 14:38:59,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:39:14,891 INFO L130 PetriNetUnfolder]: 11105/18393 cut-off events. [2022-12-13 14:39:14,892 INFO L131 PetriNetUnfolder]: For 193802/193802 co-relation queries the response was YES. [2022-12-13 14:39:14,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99235 conditions, 18393 events. 11105/18393 cut-off events. For 193802/193802 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 138345 event pairs, 1384 based on Foata normal form. 30/17917 useless extension candidates. Maximal degree in co-relation 99123. Up to 7430 conditions per place. [2022-12-13 14:39:15,064 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 1130 selfloop transitions, 685 changer transitions 61/1876 dead transitions. [2022-12-13 14:39:15,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1876 transitions, 21508 flow [2022-12-13 14:39:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 14:39:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-13 14:39:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 18268 transitions. [2022-12-13 14:39:15,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3701572378019128 [2022-12-13 14:39:15,076 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 18268 transitions. [2022-12-13 14:39:15,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 18268 transitions. [2022-12-13 14:39:15,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:39:15,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 18268 transitions. [2022-12-13 14:39:15,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 294.64516129032256) internal successors, (18268), 62 states have internal predecessors, (18268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:15,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 796.0) internal successors, (50148), 63 states have internal predecessors, (50148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:15,128 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 796.0) internal successors, (50148), 63 states have internal predecessors, (50148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:15,128 INFO L175 Difference]: Start difference. First operand has 254 places, 670 transitions, 6749 flow. Second operand 62 states and 18268 transitions. [2022-12-13 14:39:15,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1876 transitions, 21508 flow [2022-12-13 14:39:17,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1876 transitions, 20748 flow, removed 357 selfloop flow, removed 9 redundant places. [2022-12-13 14:39:17,528 INFO L231 Difference]: Finished difference. Result has 335 places, 1223 transitions, 15412 flow [2022-12-13 14:39:17,528 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=15412, PETRI_PLACES=335, PETRI_TRANSITIONS=1223} [2022-12-13 14:39:17,529 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2022-12-13 14:39:17,529 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1223 transitions, 15412 flow [2022-12-13 14:39:17,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 288.2142857142857) internal successors, (8070), 28 states have internal predecessors, (8070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:17,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:39:17,530 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:39:17,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:39:17,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 14:39:17,732 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:39:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:39:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1684003951, now seen corresponding path program 6 times [2022-12-13 14:39:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:39:17,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202520655] [2022-12-13 14:39:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:39:17,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:39:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:39:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:39:18,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:39:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202520655] [2022-12-13 14:39:18,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202520655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:39:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424100468] [2022-12-13 14:39:18,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:39:18,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:39:18,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:39:18,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:39:18,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:39:18,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:39:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:39:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 14:39:18,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:39:18,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 155 [2022-12-13 14:39:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:39:19,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:39:19,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:39:19,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 117 [2022-12-13 14:39:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:39:19,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424100468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:39:19,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:39:19,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 25 [2022-12-13 14:39:19,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516613419] [2022-12-13 14:39:19,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:39:19,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:39:19,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:39:19,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:39:19,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:39:22,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 796 [2022-12-13 14:39:22,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1223 transitions, 15412 flow. Second operand has 26 states, 26 states have (on average 288.3076923076923) internal successors, (7496), 26 states have internal predecessors, (7496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:22,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:39:22,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 796 [2022-12-13 14:39:22,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:39:34,339 INFO L130 PetriNetUnfolder]: 14131/24004 cut-off events. [2022-12-13 14:39:34,339 INFO L131 PetriNetUnfolder]: For 396452/396452 co-relation queries the response was YES. [2022-12-13 14:39:34,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155680 conditions, 24004 events. 14131/24004 cut-off events. For 396452/396452 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 193170 event pairs, 2280 based on Foata normal form. 44/23770 useless extension candidates. Maximal degree in co-relation 155538. Up to 9786 conditions per place. [2022-12-13 14:39:34,614 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 1441 selfloop transitions, 609 changer transitions 87/2137 dead transitions. [2022-12-13 14:39:34,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 2137 transitions, 31001 flow [2022-12-13 14:39:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:39:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 14:39:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7714 transitions. [2022-12-13 14:39:34,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37272902976420563 [2022-12-13 14:39:34,619 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7714 transitions. [2022-12-13 14:39:34,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7714 transitions. [2022-12-13 14:39:34,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:39:34,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7714 transitions. [2022-12-13 14:39:34,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 296.6923076923077) internal successors, (7714), 26 states have internal predecessors, (7714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:34,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 796.0) internal successors, (21492), 27 states have internal predecessors, (21492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:34,638 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 796.0) internal successors, (21492), 27 states have internal predecessors, (21492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:34,638 INFO L175 Difference]: Start difference. First operand has 335 places, 1223 transitions, 15412 flow. Second operand 26 states and 7714 transitions. [2022-12-13 14:39:34,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 2137 transitions, 31001 flow [2022-12-13 14:39:43,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 2137 transitions, 26867 flow, removed 1963 selfloop flow, removed 7 redundant places. [2022-12-13 14:39:43,518 INFO L231 Difference]: Finished difference. Result has 363 places, 1406 transitions, 16965 flow [2022-12-13 14:39:43,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=13100, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16965, PETRI_PLACES=363, PETRI_TRANSITIONS=1406} [2022-12-13 14:39:43,520 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 333 predicate places. [2022-12-13 14:39:43,520 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1406 transitions, 16965 flow [2022-12-13 14:39:43,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 288.3076923076923) internal successors, (7496), 26 states have internal predecessors, (7496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:43,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:39:43,521 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:39:43,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:39:43,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:39:43,723 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:39:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:39:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash 327763265, now seen corresponding path program 7 times [2022-12-13 14:39:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:39:43,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297993379] [2022-12-13 14:39:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:39:43,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:39:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:39:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:39:44,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:39:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297993379] [2022-12-13 14:39:44,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297993379] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:39:44,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945481784] [2022-12-13 14:39:44,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:39:44,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:39:44,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:39:44,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:39:44,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:39:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:39:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 14:39:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:39:44,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 84 [2022-12-13 14:39:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:39:45,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:39:45,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:39:45,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 74 [2022-12-13 14:39:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:39:45,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945481784] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:39:45,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:39:45,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2022-12-13 14:39:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829768098] [2022-12-13 14:39:45,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:39:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 14:39:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:39:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 14:39:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:39:48,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 796 [2022-12-13 14:39:48,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1406 transitions, 16965 flow. Second operand has 27 states, 27 states have (on average 289.22222222222223) internal successors, (7809), 27 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:39:48,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:39:48,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 796 [2022-12-13 14:39:48,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:03,452 INFO L130 PetriNetUnfolder]: 16368/27855 cut-off events. [2022-12-13 14:40:03,452 INFO L131 PetriNetUnfolder]: For 406363/406363 co-relation queries the response was YES. [2022-12-13 14:40:03,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177721 conditions, 27855 events. 16368/27855 cut-off events. For 406363/406363 co-relation queries the response was YES. Maximal size of possible extension queue 1402. Compared 229022 event pairs, 3093 based on Foata normal form. 96/27615 useless extension candidates. Maximal degree in co-relation 177569. Up to 11169 conditions per place. [2022-12-13 14:40:03,866 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 1220 selfloop transitions, 742 changer transitions 267/2229 dead transitions. [2022-12-13 14:40:03,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 2229 transitions, 31400 flow [2022-12-13 14:40:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 14:40:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-13 14:40:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 13558 transitions. [2022-12-13 14:40:03,875 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3702752894909329 [2022-12-13 14:40:03,875 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 13558 transitions. [2022-12-13 14:40:03,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 13558 transitions. [2022-12-13 14:40:03,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:03,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 13558 transitions. [2022-12-13 14:40:03,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 294.7391304347826) internal successors, (13558), 46 states have internal predecessors, (13558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:03,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 796.0) internal successors, (37412), 47 states have internal predecessors, (37412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:03,908 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 796.0) internal successors, (37412), 47 states have internal predecessors, (37412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:03,909 INFO L175 Difference]: Start difference. First operand has 363 places, 1406 transitions, 16965 flow. Second operand 46 states and 13558 transitions. [2022-12-13 14:40:03,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 2229 transitions, 31400 flow [2022-12-13 14:40:12,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 2229 transitions, 30831 flow, removed 155 selfloop flow, removed 10 redundant places. [2022-12-13 14:40:12,281 INFO L231 Difference]: Finished difference. Result has 410 places, 1558 transitions, 21621 flow [2022-12-13 14:40:12,282 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=16491, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=21621, PETRI_PLACES=410, PETRI_TRANSITIONS=1558} [2022-12-13 14:40:12,282 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2022-12-13 14:40:12,282 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1558 transitions, 21621 flow [2022-12-13 14:40:12,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 289.22222222222223) internal successors, (7809), 27 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:12,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:12,283 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:12,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 14:40:12,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:12,485 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:40:12,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:12,486 INFO L85 PathProgramCache]: Analyzing trace with hash -64572119, now seen corresponding path program 8 times [2022-12-13 14:40:12,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:12,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244634140] [2022-12-13 14:40:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:12,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:40:13,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244634140] [2022-12-13 14:40:13,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244634140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415503167] [2022-12-13 14:40:13,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:40:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:13,149 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:13,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:40:13,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:40:13,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:40:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 14:40:13,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:40:13,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2022-12-13 14:40:13,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 111 [2022-12-13 14:40:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:40:14,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:15,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:40:15,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 151 [2022-12-13 14:40:15,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-12-13 14:40:15,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2022-12-13 14:40:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:40:15,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415503167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:15,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:40:15,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2022-12-13 14:40:15,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746690950] [2022-12-13 14:40:15,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:15,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 14:40:15,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 14:40:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=999, Unknown=1, NotChecked=0, Total=1122 [2022-12-13 14:40:17,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 796 [2022-12-13 14:40:17,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1558 transitions, 21621 flow. Second operand has 34 states, 34 states have (on average 254.02941176470588) internal successors, (8637), 34 states have internal predecessors, (8637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:17,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:17,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 796 [2022-12-13 14:40:17,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:40:37,536 INFO L130 PetriNetUnfolder]: 15978/26532 cut-off events. [2022-12-13 14:40:37,536 INFO L131 PetriNetUnfolder]: For 462471/462471 co-relation queries the response was YES. [2022-12-13 14:40:37,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183736 conditions, 26532 events. 15978/26532 cut-off events. For 462471/462471 co-relation queries the response was YES. Maximal size of possible extension queue 1355. Compared 209307 event pairs, 2662 based on Foata normal form. 18/26216 useless extension candidates. Maximal degree in co-relation 183565. Up to 12314 conditions per place. [2022-12-13 14:40:37,969 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 1277 selfloop transitions, 842 changer transitions 89/2208 dead transitions. [2022-12-13 14:40:37,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 2208 transitions, 34150 flow [2022-12-13 14:40:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 14:40:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 14:40:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 12497 transitions. [2022-12-13 14:40:37,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3270780988274707 [2022-12-13 14:40:37,984 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 12497 transitions. [2022-12-13 14:40:37,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 12497 transitions. [2022-12-13 14:40:37,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:40:37,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 12497 transitions. [2022-12-13 14:40:38,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 260.3541666666667) internal successors, (12497), 48 states have internal predecessors, (12497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:38,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 796.0) internal successors, (39004), 49 states have internal predecessors, (39004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:38,030 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 796.0) internal successors, (39004), 49 states have internal predecessors, (39004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:38,030 INFO L175 Difference]: Start difference. First operand has 410 places, 1558 transitions, 21621 flow. Second operand 48 states and 12497 transitions. [2022-12-13 14:40:38,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 2208 transitions, 34150 flow [2022-12-13 14:40:48,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 2208 transitions, 33142 flow, removed 454 selfloop flow, removed 14 redundant places. [2022-12-13 14:40:48,311 INFO L231 Difference]: Finished difference. Result has 454 places, 1711 transitions, 25547 flow [2022-12-13 14:40:48,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=20815, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=695, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=25547, PETRI_PLACES=454, PETRI_TRANSITIONS=1711} [2022-12-13 14:40:48,312 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 424 predicate places. [2022-12-13 14:40:48,313 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1711 transitions, 25547 flow [2022-12-13 14:40:48,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 254.02941176470588) internal successors, (8637), 34 states have internal predecessors, (8637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:48,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:40:48,314 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:48,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:40:48,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:48,515 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:40:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash -58484821, now seen corresponding path program 9 times [2022-12-13 14:40:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:48,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871012958] [2022-12-13 14:40:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:48,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:40:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:40:49,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:49,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871012958] [2022-12-13 14:40:49,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871012958] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:49,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688259258] [2022-12-13 14:40:49,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:40:49,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:49,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:49,490 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:49,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:40:49,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:40:49,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:40:49,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 14:40:49,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:49,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:40:49,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2022-12-13 14:40:49,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 155 [2022-12-13 14:40:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:40:50,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:51,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:40:51,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 167 [2022-12-13 14:40:51,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2022-12-13 14:40:51,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2022-12-13 14:40:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:40:51,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688259258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:51,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:40:51,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 14:40:51,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064781543] [2022-12-13 14:40:51,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 14:40:51,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 14:40:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1065, Unknown=1, NotChecked=0, Total=1190 [2022-12-13 14:40:53,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 796 [2022-12-13 14:40:54,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1711 transitions, 25547 flow. Second operand has 35 states, 35 states have (on average 253.97142857142856) internal successors, (8889), 35 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:40:54,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:40:54,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 796 [2022-12-13 14:40:54,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:41:14,478 INFO L130 PetriNetUnfolder]: 17387/28904 cut-off events. [2022-12-13 14:41:14,478 INFO L131 PetriNetUnfolder]: For 628432/628432 co-relation queries the response was YES. [2022-12-13 14:41:14,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213919 conditions, 28904 events. 17387/28904 cut-off events. For 628432/628432 co-relation queries the response was YES. Maximal size of possible extension queue 1503. Compared 231755 event pairs, 3034 based on Foata normal form. 32/28566 useless extension candidates. Maximal degree in co-relation 213731. Up to 12817 conditions per place. [2022-12-13 14:41:14,937 INFO L137 encePairwiseOnDemand]: 785/796 looper letters, 1522 selfloop transitions, 731 changer transitions 47/2300 dead transitions. [2022-12-13 14:41:14,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 2300 transitions, 38304 flow [2022-12-13 14:41:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:41:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 14:41:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7601 transitions. [2022-12-13 14:41:14,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32927568878877145 [2022-12-13 14:41:14,944 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7601 transitions. [2022-12-13 14:41:14,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7601 transitions. [2022-12-13 14:41:14,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:41:14,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7601 transitions. [2022-12-13 14:41:14,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 262.1034482758621) internal successors, (7601), 29 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:14,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 796.0) internal successors, (23880), 30 states have internal predecessors, (23880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:14,961 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 796.0) internal successors, (23880), 30 states have internal predecessors, (23880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:14,961 INFO L175 Difference]: Start difference. First operand has 454 places, 1711 transitions, 25547 flow. Second operand 29 states and 7601 transitions. [2022-12-13 14:41:14,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 2300 transitions, 38304 flow [2022-12-13 14:41:26,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 2300 transitions, 37431 flow, removed 368 selfloop flow, removed 15 redundant places. [2022-12-13 14:41:27,018 INFO L231 Difference]: Finished difference. Result has 474 places, 1813 transitions, 28362 flow [2022-12-13 14:41:27,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=24898, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=28362, PETRI_PLACES=474, PETRI_TRANSITIONS=1813} [2022-12-13 14:41:27,019 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 444 predicate places. [2022-12-13 14:41:27,019 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 1813 transitions, 28362 flow [2022-12-13 14:41:27,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 253.97142857142856) internal successors, (8889), 35 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:27,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:41:27,020 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:27,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 14:41:27,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 14:41:27,221 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:41:27,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2025225405, now seen corresponding path program 10 times [2022-12-13 14:41:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:27,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623212251] [2022-12-13 14:41:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:27,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:41:27,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:27,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623212251] [2022-12-13 14:41:27,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623212251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:41:27,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684263915] [2022-12-13 14:41:27,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:41:27,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:27,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:41:27,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:41:27,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:41:27,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:41:27,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:41:27,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 14:41:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:41:28,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:41:28,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2022-12-13 14:41:28,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 109 [2022-12-13 14:41:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:41:28,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:41:29,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:41:29,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 130 [2022-12-13 14:41:29,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-12-13 14:41:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:41:29,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684263915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:41:29,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:41:29,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 14:41:29,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198589541] [2022-12-13 14:41:29,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:41:29,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 14:41:29,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:29,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 14:41:29,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=702, Unknown=2, NotChecked=0, Total=812 [2022-12-13 14:41:31,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 796 [2022-12-13 14:41:31,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 1813 transitions, 28362 flow. Second operand has 29 states, 29 states have (on average 270.37931034482756) internal successors, (7841), 29 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:31,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:41:31,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 796 [2022-12-13 14:41:31,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:41:50,077 INFO L130 PetriNetUnfolder]: 19211/32236 cut-off events. [2022-12-13 14:41:50,077 INFO L131 PetriNetUnfolder]: For 834121/834121 co-relation queries the response was YES. [2022-12-13 14:41:50,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248160 conditions, 32236 events. 19211/32236 cut-off events. For 834121/834121 co-relation queries the response was YES. Maximal size of possible extension queue 1743. Compared 266757 event pairs, 3480 based on Foata normal form. 23/31889 useless extension candidates. Maximal degree in co-relation 247965. Up to 12816 conditions per place. [2022-12-13 14:41:50,645 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 1571 selfloop transitions, 833 changer transitions 88/2492 dead transitions. [2022-12-13 14:41:50,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 2492 transitions, 43358 flow [2022-12-13 14:41:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:41:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 14:41:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7229 transitions. [2022-12-13 14:41:50,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3492945496714341 [2022-12-13 14:41:50,651 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7229 transitions. [2022-12-13 14:41:50,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7229 transitions. [2022-12-13 14:41:50,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:41:50,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7229 transitions. [2022-12-13 14:41:50,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 278.03846153846155) internal successors, (7229), 26 states have internal predecessors, (7229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:50,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 796.0) internal successors, (21492), 27 states have internal predecessors, (21492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:50,666 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 796.0) internal successors, (21492), 27 states have internal predecessors, (21492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:50,666 INFO L175 Difference]: Start difference. First operand has 474 places, 1813 transitions, 28362 flow. Second operand 26 states and 7229 transitions. [2022-12-13 14:41:50,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 2492 transitions, 43358 flow [2022-12-13 14:42:09,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 2492 transitions, 42471 flow, removed 343 selfloop flow, removed 10 redundant places. [2022-12-13 14:42:09,250 INFO L231 Difference]: Finished difference. Result has 497 places, 1919 transitions, 31883 flow [2022-12-13 14:42:09,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=27617, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1056, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=31883, PETRI_PLACES=497, PETRI_TRANSITIONS=1919} [2022-12-13 14:42:09,252 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 467 predicate places. [2022-12-13 14:42:09,252 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1919 transitions, 31883 flow [2022-12-13 14:42:09,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 270.37931034482756) internal successors, (7841), 29 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:42:09,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:42:09,254 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:09,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 14:42:09,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 14:42:09,455 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:42:09,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:09,455 INFO L85 PathProgramCache]: Analyzing trace with hash -792634377, now seen corresponding path program 11 times [2022-12-13 14:42:09,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:09,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072936592] [2022-12-13 14:42:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:09,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:42:10,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:10,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072936592] [2022-12-13 14:42:10,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072936592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:10,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933537418] [2022-12-13 14:42:10,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:42:10,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:10,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:10,190 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:10,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 14:42:10,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 14:42:10,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:42:10,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 14:42:10,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:10,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:10,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2022-12-13 14:42:10,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 87 [2022-12-13 14:42:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:42:11,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:11,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:42:11,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 111 [2022-12-13 14:42:11,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-12-13 14:42:11,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-12-13 14:42:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:42:12,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933537418] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:42:12,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:42:12,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 14:42:12,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887790507] [2022-12-13 14:42:12,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:12,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 14:42:12,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:12,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 14:42:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1072, Unknown=1, NotChecked=0, Total=1190 [2022-12-13 14:42:14,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 796 [2022-12-13 14:42:14,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1919 transitions, 31883 flow. Second operand has 35 states, 35 states have (on average 253.97142857142856) internal successors, (8889), 35 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:42:14,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:42:14,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 796 [2022-12-13 14:42:14,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:42:44,429 INFO L130 PetriNetUnfolder]: 22272/37924 cut-off events. [2022-12-13 14:42:44,429 INFO L131 PetriNetUnfolder]: For 1133680/1133680 co-relation queries the response was YES. [2022-12-13 14:42:45,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304089 conditions, 37924 events. 22272/37924 cut-off events. For 1133680/1133680 co-relation queries the response was YES. Maximal size of possible extension queue 2051. Compared 328491 event pairs, 3604 based on Foata normal form. 21/37489 useless extension candidates. Maximal degree in co-relation 303885. Up to 13518 conditions per place. [2022-12-13 14:42:45,244 INFO L137 encePairwiseOnDemand]: 785/796 looper letters, 1798 selfloop transitions, 1044 changer transitions 50/2892 dead transitions. [2022-12-13 14:42:45,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 2892 transitions, 51523 flow [2022-12-13 14:42:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 14:42:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-13 14:42:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 14846 transitions. [2022-12-13 14:42:45,255 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3272062064709512 [2022-12-13 14:42:45,255 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 14846 transitions. [2022-12-13 14:42:45,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 14846 transitions. [2022-12-13 14:42:45,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:42:45,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 14846 transitions. [2022-12-13 14:42:45,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 260.4561403508772) internal successors, (14846), 57 states have internal predecessors, (14846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:42:45,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 796.0) internal successors, (46168), 58 states have internal predecessors, (46168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:42:45,290 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 796.0) internal successors, (46168), 58 states have internal predecessors, (46168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:42:45,290 INFO L175 Difference]: Start difference. First operand has 497 places, 1919 transitions, 31883 flow. Second operand 57 states and 14846 transitions. [2022-12-13 14:42:45,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 2892 transitions, 51523 flow [2022-12-13 14:43:07,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 2892 transitions, 50767 flow, removed 185 selfloop flow, removed 14 redundant places. [2022-12-13 14:43:07,154 INFO L231 Difference]: Finished difference. Result has 564 places, 2255 transitions, 41240 flow [2022-12-13 14:43:07,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=31280, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=41240, PETRI_PLACES=564, PETRI_TRANSITIONS=2255} [2022-12-13 14:43:07,156 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 534 predicate places. [2022-12-13 14:43:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 2255 transitions, 41240 flow [2022-12-13 14:43:07,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 253.97142857142856) internal successors, (8889), 35 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:43:07,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:43:07,157 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:43:07,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 14:43:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:43:07,358 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:43:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash -5764095, now seen corresponding path program 12 times [2022-12-13 14:43:07,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:07,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248618462] [2022-12-13 14:43:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:07,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:43:08,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:08,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248618462] [2022-12-13 14:43:08,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248618462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:08,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155907579] [2022-12-13 14:43:08,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:43:08,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:08,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:43:08,799 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:43:08,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 14:43:08,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:43:08,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:43:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 14:43:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:43:09,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:09,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2022-12-13 14:43:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:09,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2022-12-13 14:43:09,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 129 [2022-12-13 14:43:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:43:10,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:43:13,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:43:13,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 157 [2022-12-13 14:43:13,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2022-12-13 14:43:13,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-12-13 14:43:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:43:13,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155907579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:43:13,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:43:13,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 38 [2022-12-13 14:43:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385323499] [2022-12-13 14:43:13,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:43:13,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 14:43:13,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 14:43:13,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1418, Unknown=6, NotChecked=0, Total=1560 [2022-12-13 14:43:18,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 796 [2022-12-13 14:43:18,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 2255 transitions, 41240 flow. Second operand has 40 states, 40 states have (on average 242.775) internal successors, (9711), 40 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:43:18,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:43:18,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 796 [2022-12-13 14:43:18,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:44:14,495 INFO L130 PetriNetUnfolder]: 30888/52515 cut-off events. [2022-12-13 14:44:14,495 INFO L131 PetriNetUnfolder]: For 2615808/2615808 co-relation queries the response was YES. [2022-12-13 14:44:15,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493245 conditions, 52515 events. 30888/52515 cut-off events. For 2615808/2615808 co-relation queries the response was YES. Maximal size of possible extension queue 2968. Compared 474661 event pairs, 5232 based on Foata normal form. 44/51895 useless extension candidates. Maximal degree in co-relation 493034. Up to 12582 conditions per place. [2022-12-13 14:44:15,945 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 2763 selfloop transitions, 1263 changer transitions 97/4123 dead transitions. [2022-12-13 14:44:15,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 4123 transitions, 82970 flow [2022-12-13 14:44:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-13 14:44:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-12-13 14:44:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 18971 transitions. [2022-12-13 14:44:15,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.313590981221899 [2022-12-13 14:44:15,959 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 18971 transitions. [2022-12-13 14:44:15,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 18971 transitions. [2022-12-13 14:44:15,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:44:15,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 18971 transitions. [2022-12-13 14:44:15,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 249.6184210526316) internal successors, (18971), 76 states have internal predecessors, (18971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:15,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 796.0) internal successors, (61292), 77 states have internal predecessors, (61292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:16,004 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 796.0) internal successors, (61292), 77 states have internal predecessors, (61292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:44:16,004 INFO L175 Difference]: Start difference. First operand has 564 places, 2255 transitions, 41240 flow. Second operand 76 states and 18971 transitions. [2022-12-13 14:44:16,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 4123 transitions, 82970 flow [2022-12-13 14:45:30,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 4123 transitions, 78622 flow, removed 2036 selfloop flow, removed 19 redundant places. [2022-12-13 14:45:30,543 INFO L231 Difference]: Finished difference. Result has 662 places, 2822 transitions, 56320 flow [2022-12-13 14:45:30,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=38436, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=743, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=56320, PETRI_PLACES=662, PETRI_TRANSITIONS=2822} [2022-12-13 14:45:30,546 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 632 predicate places. [2022-12-13 14:45:30,546 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 2822 transitions, 56320 flow [2022-12-13 14:45:30,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 242.775) internal successors, (9711), 40 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:30,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:45:30,548 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:45:30,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 14:45:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 14:45:30,749 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:45:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:45:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -704971647, now seen corresponding path program 13 times [2022-12-13 14:45:30,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:45:30,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323116947] [2022-12-13 14:45:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:45:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:45:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:45:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:45:31,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:45:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323116947] [2022-12-13 14:45:31,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323116947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:45:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894194802] [2022-12-13 14:45:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:45:31,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:45:31,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:45:31,562 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:45:31,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 14:45:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:45:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 14:45:31,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:45:31,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 114 [2022-12-13 14:45:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:45:32,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:45:33,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:45:33,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 114 [2022-12-13 14:45:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:45:33,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894194802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:45:33,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:45:33,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2022-12-13 14:45:33,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300659095] [2022-12-13 14:45:33,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:45:33,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:45:33,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:45:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:45:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:45:36,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 796 [2022-12-13 14:45:36,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 2822 transitions, 56320 flow. Second operand has 28 states, 28 states have (on average 288.14285714285717) internal successors, (8068), 28 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:45:36,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:45:36,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 796 [2022-12-13 14:45:36,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:46:31,910 INFO L130 PetriNetUnfolder]: 35433/60253 cut-off events. [2022-12-13 14:46:31,910 INFO L131 PetriNetUnfolder]: For 4864809/4864809 co-relation queries the response was YES. [2022-12-13 14:46:33,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640585 conditions, 60253 events. 35433/60253 cut-off events. For 4864809/4864809 co-relation queries the response was YES. Maximal size of possible extension queue 3434. Compared 555447 event pairs, 6928 based on Foata normal form. 17/59514 useless extension candidates. Maximal degree in co-relation 640318. Up to 24415 conditions per place. [2022-12-13 14:46:33,895 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 2117 selfloop transitions, 1732 changer transitions 49/3898 dead transitions. [2022-12-13 14:46:33,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 3898 transitions, 86590 flow [2022-12-13 14:46:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 14:46:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-13 14:46:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 18185 transitions. [2022-12-13 14:46:33,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3684754417247528 [2022-12-13 14:46:33,913 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 18185 transitions. [2022-12-13 14:46:33,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 18185 transitions. [2022-12-13 14:46:33,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:46:33,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 18185 transitions. [2022-12-13 14:46:33,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 293.30645161290323) internal successors, (18185), 62 states have internal predecessors, (18185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:46:33,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 796.0) internal successors, (50148), 63 states have internal predecessors, (50148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:46:33,964 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 796.0) internal successors, (50148), 63 states have internal predecessors, (50148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:46:33,964 INFO L175 Difference]: Start difference. First operand has 662 places, 2822 transitions, 56320 flow. Second operand 62 states and 18185 transitions. [2022-12-13 14:46:33,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 3898 transitions, 86590 flow [2022-12-13 14:49:03,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 701 places, 3898 transitions, 81635 flow, removed 2363 selfloop flow, removed 15 redundant places. [2022-12-13 14:49:03,423 INFO L231 Difference]: Finished difference. Result has 735 places, 3348 transitions, 70749 flow [2022-12-13 14:49:03,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=52295, PETRI_DIFFERENCE_MINUEND_PLACES=640, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=70749, PETRI_PLACES=735, PETRI_TRANSITIONS=3348} [2022-12-13 14:49:03,425 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 705 predicate places. [2022-12-13 14:49:03,425 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 3348 transitions, 70749 flow [2022-12-13 14:49:03,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 288.14285714285717) internal successors, (8068), 28 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:03,426 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:49:03,426 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:49:03,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 14:49:03,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 14:49:03,627 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 14:49:03,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:49:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1205763771, now seen corresponding path program 14 times [2022-12-13 14:49:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:49:03,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148771445] [2022-12-13 14:49:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:49:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:49:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:49:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:49:04,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:04,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148771445] [2022-12-13 14:49:04,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148771445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:49:04,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585587169] [2022-12-13 14:49:04,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:49:04,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:49:04,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:49:04,347 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:49:04,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47a2d8c-c43a-4f9c-a04a-6c830a92e492/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:49:04,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:49:04,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:49:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 14:49:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:49:04,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 150 [2022-12-13 14:49:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:49:05,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:49:06,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:49:06,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 95 [2022-12-13 14:49:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:49:06,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585587169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:49:06,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:49:06,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2022-12-13 14:49:06,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386557618] [2022-12-13 14:49:06,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:49:06,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:49:06,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:06,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:49:06,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:49:08,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 796 [2022-12-13 14:49:08,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 3348 transitions, 70749 flow. Second operand has 24 states, 24 states have (on average 297.5833333333333) internal successors, (7142), 24 states have internal predecessors, (7142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:49:08,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:49:08,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 796 [2022-12-13 14:49:08,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:50:33,017 INFO L130 PetriNetUnfolder]: 41770/72051 cut-off events. [2022-12-13 14:50:33,017 INFO L131 PetriNetUnfolder]: For 8506127/8506127 co-relation queries the response was YES. [2022-12-13 14:50:35,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865882 conditions, 72051 events. 41770/72051 cut-off events. For 8506127/8506127 co-relation queries the response was YES. Maximal size of possible extension queue 4063. Compared 694442 event pairs, 8661 based on Foata normal form. 128/71423 useless extension candidates. Maximal degree in co-relation 865589. Up to 22933 conditions per place. [2022-12-13 14:50:35,821 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 2894 selfloop transitions, 1702 changer transitions 578/5174 dead transitions. [2022-12-13 14:50:35,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 840 places, 5174 transitions, 122611 flow [2022-12-13 14:50:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-12-13 14:50:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2022-12-13 14:50:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 33162 transitions. [2022-12-13 14:50:35,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3822092111935826 [2022-12-13 14:50:35,842 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 33162 transitions. [2022-12-13 14:50:35,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 33162 transitions. [2022-12-13 14:50:35,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:50:35,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 33162 transitions. [2022-12-13 14:50:35,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 304.23853211009174) internal successors, (33162), 109 states have internal predecessors, (33162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:50:35,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 796.0) internal successors, (87560), 110 states have internal predecessors, (87560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:50:35,912 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 796.0) internal successors, (87560), 110 states have internal predecessors, (87560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:50:35,912 INFO L175 Difference]: Start difference. First operand has 735 places, 3348 transitions, 70749 flow. Second operand 109 states and 33162 transitions. [2022-12-13 14:50:35,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 840 places, 5174 transitions, 122611 flow