./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R --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 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 --- 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-38b53e6 [2022-11-25 16:41:59,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:41:59,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:41:59,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:41:59,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:41:59,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:41:59,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:41:59,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:41:59,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:41:59,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:41:59,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:41:59,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:41:59,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:41:59,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:41:59,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:41:59,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:41:59,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:41:59,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:41:59,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:41:59,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:41:59,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:41:59,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:41:59,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:41:59,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:41:59,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:41:59,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:41:59,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:41:59,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:41:59,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:41:59,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:41:59,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:41:59,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:41:59,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:41:59,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:41:59,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:41:59,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:41:59,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:41:59,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:41:59,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:41:59,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:41:59,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:41:59,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:41:59,946 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:41:59,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:41:59,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:41:59,947 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:41:59,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:41:59,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:41:59,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:41:59,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:41:59,949 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:41:59,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:41:59,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:41:59,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:41:59,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:41:59,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:41:59,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:41:59,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:41:59,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:41:59,953 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:41:59,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:41:59,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:41:59,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:41:59,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:41:59,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:41:59,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:41:59,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:59,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:41:59,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:41:59,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:41:59,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:41:59,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:41:59,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:41:59,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:41:59,957 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:41:59,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:41:59,958 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_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 [2022-11-25 16:42:00,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:42:00,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:42:00,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:42:00,284 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:42:00,284 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:42:00,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2022-11-25 16:42:03,220 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:42:03,509 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:42:03,510 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2022-11-25 16:42:03,517 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/data/ccb46c9b9/e81db4c8c7be4fc19802fc94df4b2e59/FLAG05490e71b [2022-11-25 16:42:03,535 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/data/ccb46c9b9/e81db4c8c7be4fc19802fc94df4b2e59 [2022-11-25 16:42:03,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:42:03,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:42:03,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:03,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:42:03,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:42:03,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9b90f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03, skipping insertion in model container [2022-11-25 16:42:03,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:42:03,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:42:03,748 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:42:03,749 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:42:03,753 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:42:03,754 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:42:03,756 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:42:03,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:42:03,758 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:42:03,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:42:03,770 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_fd58abee-d2f8-4f40-9260-811a4223accd/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2612,2625] [2022-11-25 16:42:03,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:03,790 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:42:03,804 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:42:03,805 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:42:03,806 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:42:03,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:42:03,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:42:03,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:42:03,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:42:03,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:42:03,817 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_fd58abee-d2f8-4f40-9260-811a4223accd/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2612,2625] [2022-11-25 16:42:03,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:03,833 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:42:03,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03 WrapperNode [2022-11-25 16:42:03,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:03,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:03,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:42:03,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:42:03,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,873 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 117 [2022-11-25 16:42:03,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:03,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:42:03,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:42:03,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:42:03,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,923 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:42:03,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:42:03,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:42:03,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:42:03,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (1/1) ... [2022-11-25 16:42:03,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:42:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:03,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:42:03,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:42:04,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:42:04,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 16:42:04,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 16:42:04,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 16:42:04,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 16:42:04,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 16:42:04,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 16:42:04,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-25 16:42:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-25 16:42:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:42:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:42:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:42:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 16:42:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 16:42:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:42:04,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:42:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:42:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:42:04,029 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 16:42:04,167 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:42:04,169 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:42:04,460 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:42:04,511 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:42:04,511 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 16:42:04,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:04 BoogieIcfgContainer [2022-11-25 16:42:04,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:42:04,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:42:04,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:42:04,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:42:04,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:42:03" (1/3) ... [2022-11-25 16:42:04,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7aea8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:04, skipping insertion in model container [2022-11-25 16:42:04,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:03" (2/3) ... [2022-11-25 16:42:04,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7aea8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:04, skipping insertion in model container [2022-11-25 16:42:04,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:04" (3/3) ... [2022-11-25 16:42:04,536 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2022-11-25 16:42:04,545 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 16:42:04,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:42:04,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:42:04,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:42:04,655 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 16:42:04,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 133 transitions, 298 flow [2022-11-25 16:42:04,779 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2022-11-25 16:42:04,779 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 16:42:04,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 129 events. 10/129 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2022-11-25 16:42:04,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 133 transitions, 298 flow [2022-11-25 16:42:04,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 116 transitions, 256 flow [2022-11-25 16:42:04,804 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:42:04,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 116 transitions, 256 flow [2022-11-25 16:42:04,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 116 transitions, 256 flow [2022-11-25 16:42:04,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 116 transitions, 256 flow [2022-11-25 16:42:04,865 INFO L130 PetriNetUnfolder]: 10/116 cut-off events. [2022-11-25 16:42:04,865 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 16:42:04,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 116 events. 10/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2022-11-25 16:42:04,869 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2022-11-25 16:42:10,105 INFO L134 LiptonReduction]: Checked pairs total: 2606 [2022-11-25 16:42:10,105 INFO L136 LiptonReduction]: Total number of compositions: 101 [2022-11-25 16:42:10,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:42:10,131 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;@47aaced1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:42:10,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 16:42:10,141 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2022-11-25 16:42:10,141 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 16:42:10,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:10,142 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:10,143 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 2 more)] === [2022-11-25 16:42:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1762292979, now seen corresponding path program 1 times [2022-11-25 16:42:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:10,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610694152] [2022-11-25 16:42:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:10,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:10,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610694152] [2022-11-25 16:42:10,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610694152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:10,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:10,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:42:10,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917209355] [2022-11-25 16:42:10,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:10,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:10,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:10,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:11,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 234 [2022-11-25 16:42:11,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:11,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 234 [2022-11-25 16:42:11,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:11,435 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2022-11-25 16:42:11,436 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2022-11-25 16:42:11,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5864 event pairs, 215 based on Foata normal form. 1/1052 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2022-11-25 16:42:11,455 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2022-11-25 16:42:11,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2022-11-25 16:42:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:42:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2022-11-25 16:42:11,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2022-11-25 16:42:11,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2022-11-25 16:42:11,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2022-11-25 16:42:11,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:11,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2022-11-25 16:42:11,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,519 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 387 transitions. [2022-11-25 16:42:11,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 233 flow [2022-11-25 16:42:11,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-25 16:42:11,530 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2022-11-25 16:42:11,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2022-11-25 16:42:11,542 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2022-11-25 16:42:11,542 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2022-11-25 16:42:11,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:11,543 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:11,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:42:11,544 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 2 more)] === [2022-11-25 16:42:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1559089578, now seen corresponding path program 1 times [2022-11-25 16:42:11,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:11,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375493852] [2022-11-25 16:42:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:11,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:11,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:11,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375493852] [2022-11-25 16:42:11,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375493852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:11,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:11,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:11,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638420908] [2022-11-25 16:42:11,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:11,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:11,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:11,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:11,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 234 [2022-11-25 16:42:11,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:11,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 234 [2022-11-25 16:42:11,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:12,405 INFO L130 PetriNetUnfolder]: 1689/2357 cut-off events. [2022-11-25 16:42:12,405 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-11-25 16:42:12,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5461 conditions, 2357 events. 1689/2357 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 10439 event pairs, 415 based on Foata normal form. 212/2566 useless extension candidates. Maximal degree in co-relation 1431. Up to 1320 conditions per place. [2022-11-25 16:42:12,423 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 56 selfloop transitions, 4 changer transitions 18/80 dead transitions. [2022-11-25 16:42:12,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 80 transitions, 371 flow [2022-11-25 16:42:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2022-11-25 16:42:12,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5162393162393163 [2022-11-25 16:42:12,427 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2022-11-25 16:42:12,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2022-11-25 16:42:12,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:12,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2022-11-25 16:42:12,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:12,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:12,435 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:12,436 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 604 transitions. [2022-11-25 16:42:12,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 80 transitions, 371 flow [2022-11-25 16:42:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 80 transitions, 367 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:12,440 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 121 flow [2022-11-25 16:42:12,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2022-11-25 16:42:12,441 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2022-11-25 16:42:12,442 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 121 flow [2022-11-25 16:42:12,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:12,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:12,443 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:12,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:42:12,444 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 2 more)] === [2022-11-25 16:42:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:12,447 INFO L85 PathProgramCache]: Analyzing trace with hash 510632622, now seen corresponding path program 1 times [2022-11-25 16:42:12,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:12,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860128242] [2022-11-25 16:42:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:12,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:12,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:12,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860128242] [2022-11-25 16:42:12,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860128242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:12,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:12,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:12,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480616658] [2022-11-25 16:42:12,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:12,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:12,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:12,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:12,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:12,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 234 [2022-11-25 16:42:12,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:12,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:12,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 234 [2022-11-25 16:42:12,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:13,369 INFO L130 PetriNetUnfolder]: 2076/2886 cut-off events. [2022-11-25 16:42:13,369 INFO L131 PetriNetUnfolder]: For 2588/2600 co-relation queries the response was YES. [2022-11-25 16:42:13,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8045 conditions, 2886 events. 2076/2886 cut-off events. For 2588/2600 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13138 event pairs, 789 based on Foata normal form. 136/3015 useless extension candidates. Maximal degree in co-relation 5900. Up to 1906 conditions per place. [2022-11-25 16:42:13,392 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 58 selfloop transitions, 4 changer transitions 16/80 dead transitions. [2022-11-25 16:42:13,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 80 transitions, 429 flow [2022-11-25 16:42:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 600 transitions. [2022-11-25 16:42:13,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2022-11-25 16:42:13,395 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 600 transitions. [2022-11-25 16:42:13,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 600 transitions. [2022-11-25 16:42:13,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:13,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 600 transitions. [2022-11-25 16:42:13,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:13,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:13,401 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:13,401 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 121 flow. Second operand 5 states and 600 transitions. [2022-11-25 16:42:13,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 80 transitions, 429 flow [2022-11-25 16:42:13,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 80 transitions, 415 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:13,412 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 149 flow [2022-11-25 16:42:13,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2022-11-25 16:42:13,414 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2022-11-25 16:42:13,415 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 149 flow [2022-11-25 16:42:13,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:13,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:13,416 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:13,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:42:13,417 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 2 more)] === [2022-11-25 16:42:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1277643410, now seen corresponding path program 2 times [2022-11-25 16:42:13,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:13,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081290936] [2022-11-25 16:42:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:13,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:13,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:13,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081290936] [2022-11-25 16:42:13,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081290936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:13,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:13,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:42:13,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835501889] [2022-11-25 16:42:13,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:13,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:13,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:42:13,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2022-11-25 16:42:13,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:13,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:13,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2022-11-25 16:42:13,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:14,048 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][51], [40#L62-4true, 30#L51-4true, 17#L72-4true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 165#(and (<= (+ (* (div thread1Thread1of1ForFork2_~i~0 4294967296) 4294967296) ~N~0) (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork2_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0), 94#L95-2true]) [2022-11-25 16:42:14,048 INFO L383 tUnfolder$Statistics]: this new event has 18 ancestors and is cut-off event [2022-11-25 16:42:14,049 INFO L386 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-11-25 16:42:14,049 INFO L386 tUnfolder$Statistics]: existing Event has 17 ancestors and is cut-off event [2022-11-25 16:42:14,049 INFO L386 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-11-25 16:42:14,101 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][51], [17#L72-4true, 40#L62-4true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 165#(and (<= (+ (* (div thread1Thread1of1ForFork2_~i~0 4294967296) 4294967296) ~N~0) (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork2_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 46#thread2EXITtrue, Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 141#(= ~counter~0 0), 94#L95-2true]) [2022-11-25 16:42:14,102 INFO L383 tUnfolder$Statistics]: this new event has 19 ancestors and is cut-off event [2022-11-25 16:42:14,102 INFO L386 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-11-25 16:42:14,102 INFO L386 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-11-25 16:42:14,102 INFO L386 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-11-25 16:42:14,109 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][51], [40#L62-4true, 17#L72-4true, 30#L51-4true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), 61#L96-1true, Black: 165#(and (<= (+ (* (div thread1Thread1of1ForFork2_~i~0 4294967296) 4294967296) ~N~0) (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork2_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0)]) [2022-11-25 16:42:14,109 INFO L383 tUnfolder$Statistics]: this new event has 19 ancestors and is cut-off event [2022-11-25 16:42:14,109 INFO L386 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-11-25 16:42:14,109 INFO L386 tUnfolder$Statistics]: existing Event has 18 ancestors and is cut-off event [2022-11-25 16:42:14,110 INFO L386 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-11-25 16:42:14,126 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][51], [40#L62-4true, 17#L72-4true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), 61#L96-1true, Black: 165#(and (<= (+ (* (div thread1Thread1of1ForFork2_~i~0 4294967296) 4294967296) ~N~0) (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork2_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 46#thread2EXITtrue, 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0)]) [2022-11-25 16:42:14,127 INFO L383 tUnfolder$Statistics]: this new event has 20 ancestors and is cut-off event [2022-11-25 16:42:14,127 INFO L386 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-11-25 16:42:14,127 INFO L386 tUnfolder$Statistics]: existing Event has 20 ancestors and is cut-off event [2022-11-25 16:42:14,127 INFO L386 tUnfolder$Statistics]: existing Event has 20 ancestors and is cut-off event [2022-11-25 16:42:14,145 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][51], [40#L62-4true, 17#L72-4true, 20#L96-2true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 165#(and (<= (+ (* (div thread1Thread1of1ForFork2_~i~0 4294967296) 4294967296) ~N~0) (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork2_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0)]) [2022-11-25 16:42:14,146 INFO L383 tUnfolder$Statistics]: this new event has 21 ancestors and is cut-off event [2022-11-25 16:42:14,146 INFO L386 tUnfolder$Statistics]: existing Event has 21 ancestors and is cut-off event [2022-11-25 16:42:14,146 INFO L386 tUnfolder$Statistics]: existing Event has 21 ancestors and is cut-off event [2022-11-25 16:42:14,146 INFO L386 tUnfolder$Statistics]: existing Event has 20 ancestors and is cut-off event [2022-11-25 16:42:14,155 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][51], [40#L62-4true, 17#L72-4true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 165#(and (<= (+ (* (div thread1Thread1of1ForFork2_~i~0 4294967296) 4294967296) ~N~0) (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork2_~i~0 0) (= thread3Thread1of1ForFork1_~i~2 0)), 79#L97-1true, Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0)]) [2022-11-25 16:42:14,156 INFO L383 tUnfolder$Statistics]: this new event has 22 ancestors and is cut-off event [2022-11-25 16:42:14,156 INFO L386 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2022-11-25 16:42:14,156 INFO L386 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2022-11-25 16:42:14,156 INFO L386 tUnfolder$Statistics]: existing Event has 21 ancestors and is cut-off event [2022-11-25 16:42:14,172 INFO L130 PetriNetUnfolder]: 2537/3458 cut-off events. [2022-11-25 16:42:14,173 INFO L131 PetriNetUnfolder]: For 6281/6833 co-relation queries the response was YES. [2022-11-25 16:42:14,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11637 conditions, 3458 events. 2537/3458 cut-off events. For 6281/6833 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 15698 event pairs, 596 based on Foata normal form. 460/3762 useless extension candidates. Maximal degree in co-relation 4184. Up to 2298 conditions per place. [2022-11-25 16:42:14,198 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 54 selfloop transitions, 4 changer transitions 11/72 dead transitions. [2022-11-25 16:42:14,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 72 transitions, 424 flow [2022-11-25 16:42:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:42:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:42:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2022-11-25 16:42:14,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5235042735042735 [2022-11-25 16:42:14,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2022-11-25 16:42:14,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2022-11-25 16:42:14,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:14,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2022-11-25 16:42:14,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:14,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:14,206 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:14,206 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 149 flow. Second operand 4 states and 490 transitions. [2022-11-25 16:42:14,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 72 transitions, 424 flow [2022-11-25 16:42:14,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 72 transitions, 412 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:14,210 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 170 flow [2022-11-25 16:42:14,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2022-11-25 16:42:14,212 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2022-11-25 16:42:14,212 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 170 flow [2022-11-25 16:42:14,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:14,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:14,213 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:14,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:42:14,213 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 2 more)] === [2022-11-25 16:42:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:14,214 INFO L85 PathProgramCache]: Analyzing trace with hash -341771674, now seen corresponding path program 3 times [2022-11-25 16:42:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:14,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085526460] [2022-11-25 16:42:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:14,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:14,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:14,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085526460] [2022-11-25 16:42:14,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085526460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:14,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:14,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:14,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021736711] [2022-11-25 16:42:14,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:14,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:14,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:14,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 234 [2022-11-25 16:42:14,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:14,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:14,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 234 [2022-11-25 16:42:14,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:15,232 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][65], [Black: 173#(and (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (= |thread2Thread1of1ForFork0_~i~1#1| 0)), 17#L72-4true, 30#L51-4true, 177#true, 40#L62-4true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), 61#L96-1true, Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0)]) [2022-11-25 16:42:15,233 INFO L383 tUnfolder$Statistics]: this new event has 20 ancestors and is cut-off event [2022-11-25 16:42:15,233 INFO L386 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-11-25 16:42:15,233 INFO L386 tUnfolder$Statistics]: existing Event has 19 ancestors and is cut-off event [2022-11-25 16:42:15,233 INFO L386 tUnfolder$Statistics]: existing Event has 20 ancestors and is cut-off event [2022-11-25 16:42:15,258 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][65], [Black: 173#(and (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (= |thread2Thread1of1ForFork0_~i~1#1| 0)), 177#true, 17#L72-4true, 40#L62-4true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), 61#L96-1true, Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), 46#thread2EXITtrue, Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0)]) [2022-11-25 16:42:15,258 INFO L383 tUnfolder$Statistics]: this new event has 21 ancestors and is cut-off event [2022-11-25 16:42:15,258 INFO L386 tUnfolder$Statistics]: existing Event has 21 ancestors and is cut-off event [2022-11-25 16:42:15,259 INFO L386 tUnfolder$Statistics]: existing Event has 20 ancestors and is cut-off event [2022-11-25 16:42:15,259 INFO L386 tUnfolder$Statistics]: existing Event has 20 ancestors and is cut-off event [2022-11-25 16:42:15,282 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][65], [Black: 173#(and (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (= |thread2Thread1of1ForFork0_~i~1#1| 0)), 17#L72-4true, 177#true, 40#L62-4true, 20#L96-2true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0)]) [2022-11-25 16:42:15,282 INFO L383 tUnfolder$Statistics]: this new event has 22 ancestors and is cut-off event [2022-11-25 16:42:15,283 INFO L386 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2022-11-25 16:42:15,283 INFO L386 tUnfolder$Statistics]: existing Event has 21 ancestors and is cut-off event [2022-11-25 16:42:15,283 INFO L386 tUnfolder$Statistics]: existing Event has 21 ancestors and is cut-off event [2022-11-25 16:42:15,296 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L72-4-->L72-4: Formula: (and (< (mod |v_thread4Thread1of1ForFork3_~i~3#1_34| 4294967296) (mod v_~N~0_59 4294967296)) (= (+ v_~c~0_52 v_~counter~0_111) v_~counter~0_112) (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= (ite (< 0 (mod v_~counter~0_112 4294967296)) 1 0) |v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|) (= |v_thread4Thread1of1ForFork3_~i~3#1_33| (+ |v_thread4Thread1of1ForFork3_~i~3#1_34| 1)) (not (= |v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15| 0))) InVars {thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_34|, ~counter~0=v_~counter~0_112, ~c~0=v_~c~0_52, ~N~0=v_~N~0_59} OutVars{thread4Thread1of1ForFork3_~i~3#1=|v_thread4Thread1of1ForFork3_~i~3#1_33|, ~counter~0=v_~counter~0_111, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1_15|, ~c~0=v_~c~0_52, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1_15|, ~N~0=v_~N~0_59, thread4Thread1of1ForFork3_#t~post4#1=|v_thread4Thread1of1ForFork3_#t~post4#1_17|} AuxVars[] AssignedVars[thread4Thread1of1ForFork3_~i~3#1, ~counter~0, thread4Thread1of1ForFork3_assume_abort_if_not_~cond#1, thread4Thread1of1ForFork3_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork3_#t~post4#1][65], [Black: 173#(and (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (= |thread2Thread1of1ForFork0_~i~1#1| 0)), 177#true, 40#L62-4true, 17#L72-4true, 172#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), 79#L97-1true, Black: 163#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread3Thread1of1ForFork1_~i~2 0)), Black: 146#(= thread1Thread1of1ForFork2_~i~0 0), 159#(= thread3Thread1of1ForFork1_~i~2 0), Black: 150#(and (<= 0 (+ (div (- ~N~0) 4294967296) (div ~N~0 4294967296))) (= thread1Thread1of1ForFork2_~i~0 0)), Black: 141#(= ~counter~0 0)]) [2022-11-25 16:42:15,296 INFO L383 tUnfolder$Statistics]: this new event has 23 ancestors and is cut-off event [2022-11-25 16:42:15,296 INFO L386 tUnfolder$Statistics]: existing Event has 23 ancestors and is cut-off event [2022-11-25 16:42:15,296 INFO L386 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2022-11-25 16:42:15,296 INFO L386 tUnfolder$Statistics]: existing Event has 22 ancestors and is cut-off event [2022-11-25 16:42:15,325 INFO L130 PetriNetUnfolder]: 3495/4961 cut-off events. [2022-11-25 16:42:15,325 INFO L131 PetriNetUnfolder]: For 11476/12019 co-relation queries the response was YES. [2022-11-25 16:42:15,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16914 conditions, 4961 events. 3495/4961 cut-off events. For 11476/12019 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25448 event pairs, 1133 based on Foata normal form. 541/5355 useless extension candidates. Maximal degree in co-relation 4588. Up to 2440 conditions per place. [2022-11-25 16:42:15,381 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 84 selfloop transitions, 6 changer transitions 3/95 dead transitions. [2022-11-25 16:42:15,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 95 transitions, 581 flow [2022-11-25 16:42:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 607 transitions. [2022-11-25 16:42:15,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5188034188034188 [2022-11-25 16:42:15,385 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 607 transitions. [2022-11-25 16:42:15,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 607 transitions. [2022-11-25 16:42:15,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:15,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 607 transitions. [2022-11-25 16:42:15,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:15,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:15,392 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:15,392 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 170 flow. Second operand 5 states and 607 transitions. [2022-11-25 16:42:15,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 95 transitions, 581 flow [2022-11-25 16:42:15,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 95 transitions, 575 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:15,402 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 236 flow [2022-11-25 16:42:15,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2022-11-25 16:42:15,406 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2022-11-25 16:42:15,406 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 236 flow [2022-11-25 16:42:15,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:15,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:15,407 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:15,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:42:15,407 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 2 more)] === [2022-11-25 16:42:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:15,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1841641350, now seen corresponding path program 2 times [2022-11-25 16:42:15,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:15,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508436610] [2022-11-25 16:42:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:15,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:15,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508436610] [2022-11-25 16:42:15,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508436610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:15,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:15,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:42:15,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322393442] [2022-11-25 16:42:15,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:15,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:42:15,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2022-11-25 16:42:15,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:15,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:15,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2022-11-25 16:42:15,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:16,445 INFO L130 PetriNetUnfolder]: 3914/5742 cut-off events. [2022-11-25 16:42:16,446 INFO L131 PetriNetUnfolder]: For 31181/32910 co-relation queries the response was YES. [2022-11-25 16:42:16,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22215 conditions, 5742 events. 3914/5742 cut-off events. For 31181/32910 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 31254 event pairs, 1701 based on Foata normal form. 1435/6943 useless extension candidates. Maximal degree in co-relation 10248. Up to 3608 conditions per place. [2022-11-25 16:42:16,495 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 71 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2022-11-25 16:42:16,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 607 flow [2022-11-25 16:42:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:42:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:42:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2022-11-25 16:42:16,498 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5170940170940171 [2022-11-25 16:42:16,498 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2022-11-25 16:42:16,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2022-11-25 16:42:16,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:16,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2022-11-25 16:42:16,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:16,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:16,503 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:16,503 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 236 flow. Second operand 4 states and 484 transitions. [2022-11-25 16:42:16,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 607 flow [2022-11-25 16:42:16,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 587 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:16,512 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 272 flow [2022-11-25 16:42:16,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2022-11-25 16:42:16,516 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2022-11-25 16:42:16,516 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 272 flow [2022-11-25 16:42:16,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:16,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:16,517 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:16,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:42:16,518 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 2 more)] === [2022-11-25 16:42:16,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:16,519 INFO L85 PathProgramCache]: Analyzing trace with hash -23876640, now seen corresponding path program 3 times [2022-11-25 16:42:16,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:16,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447107607] [2022-11-25 16:42:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:16,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:16,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:16,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447107607] [2022-11-25 16:42:16,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447107607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:16,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:16,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:42:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759763434] [2022-11-25 16:42:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:42:16,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2022-11-25 16:42:16,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:16,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:16,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2022-11-25 16:42:16,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:17,552 INFO L130 PetriNetUnfolder]: 3241/4812 cut-off events. [2022-11-25 16:42:17,552 INFO L131 PetriNetUnfolder]: For 26567/28031 co-relation queries the response was YES. [2022-11-25 16:42:17,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20898 conditions, 4812 events. 3241/4812 cut-off events. For 26567/28031 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25903 event pairs, 1681 based on Foata normal form. 1408/6099 useless extension candidates. Maximal degree in co-relation 7351. Up to 3866 conditions per place. [2022-11-25 16:42:17,598 INFO L137 encePairwiseOnDemand]: 230/234 looper letters, 54 selfloop transitions, 4 changer transitions 15/77 dead transitions. [2022-11-25 16:42:17,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 621 flow [2022-11-25 16:42:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:42:17,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:42:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2022-11-25 16:42:17,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2022-11-25 16:42:17,601 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2022-11-25 16:42:17,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2022-11-25 16:42:17,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:17,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2022-11-25 16:42:17,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:17,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:17,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:17,606 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 272 flow. Second operand 4 states and 486 transitions. [2022-11-25 16:42:17,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 621 flow [2022-11-25 16:42:17,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 614 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:17,617 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 296 flow [2022-11-25 16:42:17,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2022-11-25 16:42:17,619 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2022-11-25 16:42:17,619 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 296 flow [2022-11-25 16:42:17,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:17,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:17,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:42:17,620 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 2 more)] === [2022-11-25 16:42:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1979220476, now seen corresponding path program 4 times [2022-11-25 16:42:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095108779] [2022-11-25 16:42:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:17,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:17,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095108779] [2022-11-25 16:42:17,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095108779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:17,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:17,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:42:17,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383136402] [2022-11-25 16:42:17,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:17,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:17,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:42:17,860 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2022-11-25 16:42:17,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:17,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:17,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2022-11-25 16:42:17,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:18,823 INFO L130 PetriNetUnfolder]: 4131/5786 cut-off events. [2022-11-25 16:42:18,824 INFO L131 PetriNetUnfolder]: For 43538/45325 co-relation queries the response was YES. [2022-11-25 16:42:18,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27407 conditions, 5786 events. 4131/5786 cut-off events. For 43538/45325 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29670 event pairs, 1648 based on Foata normal form. 1267/6691 useless extension candidates. Maximal degree in co-relation 19829. Up to 3300 conditions per place. [2022-11-25 16:42:18,871 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 61 selfloop transitions, 14 changer transitions 12/91 dead transitions. [2022-11-25 16:42:18,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 91 transitions, 805 flow [2022-11-25 16:42:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:42:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:42:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2022-11-25 16:42:18,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5224358974358975 [2022-11-25 16:42:18,875 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2022-11-25 16:42:18,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2022-11-25 16:42:18,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:18,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2022-11-25 16:42:18,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:18,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:18,880 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:18,881 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 296 flow. Second operand 4 states and 489 transitions. [2022-11-25 16:42:18,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 91 transitions, 805 flow [2022-11-25 16:42:18,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 763 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:18,897 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 450 flow [2022-11-25 16:42:18,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=450, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2022-11-25 16:42:18,900 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2022-11-25 16:42:18,900 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 450 flow [2022-11-25 16:42:18,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:18,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:18,901 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:18,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 16:42:18,902 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 2 more)] === [2022-11-25 16:42:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:18,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1619570056, now seen corresponding path program 1 times [2022-11-25 16:42:18,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:18,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220967967] [2022-11-25 16:42:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:18,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:19,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220967967] [2022-11-25 16:42:19,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220967967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:19,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:19,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:19,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158001349] [2022-11-25 16:42:19,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:19,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:19,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:19,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:19,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 234 [2022-11-25 16:42:19,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 450 flow. Second operand has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:19,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:19,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 234 [2022-11-25 16:42:19,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:20,112 INFO L130 PetriNetUnfolder]: 3895/5455 cut-off events. [2022-11-25 16:42:20,112 INFO L131 PetriNetUnfolder]: For 44932/45915 co-relation queries the response was YES. [2022-11-25 16:42:20,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27587 conditions, 5455 events. 3895/5455 cut-off events. For 44932/45915 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27225 event pairs, 1611 based on Foata normal form. 944/6272 useless extension candidates. Maximal degree in co-relation 20915. Up to 3861 conditions per place. [2022-11-25 16:42:20,158 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 90 selfloop transitions, 12 changer transitions 7/112 dead transitions. [2022-11-25 16:42:20,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 112 transitions, 1198 flow [2022-11-25 16:42:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 593 transitions. [2022-11-25 16:42:20,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5068376068376068 [2022-11-25 16:42:20,162 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 593 transitions. [2022-11-25 16:42:20,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 593 transitions. [2022-11-25 16:42:20,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:20,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 593 transitions. [2022-11-25 16:42:20,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:20,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:20,168 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:20,168 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 450 flow. Second operand 5 states and 593 transitions. [2022-11-25 16:42:20,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 112 transitions, 1198 flow [2022-11-25 16:42:20,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 112 transitions, 1172 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:20,184 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 592 flow [2022-11-25 16:42:20,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=592, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-11-25 16:42:20,185 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2022-11-25 16:42:20,185 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 592 flow [2022-11-25 16:42:20,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:20,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:20,186 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:20,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:42:20,187 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 2 more)] === [2022-11-25 16:42:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1500908928, now seen corresponding path program 2 times [2022-11-25 16:42:20,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674486770] [2022-11-25 16:42:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:20,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:20,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:20,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674486770] [2022-11-25 16:42:20,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674486770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:20,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:20,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:20,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805596890] [2022-11-25 16:42:20,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:20,421 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 234 [2022-11-25 16:42:20,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:20,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:20,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 234 [2022-11-25 16:42:20,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:21,207 INFO L130 PetriNetUnfolder]: 3935/5410 cut-off events. [2022-11-25 16:42:21,207 INFO L131 PetriNetUnfolder]: For 44419/45381 co-relation queries the response was YES. [2022-11-25 16:42:21,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29004 conditions, 5410 events. 3935/5410 cut-off events. For 44419/45381 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 25383 event pairs, 1631 based on Foata normal form. 956/6286 useless extension candidates. Maximal degree in co-relation 25001. Up to 3713 conditions per place. [2022-11-25 16:42:21,271 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 69 selfloop transitions, 32 changer transitions 11/115 dead transitions. [2022-11-25 16:42:21,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 1307 flow [2022-11-25 16:42:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2022-11-25 16:42:21,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5051282051282051 [2022-11-25 16:42:21,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2022-11-25 16:42:21,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2022-11-25 16:42:21,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:21,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2022-11-25 16:42:21,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:21,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:21,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:21,284 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 592 flow. Second operand 5 states and 591 transitions. [2022-11-25 16:42:21,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 1307 flow [2022-11-25 16:42:21,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 1285 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:21,312 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 927 flow [2022-11-25 16:42:21,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=927, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2022-11-25 16:42:21,313 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2022-11-25 16:42:21,314 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 927 flow [2022-11-25 16:42:21,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:21,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:21,315 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:42:21,315 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 2 more)] === [2022-11-25 16:42:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1177664854, now seen corresponding path program 1 times [2022-11-25 16:42:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750920379] [2022-11-25 16:42:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:21,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:21,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:21,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750920379] [2022-11-25 16:42:21,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750920379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:21,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336896612] [2022-11-25 16:42:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:21,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:21,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:21,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:21,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:42:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:21,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:21,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:21,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336896612] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:21,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:42:21,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2022-11-25 16:42:21,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084201217] [2022-11-25 16:42:21,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:21,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:21,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:42:21,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2022-11-25 16:42:21,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 927 flow. Second operand has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:21,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:21,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2022-11-25 16:42:21,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:22,727 INFO L130 PetriNetUnfolder]: 4137/5621 cut-off events. [2022-11-25 16:42:22,738 INFO L131 PetriNetUnfolder]: For 61537/63353 co-relation queries the response was YES. [2022-11-25 16:42:22,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33276 conditions, 5621 events. 4137/5621 cut-off events. For 61537/63353 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 26140 event pairs, 1139 based on Foata normal form. 1197/6772 useless extension candidates. Maximal degree in co-relation 29562. Up to 4832 conditions per place. [2022-11-25 16:42:22,872 INFO L137 encePairwiseOnDemand]: 230/234 looper letters, 84 selfloop transitions, 15 changer transitions 3/108 dead transitions. [2022-11-25 16:42:22,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 108 transitions, 1386 flow [2022-11-25 16:42:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:42:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:42:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2022-11-25 16:42:22,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2022-11-25 16:42:22,876 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2022-11-25 16:42:22,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2022-11-25 16:42:22,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:22,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2022-11-25 16:42:22,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:22,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:22,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:22,884 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 927 flow. Second operand 4 states and 481 transitions. [2022-11-25 16:42:22,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 108 transitions, 1386 flow [2022-11-25 16:42:22,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 1290 flow, removed 31 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:22,928 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 926 flow [2022-11-25 16:42:22,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=926, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2022-11-25 16:42:22,930 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2022-11-25 16:42:22,930 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 926 flow [2022-11-25 16:42:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:22,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:22,931 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:22,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 16:42:23,138 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 2 more)] === [2022-11-25 16:42:23,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1263459480, now seen corresponding path program 2 times [2022-11-25 16:42:23,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:23,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042301367] [2022-11-25 16:42:23,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:23,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:23,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042301367] [2022-11-25 16:42:23,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042301367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027526519] [2022-11-25 16:42:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:23,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:23,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:23,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:23,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:42:23,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:23,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:23,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:23,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:23,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027526519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:23,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:23,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-25 16:42:23,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128123906] [2022-11-25 16:42:23,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:23,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:42:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:42:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:42:23,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-11-25 16:42:23,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 926 flow. Second operand has 7 states, 7 states have (on average 109.57142857142857) internal successors, (767), 7 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:23,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:23,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-11-25 16:42:23,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:25,067 INFO L130 PetriNetUnfolder]: 5227/7094 cut-off events. [2022-11-25 16:42:25,067 INFO L131 PetriNetUnfolder]: For 77725/79059 co-relation queries the response was YES. [2022-11-25 16:42:25,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42149 conditions, 7094 events. 5227/7094 cut-off events. For 77725/79059 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 34308 event pairs, 1575 based on Foata normal form. 1280/8304 useless extension candidates. Maximal degree in co-relation 38625. Up to 3947 conditions per place. [2022-11-25 16:42:25,129 INFO L137 encePairwiseOnDemand]: 229/234 looper letters, 130 selfloop transitions, 32 changer transitions 8/173 dead transitions. [2022-11-25 16:42:25,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 173 transitions, 2125 flow [2022-11-25 16:42:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:42:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 16:42:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 822 transitions. [2022-11-25 16:42:25,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5018315018315018 [2022-11-25 16:42:25,134 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 822 transitions. [2022-11-25 16:42:25,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 822 transitions. [2022-11-25 16:42:25,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:25,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 822 transitions. [2022-11-25 16:42:25,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 117.42857142857143) internal successors, (822), 7 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:25,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:25,146 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:25,146 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 926 flow. Second operand 7 states and 822 transitions. [2022-11-25 16:42:25,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 173 transitions, 2125 flow [2022-11-25 16:42:25,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 173 transitions, 2113 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:25,194 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 1100 flow [2022-11-25 16:42:25,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1100, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2022-11-25 16:42:25,195 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 40 predicate places. [2022-11-25 16:42:25,195 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 1100 flow [2022-11-25 16:42:25,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.57142857142857) internal successors, (767), 7 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:25,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:25,196 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:25,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:25,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 16:42:25,403 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 2 more)] === [2022-11-25 16:42:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:25,403 INFO L85 PathProgramCache]: Analyzing trace with hash -801172438, now seen corresponding path program 3 times [2022-11-25 16:42:25,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:25,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932690965] [2022-11-25 16:42:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:25,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:25,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:25,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932690965] [2022-11-25 16:42:25,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932690965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:25,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609944726] [2022-11-25 16:42:25,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:25,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:25,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:25,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:25,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:42:25,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:42:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:25,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:25,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609944726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:25,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:25,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 16:42:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852166119] [2022-11-25 16:42:25,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:25,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:42:25,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:42:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:42:26,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2022-11-25 16:42:26,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 1100 flow. Second operand has 11 states, 11 states have (on average 105.54545454545455) internal successors, (1161), 11 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:26,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:26,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2022-11-25 16:42:26,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:27,926 INFO L130 PetriNetUnfolder]: 7381/9781 cut-off events. [2022-11-25 16:42:27,926 INFO L131 PetriNetUnfolder]: For 114868/115605 co-relation queries the response was YES. [2022-11-25 16:42:27,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63173 conditions, 9781 events. 7381/9781 cut-off events. For 114868/115605 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 44631 event pairs, 1102 based on Foata normal form. 1170/10941 useless extension candidates. Maximal degree in co-relation 57685. Up to 5215 conditions per place. [2022-11-25 16:42:27,994 INFO L137 encePairwiseOnDemand]: 226/234 looper letters, 154 selfloop transitions, 63 changer transitions 8/227 dead transitions. [2022-11-25 16:42:27,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 227 transitions, 2949 flow [2022-11-25 16:42:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:42:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:42:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1242 transitions. [2022-11-25 16:42:28,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2022-11-25 16:42:28,009 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1242 transitions. [2022-11-25 16:42:28,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1242 transitions. [2022-11-25 16:42:28,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:28,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1242 transitions. [2022-11-25 16:42:28,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 112.9090909090909) internal successors, (1242), 11 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:28,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:28,023 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:28,024 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 1100 flow. Second operand 11 states and 1242 transitions. [2022-11-25 16:42:28,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 227 transitions, 2949 flow [2022-11-25 16:42:28,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 227 transitions, 2900 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 16:42:28,115 INFO L231 Difference]: Finished difference. Result has 91 places, 112 transitions, 1741 flow [2022-11-25 16:42:28,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1741, PETRI_PLACES=91, PETRI_TRANSITIONS=112} [2022-11-25 16:42:28,117 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2022-11-25 16:42:28,117 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 112 transitions, 1741 flow [2022-11-25 16:42:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.54545454545455) internal successors, (1161), 11 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:28,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:28,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:28,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:28,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:28,324 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 2 more)] === [2022-11-25 16:42:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2127136853, now seen corresponding path program 1 times [2022-11-25 16:42:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:28,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858525577] [2022-11-25 16:42:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:28,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858525577] [2022-11-25 16:42:28,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858525577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398029719] [2022-11-25 16:42:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:28,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:28,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:28,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:28,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:42:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:28,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:28,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398029719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:28,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 16:42:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135600514] [2022-11-25 16:42:28,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:42:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:42:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:42:28,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2022-11-25 16:42:28,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 112 transitions, 1741 flow. Second operand has 8 states, 8 states have (on average 108.375) internal successors, (867), 8 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:28,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:28,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2022-11-25 16:42:28,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:30,310 INFO L130 PetriNetUnfolder]: 8339/10728 cut-off events. [2022-11-25 16:42:30,310 INFO L131 PetriNetUnfolder]: For 202379/204548 co-relation queries the response was YES. [2022-11-25 16:42:30,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81199 conditions, 10728 events. 8339/10728 cut-off events. For 202379/204548 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 46170 event pairs, 1769 based on Foata normal form. 1433/12000 useless extension candidates. Maximal degree in co-relation 70715. Up to 6721 conditions per place. [2022-11-25 16:42:30,412 INFO L137 encePairwiseOnDemand]: 227/234 looper letters, 146 selfloop transitions, 109 changer transitions 2/263 dead transitions. [2022-11-25 16:42:30,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 263 transitions, 4682 flow [2022-11-25 16:42:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:42:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:42:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 699 transitions. [2022-11-25 16:42:30,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49786324786324787 [2022-11-25 16:42:30,416 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 699 transitions. [2022-11-25 16:42:30,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 699 transitions. [2022-11-25 16:42:30,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:30,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 699 transitions. [2022-11-25 16:42:30,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:30,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:30,423 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:30,423 INFO L175 Difference]: Start difference. First operand has 91 places, 112 transitions, 1741 flow. Second operand 6 states and 699 transitions. [2022-11-25 16:42:30,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 263 transitions, 4682 flow [2022-11-25 16:42:30,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 263 transitions, 3723 flow, removed 207 selfloop flow, removed 11 redundant places. [2022-11-25 16:42:30,811 INFO L231 Difference]: Finished difference. Result has 88 places, 201 transitions, 3147 flow [2022-11-25 16:42:30,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3147, PETRI_PLACES=88, PETRI_TRANSITIONS=201} [2022-11-25 16:42:30,812 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2022-11-25 16:42:30,812 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 201 transitions, 3147 flow [2022-11-25 16:42:30,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.375) internal successors, (867), 8 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:30,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:30,813 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:30,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 16:42:31,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 16:42:31,019 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 2 more)] === [2022-11-25 16:42:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:31,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1694010954, now seen corresponding path program 1 times [2022-11-25 16:42:31,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:31,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965631531] [2022-11-25 16:42:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:31,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:31,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965631531] [2022-11-25 16:42:31,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965631531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133377165] [2022-11-25 16:42:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:31,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:31,316 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:31,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:42:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:31,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 16:42:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:31,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:31,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133377165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:31,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:31,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-11-25 16:42:31,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446122794] [2022-11-25 16:42:31,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:31,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:42:31,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:42:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:42:31,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 234 [2022-11-25 16:42:31,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 201 transitions, 3147 flow. Second operand has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:31,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:31,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 234 [2022-11-25 16:42:31,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:34,878 INFO L130 PetriNetUnfolder]: 15523/20290 cut-off events. [2022-11-25 16:42:34,878 INFO L131 PetriNetUnfolder]: For 397062/404628 co-relation queries the response was YES. [2022-11-25 16:42:34,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149437 conditions, 20290 events. 15523/20290 cut-off events. For 397062/404628 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 101344 event pairs, 1721 based on Foata normal form. 3902/22675 useless extension candidates. Maximal degree in co-relation 133707. Up to 13010 conditions per place. [2022-11-25 16:42:35,064 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 182 selfloop transitions, 194 changer transitions 3/397 dead transitions. [2022-11-25 16:42:35,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 397 transitions, 6798 flow [2022-11-25 16:42:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:42:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:42:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2022-11-25 16:42:35,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5502136752136753 [2022-11-25 16:42:35,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2022-11-25 16:42:35,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2022-11-25 16:42:35,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:35,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2022-11-25 16:42:35,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:35,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:35,073 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:35,074 INFO L175 Difference]: Start difference. First operand has 88 places, 201 transitions, 3147 flow. Second operand 4 states and 515 transitions. [2022-11-25 16:42:35,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 397 transitions, 6798 flow [2022-11-25 16:42:36,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 397 transitions, 6481 flow, removed 133 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:36,719 INFO L231 Difference]: Finished difference. Result has 90 places, 360 transitions, 6602 flow [2022-11-25 16:42:36,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6602, PETRI_PLACES=90, PETRI_TRANSITIONS=360} [2022-11-25 16:42:36,720 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2022-11-25 16:42:36,720 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 360 transitions, 6602 flow [2022-11-25 16:42:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:36,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:36,721 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:36,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:36,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 16:42:36,925 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 2 more)] === [2022-11-25 16:42:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1227491036, now seen corresponding path program 2 times [2022-11-25 16:42:36,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:36,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736983561] [2022-11-25 16:42:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:36,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:37,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:37,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736983561] [2022-11-25 16:42:37,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736983561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:37,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033866044] [2022-11-25 16:42:37,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:37,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:37,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:37,230 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:37,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:42:37,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:37,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 16:42:37,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:37,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:37,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033866044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:37,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:37,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-11-25 16:42:37,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327425658] [2022-11-25 16:42:37,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:37,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:42:37,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:42:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:42:37,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 234 [2022-11-25 16:42:37,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 360 transitions, 6602 flow. Second operand has 9 states, 9 states have (on average 117.66666666666667) internal successors, (1059), 9 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:37,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:37,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 234 [2022-11-25 16:42:37,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:44,262 INFO L130 PetriNetUnfolder]: 29678/38908 cut-off events. [2022-11-25 16:42:44,262 INFO L131 PetriNetUnfolder]: For 924702/937787 co-relation queries the response was YES. [2022-11-25 16:42:44,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316382 conditions, 38908 events. 29678/38908 cut-off events. For 924702/937787 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 213637 event pairs, 2708 based on Foata normal form. 6032/42413 useless extension candidates. Maximal degree in co-relation 283792. Up to 24666 conditions per place. [2022-11-25 16:42:44,621 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 201 selfloop transitions, 452 changer transitions 3/674 dead transitions. [2022-11-25 16:42:44,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 674 transitions, 12996 flow [2022-11-25 16:42:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2022-11-25 16:42:44,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5547008547008547 [2022-11-25 16:42:44,625 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2022-11-25 16:42:44,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2022-11-25 16:42:44,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:44,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2022-11-25 16:42:44,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:44,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:44,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:44,632 INFO L175 Difference]: Start difference. First operand has 90 places, 360 transitions, 6602 flow. Second operand 5 states and 649 transitions. [2022-11-25 16:42:44,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 674 transitions, 12996 flow [2022-11-25 16:42:48,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 674 transitions, 12780 flow, removed 108 selfloop flow, removed 0 redundant places. [2022-11-25 16:42:48,451 INFO L231 Difference]: Finished difference. Result has 96 places, 618 transitions, 12921 flow [2022-11-25 16:42:48,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=6386, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12921, PETRI_PLACES=96, PETRI_TRANSITIONS=618} [2022-11-25 16:42:48,452 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2022-11-25 16:42:48,452 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 618 transitions, 12921 flow [2022-11-25 16:42:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 117.66666666666667) internal successors, (1059), 9 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:48,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:48,453 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:48,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:48,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 16:42:48,654 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 2 more)] === [2022-11-25 16:42:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2099844891, now seen corresponding path program 3 times [2022-11-25 16:42:48,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:48,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516073740] [2022-11-25 16:42:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:48,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:48,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516073740] [2022-11-25 16:42:48,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516073740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974830329] [2022-11-25 16:42:48,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:48,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:48,918 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:48,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:42:49,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:42:49,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:49,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 16:42:49,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:49,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974830329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:49,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:49,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-25 16:42:49,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985312307] [2022-11-25 16:42:49,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:49,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 16:42:49,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:49,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 16:42:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:42:49,524 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2022-11-25 16:42:49,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 618 transitions, 12921 flow. Second operand has 14 states, 14 states have (on average 105.78571428571429) internal successors, (1481), 14 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:49,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:49,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2022-11-25 16:42:49,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:18,183 INFO L130 PetriNetUnfolder]: 86797/118489 cut-off events. [2022-11-25 16:43:18,183 INFO L131 PetriNetUnfolder]: For 2320116/2331800 co-relation queries the response was YES. [2022-11-25 16:43:18,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915032 conditions, 118489 events. 86797/118489 cut-off events. For 2320116/2331800 co-relation queries the response was YES. Maximal size of possible extension queue 4549. Compared 793749 event pairs, 3357 based on Foata normal form. 7018/124655 useless extension candidates. Maximal degree in co-relation 872425. Up to 49187 conditions per place. [2022-11-25 16:43:19,335 INFO L137 encePairwiseOnDemand]: 225/234 looper letters, 2726 selfloop transitions, 912 changer transitions 0/3642 dead transitions. [2022-11-25 16:43:19,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 3642 transitions, 79399 flow [2022-11-25 16:43:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 16:43:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-25 16:43:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5355 transitions. [2022-11-25 16:43:19,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4869067103109656 [2022-11-25 16:43:19,349 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5355 transitions. [2022-11-25 16:43:19,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5355 transitions. [2022-11-25 16:43:19,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:19,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5355 transitions. [2022-11-25 16:43:19,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 113.93617021276596) internal successors, (5355), 47 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:19,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 234.0) internal successors, (11232), 48 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:19,383 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 234.0) internal successors, (11232), 48 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:19,383 INFO L175 Difference]: Start difference. First operand has 96 places, 618 transitions, 12921 flow. Second operand 47 states and 5355 transitions. [2022-11-25 16:43:19,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 3642 transitions, 79399 flow [2022-11-25 16:44:03,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 3642 transitions, 75049 flow, removed 2175 selfloop flow, removed 0 redundant places. [2022-11-25 16:44:03,987 INFO L231 Difference]: Finished difference. Result has 176 places, 1502 transitions, 33031 flow [2022-11-25 16:44:03,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=12189, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=33031, PETRI_PLACES=176, PETRI_TRANSITIONS=1502} [2022-11-25 16:44:03,988 INFO L288 CegarLoopForPetriNet]: 38 programPoint places, 138 predicate places. [2022-11-25 16:44:03,988 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 1502 transitions, 33031 flow [2022-11-25 16:44:03,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 105.78571428571429) internal successors, (1481), 14 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:03,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:03,989 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:03,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:04,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 16:44:04,194 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 2 more)] === [2022-11-25 16:44:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:04,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1153363877, now seen corresponding path program 4 times [2022-11-25 16:44:04,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:04,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933186578] [2022-11-25 16:44:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:04,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:44:04,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:04,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933186578] [2022-11-25 16:44:04,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933186578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:04,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601977971] [2022-11-25 16:44:04,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:44:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:04,467 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:04,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd58abee-d2f8-4f40-9260-811a4223accd/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:44:04,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:44:04,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:44:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 16:44:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:44:04,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:44:04,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601977971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:04,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:04,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-11-25 16:44:04,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273021979] [2022-11-25 16:44:04,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:04,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 16:44:04,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:04,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 16:44:04,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-25 16:44:05,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 234 [2022-11-25 16:44:05,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 1502 transitions, 33031 flow. Second operand has 16 states, 16 states have (on average 106.0625) internal successors, (1697), 16 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:05,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:05,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 234 [2022-11-25 16:44:05,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand