./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 21:23:38,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:23:38,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:23:38,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:23:38,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:23:38,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:23:38,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:23:38,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:23:38,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:23:38,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:23:38,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:23:38,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:23:38,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:23:38,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:23:38,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:23:38,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:23:38,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:23:38,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:23:38,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:23:38,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:23:38,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:23:38,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:23:38,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:23:38,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:23:38,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:23:38,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:23:38,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:23:38,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:23:38,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:23:38,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:23:38,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:23:38,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:23:38,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:23:38,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:23:38,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:23:38,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:23:38,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:23:38,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:23:38,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:23:38,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:23:38,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:23:38,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:23:38,809 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:23:38,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:23:38,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:23:38,810 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:23:38,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:23:38,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:23:38,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:23:38,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:23:38,811 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:23:38,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:23:38,816 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:23:38,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:23:38,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:23:38,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:23:38,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:23:38,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:23:38,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:23:38,817 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:23:38,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:23:38,818 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:23:38,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:23:38,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:23:38,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:23:38,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:23:38,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:23:38,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:23:38,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:23:38,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:23:38,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:23:38,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:23:38,820 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:23:38,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:23:38,820 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:23:38,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:23:38,820 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:23:38,820 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_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 [2022-12-13 21:23:39,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:23:39,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:23:39,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:23:39,031 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:23:39,031 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:23:39,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2022-12-13 21:23:41,706 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:23:41,868 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:23:41,868 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2022-12-13 21:23:41,873 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/data/7f2f5caea/ae67dbdee7d247f095e384cc93460ca1/FLAG9a31531e0 [2022-12-13 21:23:41,882 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/data/7f2f5caea/ae67dbdee7d247f095e384cc93460ca1 [2022-12-13 21:23:41,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:23:41,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:23:41,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:23:41,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:23:41,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:23:41,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:23:41" (1/1) ... [2022-12-13 21:23:41,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48721171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:41, skipping insertion in model container [2022-12-13 21:23:41,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:23:41" (1/1) ... [2022-12-13 21:23:41,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:23:41,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:23:42,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,020 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,020 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,021 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,021 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,032 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_d8031f88-da43-42f4-8c98-af950f7c969e/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-12-13 21:23:42,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:23:42,042 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:23:42,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,055 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,055 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,055 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,055 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,056 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,056 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,056 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 21:23:42,057 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 21:23:42,060 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_d8031f88-da43-42f4-8c98-af950f7c969e/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-12-13 21:23:42,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:23:42,070 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:23:42,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42 WrapperNode [2022-12-13 21:23:42,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:23:42,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:23:42,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:23:42,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:23:42,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,094 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-12-13 21:23:42,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:23:42,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:23:42,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:23:42,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:23:42,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,110 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:23:42,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:23:42,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:23:42,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:23:42,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (1/1) ... [2022-12-13 21:23:42,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:23:42,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:42,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:23:42,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:23:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:23:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 21:23:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 21:23:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 21:23:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 21:23:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 21:23:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 21:23:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:23:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:23:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:23:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 21:23:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 21:23:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:23:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:23:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:23:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:23:42,172 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 21:23:42,247 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:23:42,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:23:42,391 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:23:42,420 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:23:42,420 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 21:23:42,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:23:42 BoogieIcfgContainer [2022-12-13 21:23:42,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:23:42,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:23:42,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:23:42,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:23:42,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:23:41" (1/3) ... [2022-12-13 21:23:42,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131affbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:23:42, skipping insertion in model container [2022-12-13 21:23:42,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:23:42" (2/3) ... [2022-12-13 21:23:42,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131affbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:23:42, skipping insertion in model container [2022-12-13 21:23:42,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:23:42" (3/3) ... [2022-12-13 21:23:42,436 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2022-12-13 21:23:42,443 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:23:42,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:23:42,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:23:42,451 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:23:42,512 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 21:23:42,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2022-12-13 21:23:42,583 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2022-12-13 21:23:42,583 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:23:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2022-12-13 21:23:42,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 234 flow [2022-12-13 21:23:42,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 91 transitions, 200 flow [2022-12-13 21:23:42,594 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:23:42,602 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 91 transitions, 200 flow [2022-12-13 21:23:42,604 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 91 transitions, 200 flow [2022-12-13 21:23:42,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 91 transitions, 200 flow [2022-12-13 21:23:42,629 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-13 21:23:42,630 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:23:42,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 7/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2022-12-13 21:23:42,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2022-12-13 21:23:44,727 INFO L134 LiptonReduction]: Checked pairs total: 1291 [2022-12-13 21:23:44,727 INFO L136 LiptonReduction]: Total number of compositions: 73 [2022-12-13 21:23:44,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:23:44,742 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;@4bf89c4b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:23:44,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 21:23:44,747 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2022-12-13 21:23:44,747 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 21:23:44,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:44,748 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:44,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash -750036798, now seen corresponding path program 1 times [2022-12-13 21:23:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:44,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217069827] [2022-12-13 21:23:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:44,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:45,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:45,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217069827] [2022-12-13 21:23:45,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217069827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:45,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:45,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:23:45,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562249189] [2022-12-13 21:23:45,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:45,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:23:45,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:23:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:23:45,213 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 178 [2022-12-13 21:23:45,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:45,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 178 [2022-12-13 21:23:45,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:45,441 INFO L130 PetriNetUnfolder]: 416/658 cut-off events. [2022-12-13 21:23:45,441 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 21:23:45,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 658 events. 416/658 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2577 event pairs, 65 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 1127. Up to 373 conditions per place. [2022-12-13 21:23:45,448 INFO L137 encePairwiseOnDemand]: 171/178 looper letters, 52 selfloop transitions, 5 changer transitions 19/77 dead transitions. [2022-12-13 21:23:45,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 360 flow [2022-12-13 21:23:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:23:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:23:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2022-12-13 21:23:45,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.528892455858748 [2022-12-13 21:23:45,460 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2022-12-13 21:23:45,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2022-12-13 21:23:45,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:45,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2022-12-13 21:23:45,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.14285714285714) internal successors, (659), 7 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,472 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,473 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 659 transitions. [2022-12-13 21:23:45,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 360 flow [2022-12-13 21:23:45,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 77 transitions, 324 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 21:23:45,478 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2022-12-13 21:23:45,479 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2022-12-13 21:23:45,481 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-12-13 21:23:45,482 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2022-12-13 21:23:45,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:45,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:45,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:23:45,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash -48628124, now seen corresponding path program 2 times [2022-12-13 21:23:45,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:45,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911425437] [2022-12-13 21:23:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:45,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:45,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911425437] [2022-12-13 21:23:45,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911425437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:45,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:45,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:23:45,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970930943] [2022-12-13 21:23:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:45,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:23:45,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:45,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:23:45,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:23:45,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 178 [2022-12-13 21:23:45,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:45,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 178 [2022-12-13 21:23:45,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:45,735 INFO L130 PetriNetUnfolder]: 268/444 cut-off events. [2022-12-13 21:23:45,736 INFO L131 PetriNetUnfolder]: For 605/621 co-relation queries the response was YES. [2022-12-13 21:23:45,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 444 events. 268/444 cut-off events. For 605/621 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1672 event pairs, 18 based on Foata normal form. 28/460 useless extension candidates. Maximal degree in co-relation 919. Up to 249 conditions per place. [2022-12-13 21:23:45,739 INFO L137 encePairwiseOnDemand]: 174/178 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2022-12-13 21:23:45,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 262 flow [2022-12-13 21:23:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:23:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:23:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2022-12-13 21:23:45,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5421348314606742 [2022-12-13 21:23:45,742 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 386 transitions. [2022-12-13 21:23:45,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 386 transitions. [2022-12-13 21:23:45,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:45,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 386 transitions. [2022-12-13 21:23:45,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,746 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,746 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 386 transitions. [2022-12-13 21:23:45,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 262 flow [2022-12-13 21:23:45,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 247 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 21:23:45,750 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2022-12-13 21:23:45,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2022-12-13 21:23:45,751 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-12-13 21:23:45,751 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2022-12-13 21:23:45,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:45,751 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:45,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:23:45,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:45,752 INFO L85 PathProgramCache]: Analyzing trace with hash 624608058, now seen corresponding path program 3 times [2022-12-13 21:23:45,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:45,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125058461] [2022-12-13 21:23:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:45,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:45,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:45,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125058461] [2022-12-13 21:23:45,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125058461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:45,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:45,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:23:45,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621395157] [2022-12-13 21:23:45,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:45,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:23:45,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:45,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:23:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:23:45,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 178 [2022-12-13 21:23:45,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:45,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:45,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 178 [2022-12-13 21:23:45,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:46,005 INFO L130 PetriNetUnfolder]: 199/353 cut-off events. [2022-12-13 21:23:46,006 INFO L131 PetriNetUnfolder]: For 413/430 co-relation queries the response was YES. [2022-12-13 21:23:46,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 353 events. 199/353 cut-off events. For 413/430 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1213 event pairs, 32 based on Foata normal form. 33/386 useless extension candidates. Maximal degree in co-relation 1025. Up to 221 conditions per place. [2022-12-13 21:23:46,009 INFO L137 encePairwiseOnDemand]: 174/178 looper letters, 33 selfloop transitions, 7 changer transitions 2/44 dead transitions. [2022-12-13 21:23:46,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 281 flow [2022-12-13 21:23:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:23:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:23:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 382 transitions. [2022-12-13 21:23:46,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5365168539325843 [2022-12-13 21:23:46,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 382 transitions. [2022-12-13 21:23:46,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 382 transitions. [2022-12-13 21:23:46,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:46,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 382 transitions. [2022-12-13 21:23:46,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,014 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,015 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 382 transitions. [2022-12-13 21:23:46,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 281 flow [2022-12-13 21:23:46,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:23:46,017 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2022-12-13 21:23:46,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2022-12-13 21:23:46,018 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2022-12-13 21:23:46,018 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2022-12-13 21:23:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:46,019 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:46,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:23:46,019 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1163725204, now seen corresponding path program 4 times [2022-12-13 21:23:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900122363] [2022-12-13 21:23:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:46,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:46,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:46,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900122363] [2022-12-13 21:23:46,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900122363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:46,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:46,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:23:46,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957396767] [2022-12-13 21:23:46,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:46,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:23:46,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:23:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:23:46,160 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 178 [2022-12-13 21:23:46,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:46,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 178 [2022-12-13 21:23:46,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:46,276 INFO L130 PetriNetUnfolder]: 209/361 cut-off events. [2022-12-13 21:23:46,277 INFO L131 PetriNetUnfolder]: For 632/657 co-relation queries the response was YES. [2022-12-13 21:23:46,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 361 events. 209/361 cut-off events. For 632/657 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1252 event pairs, 22 based on Foata normal form. 25/381 useless extension candidates. Maximal degree in co-relation 1078. Up to 146 conditions per place. [2022-12-13 21:23:46,280 INFO L137 encePairwiseOnDemand]: 172/178 looper letters, 38 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2022-12-13 21:23:46,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 338 flow [2022-12-13 21:23:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:23:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:23:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2022-12-13 21:23:46,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5292134831460674 [2022-12-13 21:23:46,282 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2022-12-13 21:23:46,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2022-12-13 21:23:46,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:46,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2022-12-13 21:23:46,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,286 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,287 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 471 transitions. [2022-12-13 21:23:46,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 338 flow [2022-12-13 21:23:46,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 328 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 21:23:46,290 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2022-12-13 21:23:46,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2022-12-13 21:23:46,291 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2022-12-13 21:23:46,291 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2022-12-13 21:23:46,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:46,292 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:46,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:23:46,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1407761690, now seen corresponding path program 5 times [2022-12-13 21:23:46,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:46,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883889776] [2022-12-13 21:23:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:46,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883889776] [2022-12-13 21:23:46,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883889776] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:46,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:46,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:23:46,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896592420] [2022-12-13 21:23:46,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:46,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:23:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:23:46,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:23:46,448 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 178 [2022-12-13 21:23:46,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:46,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 178 [2022-12-13 21:23:46,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:46,574 INFO L130 PetriNetUnfolder]: 199/330 cut-off events. [2022-12-13 21:23:46,574 INFO L131 PetriNetUnfolder]: For 980/1008 co-relation queries the response was YES. [2022-12-13 21:23:46,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 330 events. 199/330 cut-off events. For 980/1008 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1067 event pairs, 15 based on Foata normal form. 25/349 useless extension candidates. Maximal degree in co-relation 898. Up to 240 conditions per place. [2022-12-13 21:23:46,576 INFO L137 encePairwiseOnDemand]: 171/178 looper letters, 31 selfloop transitions, 3 changer transitions 18/54 dead transitions. [2022-12-13 21:23:46,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 402 flow [2022-12-13 21:23:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 21:23:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 21:23:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2022-12-13 21:23:46,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5048154093097913 [2022-12-13 21:23:46,579 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2022-12-13 21:23:46,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2022-12-13 21:23:46,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:46,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2022-12-13 21:23:46,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,584 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,584 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 7 states and 629 transitions. [2022-12-13 21:23:46,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 402 flow [2022-12-13 21:23:46,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:23:46,587 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 168 flow [2022-12-13 21:23:46,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2022-12-13 21:23:46,588 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2022-12-13 21:23:46,588 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 168 flow [2022-12-13 21:23:46,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:46,589 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:46,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 21:23:46,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash 993638593, now seen corresponding path program 1 times [2022-12-13 21:23:46,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:46,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205312945] [2022-12-13 21:23:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:46,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:46,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:46,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205312945] [2022-12-13 21:23:46,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205312945] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:46,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:46,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:23:46,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744464321] [2022-12-13 21:23:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:46,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:23:46,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:23:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:23:46,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 178 [2022-12-13 21:23:46,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:46,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:46,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 178 [2022-12-13 21:23:46,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:47,028 INFO L130 PetriNetUnfolder]: 326/529 cut-off events. [2022-12-13 21:23:47,028 INFO L131 PetriNetUnfolder]: For 1315/1315 co-relation queries the response was YES. [2022-12-13 21:23:47,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 529 events. 326/529 cut-off events. For 1315/1315 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1854 event pairs, 14 based on Foata normal form. 16/545 useless extension candidates. Maximal degree in co-relation 2038. Up to 187 conditions per place. [2022-12-13 21:23:47,031 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 67 selfloop transitions, 36 changer transitions 0/103 dead transitions. [2022-12-13 21:23:47,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 103 transitions, 808 flow [2022-12-13 21:23:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:23:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 21:23:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 827 transitions. [2022-12-13 21:23:47,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5162297128589264 [2022-12-13 21:23:47,035 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 827 transitions. [2022-12-13 21:23:47,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 827 transitions. [2022-12-13 21:23:47,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:47,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 827 transitions. [2022-12-13 21:23:47,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.88888888888889) internal successors, (827), 9 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,038 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,038 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 168 flow. Second operand 9 states and 827 transitions. [2022-12-13 21:23:47,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 103 transitions, 808 flow [2022-12-13 21:23:47,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 103 transitions, 752 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-12-13 21:23:47,042 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 531 flow [2022-12-13 21:23:47,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=531, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2022-12-13 21:23:47,042 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2022-12-13 21:23:47,043 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 531 flow [2022-12-13 21:23:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,043 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:47,043 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:23:47,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1276125637, now seen corresponding path program 2 times [2022-12-13 21:23:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:47,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129047397] [2022-12-13 21:23:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:47,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:47,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129047397] [2022-12-13 21:23:47,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129047397] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:47,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:47,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:23:47,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040434238] [2022-12-13 21:23:47,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:47,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:23:47,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:47,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:23:47,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:23:47,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 178 [2022-12-13 21:23:47,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 61 transitions, 531 flow. Second operand has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:47,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 178 [2022-12-13 21:23:47,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:47,480 INFO L130 PetriNetUnfolder]: 474/831 cut-off events. [2022-12-13 21:23:47,480 INFO L131 PetriNetUnfolder]: For 5114/5114 co-relation queries the response was YES. [2022-12-13 21:23:47,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 831 events. 474/831 cut-off events. For 5114/5114 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3437 event pairs, 39 based on Foata normal form. 20/851 useless extension candidates. Maximal degree in co-relation 3337. Up to 299 conditions per place. [2022-12-13 21:23:47,485 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 101 selfloop transitions, 63 changer transitions 0/164 dead transitions. [2022-12-13 21:23:47,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 164 transitions, 1652 flow [2022-12-13 21:23:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:23:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 21:23:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 841 transitions. [2022-12-13 21:23:47,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5249687890137328 [2022-12-13 21:23:47,488 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 841 transitions. [2022-12-13 21:23:47,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 841 transitions. [2022-12-13 21:23:47,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:47,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 841 transitions. [2022-12-13 21:23:47,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.44444444444444) internal successors, (841), 9 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,491 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,491 INFO L175 Difference]: Start difference. First operand has 55 places, 61 transitions, 531 flow. Second operand 9 states and 841 transitions. [2022-12-13 21:23:47,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 164 transitions, 1652 flow [2022-12-13 21:23:47,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 164 transitions, 1642 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-12-13 21:23:47,501 INFO L231 Difference]: Finished difference. Result has 71 places, 103 transitions, 1281 flow [2022-12-13 21:23:47,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1281, PETRI_PLACES=71, PETRI_TRANSITIONS=103} [2022-12-13 21:23:47,501 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2022-12-13 21:23:47,502 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 103 transitions, 1281 flow [2022-12-13 21:23:47,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:47,502 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:47,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 21:23:47,502 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1710131591, now seen corresponding path program 3 times [2022-12-13 21:23:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:47,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947612216] [2022-12-13 21:23:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:47,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:47,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:47,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947612216] [2022-12-13 21:23:47,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947612216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:47,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:47,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:23:47,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937984475] [2022-12-13 21:23:47,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:47,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:23:47,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:47,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:23:47,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:23:47,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 178 [2022-12-13 21:23:47,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 103 transitions, 1281 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:47,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 178 [2022-12-13 21:23:47,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:47,945 INFO L130 PetriNetUnfolder]: 553/944 cut-off events. [2022-12-13 21:23:47,945 INFO L131 PetriNetUnfolder]: For 10387/10387 co-relation queries the response was YES. [2022-12-13 21:23:47,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6176 conditions, 944 events. 553/944 cut-off events. For 10387/10387 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3937 event pairs, 8 based on Foata normal form. 36/980 useless extension candidates. Maximal degree in co-relation 5161. Up to 458 conditions per place. [2022-12-13 21:23:47,951 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 100 selfloop transitions, 42 changer transitions 40/182 dead transitions. [2022-12-13 21:23:47,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 182 transitions, 2517 flow [2022-12-13 21:23:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:23:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 21:23:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 826 transitions. [2022-12-13 21:23:47,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5156054931335831 [2022-12-13 21:23:47,953 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 826 transitions. [2022-12-13 21:23:47,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 826 transitions. [2022-12-13 21:23:47,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:47,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 826 transitions. [2022-12-13 21:23:47,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.77777777777777) internal successors, (826), 9 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,956 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,956 INFO L175 Difference]: Start difference. First operand has 71 places, 103 transitions, 1281 flow. Second operand 9 states and 826 transitions. [2022-12-13 21:23:47,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 182 transitions, 2517 flow [2022-12-13 21:23:47,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 182 transitions, 2377 flow, removed 70 selfloop flow, removed 0 redundant places. [2022-12-13 21:23:47,985 INFO L231 Difference]: Finished difference. Result has 85 places, 107 transitions, 1453 flow [2022-12-13 21:23:47,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1453, PETRI_PLACES=85, PETRI_TRANSITIONS=107} [2022-12-13 21:23:47,996 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2022-12-13 21:23:47,996 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 107 transitions, 1453 flow [2022-12-13 21:23:47,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:47,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:47,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:47,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 21:23:47,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:47,997 INFO L85 PathProgramCache]: Analyzing trace with hash -439878021, now seen corresponding path program 4 times [2022-12-13 21:23:47,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:47,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429626022] [2022-12-13 21:23:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:47,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:48,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:48,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429626022] [2022-12-13 21:23:48,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429626022] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:48,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:48,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 21:23:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320252395] [2022-12-13 21:23:48,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:48,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:23:48,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:23:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:23:48,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 178 [2022-12-13 21:23:48,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 107 transitions, 1453 flow. Second operand has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:48,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:48,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 178 [2022-12-13 21:23:48,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:48,471 INFO L130 PetriNetUnfolder]: 616/1097 cut-off events. [2022-12-13 21:23:48,471 INFO L131 PetriNetUnfolder]: For 14200/14245 co-relation queries the response was YES. [2022-12-13 21:23:48,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7497 conditions, 1097 events. 616/1097 cut-off events. For 14200/14245 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5229 event pairs, 20 based on Foata normal form. 43/1134 useless extension candidates. Maximal degree in co-relation 6096. Up to 634 conditions per place. [2022-12-13 21:23:48,477 INFO L137 encePairwiseOnDemand]: 171/178 looper letters, 108 selfloop transitions, 15 changer transitions 95/225 dead transitions. [2022-12-13 21:23:48,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 225 transitions, 3421 flow [2022-12-13 21:23:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:23:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:23:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 705 transitions. [2022-12-13 21:23:48,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49508426966292135 [2022-12-13 21:23:48,480 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 705 transitions. [2022-12-13 21:23:48,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 705 transitions. [2022-12-13 21:23:48,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:48,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 705 transitions. [2022-12-13 21:23:48,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.125) internal successors, (705), 8 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:48,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:48,482 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:48,482 INFO L175 Difference]: Start difference. First operand has 85 places, 107 transitions, 1453 flow. Second operand 8 states and 705 transitions. [2022-12-13 21:23:48,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 225 transitions, 3421 flow [2022-12-13 21:23:48,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 225 transitions, 3280 flow, removed 41 selfloop flow, removed 5 redundant places. [2022-12-13 21:23:48,524 INFO L231 Difference]: Finished difference. Result has 92 places, 115 transitions, 1633 flow [2022-12-13 21:23:48,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1633, PETRI_PLACES=92, PETRI_TRANSITIONS=115} [2022-12-13 21:23:48,525 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2022-12-13 21:23:48,525 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 115 transitions, 1633 flow [2022-12-13 21:23:48,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:48,525 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:48,525 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:48,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 21:23:48,525 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1580240331, now seen corresponding path program 1 times [2022-12-13 21:23:48,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:48,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510225089] [2022-12-13 21:23:48,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:48,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:48,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:48,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510225089] [2022-12-13 21:23:48,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510225089] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:23:48,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782578591] [2022-12-13 21:23:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:48,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:48,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:48,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:23:48,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:23:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:48,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:23:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:23:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:48,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:23:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:48,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782578591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:23:48,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:23:48,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 21:23:48,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137237450] [2022-12-13 21:23:48,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:23:48,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 21:23:48,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 21:23:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:23:49,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 178 [2022-12-13 21:23:49,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 115 transitions, 1633 flow. Second operand has 13 states, 13 states have (on average 80.3076923076923) internal successors, (1044), 13 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:49,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:49,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 178 [2022-12-13 21:23:49,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:49,704 INFO L130 PetriNetUnfolder]: 862/1502 cut-off events. [2022-12-13 21:23:49,704 INFO L131 PetriNetUnfolder]: For 20649/20653 co-relation queries the response was YES. [2022-12-13 21:23:49,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10730 conditions, 1502 events. 862/1502 cut-off events. For 20649/20653 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7380 event pairs, 10 based on Foata normal form. 54/1555 useless extension candidates. Maximal degree in co-relation 10084. Up to 461 conditions per place. [2022-12-13 21:23:49,716 INFO L137 encePairwiseOnDemand]: 171/178 looper letters, 118 selfloop transitions, 58 changer transitions 144/327 dead transitions. [2022-12-13 21:23:49,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 327 transitions, 5021 flow [2022-12-13 21:23:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 21:23:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 21:23:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1438 transitions. [2022-12-13 21:23:49,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47521480502313285 [2022-12-13 21:23:49,719 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1438 transitions. [2022-12-13 21:23:49,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1438 transitions. [2022-12-13 21:23:49,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:49,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1438 transitions. [2022-12-13 21:23:49,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 84.58823529411765) internal successors, (1438), 17 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:49,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 178.0) internal successors, (3204), 18 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:49,724 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 178.0) internal successors, (3204), 18 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:49,724 INFO L175 Difference]: Start difference. First operand has 92 places, 115 transitions, 1633 flow. Second operand 17 states and 1438 transitions. [2022-12-13 21:23:49,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 327 transitions, 5021 flow [2022-12-13 21:23:49,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 327 transitions, 4695 flow, removed 106 selfloop flow, removed 6 redundant places. [2022-12-13 21:23:49,782 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 2024 flow [2022-12-13 21:23:49,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2024, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2022-12-13 21:23:49,783 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2022-12-13 21:23:49,783 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 2024 flow [2022-12-13 21:23:49,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 80.3076923076923) internal successors, (1044), 13 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:49,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:49,784 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:49,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:23:49,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 21:23:49,985 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash -713254882, now seen corresponding path program 5 times [2022-12-13 21:23:49,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:49,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40277637] [2022-12-13 21:23:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:49,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:50,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40277637] [2022-12-13 21:23:50,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40277637] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:23:50,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997639478] [2022-12-13 21:23:50,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:23:50,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:50,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:50,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:23:50,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:23:50,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 21:23:50,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:23:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 21:23:50,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:23:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:50,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:23:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:50,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997639478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:23:50,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:23:50,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-12-13 21:23:50,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721401065] [2022-12-13 21:23:50,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:23:50,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 21:23:50,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:50,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 21:23:50,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-12-13 21:23:50,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 178 [2022-12-13 21:23:50,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 2024 flow. Second operand has 17 states, 17 states have (on average 79.88235294117646) internal successors, (1358), 17 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:50,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:50,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 178 [2022-12-13 21:23:50,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:51,664 INFO L130 PetriNetUnfolder]: 1154/1988 cut-off events. [2022-12-13 21:23:51,664 INFO L131 PetriNetUnfolder]: For 38368/38370 co-relation queries the response was YES. [2022-12-13 21:23:51,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15942 conditions, 1988 events. 1154/1988 cut-off events. For 38368/38370 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10033 event pairs, 18 based on Foata normal form. 102/2088 useless extension candidates. Maximal degree in co-relation 13583. Up to 689 conditions per place. [2022-12-13 21:23:51,678 INFO L137 encePairwiseOnDemand]: 171/178 looper letters, 151 selfloop transitions, 115 changer transitions 155/425 dead transitions. [2022-12-13 21:23:51,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 425 transitions, 7419 flow [2022-12-13 21:23:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 21:23:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 21:23:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2326 transitions. [2022-12-13 21:23:51,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46669341894060995 [2022-12-13 21:23:51,682 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2326 transitions. [2022-12-13 21:23:51,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2326 transitions. [2022-12-13 21:23:51,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:51,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2326 transitions. [2022-12-13 21:23:51,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 83.07142857142857) internal successors, (2326), 28 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:51,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 178.0) internal successors, (5162), 29 states have internal predecessors, (5162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:51,690 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 178.0) internal successors, (5162), 29 states have internal predecessors, (5162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:51,690 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 2024 flow. Second operand 28 states and 2326 transitions. [2022-12-13 21:23:51,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 425 transitions, 7419 flow [2022-12-13 21:23:51,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 425 transitions, 6571 flow, removed 292 selfloop flow, removed 11 redundant places. [2022-12-13 21:23:51,801 INFO L231 Difference]: Finished difference. Result has 130 places, 204 transitions, 3391 flow [2022-12-13 21:23:51,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3391, PETRI_PLACES=130, PETRI_TRANSITIONS=204} [2022-12-13 21:23:51,801 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2022-12-13 21:23:51,801 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 204 transitions, 3391 flow [2022-12-13 21:23:51,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 79.88235294117646) internal successors, (1358), 17 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:51,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:51,802 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:51,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:23:52,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:52,003 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1464120221, now seen corresponding path program 1 times [2022-12-13 21:23:52,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:52,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772745124] [2022-12-13 21:23:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:52,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:52,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772745124] [2022-12-13 21:23:52,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772745124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:23:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800680827] [2022-12-13 21:23:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:52,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:52,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:52,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:23:52,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:23:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 21:23:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:23:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:52,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:23:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:53,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800680827] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:23:53,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:23:53,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 22 [2022-12-13 21:23:53,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349722619] [2022-12-13 21:23:53,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:23:53,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 21:23:53,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 21:23:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-12-13 21:23:53,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2022-12-13 21:23:53,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 204 transitions, 3391 flow. Second operand has 23 states, 23 states have (on average 70.56521739130434) internal successors, (1623), 23 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:53,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:53,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2022-12-13 21:23:53,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:56,542 INFO L130 PetriNetUnfolder]: 1752/2901 cut-off events. [2022-12-13 21:23:56,542 INFO L131 PetriNetUnfolder]: For 50448/50448 co-relation queries the response was YES. [2022-12-13 21:23:56,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23168 conditions, 2901 events. 1752/2901 cut-off events. For 50448/50448 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15072 event pairs, 0 based on Foata normal form. 114/3015 useless extension candidates. Maximal degree in co-relation 22290. Up to 977 conditions per place. [2022-12-13 21:23:56,563 INFO L137 encePairwiseOnDemand]: 168/178 looper letters, 226 selfloop transitions, 275 changer transitions 206/707 dead transitions. [2022-12-13 21:23:56,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 707 transitions, 11549 flow [2022-12-13 21:23:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 21:23:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-12-13 21:23:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 6086 transitions. [2022-12-13 21:23:56,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41193989440909706 [2022-12-13 21:23:56,569 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 6086 transitions. [2022-12-13 21:23:56,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 6086 transitions. [2022-12-13 21:23:56,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:56,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 6086 transitions. [2022-12-13 21:23:56,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 73.32530120481928) internal successors, (6086), 83 states have internal predecessors, (6086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:56,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 178.0) internal successors, (14952), 84 states have internal predecessors, (14952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:56,590 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 178.0) internal successors, (14952), 84 states have internal predecessors, (14952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:56,590 INFO L175 Difference]: Start difference. First operand has 130 places, 204 transitions, 3391 flow. Second operand 83 states and 6086 transitions. [2022-12-13 21:23:56,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 707 transitions, 11549 flow [2022-12-13 21:23:56,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 707 transitions, 9287 flow, removed 992 selfloop flow, removed 15 redundant places. [2022-12-13 21:23:56,889 INFO L231 Difference]: Finished difference. Result has 215 places, 341 transitions, 5408 flow [2022-12-13 21:23:56,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=5408, PETRI_PLACES=215, PETRI_TRANSITIONS=341} [2022-12-13 21:23:56,889 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2022-12-13 21:23:56,889 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 341 transitions, 5408 flow [2022-12-13 21:23:56,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 70.56521739130434) internal successors, (1623), 23 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:56,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:56,890 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:56,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:23:57,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:57,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:23:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:57,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1761964295, now seen corresponding path program 2 times [2022-12-13 21:23:57,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:57,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828690707] [2022-12-13 21:23:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:57,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:57,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828690707] [2022-12-13 21:23:57,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828690707] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:23:57,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738955188] [2022-12-13 21:23:57,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:23:57,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:57,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:57,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:23:57,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:23:57,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:23:57,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:23:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:23:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:23:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:57,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:23:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:23:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738955188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:23:57,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:23:57,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2022-12-13 21:23:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706119709] [2022-12-13 21:23:57,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:23:57,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 21:23:57,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 21:23:57,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-13 21:23:57,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 178 [2022-12-13 21:23:57,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 341 transitions, 5408 flow. Second operand has 20 states, 20 states have (on average 72.0) internal successors, (1440), 20 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:57,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:57,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 178 [2022-12-13 21:23:57,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:24:01,077 INFO L130 PetriNetUnfolder]: 2967/4920 cut-off events. [2022-12-13 21:24:01,078 INFO L131 PetriNetUnfolder]: For 72459/72459 co-relation queries the response was YES. [2022-12-13 21:24:01,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36828 conditions, 4920 events. 2967/4920 cut-off events. For 72459/72459 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28704 event pairs, 27 based on Foata normal form. 276/5196 useless extension candidates. Maximal degree in co-relation 36546. Up to 1697 conditions per place. [2022-12-13 21:24:01,108 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 375 selfloop transitions, 271 changer transitions 411/1057 dead transitions. [2022-12-13 21:24:01,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1057 transitions, 18001 flow [2022-12-13 21:24:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-13 21:24:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-12-13 21:24:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 6683 transitions. [2022-12-13 21:24:01,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41716604244694133 [2022-12-13 21:24:01,116 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 6683 transitions. [2022-12-13 21:24:01,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 6683 transitions. [2022-12-13 21:24:01,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:24:01,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 6683 transitions. [2022-12-13 21:24:01,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 74.25555555555556) internal successors, (6683), 90 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:01,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 178.0) internal successors, (16198), 91 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:01,141 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 178.0) internal successors, (16198), 91 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:01,141 INFO L175 Difference]: Start difference. First operand has 215 places, 341 transitions, 5408 flow. Second operand 90 states and 6683 transitions. [2022-12-13 21:24:01,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1057 transitions, 18001 flow [2022-12-13 21:24:01,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1057 transitions, 15747 flow, removed 1001 selfloop flow, removed 32 redundant places. [2022-12-13 21:24:01,830 INFO L231 Difference]: Finished difference. Result has 295 places, 489 transitions, 7931 flow [2022-12-13 21:24:01,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=4650, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=7931, PETRI_PLACES=295, PETRI_TRANSITIONS=489} [2022-12-13 21:24:01,831 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2022-12-13 21:24:01,831 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 489 transitions, 7931 flow [2022-12-13 21:24:01,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 72.0) internal successors, (1440), 20 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:01,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:24:01,832 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:01,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 21:24:02,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 21:24:02,034 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:24:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1570690949, now seen corresponding path program 3 times [2022-12-13 21:24:02,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:02,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263681201] [2022-12-13 21:24:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:02,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:02,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:02,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263681201] [2022-12-13 21:24:02,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263681201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:24:02,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436935091] [2022-12-13 21:24:02,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:24:02,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:24:02,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:24:02,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:24:02,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:24:02,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 21:24:02,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:24:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 21:24:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:24:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:02,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:24:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:02,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436935091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:24:02,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:24:02,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2022-12-13 21:24:02,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420380805] [2022-12-13 21:24:02,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:24:02,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 21:24:02,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 21:24:02,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-12-13 21:24:03,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2022-12-13 21:24:03,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 489 transitions, 7931 flow. Second operand has 22 states, 22 states have (on average 70.63636363636364) internal successors, (1554), 22 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:03,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:24:03,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2022-12-13 21:24:03,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:24:07,119 INFO L130 PetriNetUnfolder]: 4492/7433 cut-off events. [2022-12-13 21:24:07,119 INFO L131 PetriNetUnfolder]: For 175139/175139 co-relation queries the response was YES. [2022-12-13 21:24:07,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60053 conditions, 7433 events. 4492/7433 cut-off events. For 175139/175139 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 46345 event pairs, 35 based on Foata normal form. 256/7689 useless extension candidates. Maximal degree in co-relation 59221. Up to 2425 conditions per place. [2022-12-13 21:24:07,195 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 440 selfloop transitions, 550 changer transitions 367/1357 dead transitions. [2022-12-13 21:24:07,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1357 transitions, 25159 flow [2022-12-13 21:24:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-13 21:24:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-12-13 21:24:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 5761 transitions. [2022-12-13 21:24:07,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41493805819648516 [2022-12-13 21:24:07,202 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 5761 transitions. [2022-12-13 21:24:07,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 5761 transitions. [2022-12-13 21:24:07,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:24:07,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 5761 transitions. [2022-12-13 21:24:07,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 73.85897435897436) internal successors, (5761), 78 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:07,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 178.0) internal successors, (14062), 79 states have internal predecessors, (14062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:07,220 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 178.0) internal successors, (14062), 79 states have internal predecessors, (14062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:07,220 INFO L175 Difference]: Start difference. First operand has 295 places, 489 transitions, 7931 flow. Second operand 78 states and 5761 transitions. [2022-12-13 21:24:07,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1357 transitions, 25159 flow [2022-12-13 21:24:09,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1357 transitions, 21561 flow, removed 1529 selfloop flow, removed 61 redundant places. [2022-12-13 21:24:09,064 INFO L231 Difference]: Finished difference. Result has 300 places, 802 transitions, 13912 flow [2022-12-13 21:24:09,065 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=7118, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=13912, PETRI_PLACES=300, PETRI_TRANSITIONS=802} [2022-12-13 21:24:09,065 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2022-12-13 21:24:09,065 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 802 transitions, 13912 flow [2022-12-13 21:24:09,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 70.63636363636364) internal successors, (1554), 22 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:09,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:24:09,066 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:09,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 21:24:09,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 21:24:09,266 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:24:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:09,267 INFO L85 PathProgramCache]: Analyzing trace with hash 28821689, now seen corresponding path program 4 times [2022-12-13 21:24:09,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:09,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300709085] [2022-12-13 21:24:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:09,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:09,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300709085] [2022-12-13 21:24:09,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300709085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:24:09,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058381347] [2022-12-13 21:24:09,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:24:09,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:24:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:24:09,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:24:09,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:24:09,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:24:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:24:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 21:24:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:24:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:09,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:24:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:10,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058381347] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:24:10,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:24:10,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2022-12-13 21:24:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456231906] [2022-12-13 21:24:10,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:24:10,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 21:24:10,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:10,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 21:24:10,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-12-13 21:24:10,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2022-12-13 21:24:10,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 802 transitions, 13912 flow. Second operand has 23 states, 23 states have (on average 70.52173913043478) internal successors, (1622), 23 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:10,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:24:10,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2022-12-13 21:24:10,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:24:16,804 INFO L130 PetriNetUnfolder]: 6219/10326 cut-off events. [2022-12-13 21:24:16,805 INFO L131 PetriNetUnfolder]: For 163164/163164 co-relation queries the response was YES. [2022-12-13 21:24:16,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84694 conditions, 10326 events. 6219/10326 cut-off events. For 163164/163164 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 67651 event pairs, 64 based on Foata normal form. 228/10554 useless extension candidates. Maximal degree in co-relation 84554. Up to 3550 conditions per place. [2022-12-13 21:24:16,903 INFO L137 encePairwiseOnDemand]: 168/178 looper letters, 808 selfloop transitions, 680 changer transitions 403/1891 dead transitions. [2022-12-13 21:24:16,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1891 transitions, 35082 flow [2022-12-13 21:24:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-13 21:24:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-12-13 21:24:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 7278 transitions. [2022-12-13 21:24:16,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41300646918624445 [2022-12-13 21:24:16,910 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 7278 transitions. [2022-12-13 21:24:16,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 7278 transitions. [2022-12-13 21:24:16,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:24:16,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 7278 transitions. [2022-12-13 21:24:16,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 73.51515151515152) internal successors, (7278), 99 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:16,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 178.0) internal successors, (17800), 100 states have internal predecessors, (17800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:16,930 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 178.0) internal successors, (17800), 100 states have internal predecessors, (17800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:16,930 INFO L175 Difference]: Start difference. First operand has 300 places, 802 transitions, 13912 flow. Second operand 99 states and 7278 transitions. [2022-12-13 21:24:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1891 transitions, 35082 flow [2022-12-13 21:24:19,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1891 transitions, 32310 flow, removed 1153 selfloop flow, removed 39 redundant places. [2022-12-13 21:24:19,872 INFO L231 Difference]: Finished difference. Result has 376 places, 1217 transitions, 22420 flow [2022-12-13 21:24:19,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=12960, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=22420, PETRI_PLACES=376, PETRI_TRANSITIONS=1217} [2022-12-13 21:24:19,873 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 346 predicate places. [2022-12-13 21:24:19,873 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 1217 transitions, 22420 flow [2022-12-13 21:24:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 70.52173913043478) internal successors, (1622), 23 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:19,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:24:19,874 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:19,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:24:20,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 21:24:20,075 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:24:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -493278178, now seen corresponding path program 5 times [2022-12-13 21:24:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:20,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964290821] [2022-12-13 21:24:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:20,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964290821] [2022-12-13 21:24:20,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964290821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:24:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098076188] [2022-12-13 21:24:20,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:24:20,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:24:20,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:24:20,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:24:20,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:24:20,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 21:24:20,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:24:20,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 21:24:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:24:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:20,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:24:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:20,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098076188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:24:20,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:24:20,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2022-12-13 21:24:20,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092979322] [2022-12-13 21:24:20,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:24:20,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 21:24:20,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 21:24:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-12-13 21:24:21,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2022-12-13 21:24:21,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 1217 transitions, 22420 flow. Second operand has 27 states, 27 states have (on average 70.48148148148148) internal successors, (1903), 27 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:21,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:24:21,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2022-12-13 21:24:21,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:24:35,582 INFO L130 PetriNetUnfolder]: 10856/18051 cut-off events. [2022-12-13 21:24:35,582 INFO L131 PetriNetUnfolder]: For 267718/267718 co-relation queries the response was YES. [2022-12-13 21:24:35,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150659 conditions, 18051 events. 10856/18051 cut-off events. For 267718/267718 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 128173 event pairs, 82 based on Foata normal form. 802/18853 useless extension candidates. Maximal degree in co-relation 150463. Up to 5793 conditions per place. [2022-12-13 21:24:35,785 INFO L137 encePairwiseOnDemand]: 167/178 looper letters, 691 selfloop transitions, 1759 changer transitions 1152/3602 dead transitions. [2022-12-13 21:24:35,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 3602 transitions, 69728 flow [2022-12-13 21:24:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-12-13 21:24:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2022-12-13 21:24:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 15573 transitions. [2022-12-13 21:24:35,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40882600021001786 [2022-12-13 21:24:35,798 INFO L72 ComplementDD]: Start complementDD. Operand 214 states and 15573 transitions. [2022-12-13 21:24:35,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 214 states and 15573 transitions. [2022-12-13 21:24:35,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:24:35,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 214 states and 15573 transitions. [2022-12-13 21:24:35,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 215 states, 214 states have (on average 72.77102803738318) internal successors, (15573), 214 states have internal predecessors, (15573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:35,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 215 states, 215 states have (on average 178.0) internal successors, (38270), 215 states have internal predecessors, (38270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:35,840 INFO L81 ComplementDD]: Finished complementDD. Result has 215 states, 215 states have (on average 178.0) internal successors, (38270), 215 states have internal predecessors, (38270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:35,840 INFO L175 Difference]: Start difference. First operand has 376 places, 1217 transitions, 22420 flow. Second operand 214 states and 15573 transitions. [2022-12-13 21:24:35,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 3602 transitions, 69728 flow [2022-12-13 21:24:44,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 3602 transitions, 66222 flow, removed 1522 selfloop flow, removed 42 redundant places. [2022-12-13 21:24:44,482 INFO L231 Difference]: Finished difference. Result has 658 places, 2096 transitions, 42928 flow [2022-12-13 21:24:44,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=20311, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=850, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=214, PETRI_FLOW=42928, PETRI_PLACES=658, PETRI_TRANSITIONS=2096} [2022-12-13 21:24:44,483 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 628 predicate places. [2022-12-13 21:24:44,483 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 2096 transitions, 42928 flow [2022-12-13 21:24:44,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 70.48148148148148) internal successors, (1903), 27 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:44,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:24:44,484 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:24:44,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:24:44,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 21:24:44,685 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:24:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1815128135, now seen corresponding path program 6 times [2022-12-13 21:24:44,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:44,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622808432] [2022-12-13 21:24:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:44,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:45,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:45,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622808432] [2022-12-13 21:24:45,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622808432] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:24:45,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907071225] [2022-12-13 21:24:45,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 21:24:45,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:24:45,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:24:45,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:24:45,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:24:45,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 21:24:45,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:24:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 21:24:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:24:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:45,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:24:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:24:46,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907071225] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:24:46,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:24:46,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 34 [2022-12-13 21:24:46,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498271193] [2022-12-13 21:24:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:24:46,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 21:24:46,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 21:24:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 21:24:46,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2022-12-13 21:24:46,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 2096 transitions, 42928 flow. Second operand has 35 states, 35 states have (on average 69.94285714285714) internal successors, (2448), 35 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:24:46,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:24:46,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2022-12-13 21:24:46,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:25:21,431 INFO L130 PetriNetUnfolder]: 21472/36507 cut-off events. [2022-12-13 21:25:21,431 INFO L131 PetriNetUnfolder]: For 1897113/1897113 co-relation queries the response was YES. [2022-12-13 21:25:22,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373147 conditions, 36507 events. 21472/36507 cut-off events. For 1897113/1897113 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 297381 event pairs, 42 based on Foata normal form. 836/37343 useless extension candidates. Maximal degree in co-relation 372901. Up to 11785 conditions per place. [2022-12-13 21:25:22,574 INFO L137 encePairwiseOnDemand]: 168/178 looper letters, 1614 selfloop transitions, 3317 changer transitions 1809/6740 dead transitions. [2022-12-13 21:25:22,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 6740 transitions, 150896 flow [2022-12-13 21:25:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2022-12-13 21:25:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2022-12-13 21:25:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 20040 transitions. [2022-12-13 21:25:22,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4123965921718731 [2022-12-13 21:25:22,589 INFO L72 ComplementDD]: Start complementDD. Operand 273 states and 20040 transitions. [2022-12-13 21:25:22,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 273 states and 20040 transitions. [2022-12-13 21:25:22,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:25:22,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 273 states and 20040 transitions. [2022-12-13 21:25:22,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 274 states, 273 states have (on average 73.4065934065934) internal successors, (20040), 273 states have internal predecessors, (20040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:22,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 274 states, 274 states have (on average 178.0) internal successors, (48772), 274 states have internal predecessors, (48772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:22,637 INFO L81 ComplementDD]: Finished complementDD. Result has 274 states, 274 states have (on average 178.0) internal successors, (48772), 274 states have internal predecessors, (48772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:25:22,637 INFO L175 Difference]: Start difference. First operand has 658 places, 2096 transitions, 42928 flow. Second operand 273 states and 20040 transitions. [2022-12-13 21:25:22,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 6740 transitions, 150896 flow [2022-12-13 21:26:18,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 6740 transitions, 128021 flow, removed 10444 selfloop flow, removed 136 redundant places. [2022-12-13 21:26:18,116 INFO L231 Difference]: Finished difference. Result has 753 places, 4443 transitions, 94532 flow [2022-12-13 21:26:18,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=38154, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=273, PETRI_FLOW=94532, PETRI_PLACES=753, PETRI_TRANSITIONS=4443} [2022-12-13 21:26:18,117 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 723 predicate places. [2022-12-13 21:26:18,117 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 4443 transitions, 94532 flow [2022-12-13 21:26:18,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 69.94285714285714) internal successors, (2448), 35 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:18,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:26:18,118 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:26:18,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 21:26:18,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:26:18,319 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:26:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:26:18,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1317526819, now seen corresponding path program 7 times [2022-12-13 21:26:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:26:18,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190421022] [2022-12-13 21:26:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:26:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:26:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:26:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:26:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:26:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190421022] [2022-12-13 21:26:18,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190421022] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:26:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021673860] [2022-12-13 21:26:18,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 21:26:18,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:26:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:26:18,829 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:26:18,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:26:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:26:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 21:26:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:26:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:26:19,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:26:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:26:19,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021673860] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:26:19,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:26:19,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2022-12-13 21:26:19,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653314467] [2022-12-13 21:26:19,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:26:19,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 21:26:19,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:26:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 21:26:19,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-12-13 21:26:19,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2022-12-13 21:26:19,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 4443 transitions, 94532 flow. Second operand has 32 states, 32 states have (on average 70.1875) internal successors, (2246), 32 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:26:19,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:26:19,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2022-12-13 21:26:19,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:27:17,989 INFO L130 PetriNetUnfolder]: 30112/51417 cut-off events. [2022-12-13 21:27:17,989 INFO L131 PetriNetUnfolder]: For 2128251/2128251 co-relation queries the response was YES. [2022-12-13 21:27:19,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504945 conditions, 51417 events. 30112/51417 cut-off events. For 2128251/2128251 co-relation queries the response was YES. Maximal size of possible extension queue 1980. Compared 441367 event pairs, 164 based on Foata normal form. 726/52143 useless extension candidates. Maximal degree in co-relation 504717. Up to 16422 conditions per place. [2022-12-13 21:27:19,623 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 2828 selfloop transitions, 4628 changer transitions 1458/8914 dead transitions. [2022-12-13 21:27:19,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 8914 transitions, 203273 flow [2022-12-13 21:27:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-12-13 21:27:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2022-12-13 21:27:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 13133 transitions. [2022-12-13 21:27:19,634 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4168412365898559 [2022-12-13 21:27:19,634 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 13133 transitions. [2022-12-13 21:27:19,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 13133 transitions. [2022-12-13 21:27:19,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:27:19,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 13133 transitions. [2022-12-13 21:27:19,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 74.19774011299435) internal successors, (13133), 177 states have internal predecessors, (13133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:19,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 178 states, 178 states have (on average 178.0) internal successors, (31684), 178 states have internal predecessors, (31684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:19,664 INFO L81 ComplementDD]: Finished complementDD. Result has 178 states, 178 states have (on average 178.0) internal successors, (31684), 178 states have internal predecessors, (31684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:27:19,664 INFO L175 Difference]: Start difference. First operand has 753 places, 4443 transitions, 94532 flow. Second operand 177 states and 13133 transitions. [2022-12-13 21:27:19,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 8914 transitions, 203273 flow [2022-12-13 21:29:12,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 8914 transitions, 194035 flow, removed 4533 selfloop flow, removed 96 redundant places. [2022-12-13 21:29:12,993 INFO L231 Difference]: Finished difference. Result has 769 places, 6922 transitions, 161193 flow [2022-12-13 21:29:12,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=90653, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=161193, PETRI_PLACES=769, PETRI_TRANSITIONS=6922} [2022-12-13 21:29:12,996 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 739 predicate places. [2022-12-13 21:29:12,996 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 6922 transitions, 161193 flow [2022-12-13 21:29:12,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 70.1875) internal successors, (2246), 32 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:29:12,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:29:12,996 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:29:13,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 21:29:13,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 21:29:13,197 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:29:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:29:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash -930334935, now seen corresponding path program 8 times [2022-12-13 21:29:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:29:13,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417061519] [2022-12-13 21:29:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:29:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:29:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:29:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:29:13,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:29:13,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417061519] [2022-12-13 21:29:13,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417061519] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:29:13,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902782974] [2022-12-13 21:29:13,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:29:13,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:29:13,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:29:13,625 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:29:13,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:29:13,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:29:13,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:29:13,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 21:29:13,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:29:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:29:13,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:29:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:29:14,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902782974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:29:14,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:29:14,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 33 [2022-12-13 21:29:14,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234521040] [2022-12-13 21:29:14,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:29:14,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 21:29:14,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:29:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 21:29:14,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 21:29:14,776 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2022-12-13 21:29:14,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 6922 transitions, 161193 flow. Second operand has 34 states, 34 states have (on average 70.11764705882354) internal successors, (2384), 34 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:29:14,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:29:14,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2022-12-13 21:29:14,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:31:27,146 INFO L130 PetriNetUnfolder]: 45679/78764 cut-off events. [2022-12-13 21:31:27,147 INFO L131 PetriNetUnfolder]: For 2281376/2281376 co-relation queries the response was YES. [2022-12-13 21:31:29,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 805151 conditions, 78764 events. 45679/78764 cut-off events. For 2281376/2281376 co-relation queries the response was YES. Maximal size of possible extension queue 2906. Compared 723281 event pairs, 714 based on Foata normal form. 1254/80018 useless extension candidates. Maximal degree in co-relation 804919. Up to 23625 conditions per place. [2022-12-13 21:31:30,003 INFO L137 encePairwiseOnDemand]: 169/178 looper letters, 3502 selfloop transitions, 8696 changer transitions 1516/13714 dead transitions. [2022-12-13 21:31:30,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 13714 transitions, 346309 flow [2022-12-13 21:31:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-12-13 21:31:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2022-12-13 21:31:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 15483 transitions. [2022-12-13 21:31:30,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41224239842377125 [2022-12-13 21:31:30,015 INFO L72 ComplementDD]: Start complementDD. Operand 211 states and 15483 transitions. [2022-12-13 21:31:30,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 211 states and 15483 transitions. [2022-12-13 21:31:30,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:31:30,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 211 states and 15483 transitions. [2022-12-13 21:31:30,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 212 states, 211 states have (on average 73.37914691943128) internal successors, (15483), 211 states have internal predecessors, (15483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:30,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 212 states, 212 states have (on average 178.0) internal successors, (37736), 212 states have internal predecessors, (37736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:30,051 INFO L81 ComplementDD]: Finished complementDD. Result has 212 states, 212 states have (on average 178.0) internal successors, (37736), 212 states have internal predecessors, (37736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:31:30,051 INFO L175 Difference]: Start difference. First operand has 769 places, 6922 transitions, 161193 flow. Second operand 211 states and 15483 transitions. [2022-12-13 21:31:30,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 13714 transitions, 346309 flow [2022-12-13 21:36:29,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 13714 transitions, 336946 flow, removed 4613 selfloop flow, removed 62 redundant places. [2022-12-13 21:36:29,779 INFO L231 Difference]: Finished difference. Result has 942 places, 11416 transitions, 293780 flow [2022-12-13 21:36:29,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=157870, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=211, PETRI_FLOW=293780, PETRI_PLACES=942, PETRI_TRANSITIONS=11416} [2022-12-13 21:36:29,782 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 912 predicate places. [2022-12-13 21:36:29,783 INFO L495 AbstractCegarLoop]: Abstraction has has 942 places, 11416 transitions, 293780 flow [2022-12-13 21:36:29,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.11764705882354) internal successors, (2384), 34 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:36:29,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:36:29,783 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:36:29,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 21:36:29,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:36:29,985 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 21:36:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:36:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1210267313, now seen corresponding path program 9 times [2022-12-13 21:36:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:36:29,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554384345] [2022-12-13 21:36:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:36:29,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:36:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:36:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:36:30,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:36:30,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554384345] [2022-12-13 21:36:30,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554384345] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:36:30,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184052337] [2022-12-13 21:36:30,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:36:30,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:36:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:36:30,448 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:36:30,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8031f88-da43-42f4-8c98-af950f7c969e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 21:36:30,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 21:36:30,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:36:30,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 21:36:30,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:36:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:36:30,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:36:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:36:31,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184052337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:36:31,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:36:31,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 30 [2022-12-13 21:36:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271072371] [2022-12-13 21:36:31,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:36:31,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 21:36:31,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:36:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 21:36:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-12-13 21:36:31,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 178 [2022-12-13 21:36:31,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 942 places, 11416 transitions, 293780 flow. Second operand has 31 states, 31 states have (on average 71.29032258064517) internal successors, (2210), 31 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:36:31,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:36:31,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 178 [2022-12-13 21:36:31,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand