./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-38b53e6 [2022-11-25 17:06:54,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:06:54,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:06:55,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:06:55,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:06:55,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:06:55,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:06:55,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:06:55,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:06:55,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:06:55,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:06:55,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:06:55,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:06:55,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:06:55,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:06:55,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:06:55,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:06:55,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:06:55,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:06:55,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:06:55,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:06:55,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:06:55,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:06:55,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:06:55,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:06:55,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:06:55,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:06:55,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:06:55,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:06:55,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:06:55,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:06:55,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:06:55,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:06:55,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:06:55,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:06:55,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:06:55,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:06:55,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:06:55,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:06:55,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:06:55,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:06:55,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:06:55,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:06:55,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:06:55,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:06:55,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:06:55,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:06:55,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:06:55,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:06:55,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:06:55,186 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:06:55,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:06:55,186 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:06:55,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:06:55,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:06:55,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:06:55,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:06:55,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:06:55,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:06:55,188 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:06:55,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:06:55,189 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:06:55,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:06:55,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:06:55,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:06:55,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:06:55,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:06:55,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:06:55,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:06:55,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:06:55,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:06:55,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:06:55,196 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:06:55,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:06:55,197 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:06:55,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:06:55,198 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_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 [2022-11-25 17:06:55,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:06:55,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:06:55,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:06:55,532 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:06:55,532 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:06:55,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2022-11-25 17:06:59,414 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:06:59,727 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:06:59,727 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2022-11-25 17:06:59,740 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/data/a8bbac90a/bc18cc6d8fbc41e7860cdd20cdcc4430/FLAGa3482c6a2 [2022-11-25 17:06:59,764 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/data/a8bbac90a/bc18cc6d8fbc41e7860cdd20cdcc4430 [2022-11-25 17:06:59,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:06:59,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:06:59,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:06:59,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:06:59,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:06:59,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:06:59" (1/1) ... [2022-11-25 17:06:59,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c8f381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:06:59, skipping insertion in model container [2022-11-25 17:06:59,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:06:59" (1/1) ... [2022-11-25 17:06:59,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:06:59,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:07:00,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,055 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,056 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,060 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,062 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,063 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,063 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,064 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,065 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,066 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,067 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,079 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_c2883f49-1406-4b84-94cf-755824990269/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-11-25 17:07:00,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:07:00,098 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:07:00,126 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,127 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,128 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,128 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,129 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,130 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,133 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,143 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,145 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,148 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,148 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,150 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:07:00,150 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:07:00,157 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_c2883f49-1406-4b84-94cf-755824990269/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2022-11-25 17:07:00,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:07:00,188 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:07:00,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00 WrapperNode [2022-11-25 17:07:00,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:07:00,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:07:00,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:07:00,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:07:00,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,282 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-11-25 17:07:00,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:07:00,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:07:00,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:07:00,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:07:00,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,329 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:07:00,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:07:00,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:07:00,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:07:00,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (1/1) ... [2022-11-25 17:07:00,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:07:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:00,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:07:00,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:07:00,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:07:00,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:07:00,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:07:00,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:07:00,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:07:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:07:00,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:07:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:07:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:07:00,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:07:00,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:07:00,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:07:00,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:07:00,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:07:00,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:07:00,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:07:00,476 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:07:00,666 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:07:00,683 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:07:01,021 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:07:01,059 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:07:01,059 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:07:01,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:07:01 BoogieIcfgContainer [2022-11-25 17:07:01,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:07:01,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:07:01,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:07:01,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:07:01,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:06:59" (1/3) ... [2022-11-25 17:07:01,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9475e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:07:01, skipping insertion in model container [2022-11-25 17:07:01,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:07:00" (2/3) ... [2022-11-25 17:07:01,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9475e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:07:01, skipping insertion in model container [2022-11-25 17:07:01,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:07:01" (3/3) ... [2022-11-25 17:07:01,077 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2022-11-25 17:07:01,088 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:07:01,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:07:01,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:07:01,101 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:07:01,202 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:07:01,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2022-11-25 17:07:01,406 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2022-11-25 17:07:01,407 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:07:01,416 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 69 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. [2022-11-25 17:07:01,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 234 flow [2022-11-25 17:07:01,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 91 transitions, 200 flow [2022-11-25 17:07:01,431 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:07:01,471 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 91 transitions, 200 flow [2022-11-25 17:07:01,486 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 91 transitions, 200 flow [2022-11-25 17:07:01,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 91 transitions, 200 flow [2022-11-25 17:07:01,541 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-11-25 17:07:01,541 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:07:01,542 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 67 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. [2022-11-25 17:07:01,544 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2022-11-25 17:07:06,426 INFO L134 LiptonReduction]: Checked pairs total: 1291 [2022-11-25 17:07:06,426 INFO L136 LiptonReduction]: Total number of compositions: 77 [2022-11-25 17:07:06,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:07:06,458 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;@50bab461, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:07:06,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:07:06,467 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2022-11-25 17:07:06,467 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:07:06,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:06,469 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:06,469 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)] === [2022-11-25 17:07:06,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash 158830462, now seen corresponding path program 1 times [2022-11-25 17:07:06,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:06,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313029113] [2022-11-25 17:07:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:06,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:07,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:07,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313029113] [2022-11-25 17:07:07,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313029113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:07,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:07,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:07:07,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455036768] [2022-11-25 17:07:07,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:07,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:07:07,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:07,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:07:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:07:07,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 182 [2022-11-25 17:07:07,523 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) [2022-11-25 17:07:07,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:07,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 182 [2022-11-25 17:07:07,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:07,965 INFO L130 PetriNetUnfolder]: 416/658 cut-off events. [2022-11-25 17:07:07,965 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2022-11-25 17:07:07,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 658 events. 416/658 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2576 event pairs, 65 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 1127. Up to 373 conditions per place. [2022-11-25 17:07:07,988 INFO L137 encePairwiseOnDemand]: 175/182 looper letters, 52 selfloop transitions, 5 changer transitions 19/77 dead transitions. [2022-11-25 17:07:07,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 360 flow [2022-11-25 17:07:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:07:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:07:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2022-11-25 17:07:08,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5172684458398744 [2022-11-25 17:07:08,023 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2022-11-25 17:07:08,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2022-11-25 17:07:08,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:08,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2022-11-25 17:07:08,042 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) [2022-11-25 17:07:08,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:08,055 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 182.0) internal successors, (1456), 8 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:08,058 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 659 transitions. [2022-11-25 17:07:08,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 360 flow [2022-11-25 17:07:08,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 77 transitions, 324 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:07:08,072 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2022-11-25 17:07:08,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, 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} [2022-11-25 17:07:08,082 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-11-25 17:07:08,082 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2022-11-25 17:07:08,083 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) [2022-11-25 17:07:08,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:08,083 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:08,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:07:08,084 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)] === [2022-11-25 17:07:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117476, now seen corresponding path program 2 times [2022-11-25 17:07:08,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:08,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496596063] [2022-11-25 17:07:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:08,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:08,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496596063] [2022-11-25 17:07:08,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496596063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:08,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:08,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:07:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116851126] [2022-11-25 17:07:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:08,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:07:08,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:07:08,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:07:08,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-11-25 17:07:08,481 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) [2022-11-25 17:07:08,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:08,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-11-25 17:07:08,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:08,721 INFO L130 PetriNetUnfolder]: 268/444 cut-off events. [2022-11-25 17:07:08,722 INFO L131 PetriNetUnfolder]: For 600/616 co-relation queries the response was YES. [2022-11-25 17:07:08,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 444 events. 268/444 cut-off events. For 600/616 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1662 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. [2022-11-25 17:07:08,729 INFO L137 encePairwiseOnDemand]: 178/182 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2022-11-25 17:07:08,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 262 flow [2022-11-25 17:07:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:07:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:07:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2022-11-25 17:07:08,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2022-11-25 17:07:08,733 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 386 transitions. [2022-11-25 17:07:08,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 386 transitions. [2022-11-25 17:07:08,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:08,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 386 transitions. [2022-11-25 17:07:08,736 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) [2022-11-25 17:07:08,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:08,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:08,740 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 386 transitions. [2022-11-25 17:07:08,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 262 flow [2022-11-25 17:07:08,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 247 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 17:07:08,746 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2022-11-25 17:07:08,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, 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} [2022-11-25 17:07:08,747 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2022-11-25 17:07:08,748 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2022-11-25 17:07:08,749 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) [2022-11-25 17:07:08,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:08,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:08,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:07:08,750 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)] === [2022-11-25 17:07:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:08,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1045566162, now seen corresponding path program 3 times [2022-11-25 17:07:08,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:08,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616249230] [2022-11-25 17:07:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:08,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:09,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:09,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616249230] [2022-11-25 17:07:09,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616249230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:09,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:09,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:07:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586747947] [2022-11-25 17:07:09,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:09,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:07:09,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:07:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:07:09,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 182 [2022-11-25 17:07:09,105 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) [2022-11-25 17:07:09,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:09,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 182 [2022-11-25 17:07:09,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:09,290 INFO L130 PetriNetUnfolder]: 199/353 cut-off events. [2022-11-25 17:07:09,290 INFO L131 PetriNetUnfolder]: For 413/430 co-relation queries the response was YES. [2022-11-25 17:07:09,291 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 1225 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. [2022-11-25 17:07:09,294 INFO L137 encePairwiseOnDemand]: 178/182 looper letters, 33 selfloop transitions, 7 changer transitions 2/44 dead transitions. [2022-11-25 17:07:09,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 281 flow [2022-11-25 17:07:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:07:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:07:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 382 transitions. [2022-11-25 17:07:09,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2022-11-25 17:07:09,298 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 382 transitions. [2022-11-25 17:07:09,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 382 transitions. [2022-11-25 17:07:09,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:09,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 382 transitions. [2022-11-25 17:07:09,301 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) [2022-11-25 17:07:09,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:09,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:09,310 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 382 transitions. [2022-11-25 17:07:09,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 281 flow [2022-11-25 17:07:09,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:07:09,319 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2022-11-25 17:07:09,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, 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} [2022-11-25 17:07:09,321 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2022-11-25 17:07:09,322 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2022-11-25 17:07:09,322 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) [2022-11-25 17:07:09,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:09,327 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:07:09,328 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)] === [2022-11-25 17:07:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1999175740, now seen corresponding path program 4 times [2022-11-25 17:07:09,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:09,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908476617] [2022-11-25 17:07:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:09,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:09,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:09,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908476617] [2022-11-25 17:07:09,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908476617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:09,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:09,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:07:09,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2384893] [2022-11-25 17:07:09,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:09,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:07:09,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:09,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:07:09,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:07:09,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 182 [2022-11-25 17:07:09,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:09,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:09,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 182 [2022-11-25 17:07:09,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:09,867 INFO L130 PetriNetUnfolder]: 209/361 cut-off events. [2022-11-25 17:07:09,867 INFO L131 PetriNetUnfolder]: For 631/657 co-relation queries the response was YES. [2022-11-25 17:07:09,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 361 events. 209/361 cut-off events. For 631/657 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1240 event pairs, 22 based on Foata normal form. 26/383 useless extension candidates. Maximal degree in co-relation 1078. Up to 146 conditions per place. [2022-11-25 17:07:09,871 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 38 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2022-11-25 17:07:09,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 338 flow [2022-11-25 17:07:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:07:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:07:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2022-11-25 17:07:09,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5175824175824176 [2022-11-25 17:07:09,875 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2022-11-25 17:07:09,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2022-11-25 17:07:09,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:09,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2022-11-25 17:07:09,877 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) [2022-11-25 17:07:09,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:09,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:09,881 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 471 transitions. [2022-11-25 17:07:09,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 338 flow [2022-11-25 17:07:09,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 328 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 17:07:09,887 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2022-11-25 17:07:09,887 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, 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} [2022-11-25 17:07:09,889 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2022-11-25 17:07:09,889 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2022-11-25 17:07:09,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:09,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:09,890 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:09,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:07:09,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:07:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash 136919696, now seen corresponding path program 5 times [2022-11-25 17:07:09,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:09,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521998473] [2022-11-25 17:07:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:09,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:10,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:10,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521998473] [2022-11-25 17:07:10,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521998473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:07:10,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:07:10,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:07:10,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127179449] [2022-11-25 17:07:10,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:07:10,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:07:10,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:10,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:07:10,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:07:10,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 182 [2022-11-25 17:07:10,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 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) [2022-11-25 17:07:10,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:10,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 182 [2022-11-25 17:07:10,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:10,333 INFO L130 PetriNetUnfolder]: 201/337 cut-off events. [2022-11-25 17:07:10,333 INFO L131 PetriNetUnfolder]: For 1096/1112 co-relation queries the response was YES. [2022-11-25 17:07:10,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 337 events. 201/337 cut-off events. For 1096/1112 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1120 event pairs, 28 based on Foata normal form. 44/380 useless extension candidates. Maximal degree in co-relation 1121. Up to 133 conditions per place. [2022-11-25 17:07:10,337 INFO L137 encePairwiseOnDemand]: 176/182 looper letters, 39 selfloop transitions, 7 changer transitions 4/52 dead transitions. [2022-11-25 17:07:10,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 400 flow [2022-11-25 17:07:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:07:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:07:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2022-11-25 17:07:10,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5175824175824176 [2022-11-25 17:07:10,341 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2022-11-25 17:07:10,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2022-11-25 17:07:10,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:10,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2022-11-25 17:07:10,345 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) [2022-11-25 17:07:10,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:10,351 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:10,351 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 5 states and 471 transitions. [2022-11-25 17:07:10,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 400 flow [2022-11-25 17:07:10,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:07:10,357 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 194 flow [2022-11-25 17:07:10,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2022-11-25 17:07:10,361 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2022-11-25 17:07:10,361 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 194 flow [2022-11-25 17:07:10,362 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) [2022-11-25 17:07:10,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:10,362 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] [2022-11-25 17:07:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:07:10,363 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)] === [2022-11-25 17:07:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1318118550, now seen corresponding path program 1 times [2022-11-25 17:07:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604937817] [2022-11-25 17:07:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:10,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:10,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604937817] [2022-11-25 17:07:10,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604937817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592976585] [2022-11-25 17:07:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:10,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:10,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:10,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:10,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:07:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:07:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:11,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:11,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592976585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:11,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:11,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2022-11-25 17:07:11,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103594506] [2022-11-25 17:07:11,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:11,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:07:11,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:07:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:07:11,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 182 [2022-11-25 17:07:11,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 194 flow. Second operand has 15 states, 15 states have (on average 79.86666666666666) internal successors, (1198), 15 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:11,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:11,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 182 [2022-11-25 17:07:11,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:12,692 INFO L130 PetriNetUnfolder]: 359/603 cut-off events. [2022-11-25 17:07:12,692 INFO L131 PetriNetUnfolder]: For 2482/2519 co-relation queries the response was YES. [2022-11-25 17:07:12,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 603 events. 359/603 cut-off events. For 2482/2519 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2344 event pairs, 10 based on Foata normal form. 45/637 useless extension candidates. Maximal degree in co-relation 1655. Up to 247 conditions per place. [2022-11-25 17:07:12,701 INFO L137 encePairwiseOnDemand]: 175/182 looper letters, 64 selfloop transitions, 18 changer transitions 41/125 dead transitions. [2022-11-25 17:07:12,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 125 transitions, 1037 flow [2022-11-25 17:07:12,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:07:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:07:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1346 transitions. [2022-11-25 17:07:12,707 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46222527472527475 [2022-11-25 17:07:12,707 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1346 transitions. [2022-11-25 17:07:12,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1346 transitions. [2022-11-25 17:07:12,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:12,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1346 transitions. [2022-11-25 17:07:12,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 84.125) internal successors, (1346), 16 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:12,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 182.0) internal successors, (3094), 17 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:12,721 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 182.0) internal successors, (3094), 17 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:12,721 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 194 flow. Second operand 16 states and 1346 transitions. [2022-11-25 17:07:12,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 125 transitions, 1037 flow [2022-11-25 17:07:12,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 125 transitions, 1013 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-25 17:07:12,733 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 333 flow [2022-11-25 17:07:12,733 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=333, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2022-11-25 17:07:12,736 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2022-11-25 17:07:12,737 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 333 flow [2022-11-25 17:07:12,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 79.86666666666666) internal successors, (1198), 15 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:12,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:12,739 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] [2022-11-25 17:07:12,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:12,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:12,946 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)] === [2022-11-25 17:07:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:12,947 INFO L85 PathProgramCache]: Analyzing trace with hash 179138263, now seen corresponding path program 1 times [2022-11-25 17:07:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:12,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094800601] [2022-11-25 17:07:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094800601] [2022-11-25 17:07:13,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094800601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:13,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13398584] [2022-11-25 17:07:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:13,398 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:13,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:07:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:13,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:07:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:13,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:13,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13398584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:13,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:13,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-25 17:07:13,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278453676] [2022-11-25 17:07:13,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:13,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:07:13,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:13,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:07:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:07:14,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 182 [2022-11-25 17:07:14,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 333 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) [2022-11-25 17:07:14,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:14,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 182 [2022-11-25 17:07:14,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:15,025 INFO L130 PetriNetUnfolder]: 485/831 cut-off events. [2022-11-25 17:07:15,026 INFO L131 PetriNetUnfolder]: For 8127/8127 co-relation queries the response was YES. [2022-11-25 17:07:15,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4625 conditions, 831 events. 485/831 cut-off events. For 8127/8127 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3399 event pairs, 16 based on Foata normal form. 40/871 useless extension candidates. Maximal degree in co-relation 3629. Up to 311 conditions per place. [2022-11-25 17:07:15,037 INFO L137 encePairwiseOnDemand]: 175/182 looper letters, 67 selfloop transitions, 21 changer transitions 61/152 dead transitions. [2022-11-25 17:07:15,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 152 transitions, 1590 flow [2022-11-25 17:07:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:07:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:07:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1438 transitions. [2022-11-25 17:07:15,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.464770523594053 [2022-11-25 17:07:15,045 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1438 transitions. [2022-11-25 17:07:15,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1438 transitions. [2022-11-25 17:07:15,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:15,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1438 transitions. [2022-11-25 17:07:15,052 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) [2022-11-25 17:07:15,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 182.0) internal successors, (3276), 18 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:15,062 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 182.0) internal successors, (3276), 18 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:15,062 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 333 flow. Second operand 17 states and 1438 transitions. [2022-11-25 17:07:15,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 152 transitions, 1590 flow [2022-11-25 17:07:15,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 152 transitions, 1311 flow, removed 110 selfloop flow, removed 10 redundant places. [2022-11-25 17:07:15,108 INFO L231 Difference]: Finished difference. Result has 72 places, 48 transitions, 436 flow [2022-11-25 17:07:15,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=436, PETRI_PLACES=72, PETRI_TRANSITIONS=48} [2022-11-25 17:07:15,109 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2022-11-25 17:07:15,110 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 48 transitions, 436 flow [2022-11-25 17:07:15,110 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) [2022-11-25 17:07:15,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:15,111 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:07:15,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:15,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:15,319 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)] === [2022-11-25 17:07:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1011725384, now seen corresponding path program 2 times [2022-11-25 17:07:15,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:15,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312612029] [2022-11-25 17:07:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312612029] [2022-11-25 17:07:16,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312612029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189245042] [2022-11-25 17:07:16,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:07:16,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:16,021 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:16,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:07:16,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:07:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:07:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:07:16,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:16,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:07:16,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189245042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:16,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:16,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 20 [2022-11-25 17:07:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90615729] [2022-11-25 17:07:16,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:16,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:07:16,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:07:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:07:17,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 182 [2022-11-25 17:07:17,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 48 transitions, 436 flow. Second operand has 21 states, 21 states have (on average 79.57142857142857) internal successors, (1671), 21 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:17,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:17,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 182 [2022-11-25 17:07:17,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:19,171 INFO L130 PetriNetUnfolder]: 600/994 cut-off events. [2022-11-25 17:07:19,172 INFO L131 PetriNetUnfolder]: For 14833/14875 co-relation queries the response was YES. [2022-11-25 17:07:19,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6230 conditions, 994 events. 600/994 cut-off events. For 14833/14875 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4094 event pairs, 26 based on Foata normal form. 54/1041 useless extension candidates. Maximal degree in co-relation 5257. Up to 374 conditions per place. [2022-11-25 17:07:19,184 INFO L137 encePairwiseOnDemand]: 175/182 looper letters, 99 selfloop transitions, 47 changer transitions 81/230 dead transitions. [2022-11-25 17:07:19,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 230 transitions, 2810 flow [2022-11-25 17:07:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:07:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 17:07:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2580 transitions. [2022-11-25 17:07:19,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45728465083303793 [2022-11-25 17:07:19,193 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2580 transitions. [2022-11-25 17:07:19,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2580 transitions. [2022-11-25 17:07:19,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:19,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2580 transitions. [2022-11-25 17:07:19,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 83.2258064516129) internal successors, (2580), 31 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:19,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 182.0) internal successors, (5824), 32 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:19,217 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 182.0) internal successors, (5824), 32 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:19,218 INFO L175 Difference]: Start difference. First operand has 72 places, 48 transitions, 436 flow. Second operand 31 states and 2580 transitions. [2022-11-25 17:07:19,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 230 transitions, 2810 flow [2022-11-25 17:07:19,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 230 transitions, 2234 flow, removed 237 selfloop flow, removed 10 redundant places. [2022-11-25 17:07:19,289 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 938 flow [2022-11-25 17:07:19,289 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=938, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2022-11-25 17:07:19,292 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2022-11-25 17:07:19,293 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 938 flow [2022-11-25 17:07:19,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 79.57142857142857) internal successors, (1671), 21 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:19,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:19,294 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] [2022-11-25 17:07:19,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:19,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:19,502 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)] === [2022-11-25 17:07:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:19,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1404291379, now seen corresponding path program 1 times [2022-11-25 17:07:19,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:19,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525674568] [2022-11-25 17:07:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:19,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:19,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525674568] [2022-11-25 17:07:19,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525674568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:19,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879527185] [2022-11-25 17:07:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:19,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:19,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:20,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:07:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:07:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:20,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:21,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879527185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:21,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:21,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-11-25 17:07:21,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793653029] [2022-11-25 17:07:21,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:21,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:07:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:21,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:07:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:07:21,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 182 [2022-11-25 17:07:21,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 938 flow. Second operand has 20 states, 20 states have (on average 71.8) internal successors, (1436), 20 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:21,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:21,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 182 [2022-11-25 17:07:21,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:26,753 INFO L130 PetriNetUnfolder]: 1091/1816 cut-off events. [2022-11-25 17:07:26,754 INFO L131 PetriNetUnfolder]: For 14450/14450 co-relation queries the response was YES. [2022-11-25 17:07:26,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9990 conditions, 1816 events. 1091/1816 cut-off events. For 14450/14450 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8411 event pairs, 5 based on Foata normal form. 80/1896 useless extension candidates. Maximal degree in co-relation 9348. Up to 531 conditions per place. [2022-11-25 17:07:26,782 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 185 selfloop transitions, 129 changer transitions 193/507 dead transitions. [2022-11-25 17:07:26,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 507 transitions, 5457 flow [2022-11-25 17:07:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 17:07:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-25 17:07:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4906 transitions. [2022-11-25 17:07:26,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4147083685545224 [2022-11-25 17:07:26,801 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4906 transitions. [2022-11-25 17:07:26,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4906 transitions. [2022-11-25 17:07:26,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:26,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4906 transitions. [2022-11-25 17:07:26,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 75.47692307692307) internal successors, (4906), 65 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:26,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 182.0) internal successors, (12012), 66 states have internal predecessors, (12012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:26,852 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 182.0) internal successors, (12012), 66 states have internal predecessors, (12012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:26,853 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 938 flow. Second operand 65 states and 4906 transitions. [2022-11-25 17:07:26,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 507 transitions, 5457 flow [2022-11-25 17:07:26,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 507 transitions, 3649 flow, removed 777 selfloop flow, removed 13 redundant places. [2022-11-25 17:07:26,960 INFO L231 Difference]: Finished difference. Result has 149 places, 164 transitions, 1472 flow [2022-11-25 17:07:26,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=1472, PETRI_PLACES=149, PETRI_TRANSITIONS=164} [2022-11-25 17:07:26,962 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2022-11-25 17:07:26,963 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 164 transitions, 1472 flow [2022-11-25 17:07:26,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 71.8) internal successors, (1436), 20 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:26,964 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:26,965 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] [2022-11-25 17:07:26,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:27,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:27,172 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)] === [2022-11-25 17:07:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1083623675, now seen corresponding path program 2 times [2022-11-25 17:07:27,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:27,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892470364] [2022-11-25 17:07:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:27,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:27,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892470364] [2022-11-25 17:07:27,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892470364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:27,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651431098] [2022-11-25 17:07:27,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:07:27,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:27,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:27,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:27,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:07:27,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:07:27,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:07:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:07:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:28,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:28,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651431098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:28,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:28,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 21 [2022-11-25 17:07:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313798953] [2022-11-25 17:07:28,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:28,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:07:28,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:07:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:07:29,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 182 [2022-11-25 17:07:29,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 164 transitions, 1472 flow. Second operand has 22 states, 22 states have (on average 70.72727272727273) internal successors, (1556), 22 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:29,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:29,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 182 [2022-11-25 17:07:29,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:36,590 INFO L130 PetriNetUnfolder]: 1998/3311 cut-off events. [2022-11-25 17:07:36,590 INFO L131 PetriNetUnfolder]: For 22403/22403 co-relation queries the response was YES. [2022-11-25 17:07:36,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17428 conditions, 3311 events. 1998/3311 cut-off events. For 22403/22403 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17008 event pairs, 37 based on Foata normal form. 120/3431 useless extension candidates. Maximal degree in co-relation 16820. Up to 701 conditions per place. [2022-11-25 17:07:36,627 INFO L137 encePairwiseOnDemand]: 173/182 looper letters, 288 selfloop transitions, 309 changer transitions 241/838 dead transitions. [2022-11-25 17:07:36,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 838 transitions, 8432 flow [2022-11-25 17:07:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-25 17:07:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-11-25 17:07:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 7443 transitions. [2022-11-25 17:07:36,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4049069742139049 [2022-11-25 17:07:36,647 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 7443 transitions. [2022-11-25 17:07:36,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 7443 transitions. [2022-11-25 17:07:36,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:36,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 7443 transitions. [2022-11-25 17:07:36,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 73.6930693069307) internal successors, (7443), 101 states have internal predecessors, (7443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:36,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 182.0) internal successors, (18564), 102 states have internal predecessors, (18564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:36,708 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 182.0) internal successors, (18564), 102 states have internal predecessors, (18564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:36,708 INFO L175 Difference]: Start difference. First operand has 149 places, 164 transitions, 1472 flow. Second operand 101 states and 7443 transitions. [2022-11-25 17:07:36,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 838 transitions, 8432 flow [2022-11-25 17:07:37,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 838 transitions, 6737 flow, removed 613 selfloop flow, removed 27 redundant places. [2022-11-25 17:07:37,050 INFO L231 Difference]: Finished difference. Result has 240 places, 380 transitions, 3810 flow [2022-11-25 17:07:37,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=3810, PETRI_PLACES=240, PETRI_TRANSITIONS=380} [2022-11-25 17:07:37,052 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2022-11-25 17:07:37,053 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 380 transitions, 3810 flow [2022-11-25 17:07:37,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 70.72727272727273) internal successors, (1556), 22 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:37,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:37,055 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] [2022-11-25 17:07:37,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:37,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:07:37,262 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)] === [2022-11-25 17:07:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash -908569026, now seen corresponding path program 3 times [2022-11-25 17:07:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:37,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712135887] [2022-11-25 17:07:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:37,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:37,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712135887] [2022-11-25 17:07:37,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712135887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:37,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590324227] [2022-11-25 17:07:37,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:07:37,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:37,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:37,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:37,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:07:38,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:07:38,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:07:38,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:07:38,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:38,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:38,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590324227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:38,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:38,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-11-25 17:07:38,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922149422] [2022-11-25 17:07:38,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:38,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:07:38,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:07:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:07:39,318 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 182 [2022-11-25 17:07:39,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 380 transitions, 3810 flow. Second operand has 22 states, 22 states have (on average 74.5) internal successors, (1639), 22 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:39,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:39,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 182 [2022-11-25 17:07:39,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:07:46,787 INFO L130 PetriNetUnfolder]: 3061/5179 cut-off events. [2022-11-25 17:07:46,787 INFO L131 PetriNetUnfolder]: For 115657/115665 co-relation queries the response was YES. [2022-11-25 17:07:46,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30745 conditions, 5179 events. 3061/5179 cut-off events. For 115657/115665 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 30759 event pairs, 66 based on Foata normal form. 264/5442 useless extension candidates. Maximal degree in co-relation 30635. Up to 1228 conditions per place. [2022-11-25 17:07:46,896 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 387 selfloop transitions, 251 changer transitions 547/1187 dead transitions. [2022-11-25 17:07:46,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1187 transitions, 13699 flow [2022-11-25 17:07:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-25 17:07:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-11-25 17:07:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 7207 transitions. [2022-11-25 17:07:46,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4304228380315337 [2022-11-25 17:07:46,917 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 7207 transitions. [2022-11-25 17:07:46,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 7207 transitions. [2022-11-25 17:07:46,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:07:46,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 7207 transitions. [2022-11-25 17:07:46,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 78.33695652173913) internal successors, (7207), 92 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 182.0) internal successors, (16926), 93 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,976 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 182.0) internal successors, (16926), 93 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:46,977 INFO L175 Difference]: Start difference. First operand has 240 places, 380 transitions, 3810 flow. Second operand 92 states and 7207 transitions. [2022-11-25 17:07:46,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1187 transitions, 13699 flow [2022-11-25 17:07:47,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1187 transitions, 11849 flow, removed 913 selfloop flow, removed 31 redundant places. [2022-11-25 17:07:47,645 INFO L231 Difference]: Finished difference. Result has 315 places, 517 transitions, 5835 flow [2022-11-25 17:07:47,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=3362, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=5835, PETRI_PLACES=315, PETRI_TRANSITIONS=517} [2022-11-25 17:07:47,646 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2022-11-25 17:07:47,647 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 517 transitions, 5835 flow [2022-11-25 17:07:47,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 74.5) internal successors, (1639), 22 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:47,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:07:47,648 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] [2022-11-25 17:07:47,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:07:47,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:07:47,857 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)] === [2022-11-25 17:07:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:07:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash -437184826, now seen corresponding path program 4 times [2022-11-25 17:07:47,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:07:47,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681079309] [2022-11-25 17:07:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:07:47,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:07:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:07:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:48,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:48,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681079309] [2022-11-25 17:07:48,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681079309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:48,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924527437] [2022-11-25 17:07:48,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:07:48,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:07:48,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:07:48,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:07:48,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:07:48,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:07:48,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:07:48,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:07:48,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:07:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:49,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:07:50,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924527437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:07:50,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:07:50,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 13] total 30 [2022-11-25 17:07:50,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166093951] [2022-11-25 17:07:50,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:50,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:07:50,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:07:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:07:50,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 182 [2022-11-25 17:07:50,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 517 transitions, 5835 flow. Second operand has 31 states, 31 states have (on average 70.09677419354838) internal successors, (2173), 31 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:07:50,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:07:50,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 182 [2022-11-25 17:07:50,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:03,423 INFO L130 PetriNetUnfolder]: 4241/7120 cut-off events. [2022-11-25 17:08:03,423 INFO L131 PetriNetUnfolder]: For 184880/184880 co-relation queries the response was YES. [2022-11-25 17:08:03,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51586 conditions, 7120 events. 4241/7120 cut-off events. For 184880/184880 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 43491 event pairs, 52 based on Foata normal form. 250/7370 useless extension candidates. Maximal degree in co-relation 51095. Up to 1346 conditions per place. [2022-11-25 17:08:03,545 INFO L137 encePairwiseOnDemand]: 172/182 looper letters, 583 selfloop transitions, 761 changer transitions 515/1859 dead transitions. [2022-11-25 17:08:03,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1859 transitions, 26510 flow [2022-11-25 17:08:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-11-25 17:08:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2022-11-25 17:08:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 12045 transitions. [2022-11-25 17:08:03,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4035446261056017 [2022-11-25 17:08:03,567 INFO L72 ComplementDD]: Start complementDD. Operand 164 states and 12045 transitions. [2022-11-25 17:08:03,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 164 states and 12045 transitions. [2022-11-25 17:08:03,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:03,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 164 states and 12045 transitions. [2022-11-25 17:08:03,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 165 states, 164 states have (on average 73.4451219512195) internal successors, (12045), 164 states have internal predecessors, (12045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:03,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 165 states, 165 states have (on average 182.0) internal successors, (30030), 165 states have internal predecessors, (30030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:03,636 INFO L81 ComplementDD]: Finished complementDD. Result has 165 states, 165 states have (on average 182.0) internal successors, (30030), 165 states have internal predecessors, (30030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:03,636 INFO L175 Difference]: Start difference. First operand has 315 places, 517 transitions, 5835 flow. Second operand 164 states and 12045 transitions. [2022-11-25 17:08:03,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1859 transitions, 26510 flow [2022-11-25 17:08:04,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1859 transitions, 19979 flow, removed 3232 selfloop flow, removed 54 redundant places. [2022-11-25 17:08:04,613 INFO L231 Difference]: Finished difference. Result has 448 places, 980 transitions, 12799 flow [2022-11-25 17:08:04,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=4918, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=164, PETRI_FLOW=12799, PETRI_PLACES=448, PETRI_TRANSITIONS=980} [2022-11-25 17:08:04,615 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 418 predicate places. [2022-11-25 17:08:04,615 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 980 transitions, 12799 flow [2022-11-25 17:08:04,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 70.09677419354838) internal successors, (2173), 31 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:04,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:04,616 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] [2022-11-25 17:08:04,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 17:08:04,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:04,819 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)] === [2022-11-25 17:08:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:04,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1842878740, now seen corresponding path program 5 times [2022-11-25 17:08:04,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:04,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903848116] [2022-11-25 17:08:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:04,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:05,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:05,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903848116] [2022-11-25 17:08:05,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903848116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:08:05,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637837388] [2022-11-25 17:08:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:08:05,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:05,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:08:05,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:08:05,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:08:05,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 17:08:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:08:05,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:08:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:08:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:06,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:08:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:06,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637837388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:08:06,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:08:06,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-11-25 17:08:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312464443] [2022-11-25 17:08:06,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:08:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:08:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:08:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:08:07,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 182 [2022-11-25 17:08:07,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 980 transitions, 12799 flow. Second operand has 26 states, 26 states have (on average 71.46153846153847) internal successors, (1858), 26 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:07,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:07,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 182 [2022-11-25 17:08:07,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:08:28,814 INFO L130 PetriNetUnfolder]: 8940/14963 cut-off events. [2022-11-25 17:08:28,814 INFO L131 PetriNetUnfolder]: For 431241/431241 co-relation queries the response was YES. [2022-11-25 17:08:29,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115222 conditions, 14963 events. 8940/14963 cut-off events. For 431241/431241 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 103683 event pairs, 79 based on Foata normal form. 260/15223 useless extension candidates. Maximal degree in co-relation 115061. Up to 2620 conditions per place. [2022-11-25 17:08:29,289 INFO L137 encePairwiseOnDemand]: 171/182 looper letters, 930 selfloop transitions, 1727 changer transitions 928/3585 dead transitions. [2022-11-25 17:08:29,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 3585 transitions, 58559 flow [2022-11-25 17:08:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-11-25 17:08:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2022-11-25 17:08:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 14095 transitions. [2022-11-25 17:08:29,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4097621954764812 [2022-11-25 17:08:29,316 INFO L72 ComplementDD]: Start complementDD. Operand 189 states and 14095 transitions. [2022-11-25 17:08:29,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 189 states and 14095 transitions. [2022-11-25 17:08:29,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:08:29,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 189 states and 14095 transitions. [2022-11-25 17:08:29,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 190 states, 189 states have (on average 74.57671957671958) internal successors, (14095), 189 states have internal predecessors, (14095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:29,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 190 states, 190 states have (on average 182.0) internal successors, (34580), 190 states have internal predecessors, (34580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:29,394 INFO L81 ComplementDD]: Finished complementDD. Result has 190 states, 190 states have (on average 182.0) internal successors, (34580), 190 states have internal predecessors, (34580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:29,394 INFO L175 Difference]: Start difference. First operand has 448 places, 980 transitions, 12799 flow. Second operand 189 states and 14095 transitions. [2022-11-25 17:08:29,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 3585 transitions, 58559 flow [2022-11-25 17:08:39,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 3585 transitions, 44452 flow, removed 6492 selfloop flow, removed 67 redundant places. [2022-11-25 17:08:39,487 INFO L231 Difference]: Finished difference. Result has 583 places, 2243 transitions, 32575 flow [2022-11-25 17:08:39,488 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=10706, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=189, PETRI_FLOW=32575, PETRI_PLACES=583, PETRI_TRANSITIONS=2243} [2022-11-25 17:08:39,489 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 553 predicate places. [2022-11-25 17:08:39,489 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2243 transitions, 32575 flow [2022-11-25 17:08:39,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 71.46153846153847) internal successors, (1858), 26 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:39,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:08:39,490 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] [2022-11-25 17:08:39,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 17:08:39,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:39,696 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)] === [2022-11-25 17:08:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash -905725734, now seen corresponding path program 6 times [2022-11-25 17:08:39,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:39,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942635254] [2022-11-25 17:08:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:39,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:40,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:40,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942635254] [2022-11-25 17:08:40,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942635254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:08:40,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358504285] [2022-11-25 17:08:40,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:08:40,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:40,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:08:40,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:08:40,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:08:40,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:08:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:08:40,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:08:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:08:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:40,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:08:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:08:41,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358504285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:08:41,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:08:41,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2022-11-25 17:08:41,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942649907] [2022-11-25 17:08:41,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:08:41,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:08:41,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:41,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:08:41,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:08:41,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 182 [2022-11-25 17:08:41,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2243 transitions, 32575 flow. Second operand has 25 states, 25 states have (on average 74.36) internal successors, (1859), 25 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:08:41,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:08:41,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 182 [2022-11-25 17:08:41,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:09:15,297 INFO L130 PetriNetUnfolder]: 15520/26470 cut-off events. [2022-11-25 17:09:15,297 INFO L131 PetriNetUnfolder]: For 456390/456390 co-relation queries the response was YES. [2022-11-25 17:09:15,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205117 conditions, 26470 events. 15520/26470 cut-off events. For 456390/456390 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 207510 event pairs, 310 based on Foata normal form. 818/27288 useless extension candidates. Maximal degree in co-relation 204662. Up to 4780 conditions per place. [2022-11-25 17:09:15,997 INFO L137 encePairwiseOnDemand]: 174/182 looper letters, 1825 selfloop transitions, 2294 changer transitions 1628/5757 dead transitions. [2022-11-25 17:09:15,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 5757 transitions, 99808 flow [2022-11-25 17:09:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-25 17:09:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2022-11-25 17:09:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 11897 transitions. [2022-11-25 17:09:16,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4300534991324465 [2022-11-25 17:09:16,015 INFO L72 ComplementDD]: Start complementDD. Operand 152 states and 11897 transitions. [2022-11-25 17:09:16,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 152 states and 11897 transitions. [2022-11-25 17:09:16,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:09:16,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 152 states and 11897 transitions. [2022-11-25 17:09:16,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 153 states, 152 states have (on average 78.26973684210526) internal successors, (11897), 152 states have internal predecessors, (11897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:09:16,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 153 states, 153 states have (on average 182.0) internal successors, (27846), 153 states have internal predecessors, (27846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:09:16,075 INFO L81 ComplementDD]: Finished complementDD. Result has 153 states, 153 states have (on average 182.0) internal successors, (27846), 153 states have internal predecessors, (27846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:09:16,076 INFO L175 Difference]: Start difference. First operand has 583 places, 2243 transitions, 32575 flow. Second operand 152 states and 11897 transitions. [2022-11-25 17:09:16,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 5757 transitions, 99808 flow [2022-11-25 17:10:09,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 5757 transitions, 87896 flow, removed 5875 selfloop flow, removed 57 redundant places. [2022-11-25 17:10:09,662 INFO L231 Difference]: Finished difference. Result has 677 places, 3606 transitions, 58993 flow [2022-11-25 17:10:09,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=29989, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=936, PETRI_DIFFERENCE_SUBTRAHEND_STATES=152, PETRI_FLOW=58993, PETRI_PLACES=677, PETRI_TRANSITIONS=3606} [2022-11-25 17:10:09,665 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 647 predicate places. [2022-11-25 17:10:09,666 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 3606 transitions, 58993 flow [2022-11-25 17:10:09,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.36) internal successors, (1859), 25 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:10:09,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:10:09,667 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] [2022-11-25 17:10:09,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:10:09,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:09,868 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)] === [2022-11-25 17:10:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:10:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1159918854, now seen corresponding path program 7 times [2022-11-25 17:10:09,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:10:09,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859830291] [2022-11-25 17:10:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:09,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:10:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:10:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:10:10,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859830291] [2022-11-25 17:10:10,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859830291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:10:10,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120666292] [2022-11-25 17:10:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:10:10,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:10,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:10:10,427 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:10:10,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2883f49-1406-4b84-94cf-755824990269/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:10:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:10,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:10:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:10:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:10:11,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:10:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:10:11,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120666292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:10:11,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:10:11,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2022-11-25 17:10:11,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049930527] [2022-11-25 17:10:11,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:10:11,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:10:11,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:10:11,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:10:11,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:10:12,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 182 [2022-11-25 17:10:12,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 3606 transitions, 58993 flow. Second operand has 27 states, 27 states have (on average 74.25925925925925) internal successors, (2005), 27 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:10:12,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:10:12,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 182 [2022-11-25 17:10:12,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand