./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:34:45,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:34:45,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:34:45,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:34:45,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:34:45,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:34:45,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:34:45,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:34:45,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:34:45,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:34:45,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:34:45,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:34:45,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:34:45,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:34:45,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:34:45,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:34:45,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:34:45,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:34:45,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:34:45,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:34:45,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:34:45,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:34:45,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:34:45,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:34:45,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:34:45,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:34:45,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:34:45,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:34:45,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:34:45,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:34:45,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:34:45,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:34:45,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:34:45,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:34:45,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:34:45,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:34:45,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:34:45,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:34:45,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:34:45,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:34:45,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:34:45,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:34:45,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:34:45,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:34:45,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:34:45,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:34:45,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:34:45,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:34:45,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:34:45,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:34:45,760 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:34:45,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:34:45,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:34:45,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:34:45,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:34:45,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:34:45,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:34:45,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:34:45,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:34:45,761 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:34:45,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:34:45,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:34:45,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:34:45,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:34:45,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:34:45,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:34:45,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:34:45,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:34:45,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:34:45,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:34:45,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:34:45,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:34:45,763 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:34:45,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:34:45,763 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:34:45,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:34:45,764 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:34:45,764 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_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 [2022-12-13 11:34:45,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:34:45,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:34:45,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:34:45,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:34:45,971 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:34:45,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-12-13 11:34:48,640 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:34:48,796 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:34:48,796 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-12-13 11:34:48,805 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/data/dc9cdaaff/0fcdb10af2bd4c5bbbe5308d945fd070/FLAG7c542eccb [2022-12-13 11:34:48,816 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/data/dc9cdaaff/0fcdb10af2bd4c5bbbe5308d945fd070 [2022-12-13 11:34:48,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:34:48,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:34:48,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:34:48,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:34:48,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:34:48,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:34:48" (1/1) ... [2022-12-13 11:34:48,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:48, skipping insertion in model container [2022-12-13 11:34:48,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:34:48" (1/1) ... [2022-12-13 11:34:48,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:34:48,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:34:49,072 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_f74bf795-f64a-49cb-b023-b6577ff0c8a7/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-12-13 11:34:49,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:34:49,089 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:34:49,118 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_f74bf795-f64a-49cb-b023-b6577ff0c8a7/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-12-13 11:34:49,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:34:49,142 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:34:49,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49 WrapperNode [2022-12-13 11:34:49,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:34:49,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:34:49,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:34:49,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:34:49,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,174 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 83 [2022-12-13 11:34:49,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:34:49,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:34:49,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:34:49,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:34:49,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,191 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:34:49,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:34:49,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:34:49,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:34:49,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (1/1) ... [2022-12-13 11:34:49,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:34:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:34:49,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:34:49,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74bf795-f64a-49cb-b023-b6577ff0c8a7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:34:49,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:34:49,245 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 11:34:49,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 11:34:49,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:34:49,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:34:49,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:34:49,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:34:49,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:34:49,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:34:49,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:34:49,247 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:34:49,354 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:34:49,356 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:34:49,489 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:34:49,524 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:34:49,524 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 11:34:49,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:34:49 BoogieIcfgContainer [2022-12-13 11:34:49,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:34:49,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:34:49,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:34:49,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:34:49,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:34:48" (1/3) ... [2022-12-13 11:34:49,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f91d33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:34:49, skipping insertion in model container [2022-12-13 11:34:49,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:34:49" (2/3) ... [2022-12-13 11:34:49,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f91d33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:34:49, skipping insertion in model container [2022-12-13 11:34:49,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:34:49" (3/3) ... [2022-12-13 11:34:49,540 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2022-12-13 11:34:49,546 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:34:49,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:34:49,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:34:49,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:34:49,592 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 11:34:49,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-12-13 11:34:49,649 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-12-13 11:34:49,649 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:34:49,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-12-13 11:34:49,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 79 transitions, 163 flow [2022-12-13 11:34:49,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 79 transitions, 163 flow [2022-12-13 11:34:49,659 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:34:49,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 79 transitions, 163 flow [2022-12-13 11:34:49,670 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 79 transitions, 163 flow [2022-12-13 11:34:49,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-12-13 11:34:49,687 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-12-13 11:34:49,687 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:34:49,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-12-13 11:34:49,689 INFO L119 LiptonReduction]: Number of co-enabled transitions 1316 [2022-12-13 11:34:50,663 INFO L134 LiptonReduction]: Checked pairs total: 1636 [2022-12-13 11:34:50,664 INFO L136 LiptonReduction]: Total number of compositions: 71 [2022-12-13 11:34:50,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:34:50,682 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;@83cbbe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:34:50,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 11:34:50,686 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2022-12-13 11:34:50,686 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:34:50,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:34:50,687 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 11:34:50,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:34:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:34:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash -749500684, now seen corresponding path program 1 times [2022-12-13 11:34:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:34:50,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530038849] [2022-12-13 11:34:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:34:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:34:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:34:50,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:34:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:34:50,822 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:34:50,823 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:34:50,824 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 11:34:50,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 11:34:50,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 11:34:50,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:34:50,827 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 11:34:50,829 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:34:50,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 11:34:50,850 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 11:34:50,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 266 flow [2022-12-13 11:34:50,873 INFO L130 PetriNetUnfolder]: 13/151 cut-off events. [2022-12-13 11:34:50,873 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:34:50,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 13/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 323 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-12-13 11:34:50,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 127 transitions, 266 flow [2022-12-13 11:34:50,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 127 transitions, 266 flow [2022-12-13 11:34:50,876 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:34:50,876 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 127 transitions, 266 flow [2022-12-13 11:34:50,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 127 transitions, 266 flow [2022-12-13 11:34:50,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 266 flow [2022-12-13 11:34:50,895 INFO L130 PetriNetUnfolder]: 13/151 cut-off events. [2022-12-13 11:34:50,895 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 11:34:50,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 13/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 323 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-12-13 11:34:50,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 7144 [2022-12-13 11:34:51,872 INFO L134 LiptonReduction]: Checked pairs total: 18851 [2022-12-13 11:34:51,873 INFO L136 LiptonReduction]: Total number of compositions: 101 [2022-12-13 11:34:51,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:34:51,875 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;@83cbbe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:34:51,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 11:34:51,877 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2022-12-13 11:34:51,877 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:34:51,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:34:51,878 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:34:51,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 11:34:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:34:51,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1237317154, now seen corresponding path program 1 times [2022-12-13 11:34:51,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:34:51,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909206190] [2022-12-13 11:34:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:34:51,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:34:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:34:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:34:51,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:34:51,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909206190] [2022-12-13 11:34:51,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909206190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:34:51,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:34:51,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:34:51,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353045272] [2022-12-13 11:34:51,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:34:51,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:34:51,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:34:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:34:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:34:51,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 228 [2022-12-13 11:34:51,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 112 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:51,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:34:51,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 228 [2022-12-13 11:34:51,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:34:52,066 INFO L130 PetriNetUnfolder]: 378/808 cut-off events. [2022-12-13 11:34:52,066 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-12-13 11:34:52,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1496 conditions, 808 events. 378/808 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4439 event pairs, 332 based on Foata normal form. 24/740 useless extension candidates. Maximal degree in co-relation 1108. Up to 641 conditions per place. [2022-12-13 11:34:52,071 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 24 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2022-12-13 11:34:52,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 144 flow [2022-12-13 11:34:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:34:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 11:34:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 244 transitions. [2022-12-13 11:34:52,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5350877192982456 [2022-12-13 11:34:52,081 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 244 transitions. [2022-12-13 11:34:52,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 244 transitions. [2022-12-13 11:34:52,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:34:52,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 244 transitions. [2022-12-13 11:34:52,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 122.0) internal successors, (244), 2 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:52,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:52,089 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:52,091 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 112 flow. Second operand 2 states and 244 transitions. [2022-12-13 11:34:52,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 144 flow [2022-12-13 11:34:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 142 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 11:34:52,095 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 94 flow [2022-12-13 11:34:52,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-13 11:34:52,099 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2022-12-13 11:34:52,099 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 94 flow [2022-12-13 11:34:52,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:52,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:34:52,099 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 11:34:52,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:34:52,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 11:34:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:34:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash 324776466, now seen corresponding path program 1 times [2022-12-13 11:34:52,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:34:52,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748502255] [2022-12-13 11:34:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:34:52,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:34:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:34:52,115 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:34:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:34:52,126 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:34:52,126 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:34:52,126 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 11:34:52,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 11:34:52,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 11:34:52,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 11:34:52,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:34:52,127 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 11:34:52,127 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:34:52,127 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 11:34:52,150 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 11:34:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 175 transitions, 371 flow [2022-12-13 11:34:52,172 INFO L130 PetriNetUnfolder]: 19/212 cut-off events. [2022-12-13 11:34:52,173 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 11:34:52,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 212 events. 19/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 598 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-12-13 11:34:52,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 175 transitions, 371 flow [2022-12-13 11:34:52,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 175 transitions, 371 flow [2022-12-13 11:34:52,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:34:52,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 175 transitions, 371 flow [2022-12-13 11:34:52,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 175 transitions, 371 flow [2022-12-13 11:34:52,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 175 transitions, 371 flow [2022-12-13 11:34:52,210 INFO L130 PetriNetUnfolder]: 19/212 cut-off events. [2022-12-13 11:34:52,210 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 11:34:52,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 212 events. 19/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 598 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-12-13 11:34:52,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 17484 [2022-12-13 11:34:53,376 INFO L134 LiptonReduction]: Checked pairs total: 42572 [2022-12-13 11:34:53,377 INFO L136 LiptonReduction]: Total number of compositions: 133 [2022-12-13 11:34:53,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:34:53,379 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;@83cbbe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:34:53,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 11:34:53,382 INFO L130 PetriNetUnfolder]: 1/28 cut-off events. [2022-12-13 11:34:53,382 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 11:34:53,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:34:53,382 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:34:53,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 11:34:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:34:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash -438749574, now seen corresponding path program 1 times [2022-12-13 11:34:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:34:53,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228806488] [2022-12-13 11:34:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:34:53,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:34:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:34:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:34:53,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:34:53,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228806488] [2022-12-13 11:34:53,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228806488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:34:53,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:34:53,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:34:53,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948201211] [2022-12-13 11:34:53,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:34:53,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:34:53,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:34:53,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:34:53,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:34:53,452 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 308 [2022-12-13 11:34:53,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:53,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:34:53,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 308 [2022-12-13 11:34:53,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:34:54,972 INFO L130 PetriNetUnfolder]: 11320/16859 cut-off events. [2022-12-13 11:34:54,972 INFO L131 PetriNetUnfolder]: For 1033/1033 co-relation queries the response was YES. [2022-12-13 11:34:55,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32998 conditions, 16859 events. 11320/16859 cut-off events. For 1033/1033 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 112317 event pairs, 8843 based on Foata normal form. 366/14887 useless extension candidates. Maximal degree in co-relation 8396. Up to 14112 conditions per place. [2022-12-13 11:34:55,077 INFO L137 encePairwiseOnDemand]: 302/308 looper letters, 68 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2022-12-13 11:34:55,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 355 flow [2022-12-13 11:34:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:34:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:34:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2022-12-13 11:34:55,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5443722943722944 [2022-12-13 11:34:55,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2022-12-13 11:34:55,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2022-12-13 11:34:55,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:34:55,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2022-12-13 11:34:55,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:55,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:55,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:55,084 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 159 flow. Second operand 3 states and 503 transitions. [2022-12-13 11:34:55,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 355 flow [2022-12-13 11:34:55,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 347 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 11:34:55,087 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 145 flow [2022-12-13 11:34:55,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2022-12-13 11:34:55,088 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -2 predicate places. [2022-12-13 11:34:55,088 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 145 flow [2022-12-13 11:34:55,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:55,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:34:55,088 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:34:55,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:34:55,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 11:34:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:34:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1776681011, now seen corresponding path program 1 times [2022-12-13 11:34:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:34:55,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382604978] [2022-12-13 11:34:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:34:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:34:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:34:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:34:55,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:34:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382604978] [2022-12-13 11:34:55,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382604978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:34:55,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:34:55,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:34:55,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422277202] [2022-12-13 11:34:55,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:34:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:34:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:34:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:34:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:34:55,139 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 308 [2022-12-13 11:34:55,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:55,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:34:55,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 308 [2022-12-13 11:34:55,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:34:56,443 INFO L130 PetriNetUnfolder]: 10979/16358 cut-off events. [2022-12-13 11:34:56,444 INFO L131 PetriNetUnfolder]: For 856/856 co-relation queries the response was YES. [2022-12-13 11:34:56,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32313 conditions, 16358 events. 10979/16358 cut-off events. For 856/856 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 107811 event pairs, 8910 based on Foata normal form. 336/14761 useless extension candidates. Maximal degree in co-relation 29267. Up to 13900 conditions per place. [2022-12-13 11:34:56,502 INFO L137 encePairwiseOnDemand]: 306/308 looper letters, 64 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2022-12-13 11:34:56,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 330 flow [2022-12-13 11:34:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:34:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:34:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2022-12-13 11:34:56,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2022-12-13 11:34:56,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2022-12-13 11:34:56,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2022-12-13 11:34:56,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:34:56,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2022-12-13 11:34:56,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:56,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:56,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:56,508 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 145 flow. Second operand 3 states and 501 transitions. [2022-12-13 11:34:56,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 330 flow [2022-12-13 11:34:56,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:34:56,510 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 144 flow [2022-12-13 11:34:56,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2022-12-13 11:34:56,511 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2022-12-13 11:34:56,511 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 144 flow [2022-12-13 11:34:56,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:56,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:34:56,511 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 11:34:56,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:34:56,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 11:34:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:34:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1540291980, now seen corresponding path program 1 times [2022-12-13 11:34:56,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:34:56,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739610098] [2022-12-13 11:34:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:34:56,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:34:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:34:56,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:34:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:34:56,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:34:56,532 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:34:56,532 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 11:34:56,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 11:34:56,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 11:34:56,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 11:34:56,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 11:34:56,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:34:56,533 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 11:34:56,534 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:34:56,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 11:34:56,563 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 11:34:56,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 223 transitions, 478 flow [2022-12-13 11:34:56,588 INFO L130 PetriNetUnfolder]: 25/273 cut-off events. [2022-12-13 11:34:56,588 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 11:34:56,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 273 events. 25/273 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 884 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 220. Up to 10 conditions per place. [2022-12-13 11:34:56,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 223 transitions, 478 flow [2022-12-13 11:34:56,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 223 transitions, 478 flow [2022-12-13 11:34:56,591 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:34:56,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 223 transitions, 478 flow [2022-12-13 11:34:56,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 223 transitions, 478 flow [2022-12-13 11:34:56,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 223 transitions, 478 flow [2022-12-13 11:34:56,613 INFO L130 PetriNetUnfolder]: 25/273 cut-off events. [2022-12-13 11:34:56,613 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 11:34:56,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 273 events. 25/273 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 884 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 220. Up to 10 conditions per place. [2022-12-13 11:34:56,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 32336 [2022-12-13 11:34:58,150 INFO L134 LiptonReduction]: Checked pairs total: 81589 [2022-12-13 11:34:58,150 INFO L136 LiptonReduction]: Total number of compositions: 170 [2022-12-13 11:34:58,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:34:58,153 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;@83cbbe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:34:58,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 11:34:58,156 INFO L130 PetriNetUnfolder]: 2/30 cut-off events. [2022-12-13 11:34:58,156 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 11:34:58,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:34:58,156 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:34:58,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 11:34:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:34:58,157 INFO L85 PathProgramCache]: Analyzing trace with hash -981857271, now seen corresponding path program 1 times [2022-12-13 11:34:58,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:34:58,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188666863] [2022-12-13 11:34:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:34:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:34:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:34:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:34:58,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:34:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188666863] [2022-12-13 11:34:58,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188666863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:34:58,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:34:58,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:34:58,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475588681] [2022-12-13 11:34:58,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:34:58,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:34:58,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:34:58,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:34:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:34:58,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 393 [2022-12-13 11:34:58,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:34:58,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:34:58,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 393 [2022-12-13 11:34:58,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:14,882 INFO L130 PetriNetUnfolder]: 175493/239175 cut-off events. [2022-12-13 11:35:14,882 INFO L131 PetriNetUnfolder]: For 19810/19810 co-relation queries the response was YES. [2022-12-13 11:35:15,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470718 conditions, 239175 events. 175493/239175 cut-off events. For 19810/19810 co-relation queries the response was YES. Maximal size of possible extension queue 6474. Compared 1835608 event pairs, 121684 based on Foata normal form. 8788/208376 useless extension candidates. Maximal degree in co-relation 34409. Up to 180623 conditions per place. [2022-12-13 11:35:16,123 INFO L137 encePairwiseOnDemand]: 383/393 looper letters, 92 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-12-13 11:35:16,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 493 flow [2022-12-13 11:35:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2022-12-13 11:35:16,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5589482612383376 [2022-12-13 11:35:16,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2022-12-13 11:35:16,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2022-12-13 11:35:16,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:16,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2022-12-13 11:35:16,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:16,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:16,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:16,136 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 220 flow. Second operand 3 states and 659 transitions. [2022-12-13 11:35:16,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 493 flow [2022-12-13 11:35:16,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 126 transitions, 475 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-12-13 11:35:16,155 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 194 flow [2022-12-13 11:35:16,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2022-12-13 11:35:16,156 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, -4 predicate places. [2022-12-13 11:35:16,156 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 194 flow [2022-12-13 11:35:16,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:16,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:16,157 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:35:16,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:35:16,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 11:35:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:16,157 INFO L85 PathProgramCache]: Analyzing trace with hash -511267962, now seen corresponding path program 1 times [2022-12-13 11:35:16,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:35:16,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545485206] [2022-12-13 11:35:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:16,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:35:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:35:16,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:35:16,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545485206] [2022-12-13 11:35:16,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545485206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:16,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:16,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:35:16,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507841268] [2022-12-13 11:35:16,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:16,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:35:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:35:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:35:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:35:16,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 393 [2022-12-13 11:35:16,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:16,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:16,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 393 [2022-12-13 11:35:16,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:32,548 INFO L130 PetriNetUnfolder]: 171581/233590 cut-off events. [2022-12-13 11:35:32,548 INFO L131 PetriNetUnfolder]: For 9867/9867 co-relation queries the response was YES. [2022-12-13 11:35:32,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465610 conditions, 233590 events. 171581/233590 cut-off events. For 9867/9867 co-relation queries the response was YES. Maximal size of possible extension queue 5823. Compared 1763120 event pairs, 137275 based on Foata normal form. 4026/202321 useless extension candidates. Maximal degree in co-relation 382421. Up to 199234 conditions per place. [2022-12-13 11:35:33,857 INFO L137 encePairwiseOnDemand]: 391/393 looper letters, 89 selfloop transitions, 1 changer transitions 0/122 dead transitions. [2022-12-13 11:35:33,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 122 transitions, 462 flow [2022-12-13 11:35:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2022-12-13 11:35:33,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5453774385072095 [2022-12-13 11:35:33,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2022-12-13 11:35:33,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2022-12-13 11:35:33,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:33,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2022-12-13 11:35:33,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:33,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:33,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:33,865 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 194 flow. Second operand 3 states and 643 transitions. [2022-12-13 11:35:33,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 122 transitions, 462 flow [2022-12-13 11:35:33,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 122 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:33,882 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 192 flow [2022-12-13 11:35:33,882 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2022-12-13 11:35:33,883 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2022-12-13 11:35:33,883 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 192 flow [2022-12-13 11:35:33,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:33,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:33,884 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:35:33,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 11:35:33,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 11:35:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash 534969715, now seen corresponding path program 1 times [2022-12-13 11:35:33,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:35:33,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552249248] [2022-12-13 11:35:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:33,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:35:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 11:35:33,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:35:33,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552249248] [2022-12-13 11:35:33,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552249248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:33,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:33,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:35:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733464849] [2022-12-13 11:35:33,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:33,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:35:33,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:35:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:35:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:35:33,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 393 [2022-12-13 11:35:33,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:33,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:33,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 393 [2022-12-13 11:35:33,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:35:48,891 INFO L130 PetriNetUnfolder]: 167137/227045 cut-off events. [2022-12-13 11:35:48,891 INFO L131 PetriNetUnfolder]: For 9471/9471 co-relation queries the response was YES. [2022-12-13 11:35:49,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459235 conditions, 227045 events. 167137/227045 cut-off events. For 9471/9471 co-relation queries the response was YES. Maximal size of possible extension queue 5405. Compared 1697146 event pairs, 138282 based on Foata normal form. 3696/195584 useless extension candidates. Maximal degree in co-relation 417175. Up to 197199 conditions per place. [2022-12-13 11:35:50,296 INFO L137 encePairwiseOnDemand]: 391/393 looper letters, 85 selfloop transitions, 1 changer transitions 0/118 dead transitions. [2022-12-13 11:35:50,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 441 flow [2022-12-13 11:35:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:35:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:35:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2022-12-13 11:35:50,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5419847328244275 [2022-12-13 11:35:50,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2022-12-13 11:35:50,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2022-12-13 11:35:50,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:35:50,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2022-12-13 11:35:50,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:50,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:50,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:50,302 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 192 flow. Second operand 3 states and 639 transitions. [2022-12-13 11:35:50,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 441 flow [2022-12-13 11:35:50,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:35:50,326 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 191 flow [2022-12-13 11:35:50,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2022-12-13 11:35:50,327 INFO L288 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2022-12-13 11:35:50,327 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 191 flow [2022-12-13 11:35:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:50,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:50,328 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:35:50,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:35:50,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 11:35:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:50,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1824261859, now seen corresponding path program 1 times [2022-12-13 11:35:50,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:35:50,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812195669] [2022-12-13 11:35:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:50,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:35:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:35:50,339 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:35:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:35:50,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:35:50,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:35:50,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 11:35:50,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 11:35:50,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 11:35:50,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 11:35:50,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 11:35:50,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 11:35:50,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 11:35:50,348 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 11:35:50,349 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:35:50,349 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 11:35:50,376 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 11:35:50,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 271 transitions, 587 flow [2022-12-13 11:35:50,413 INFO L130 PetriNetUnfolder]: 31/334 cut-off events. [2022-12-13 11:35:50,413 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 11:35:50,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 334 events. 31/334 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1143 event pairs, 0 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 286. Up to 12 conditions per place. [2022-12-13 11:35:50,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 271 transitions, 587 flow [2022-12-13 11:35:50,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 271 transitions, 587 flow [2022-12-13 11:35:50,417 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:35:50,417 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 271 transitions, 587 flow [2022-12-13 11:35:50,418 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 271 transitions, 587 flow [2022-12-13 11:35:50,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 271 transitions, 587 flow [2022-12-13 11:35:50,453 INFO L130 PetriNetUnfolder]: 31/334 cut-off events. [2022-12-13 11:35:50,453 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 11:35:50,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 334 events. 31/334 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1143 event pairs, 0 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 286. Up to 12 conditions per place. [2022-12-13 11:35:50,466 INFO L119 LiptonReduction]: Number of co-enabled transitions 51700 [2022-12-13 11:35:52,460 INFO L134 LiptonReduction]: Checked pairs total: 129030 [2022-12-13 11:35:52,460 INFO L136 LiptonReduction]: Total number of compositions: 203 [2022-12-13 11:35:52,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:35:52,462 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;@83cbbe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:35:52,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 11:35:52,465 INFO L130 PetriNetUnfolder]: 1/25 cut-off events. [2022-12-13 11:35:52,465 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:35:52,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:35:52,465 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:35:52,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 11:35:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:35:52,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1973060894, now seen corresponding path program 1 times [2022-12-13 11:35:52,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:35:52,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302471855] [2022-12-13 11:35:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:35:52,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:35:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:35:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:35:52,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:35:52,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302471855] [2022-12-13 11:35:52,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302471855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:35:52,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:35:52,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:35:52,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490860515] [2022-12-13 11:35:52,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:35:52,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:35:52,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:35:52,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:35:52,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:35:52,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 474 [2022-12-13 11:35:52,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:35:52,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:35:52,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 474 [2022-12-13 11:35:52,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand