./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --- 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-4e7fbc6 [2022-11-23 14:24:41,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:24:41,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:24:41,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:24:41,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:24:41,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:24:41,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:24:41,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:24:41,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:24:41,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:24:41,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:24:41,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:24:41,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:24:41,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:24:41,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:24:41,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:24:41,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:24:41,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:24:41,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:24:41,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:24:41,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:24:41,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:24:41,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:24:41,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:24:41,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:24:41,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:24:41,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:24:41,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:24:41,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:24:41,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:24:41,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:24:41,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:24:41,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:24:41,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:24:41,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:24:41,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:24:41,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:24:41,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:24:41,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:24:41,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:24:41,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:24:41,778 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:24:41,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:24:41,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:24:41,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:24:41,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:24:41,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:24:41,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:24:41,806 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:24:41,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:24:41,807 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:24:41,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:24:41,807 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:24:41,808 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:24:41,808 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:24:41,808 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:24:41,808 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:24:41,809 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:24:41,809 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:24:41,809 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:24:41,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:24:41,810 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:24:41,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:24:41,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:24:41,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:24:41,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:24:41,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:24:41,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:24:41,812 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:24:41,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:24:41,813 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:24:41,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:24:41,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:24:41,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:24:41,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:24:41,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:24:41,815 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:24:41,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:24:41,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:24:41,816 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:24:41,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:24:41,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:24:41,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:24:41,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 [2022-11-23 14:24:42,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:24:42,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:24:42,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:24:42,177 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:24:42,179 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:24:42,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2022-11-23 14:24:45,296 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:24:45,701 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:24:45,701 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2022-11-23 14:24:45,714 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/data/4366e158e/8e5cfe6d8dbb4d4e8c598a66fb1172fd/FLAGb539d9332 [2022-11-23 14:24:45,738 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/data/4366e158e/8e5cfe6d8dbb4d4e8c598a66fb1172fd [2022-11-23 14:24:45,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:24:45,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:24:45,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:24:45,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:24:45,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:24:45,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:24:45" (1/1) ... [2022-11-23 14:24:45,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d24dda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:45, skipping insertion in model container [2022-11-23 14:24:45,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:24:45" (1/1) ... [2022-11-23 14:24:45,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:24:45,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:24:46,258 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_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2022-11-23 14:24:46,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:24:46,288 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:24:46,348 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_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2022-11-23 14:24:46,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:24:46,401 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:24:46,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46 WrapperNode [2022-11-23 14:24:46,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:24:46,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:24:46,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:24:46,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:24:46,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,473 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 59 [2022-11-23 14:24:46,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:24:46,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:24:46,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:24:46,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:24:46,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:24:46,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:24:46,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:24:46,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:24:46,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (1/1) ... [2022-11-23 14:24:46,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:24:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:46,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:24:46,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b15dc4b8-ed17-4ea2-beb7-3e7a7a8264cf/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:24:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-23 14:24:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-23 14:24:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:24:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:24:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:24:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:24:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:24:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:24:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:24:46,633 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 14:24:46,801 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:24:46,804 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:24:46,988 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:24:47,021 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:24:47,021 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:24:47,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:47 BoogieIcfgContainer [2022-11-23 14:24:47,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:24:47,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:24:47,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:24:47,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:24:47,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:24:45" (1/3) ... [2022-11-23 14:24:47,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d21ef37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:24:47, skipping insertion in model container [2022-11-23 14:24:47,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:46" (2/3) ... [2022-11-23 14:24:47,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d21ef37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:24:47, skipping insertion in model container [2022-11-23 14:24:47,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:47" (3/3) ... [2022-11-23 14:24:47,035 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2022-11-23 14:24:47,044 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 14:24:47,055 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:24:47,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:24:47,056 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 14:24:47,101 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:24:47,138 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:24:47,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 56 transitions, 117 flow [2022-11-23 14:24:47,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 56 transitions, 117 flow [2022-11-23 14:24:47,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 117 flow [2022-11-23 14:24:47,201 INFO L130 PetriNetUnfolder]: 6/67 cut-off events. [2022-11-23 14:24:47,201 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 14:24:47,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 67 events. 6/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 40. Up to 4 conditions per place. [2022-11-23 14:24:47,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2022-11-23 14:24:49,887 INFO L134 LiptonReduction]: Checked pairs total: 578 [2022-11-23 14:24:49,888 INFO L136 LiptonReduction]: Total number of compositions: 55 [2022-11-23 14:24:49,896 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 8 transitions, 21 flow [2022-11-23 14:24:49,908 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:49,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:24:49,933 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=FINITE_AUTOMATA, 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;@645ae0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:24:49,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 14:24:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:24:49,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:49,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:24:49,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash 9127753, now seen corresponding path program 1 times [2022-11-23 14:24:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:49,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831822500] [2022-11-23 14:24:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:49,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:50,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:50,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831822500] [2022-11-23 14:24:50,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831822500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:50,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:50,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:24:50,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897379393] [2022-11-23 14:24:50,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:50,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:24:50,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:24:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:24:50,200 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:50,233 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2022-11-23 14:24:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:24:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:24:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:50,244 INFO L225 Difference]: With dead ends: 11 [2022-11-23 14:24:50,244 INFO L226 Difference]: Without dead ends: 11 [2022-11-23 14:24:50,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:24:50,250 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:50,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-23 14:24:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-23 14:24:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:50,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-23 14:24:50,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 4 [2022-11-23 14:24:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:50,280 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-23 14:24:50,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-23 14:24:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:24:50,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:50,282 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 14:24:50,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:24:50,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:50,283 INFO L85 PathProgramCache]: Analyzing trace with hash 181804696, now seen corresponding path program 1 times [2022-11-23 14:24:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:50,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490810776] [2022-11-23 14:24:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:50,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:50,313 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:24:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:50,348 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:24:50,348 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:24:50,350 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-23 14:24:50,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-23 14:24:50,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-23 14:24:50,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:24:50,355 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 14:24:50,366 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:24:50,367 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 14:24:50,402 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:24:50,411 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:24:50,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2022-11-23 14:24:50,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2022-11-23 14:24:50,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2022-11-23 14:24:50,462 INFO L130 PetriNetUnfolder]: 11/108 cut-off events. [2022-11-23 14:24:50,462 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 14:24:50,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 181 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 68. Up to 6 conditions per place. [2022-11-23 14:24:50,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 3024 [2022-11-23 14:24:53,504 INFO L134 LiptonReduction]: Checked pairs total: 2784 [2022-11-23 14:24:53,504 INFO L136 LiptonReduction]: Total number of compositions: 88 [2022-11-23 14:24:53,506 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 15 transitions, 42 flow [2022-11-23 14:24:53,528 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 117 states, 106 states have (on average 2.641509433962264) internal successors, (280), 116 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:53,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:24:53,535 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=FINITE_AUTOMATA, 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;@645ae0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:24:53,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 14:24:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 106 states have (on average 2.641509433962264) internal successors, (280), 116 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:24:53,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:53,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:24:53,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:24:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash 15210463, now seen corresponding path program 1 times [2022-11-23 14:24:53,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:53,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23172054] [2022-11-23 14:24:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:53,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:53,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23172054] [2022-11-23 14:24:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23172054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:53,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:53,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:24:53,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271124584] [2022-11-23 14:24:53,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:53,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:24:53,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:53,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:24:53,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:24:53,621 INFO L87 Difference]: Start difference. First operand has 117 states, 106 states have (on average 2.641509433962264) internal successors, (280), 116 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:53,638 INFO L93 Difference]: Finished difference Result 60 states and 119 transitions. [2022-11-23 14:24:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:24:53,639 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:24:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:53,640 INFO L225 Difference]: With dead ends: 60 [2022-11-23 14:24:53,640 INFO L226 Difference]: Without dead ends: 60 [2022-11-23 14:24:53,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:24:53,642 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:53,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-23 14:24:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-23 14:24:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2022-11-23 14:24:53,652 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 4 [2022-11-23 14:24:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:53,653 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2022-11-23 14:24:53,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2022-11-23 14:24:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:24:53,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:53,654 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 14:24:53,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:24:53,655 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)] === [2022-11-23 14:24:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash -25501389, now seen corresponding path program 1 times [2022-11-23 14:24:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:53,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734429862] [2022-11-23 14:24:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:53,675 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:24:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:53,692 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:24:53,692 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:24:53,692 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-23 14:24:53,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-23 14:24:53,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-23 14:24:53,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-23 14:24:53,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:24:53,694 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 14:24:53,694 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:24:53,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 14:24:53,717 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:24:53,720 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:24:53,720 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 112 transitions, 245 flow [2022-11-23 14:24:53,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 112 transitions, 245 flow [2022-11-23 14:24:53,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 112 transitions, 245 flow [2022-11-23 14:24:53,753 INFO L130 PetriNetUnfolder]: 16/149 cut-off events. [2022-11-23 14:24:53,753 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 14:24:53,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 149 events. 16/149 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 331 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2022-11-23 14:24:53,760 INFO L119 LiptonReduction]: Number of co-enabled transitions 6804 [2022-11-23 14:24:58,199 INFO L134 LiptonReduction]: Checked pairs total: 6490 [2022-11-23 14:24:58,199 INFO L136 LiptonReduction]: Total number of compositions: 120 [2022-11-23 14:24:58,201 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 18 transitions, 57 flow [2022-11-23 14:24:58,242 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 484 states, 459 states have (on average 3.0784313725490198) internal successors, (1413), 483 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:58,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:24:58,248 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=FINITE_AUTOMATA, 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;@645ae0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:24:58,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 14:24:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 484 states, 459 states have (on average 3.0784313725490198) internal successors, (1413), 483 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:24:58,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:58,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:24:58,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 14:24:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash 23170036, now seen corresponding path program 1 times [2022-11-23 14:24:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:58,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851458888] [2022-11-23 14:24:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:58,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:58,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851458888] [2022-11-23 14:24:58,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851458888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:58,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:58,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:24:58,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92372941] [2022-11-23 14:24:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:58,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:24:58,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:24:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:24:58,310 INFO L87 Difference]: Start difference. First operand has 484 states, 459 states have (on average 3.0784313725490198) internal successors, (1413), 483 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:58,343 INFO L93 Difference]: Finished difference Result 186 states and 485 transitions. [2022-11-23 14:24:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:24:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:24:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:58,354 INFO L225 Difference]: With dead ends: 186 [2022-11-23 14:24:58,354 INFO L226 Difference]: Without dead ends: 186 [2022-11-23 14:24:58,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:24:58,355 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:58,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-23 14:24:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-11-23 14:24:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.6216216216216215) internal successors, (485), 185 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 485 transitions. [2022-11-23 14:24:58,396 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 485 transitions. Word has length 4 [2022-11-23 14:24:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:58,397 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 485 transitions. [2022-11-23 14:24:58,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 485 transitions. [2022-11-23 14:24:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:24:58,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:58,402 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 14:24:58,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:24:58,403 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-23 14:24:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:58,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1022067333, now seen corresponding path program 1 times [2022-11-23 14:24:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:58,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19071206] [2022-11-23 14:24:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:58,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:24:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:58,459 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:24:58,463 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:24:58,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-23 14:24:58,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-23 14:24:58,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-23 14:24:58,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-23 14:24:58,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-23 14:24:58,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:24:58,466 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 14:24:58,467 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:24:58,467 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-23 14:24:58,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:24:58,513 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:24:58,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 140 transitions, 312 flow [2022-11-23 14:24:58,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 140 transitions, 312 flow [2022-11-23 14:24:58,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 140 transitions, 312 flow [2022-11-23 14:24:58,573 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2022-11-23 14:24:58,573 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 14:24:58,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 488 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 157. Up to 10 conditions per place. [2022-11-23 14:24:58,587 INFO L119 LiptonReduction]: Number of co-enabled transitions 12096 [2022-11-23 14:25:03,588 INFO L134 LiptonReduction]: Checked pairs total: 11250 [2022-11-23 14:25:03,588 INFO L136 LiptonReduction]: Total number of compositions: 153 [2022-11-23 14:25:03,589 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 78 flow [2022-11-23 14:25:03,669 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1955 states, 1903 states have (on average 4.001050972149238) internal successors, (7614), 1954 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:03,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:25:03,671 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=FINITE_AUTOMATA, 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;@645ae0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:25:03,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 14:25:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 1955 states, 1903 states have (on average 4.001050972149238) internal successors, (7614), 1954 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:25:03,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:03,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:25:03,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 14:25:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash 33033344, now seen corresponding path program 1 times [2022-11-23 14:25:03,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:03,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640352809] [2022-11-23 14:25:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:03,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:25:03,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:03,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640352809] [2022-11-23 14:25:03,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640352809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:03,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:25:03,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:25:03,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229829713] [2022-11-23 14:25:03,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:03,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:25:03,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:25:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:25:03,740 INFO L87 Difference]: Start difference. First operand has 1955 states, 1903 states have (on average 4.001050972149238) internal successors, (7614), 1954 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:03,793 INFO L93 Difference]: Finished difference Result 564 states and 1835 transitions. [2022-11-23 14:25:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:25:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:25:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:03,805 INFO L225 Difference]: With dead ends: 564 [2022-11-23 14:25:03,805 INFO L226 Difference]: Without dead ends: 564 [2022-11-23 14:25:03,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:25:03,807 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:25:03,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:25:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-23 14:25:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-11-23 14:25:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 3.2593250444049735) internal successors, (1835), 563 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1835 transitions. [2022-11-23 14:25:03,866 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1835 transitions. Word has length 4 [2022-11-23 14:25:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:03,866 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 1835 transitions. [2022-11-23 14:25:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1835 transitions. [2022-11-23 14:25:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 14:25:03,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:03,878 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 14:25:03,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:25:03,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-23 14:25:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:03,879 INFO L85 PathProgramCache]: Analyzing trace with hash -976930677, now seen corresponding path program 1 times [2022-11-23 14:25:03,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:03,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485433407] [2022-11-23 14:25:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:03,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:25:03,914 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:25:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:25:03,927 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:25:03,928 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:25:03,928 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-23 14:25:03,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-23 14:25:03,928 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-23 14:25:03,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-23 14:25:03,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-23 14:25:03,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-23 14:25:03,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:25:03,930 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 14:25:03,930 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:25:03,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-23 14:25:03,963 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:25:03,967 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:25:03,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 168 transitions, 381 flow [2022-11-23 14:25:03,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 168 transitions, 381 flow [2022-11-23 14:25:03,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 168 transitions, 381 flow [2022-11-23 14:25:04,024 INFO L130 PetriNetUnfolder]: 26/231 cut-off events. [2022-11-23 14:25:04,024 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-23 14:25:04,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 231 events. 26/231 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 622 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 203. Up to 12 conditions per place. [2022-11-23 14:25:04,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 18900 [2022-11-23 14:25:10,204 INFO L134 LiptonReduction]: Checked pairs total: 18889 [2022-11-23 14:25:10,204 INFO L136 LiptonReduction]: Total number of compositions: 186 [2022-11-23 14:25:10,205 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 28 transitions, 101 flow [2022-11-23 14:25:10,606 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7842 states, 7738 states have (on average 4.911605065908503) internal successors, (38006), 7841 states have internal predecessors, (38006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:10,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:25:10,607 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=FINITE_AUTOMATA, 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;@645ae0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:25:10,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-23 14:25:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 7842 states, 7738 states have (on average 4.911605065908503) internal successors, (38006), 7841 states have internal predecessors, (38006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:25:10,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:10,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:25:10,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-23 14:25:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:10,630 INFO L85 PathProgramCache]: Analyzing trace with hash 44700481, now seen corresponding path program 1 times [2022-11-23 14:25:10,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:10,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88882317] [2022-11-23 14:25:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:10,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:25:10,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:10,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88882317] [2022-11-23 14:25:10,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88882317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:10,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:25:10,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:25:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788908279] [2022-11-23 14:25:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:25:10,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:25:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:25:10,680 INFO L87 Difference]: Start difference. First operand has 7842 states, 7738 states have (on average 4.911605065908503) internal successors, (38006), 7841 states have internal predecessors, (38006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:10,735 INFO L93 Difference]: Finished difference Result 1698 states and 6641 transitions. [2022-11-23 14:25:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:25:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:25:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:10,827 INFO L225 Difference]: With dead ends: 1698 [2022-11-23 14:25:10,828 INFO L226 Difference]: Without dead ends: 1698 [2022-11-23 14:25:10,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:25:10,829 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:25:10,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:25:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-11-23 14:25:10,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1698. [2022-11-23 14:25:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.9133765468473776) internal successors, (6641), 1697 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 6641 transitions. [2022-11-23 14:25:10,910 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 6641 transitions. Word has length 4 [2022-11-23 14:25:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:10,910 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 6641 transitions. [2022-11-23 14:25:10,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 6641 transitions. [2022-11-23 14:25:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:25:10,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:10,915 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:25:10,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:25:10,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-23 14:25:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1681811594, now seen corresponding path program 1 times [2022-11-23 14:25:10,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:10,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804118391] [2022-11-23 14:25:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:25:10,929 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:25:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:25:10,945 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:25:10,945 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:25:10,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-23 14:25:10,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-23 14:25:10,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-23 14:25:10,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-23 14:25:10,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-23 14:25:10,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-23 14:25:10,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-23 14:25:10,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:25:10,947 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 14:25:10,948 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:25:10,948 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-23 14:25:10,980 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:25:10,982 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:25:10,982 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 196 transitions, 452 flow [2022-11-23 14:25:10,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 196 transitions, 452 flow [2022-11-23 14:25:10,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 196 transitions, 452 flow [2022-11-23 14:25:11,027 INFO L130 PetriNetUnfolder]: 31/272 cut-off events. [2022-11-23 14:25:11,027 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-23 14:25:11,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 272 events. 31/272 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 746 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 250. Up to 14 conditions per place. [2022-11-23 14:25:11,043 INFO L119 LiptonReduction]: Number of co-enabled transitions 27216 [2022-11-23 14:25:17,667 INFO L134 LiptonReduction]: Checked pairs total: 24145 [2022-11-23 14:25:17,668 INFO L136 LiptonReduction]: Total number of compositions: 215 [2022-11-23 14:25:17,669 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 31 transitions, 122 flow [2022-11-23 14:25:19,247 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31393 states, 31188 states have (on average 5.383673207643966) internal successors, (167906), 31392 states have internal predecessors, (167906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:19,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:25:19,263 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=FINITE_AUTOMATA, 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;@645ae0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:25:19,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-23 14:25:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 31393 states, 31188 states have (on average 5.383673207643966) internal successors, (167906), 31392 states have internal predecessors, (167906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:25:19,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:19,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:25:19,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-23 14:25:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash 58226218, now seen corresponding path program 1 times [2022-11-23 14:25:19,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:19,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836777638] [2022-11-23 14:25:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:25:19,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:19,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836777638] [2022-11-23 14:25:19,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836777638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:19,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:25:19,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:25:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059936637] [2022-11-23 14:25:19,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:19,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:25:19,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:25:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:25:19,431 INFO L87 Difference]: Start difference. First operand has 31393 states, 31188 states have (on average 5.383673207643966) internal successors, (167906), 31392 states have internal predecessors, (167906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:19,812 INFO L93 Difference]: Finished difference Result 5100 states and 23327 transitions. [2022-11-23 14:25:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:25:19,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:25:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:19,886 INFO L225 Difference]: With dead ends: 5100 [2022-11-23 14:25:19,887 INFO L226 Difference]: Without dead ends: 5100 [2022-11-23 14:25:19,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:25:19,888 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:25:19,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:25:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2022-11-23 14:25:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 5100. [2022-11-23 14:25:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5100 states, 5099 states have (on average 4.574818591880761) internal successors, (23327), 5099 states have internal predecessors, (23327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 23327 transitions. [2022-11-23 14:25:20,263 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 23327 transitions. Word has length 4 [2022-11-23 14:25:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:20,263 INFO L495 AbstractCegarLoop]: Abstraction has 5100 states and 23327 transitions. [2022-11-23 14:25:20,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 23327 transitions. [2022-11-23 14:25:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 14:25:20,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:20,273 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:25:20,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:25:20,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-23 14:25:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:20,275 INFO L85 PathProgramCache]: Analyzing trace with hash -63035381, now seen corresponding path program 1 times [2022-11-23 14:25:20,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:20,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981835387] [2022-11-23 14:25:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:20,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:25:20,306 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:25:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:25:20,346 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:25:20,347 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:25:20,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-23 14:25:20,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-11-23 14:25:20,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-11-23 14:25:20,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-11-23 14:25:20,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-11-23 14:25:20,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-11-23 14:25:20,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-11-23 14:25:20,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-11-23 14:25:20,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:25:20,349 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 14:25:20,351 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:25:20,352 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-23 14:25:20,388 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:25:20,391 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:25:20,392 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 224 transitions, 525 flow [2022-11-23 14:25:20,392 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 224 transitions, 525 flow [2022-11-23 14:25:20,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 224 transitions, 525 flow [2022-11-23 14:25:20,472 INFO L130 PetriNetUnfolder]: 36/313 cut-off events. [2022-11-23 14:25:20,472 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-23 14:25:20,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 313 events. 36/313 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 897 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 300. Up to 16 conditions per place. [2022-11-23 14:25:20,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 37044 [2022-11-23 14:25:28,985 INFO L134 LiptonReduction]: Checked pairs total: 36381 [2022-11-23 14:25:28,985 INFO L136 LiptonReduction]: Total number of compositions: 256 [2022-11-23 14:25:28,986 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 38 transitions, 153 flow [2022-11-23 14:25:35,539 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 125600 states, 125197 states have (on average 6.907250173726207) internal successors, (864767), 125599 states have internal predecessors, (864767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:35,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:25:35,561 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=FINITE_AUTOMATA, 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;@645ae0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:25:35,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-23 14:25:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 125600 states, 125197 states have (on average 6.907250173726207) internal successors, (864767), 125599 states have internal predecessors, (864767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:35,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:25:35,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:35,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:25:35,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-23 14:25:35,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:35,880 INFO L85 PathProgramCache]: Analyzing trace with hash 73715181, now seen corresponding path program 1 times [2022-11-23 14:25:35,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:35,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838405430] [2022-11-23 14:25:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:35,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:25:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:25:35,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:25:35,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838405430] [2022-11-23 14:25:35,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838405430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:25:35,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:25:35,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:25:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456709760] [2022-11-23 14:25:35,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:25:35,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:25:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:35,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:25:35,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:25:36,108 INFO L87 Difference]: Start difference. First operand has 125600 states, 125197 states have (on average 6.907250173726207) internal successors, (864767), 125599 states have internal predecessors, (864767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:25:36,568 INFO L93 Difference]: Finished difference Result 15306 states and 80189 transitions. [2022-11-23 14:25:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:25:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:25:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:25:37,100 INFO L225 Difference]: With dead ends: 15306 [2022-11-23 14:25:37,100 INFO L226 Difference]: Without dead ends: 15306 [2022-11-23 14:25:37,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:25:37,102 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:25:37,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:25:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15306 states. [2022-11-23 14:25:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15306 to 15306. [2022-11-23 14:25:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15306 states, 15305 states have (on average 5.239398889251879) internal successors, (80189), 15305 states have internal predecessors, (80189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15306 states to 15306 states and 80189 transitions. [2022-11-23 14:25:38,238 INFO L78 Accepts]: Start accepts. Automaton has 15306 states and 80189 transitions. Word has length 4 [2022-11-23 14:25:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:25:38,238 INFO L495 AbstractCegarLoop]: Abstraction has 15306 states and 80189 transitions. [2022-11-23 14:25:38,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:25:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15306 states and 80189 transitions. [2022-11-23 14:25:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 14:25:38,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:25:38,260 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:25:38,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:25:38,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-23 14:25:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:25:38,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2108528905, now seen corresponding path program 1 times [2022-11-23 14:25:38,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:25:38,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273293242] [2022-11-23 14:25:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:25:38,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:25:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:25:38,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:25:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:25:38,340 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:25:38,341 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:25:38,341 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-23 14:25:38,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-11-23 14:25:38,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-11-23 14:25:38,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-11-23 14:25:38,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-11-23 14:25:38,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-11-23 14:25:38,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-11-23 14:25:38,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-11-23 14:25:38,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-11-23 14:25:38,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:25:38,344 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-23 14:25:38,345 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:25:38,345 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-23 14:25:38,392 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 14:25:38,396 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:25:38,396 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 252 transitions, 600 flow [2022-11-23 14:25:38,396 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 252 transitions, 600 flow [2022-11-23 14:25:38,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 252 transitions, 600 flow [2022-11-23 14:25:38,502 INFO L130 PetriNetUnfolder]: 41/354 cut-off events. [2022-11-23 14:25:38,502 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-23 14:25:38,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 354 events. 41/354 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1041 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 351. Up to 18 conditions per place. [2022-11-23 14:25:38,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 48384 [2022-11-23 14:25:48,853 INFO L134 LiptonReduction]: Checked pairs total: 47035 [2022-11-23 14:25:48,855 INFO L136 LiptonReduction]: Total number of compositions: 279 [2022-11-23 14:25:48,863 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 39 transitions, 174 flow [2022-11-23 14:26:19,996 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 502431 states, 501637 states have (on average 6.899554857396883) internal successors, (3461072), 502430 states have internal predecessors, (3461072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:26:19,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:26:19,998 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=FINITE_AUTOMATA, 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;@645ae0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:26:19,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-23 14:26:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 502431 states, 501637 states have (on average 6.899554857396883) internal successors, (3461072), 502430 states have internal predecessors, (3461072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:26:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:26:23,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:23,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:26:23,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-23 14:26:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash 90543106, now seen corresponding path program 1 times [2022-11-23 14:26:23,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:23,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77564221] [2022-11-23 14:26:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:23,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:23,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:23,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77564221] [2022-11-23 14:26:23,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77564221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:23,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:23,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:26:23,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629796622] [2022-11-23 14:26:23,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:23,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:26:23,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:26:23,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:26:24,491 INFO L87 Difference]: Start difference. First operand has 502431 states, 501637 states have (on average 6.899554857396883) internal successors, (3461072), 502430 states have internal predecessors, (3461072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:26:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:25,468 INFO L93 Difference]: Finished difference Result 45924 states and 271187 transitions. [2022-11-23 14:26:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:26:25,469 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:26:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted.