./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9 --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 a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:54:47,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:54:47,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:54:47,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:54:47,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:54:47,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:54:47,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:54:47,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:54:47,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:54:47,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:54:47,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:54:47,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:54:47,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:54:47,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:54:47,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:54:47,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:54:47,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:54:47,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:54:47,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:54:47,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:54:47,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:54:47,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:54:47,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:54:47,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:54:47,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:54:47,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:54:47,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:54:47,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:54:47,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:54:47,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:54:47,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:54:47,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:54:47,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:54:47,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:54:47,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:54:47,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:54:47,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:54:47,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:54:47,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:54:47,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:54:47,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:54:47,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:54:47,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:54:47,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:54:47,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:54:47,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:54:47,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:54:47,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:54:47,590 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:54:47,590 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:54:47,591 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:54:47,591 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:54:47,592 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:54:47,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:54:47,592 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:54:47,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:54:47,593 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:54:47,593 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:54:47,593 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:54:47,593 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:54:47,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:54:47,594 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:54:47,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:54:47,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:54:47,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:54:47,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:54:47,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:54:47,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:54:47,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:54:47,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:54:47,596 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:54:47,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:54:47,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:54:47,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:54:47,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:54:47,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:54:47,598 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:54:47,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:54:47,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:54:47,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:54:47,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:54:47,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:54:47,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:54:47,599 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_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 [2022-11-20 20:54:47,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:54:47,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:54:47,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:54:47,999 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:54:47,999 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:54:48,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-11-20 20:54:51,180 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:54:51,493 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:54:51,494 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-11-20 20:54:51,505 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/data/aa2442029/02d68031ee114eb3a3b83bbe5d014e92/FLAG4c8634095 [2022-11-20 20:54:51,525 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/data/aa2442029/02d68031ee114eb3a3b83bbe5d014e92 [2022-11-20 20:54:51,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:54:51,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:54:51,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:54:51,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:54:51,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:54:51,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:54:51" (1/1) ... [2022-11-20 20:54:51,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@539fbda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:51, skipping insertion in model container [2022-11-20 20:54:51,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:54:51" (1/1) ... [2022-11-20 20:54:51,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:54:51,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:54:51,957 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_eba4b1b1-ee94-42ea-a473-5e5afbef4720/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-11-20 20:54:51,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:54:51,979 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:54:52,039 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_eba4b1b1-ee94-42ea-a473-5e5afbef4720/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-11-20 20:54:52,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:54:52,074 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:54:52,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52 WrapperNode [2022-11-20 20:54:52,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:54:52,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:54:52,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:54:52,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:54:52,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,113 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 83 [2022-11-20 20:54:52,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:54:52,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:54:52,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:54:52,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:54:52,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,139 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:54:52,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:54:52,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:54:52,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:54:52,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (1/1) ... [2022-11-20 20:54:52,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:54:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:54:52,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:54:52,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba4b1b1-ee94-42ea-a473-5e5afbef4720/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:54:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:54:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-20 20:54:52,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-20 20:54:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:54:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:54:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:54:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:54:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:54:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:54:52,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:54:52,232 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:54:52,368 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:54:52,370 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:54:52,626 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:54:52,682 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:54:52,682 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:54:52,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:54:52 BoogieIcfgContainer [2022-11-20 20:54:52,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:54:52,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:54:52,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:54:52,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:54:52,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:54:51" (1/3) ... [2022-11-20 20:54:52,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f86fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:54:52, skipping insertion in model container [2022-11-20 20:54:52,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:52" (2/3) ... [2022-11-20 20:54:52,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f86fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:54:52, skipping insertion in model container [2022-11-20 20:54:52,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:54:52" (3/3) ... [2022-11-20 20:54:52,695 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2022-11-20 20:54:52,704 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 20:54:52,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:54:52,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:54:52,716 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:54:52,806 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:54:52,835 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:54:52,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 79 transitions, 163 flow [2022-11-20 20:54:52,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 79 transitions, 163 flow [2022-11-20 20:54:52,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 79 transitions, 163 flow [2022-11-20 20:54:52,963 INFO L130 PetriNetUnfolder]: 7/90 cut-off events. [2022-11-20 20:54:52,963 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 20:54:52,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-11-20 20:54:52,974 INFO L119 LiptonReduction]: Number of co-enabled transitions 1316 [2022-11-20 20:54:55,155 INFO L134 LiptonReduction]: Checked pairs total: 1465 [2022-11-20 20:54:55,155 INFO L136 LiptonReduction]: Total number of compositions: 76 [2022-11-20 20:54:55,165 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions, 39 flow [2022-11-20 20:54:55,181 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 51 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:55,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:54:55,208 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;@76a2618a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:54:55,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 20:54:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 51 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:54:55,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:54:55,217 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-20 20:54:55,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:54:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:54:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash -603584273, now seen corresponding path program 1 times [2022-11-20 20:54:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:54:55,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078813035] [2022-11-20 20:54:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:54:55,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:54:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:54:55,344 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:54:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:54:55,382 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:54:55,384 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:54:55,385 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-20 20:54:55,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-20 20:54:55,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-20 20:54:55,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:54:55,391 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 20:54:55,393 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:54:55,394 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 20:54:55,437 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:54:55,441 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:54:55,441 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 127 transitions, 266 flow [2022-11-20 20:54:55,442 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 127 transitions, 266 flow [2022-11-20 20:54:55,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 127 transitions, 266 flow [2022-11-20 20:54:55,479 INFO L130 PetriNetUnfolder]: 13/151 cut-off events. [2022-11-20 20:54:55,479 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 20:54:55,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 151 events. 13/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 322 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-11-20 20:54:55,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 7144 [2022-11-20 20:54:57,522 INFO L134 LiptonReduction]: Checked pairs total: 21357 [2022-11-20 20:54:57,522 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-11-20 20:54:57,524 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 47 transitions, 106 flow [2022-11-20 20:54:57,652 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2148 states, 2140 states have (on average 2.910747663551402) internal successors, (6229), 2147 states have internal predecessors, (6229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:57,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:54:57,663 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;@76a2618a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:54:57,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 20:54:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 2148 states, 2140 states have (on average 2.910747663551402) internal successors, (6229), 2147 states have internal predecessors, (6229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:54:57,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:54:57,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:54:57,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 20:54:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:54:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1219016691, now seen corresponding path program 1 times [2022-11-20 20:54:57,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:54:57,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164291339] [2022-11-20 20:54:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:54:57,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:54:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:54:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:54:57,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:54:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164291339] [2022-11-20 20:54:57,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164291339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:54:57,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:54:57,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:54:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582954906] [2022-11-20 20:54:57,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:54:57,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:54:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:54:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:54:57,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:54:57,937 INFO L87 Difference]: Start difference. First operand has 2148 states, 2140 states have (on average 2.910747663551402) internal successors, (6229), 2147 states have internal predecessors, (6229), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:54:58,083 INFO L93 Difference]: Finished difference Result 1605 states and 4431 transitions. [2022-11-20 20:54:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:54:58,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-20 20:54:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:54:58,111 INFO L225 Difference]: With dead ends: 1605 [2022-11-20 20:54:58,111 INFO L226 Difference]: Without dead ends: 1605 [2022-11-20 20:54:58,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:54:58,115 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:54:58,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 48 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:54:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2022-11-20 20:54:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1605. [2022-11-20 20:54:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1603 states have (on average 2.7641921397379914) internal successors, (4431), 1604 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 4431 transitions. [2022-11-20 20:54:58,260 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 4431 transitions. Word has length 10 [2022-11-20 20:54:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:54:58,261 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 4431 transitions. [2022-11-20 20:54:58,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:54:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 4431 transitions. [2022-11-20 20:54:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:54:58,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:54:58,264 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 20:54:58,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:54:58,265 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)] === [2022-11-20 20:54:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:54:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash 232516824, now seen corresponding path program 1 times [2022-11-20 20:54:58,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:54:58,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672927129] [2022-11-20 20:54:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:54:58,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:54:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:54:58,320 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:54:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:54:58,344 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:54:58,345 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:54:58,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 20:54:58,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 20:54:58,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-20 20:54:58,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 20:54:58,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:54:58,347 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 20:54:58,347 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:54:58,347 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 20:54:58,372 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:54:58,374 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:54:58,375 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 175 transitions, 371 flow [2022-11-20 20:54:58,375 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 175 transitions, 371 flow [2022-11-20 20:54:58,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 175 transitions, 371 flow [2022-11-20 20:54:58,417 INFO L130 PetriNetUnfolder]: 19/212 cut-off events. [2022-11-20 20:54:58,418 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 20:54:58,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 212 events. 19/212 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 599 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2022-11-20 20:54:58,431 INFO L119 LiptonReduction]: Number of co-enabled transitions 17484 [2022-11-20 20:55:00,820 INFO L134 LiptonReduction]: Checked pairs total: 41883 [2022-11-20 20:55:00,820 INFO L136 LiptonReduction]: Total number of compositions: 133 [2022-11-20 20:55:00,821 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 69 transitions, 159 flow [2022-11-20 20:55:02,814 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 43054 states, 43035 states have (on average 3.951411641686999) internal successors, (170049), 43053 states have internal predecessors, (170049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:02,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:55:02,816 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;@76a2618a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:55:02,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 20:55:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 43054 states, 43035 states have (on average 3.951411641686999) internal successors, (170049), 43053 states have internal predecessors, (170049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:55:02,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:02,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:02,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 20:55:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash 936927027, now seen corresponding path program 1 times [2022-11-20 20:55:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:55:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309725980] [2022-11-20 20:55:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:55:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:55:02,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:55:02,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309725980] [2022-11-20 20:55:02,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309725980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:55:02,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:55:02,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:55:02,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576899436] [2022-11-20 20:55:02,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:55:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:55:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:55:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:55:03,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:55:03,070 INFO L87 Difference]: Start difference. First operand has 43054 states, 43035 states have (on average 3.951411641686999) internal successors, (170049), 43053 states have internal predecessors, (170049), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:55:04,381 INFO L93 Difference]: Finished difference Result 30531 states and 118155 transitions. [2022-11-20 20:55:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:55:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-20 20:55:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:55:04,786 INFO L225 Difference]: With dead ends: 30531 [2022-11-20 20:55:04,787 INFO L226 Difference]: Without dead ends: 30531 [2022-11-20 20:55:04,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:55:04,792 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:55:04,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 62 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:55:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30531 states. [2022-11-20 20:55:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30531 to 30531. [2022-11-20 20:55:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30531 states, 30529 states have (on average 3.870254512103246) internal successors, (118155), 30530 states have internal predecessors, (118155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30531 states to 30531 states and 118155 transitions. [2022-11-20 20:55:06,898 INFO L78 Accepts]: Start accepts. Automaton has 30531 states and 118155 transitions. Word has length 10 [2022-11-20 20:55:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:55:06,898 INFO L495 AbstractCegarLoop]: Abstraction has 30531 states and 118155 transitions. [2022-11-20 20:55:06,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30531 states and 118155 transitions. [2022-11-20 20:55:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:55:06,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:06,906 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:06,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:55:06,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 20:55:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1514576903, now seen corresponding path program 1 times [2022-11-20 20:55:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:55:06,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956914683] [2022-11-20 20:55:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:55:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:55:07,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:55:07,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956914683] [2022-11-20 20:55:07,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956914683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:55:07,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:55:07,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:55:07,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565516452] [2022-11-20 20:55:07,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:55:07,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:55:07,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:55:07,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:55:07,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:55:07,020 INFO L87 Difference]: Start difference. First operand 30531 states and 118155 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-20 20:55:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:55:08,000 INFO L93 Difference]: Finished difference Result 30531 states and 116463 transitions. [2022-11-20 20:55:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:55:08,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) Word has length 14 [2022-11-20 20:55:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:55:08,304 INFO L225 Difference]: With dead ends: 30531 [2022-11-20 20:55:08,309 INFO L226 Difference]: Without dead ends: 30531 [2022-11-20 20:55:08,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:55:08,312 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:55:08,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 63 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:55:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30531 states. [2022-11-20 20:55:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30531 to 30531. [2022-11-20 20:55:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30531 states, 30527 states have (on average 3.8150817309267206) internal successors, (116463), 30530 states have internal predecessors, (116463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30531 states to 30531 states and 116463 transitions. [2022-11-20 20:55:09,915 INFO L78 Accepts]: Start accepts. Automaton has 30531 states and 116463 transitions. Word has length 14 [2022-11-20 20:55:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:55:09,917 INFO L495 AbstractCegarLoop]: Abstraction has 30531 states and 116463 transitions. [2022-11-20 20:55:09,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-20 20:55:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 30531 states and 116463 transitions. [2022-11-20 20:55:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:55:09,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:09,918 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 20:55:09,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:55:09,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 20:55:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1428254820, now seen corresponding path program 1 times [2022-11-20 20:55:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:55:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288476790] [2022-11-20 20:55:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:09,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:55:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:55:09,944 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:55:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:55:09,971 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:55:09,974 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:55:09,974 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 20:55:09,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 20:55:09,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 20:55:09,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 20:55:09,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 20:55:09,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:55:09,976 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 20:55:09,977 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 20:55:09,977 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 20:55:10,015 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 20:55:10,023 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:55:10,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 223 transitions, 478 flow [2022-11-20 20:55:10,024 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 223 transitions, 478 flow [2022-11-20 20:55:10,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 223 transitions, 478 flow [2022-11-20 20:55:10,104 INFO L130 PetriNetUnfolder]: 25/273 cut-off events. [2022-11-20 20:55:10,105 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 20:55:10,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 273 events. 25/273 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 881 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 220. Up to 10 conditions per place. [2022-11-20 20:55:10,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 32336 [2022-11-20 20:55:13,743 INFO L134 LiptonReduction]: Checked pairs total: 108137 [2022-11-20 20:55:13,744 INFO L136 LiptonReduction]: Total number of compositions: 178 [2022-11-20 20:55:13,745 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 91 places, 92 transitions, 216 flow [2022-11-20 20:55:43,123 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 818120 states, 818078 states have (on average 5.1052858040431355) internal successors, (4176522), 818119 states have internal predecessors, (4176522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:43,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:55:43,125 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;@76a2618a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:55:43,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 20:55:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 818120 states, 818078 states have (on average 5.1052858040431355) internal successors, (4176522), 818119 states have internal predecessors, (4176522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:55:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:55:44,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:44,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:55:44,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 20:55:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:44,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1232409625, now seen corresponding path program 1 times [2022-11-20 20:55:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:55:44,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637957160] [2022-11-20 20:55:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:55:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:55:44,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:55:44,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637957160] [2022-11-20 20:55:44,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637957160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:55:44,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:55:44,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:55:44,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600421004] [2022-11-20 20:55:44,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:55:44,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:55:44,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:55:44,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:55:44,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:55:45,416 INFO L87 Difference]: Start difference. First operand has 818120 states, 818078 states have (on average 5.1052858040431355) internal successors, (4176522), 818119 states have internal predecessors, (4176522), 0 states have call successors, (0), 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, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)