./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh --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 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:49:43,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:49:43,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:49:43,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:49:43,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:49:43,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:49:43,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:49:43,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:49:43,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:49:43,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:49:43,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:49:43,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:49:43,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:49:43,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:49:43,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:49:43,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:49:43,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:49:43,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:49:43,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:49:43,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:49:43,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:49:43,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:49:43,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:49:43,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:49:43,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:49:43,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:49:43,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:49:43,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:49:43,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:49:43,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:49:43,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:49:43,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:49:43,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:49:43,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:49:43,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:49:43,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:49:43,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:49:43,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:49:43,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:49:43,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:49:43,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:49:43,875 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:49:43,897 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:49:43,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:49:43,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:49:43,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:49:43,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:49:43,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:49:43,899 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:49:43,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:49:43,899 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:49:43,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:49:43,900 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:49:43,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:49:43,900 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:49:43,900 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:49:43,900 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:49:43,901 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:49:43,901 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:49:43,901 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:49:43,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:49:43,901 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:49:43,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:49:43,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:49:43,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:49:43,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:49:43,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:49:43,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:49:43,902 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:49:43,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:49:43,903 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:49:43,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:49:43,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:49:43,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:49:43,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:49:43,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:49:43,904 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:49:43,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:49:43,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:49:43,904 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:49:43,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:49:43,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:49:43,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:49:43,905 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_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2022-12-14 07:49:44,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:49:44,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:49:44,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:49:44,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:49:44,114 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:49:44,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-12-14 07:49:46,655 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:49:46,843 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:49:46,843 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-12-14 07:49:46,852 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/data/2213f0dc1/f1ae9bb92ea54388a5031ec1d2f841bd/FLAGc03c44056 [2022-12-14 07:49:47,256 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/data/2213f0dc1/f1ae9bb92ea54388a5031ec1d2f841bd [2022-12-14 07:49:47,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:49:47,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:49:47,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:49:47,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:49:47,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:49:47,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d29041b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47, skipping insertion in model container [2022-12-14 07:49:47,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:49:47,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:49:47,503 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_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-12-14 07:49:47,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:49:47,532 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:49:47,565 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_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-12-14 07:49:47,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:49:47,603 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:49:47,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47 WrapperNode [2022-12-14 07:49:47,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:49:47,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:49:47,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:49:47,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:49:47,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,634 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-12-14 07:49:47,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:49:47,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:49:47,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:49:47,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:49:47,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:49:47,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:49:47,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:49:47,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:49:47,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (1/1) ... [2022-12-14 07:49:47,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:49:47,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:49:47,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:49:47,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bdbf7a-3693-4b27-8d2c-034779d5ebc7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:49:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:49:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:49:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 07:49:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:49:47,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:49:47,712 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-14 07:49:47,712 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-14 07:49:47,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:49:47,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:49:47,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:49:47,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:49:47,714 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 07:49:47,818 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:49:47,821 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:49:48,012 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:49:48,018 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:49:48,019 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-14 07:49:48,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:49:48 BoogieIcfgContainer [2022-12-14 07:49:48,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:49:48,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:49:48,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:49:48,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:49:48,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:49:47" (1/3) ... [2022-12-14 07:49:48,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cd54d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:49:48, skipping insertion in model container [2022-12-14 07:49:48,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:49:47" (2/3) ... [2022-12-14 07:49:48,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cd54d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:49:48, skipping insertion in model container [2022-12-14 07:49:48,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:49:48" (3/3) ... [2022-12-14 07:49:48,027 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2022-12-14 07:49:48,034 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 07:49:48,043 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:49:48,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:49:48,044 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:49:48,084 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-14 07:49:48,108 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:49:48,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 130 transitions, 268 flow [2022-12-14 07:49:48,122 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 130 transitions, 268 flow [2022-12-14 07:49:48,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 130 transitions, 268 flow [2022-12-14 07:49:48,176 INFO L130 PetriNetUnfolder]: 30/188 cut-off events. [2022-12-14 07:49:48,176 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-14 07:49:48,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 188 events. 30/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 552 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-12-14 07:49:48,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 3968 [2022-12-14 07:49:50,120 INFO L134 LiptonReduction]: Checked pairs total: 11246 [2022-12-14 07:49:50,120 INFO L136 LiptonReduction]: Total number of compositions: 109 [2022-12-14 07:49:50,126 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 55 transitions, 118 flow [2022-12-14 07:49:50,151 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 303 states, 298 states have (on average 2.7348993288590604) internal successors, (815), 302 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:50,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:49:50,169 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;@19a10a8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:49:50,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 07:49:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 303 states, 298 states have (on average 2.7348993288590604) internal successors, (815), 302 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:49:50,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:50,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:49:50,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 07:49:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash 482025315, now seen corresponding path program 1 times [2022-12-14 07:49:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:50,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544635903] [2022-12-14 07:49:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:50,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:50,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544635903] [2022-12-14 07:49:50,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544635903] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:50,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:50,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:49:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625642446] [2022-12-14 07:49:50,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:50,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:50,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:50,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:50,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:50,359 INFO L87 Difference]: Start difference. First operand has 303 states, 298 states have (on average 2.7348993288590604) internal successors, (815), 302 states have internal predecessors, (815), 0 states have call successors, (0), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:50,423 INFO L93 Difference]: Finished difference Result 288 states and 558 transitions. [2022-12-14 07:49:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:50,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 07:49:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:50,434 INFO L225 Difference]: With dead ends: 288 [2022-12-14 07:49:50,435 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 07:49:50,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:50,439 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:50,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 24 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 07:49:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-12-14 07:49:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 256 states have (on average 1.9453125) internal successors, (498), 257 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 498 transitions. [2022-12-14 07:49:50,487 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 498 transitions. Word has length 5 [2022-12-14 07:49:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:50,487 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 498 transitions. [2022-12-14 07:49:50,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 498 transitions. [2022-12-14 07:49:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:49:50,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:50,488 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 07:49:50,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:49:50,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 07:49:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2069978637, now seen corresponding path program 1 times [2022-12-14 07:49:50,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:50,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899491418] [2022-12-14 07:49:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:50,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:49:50,519 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:49:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:49:50,551 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:49:50,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:49:50,552 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-14 07:49:50,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-14 07:49:50,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:49:50,555 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-14 07:49:50,556 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:49:50,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 07:49:50,569 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 07:49:50,573 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:49:50,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 163 transitions, 344 flow [2022-12-14 07:49:50,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 163 transitions, 344 flow [2022-12-14 07:49:50,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 163 transitions, 344 flow [2022-12-14 07:49:50,613 INFO L130 PetriNetUnfolder]: 51/304 cut-off events. [2022-12-14 07:49:50,613 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-14 07:49:50,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 304 events. 51/304 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1033 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2022-12-14 07:49:50,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 10540 [2022-12-14 07:49:52,744 INFO L134 LiptonReduction]: Checked pairs total: 29636 [2022-12-14 07:49:52,744 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-12-14 07:49:52,745 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 79 transitions, 176 flow [2022-12-14 07:49:52,848 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4803 states, 4796 states have (on average 4.016680567139283) internal successors, (19264), 4802 states have internal predecessors, (19264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:52,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:49:52,851 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;@19a10a8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:49:52,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 07:49:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 4803 states, 4796 states have (on average 4.016680567139283) internal successors, (19264), 4802 states have internal predecessors, (19264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:49:52,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:52,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:49:52,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 07:49:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 791870361, now seen corresponding path program 1 times [2022-12-14 07:49:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017836499] [2022-12-14 07:49:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:52,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:52,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017836499] [2022-12-14 07:49:52,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017836499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:52,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:52,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:49:52,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523795833] [2022-12-14 07:49:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:52,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:52,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:52,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:52,930 INFO L87 Difference]: Start difference. First operand has 4803 states, 4796 states have (on average 4.016680567139283) internal successors, (19264), 4802 states have internal predecessors, (19264), 0 states have call successors, (0), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:53,030 INFO L93 Difference]: Finished difference Result 4788 states and 13848 transitions. [2022-12-14 07:49:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:53,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 07:49:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:53,050 INFO L225 Difference]: With dead ends: 4788 [2022-12-14 07:49:53,050 INFO L226 Difference]: Without dead ends: 4308 [2022-12-14 07:49:53,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:53,052 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:53,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:49:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2022-12-14 07:49:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 4308. [2022-12-14 07:49:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4308 states, 4305 states have (on average 2.889198606271777) internal successors, (12438), 4307 states have internal predecessors, (12438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 12438 transitions. [2022-12-14 07:49:53,171 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 12438 transitions. Word has length 5 [2022-12-14 07:49:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:53,171 INFO L495 AbstractCegarLoop]: Abstraction has 4308 states and 12438 transitions. [2022-12-14 07:49:53,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 12438 transitions. [2022-12-14 07:49:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:49:53,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:53,173 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 07:49:53,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:49:53,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 07:49:53,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1078930638, now seen corresponding path program 1 times [2022-12-14 07:49:53,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:53,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633378609] [2022-12-14 07:49:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:53,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:49:53,208 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:49:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:49:53,226 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:49:53,226 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:49:53,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-14 07:49:53,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-14 07:49:53,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:49:53,227 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-14 07:49:53,227 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:49:53,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 07:49:53,244 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 07:49:53,246 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:49:53,247 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 196 transitions, 422 flow [2022-12-14 07:49:53,247 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 196 transitions, 422 flow [2022-12-14 07:49:53,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 422 flow [2022-12-14 07:49:53,293 INFO L130 PetriNetUnfolder]: 77/453 cut-off events. [2022-12-14 07:49:53,294 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-14 07:49:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 77/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1678 event pairs, 1 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2022-12-14 07:49:53,307 INFO L119 LiptonReduction]: Number of co-enabled transitions 18972 [2022-12-14 07:49:55,334 INFO L134 LiptonReduction]: Checked pairs total: 58349 [2022-12-14 07:49:55,334 INFO L136 LiptonReduction]: Total number of compositions: 150 [2022-12-14 07:49:55,335 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 77 places, 103 transitions, 236 flow [2022-12-14 07:49:57,004 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 72078 states, 72069 states have (on average 5.460045234428118) internal successors, (393500), 72077 states have internal predecessors, (393500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:57,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:49:57,006 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;@19a10a8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:49:57,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 07:49:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 72078 states, 72069 states have (on average 5.460045234428118) internal successors, (393500), 72077 states have internal predecessors, (393500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:49:57,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:57,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:49:57,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 07:49:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1152282904, now seen corresponding path program 1 times [2022-12-14 07:49:57,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:49:57,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354794828] [2022-12-14 07:49:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:49:57,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:49:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:49:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:57,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:49:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354794828] [2022-12-14 07:49:57,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354794828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:49:57,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:49:57,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:49:57,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987577972] [2022-12-14 07:49:57,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:49:57,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:49:57,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:49:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:49:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:57,312 INFO L87 Difference]: Start difference. First operand has 72078 states, 72069 states have (on average 5.460045234428118) internal successors, (393500), 72077 states have internal predecessors, (393500), 0 states have call successors, (0), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:49:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:58,072 INFO L93 Difference]: Finished difference Result 72063 states and 280023 transitions. [2022-12-14 07:49:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:49:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 07:49:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:58,533 INFO L225 Difference]: With dead ends: 72063 [2022-12-14 07:49:58,533 INFO L226 Difference]: Without dead ends: 64833 [2022-12-14 07:49:58,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:49:58,534 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:58,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 56 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:49:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64833 states. [2022-12-14 07:49:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64833 to 64833. [2022-12-14 07:49:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64833 states, 64829 states have (on average 3.8811797189529376) internal successors, (251613), 64832 states have internal predecessors, (251613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64833 states to 64833 states and 251613 transitions. [2022-12-14 07:50:00,338 INFO L78 Accepts]: Start accepts. Automaton has 64833 states and 251613 transitions. Word has length 5 [2022-12-14 07:50:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:50:00,339 INFO L495 AbstractCegarLoop]: Abstraction has 64833 states and 251613 transitions. [2022-12-14 07:50:00,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 64833 states and 251613 transitions. [2022-12-14 07:50:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:50:00,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:50:00,345 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 07:50:00,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:50:00,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 07:50:00,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:00,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1368200002, now seen corresponding path program 1 times [2022-12-14 07:50:00,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:50:00,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669943918] [2022-12-14 07:50:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:00,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:50:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:50:00,360 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:50:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:50:00,378 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:50:00,378 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:50:00,378 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-14 07:50:00,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-14 07:50:00,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:50:00,379 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-14 07:50:00,379 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:50:00,379 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-14 07:50:00,401 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-14 07:50:00,404 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:50:00,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 229 transitions, 502 flow [2022-12-14 07:50:00,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 229 transitions, 502 flow [2022-12-14 07:50:00,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 229 transitions, 502 flow [2022-12-14 07:50:00,486 INFO L130 PetriNetUnfolder]: 115/670 cut-off events. [2022-12-14 07:50:00,486 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-14 07:50:00,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 670 events. 115/670 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2761 event pairs, 6 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-12-14 07:50:00,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 29512 [2022-12-14 07:50:03,526 INFO L134 LiptonReduction]: Checked pairs total: 106302 [2022-12-14 07:50:03,526 INFO L136 LiptonReduction]: Total number of compositions: 174 [2022-12-14 07:50:03,527 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 125 transitions, 294 flow [2022-12-14 07:50:37,586 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1081203 states, 1081192 states have (on average 6.809113459959009) internal successors, (7361959), 1081202 states have internal predecessors, (7361959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:37,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:50:37,587 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;@19a10a8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:50:37,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 07:50:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 1081203 states, 1081192 states have (on average 6.809113459959009) internal successors, (7361959), 1081202 states have internal predecessors, (7361959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:50:41,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:50:41,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:50:41,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 07:50:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1569042507, now seen corresponding path program 1 times [2022-12-14 07:50:41,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:50:41,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334614091] [2022-12-14 07:50:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:50:41,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:50:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:50:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:41,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:50:41,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334614091] [2022-12-14 07:50:41,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334614091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:50:41,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:50:41,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:50:41,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882377656] [2022-12-14 07:50:41,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:50:41,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:50:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:50:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:50:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:50:43,310 INFO L87 Difference]: Start difference. First operand has 1081203 states, 1081192 states have (on average 6.809113459959009) internal successors, (7361959), 1081202 states have internal predecessors, (7361959), 0 states have call successors, (0), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:50:57,108 INFO L93 Difference]: Finished difference Result 1081188 states and 5281773 transitions. [2022-12-14 07:50:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:50:57,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 07:50:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:06,539 INFO L225 Difference]: With dead ends: 1081188 [2022-12-14 07:51:06,539 INFO L226 Difference]: Without dead ends: 972708 [2022-12-14 07:51:06,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:51:06,540 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:06,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 60 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:51:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972708 states.