./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:15:10,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:15:10,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:15:10,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:15:10,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:15:10,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:15:10,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:15:10,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:15:10,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:15:10,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:15:10,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:15:10,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:15:10,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:15:10,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:15:10,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:15:10,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:15:10,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:15:10,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:15:10,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:15:10,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:15:10,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:15:10,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:15:10,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:15:10,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:15:10,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:15:10,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:15:10,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:15:10,560 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:15:10,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:15:10,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:15:10,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:15:10,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:15:10,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:15:10,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:15:10,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:15:10,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:15:10,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:15:10,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:15:10,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:15:10,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:15:10,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:15:10,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:15:10,616 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:15:10,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:15:10,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:15:10,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:15:10,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:15:10,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:15:10,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:15:10,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:15:10,621 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:15:10,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:15:10,623 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:15:10,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:15:10,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:15:10,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:15:10,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:15:10,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:15:10,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:15:10,625 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:15:10,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:15:10,625 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:15:10,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:15:10,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:15:10,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:15:10,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:15:10,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:15:10,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:15:10,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:15:10,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:15:10,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:15:10,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:15:10,629 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:15:10,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:15:10,630 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:15:10,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:15:10,631 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2022-11-25 18:15:10,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:15:10,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:15:10,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:15:10,996 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:15:10,996 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:15:10,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-25 18:15:14,140 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:15:14,478 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:15:14,479 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-25 18:15:14,507 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/data/511457351/7889e5ac691a418e8411cc0f19e4da70/FLAGb9cb634bb [2022-11-25 18:15:14,524 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/data/511457351/7889e5ac691a418e8411cc0f19e4da70 [2022-11-25 18:15:14,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:15:14,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:15:14,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:15:14,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:15:14,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:15:14,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:14" (1/1) ... [2022-11-25 18:15:14,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1377050b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:14, skipping insertion in model container [2022-11-25 18:15:14,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:15:14" (1/1) ... [2022-11-25 18:15:14,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:15:14,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:15:14,911 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_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-25 18:15:14,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:15:14,937 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:15:14,989 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_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-25 18:15:14,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:15:15,031 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:15:15,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15 WrapperNode [2022-11-25 18:15:15,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:15:15,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:15:15,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:15:15,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:15:15,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,084 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2022-11-25 18:15:15,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:15:15,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:15:15,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:15:15,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:15:15,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,111 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:15:15,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:15:15,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:15:15,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:15:15,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (1/1) ... [2022-11-25 18:15:15,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:15:15,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:15,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:15:15,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:15:15,214 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-25 18:15:15,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-25 18:15:15,215 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 18:15:15,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 18:15:15,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:15:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:15:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:15:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:15:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:15:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:15:15,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:15:15,227 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:15:15,440 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:15:15,442 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:15:15,727 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:15:15,812 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:15:15,812 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 18:15:15,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:15 BoogieIcfgContainer [2022-11-25 18:15:15,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:15:15,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:15:15,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:15:15,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:15:15,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:15:14" (1/3) ... [2022-11-25 18:15:15,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548d53a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:15, skipping insertion in model container [2022-11-25 18:15:15,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:15:15" (2/3) ... [2022-11-25 18:15:15,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548d53a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:15:15, skipping insertion in model container [2022-11-25 18:15:15,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:15:15" (3/3) ... [2022-11-25 18:15:15,861 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2022-11-25 18:15:15,871 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:15:15,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:15:15,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:15:15,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:15:15,984 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:15:16,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 65 transitions, 140 flow [2022-11-25 18:15:16,141 INFO L130 PetriNetUnfolder]: 7/75 cut-off events. [2022-11-25 18:15:16,141 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:16,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 7/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2022-11-25 18:15:16,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 65 transitions, 140 flow [2022-11-25 18:15:16,158 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 64 transitions, 136 flow [2022-11-25 18:15:16,163 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:15:16,202 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 64 transitions, 136 flow [2022-11-25 18:15:16,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 64 transitions, 136 flow [2022-11-25 18:15:16,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 64 transitions, 136 flow [2022-11-25 18:15:16,251 INFO L130 PetriNetUnfolder]: 7/75 cut-off events. [2022-11-25 18:15:16,252 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:16,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 7/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2022-11-25 18:15:16,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 1090 [2022-11-25 18:15:17,966 INFO L134 LiptonReduction]: Checked pairs total: 1990 [2022-11-25 18:15:17,967 INFO L136 LiptonReduction]: Total number of compositions: 49 [2022-11-25 18:15:17,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:17,991 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36ce4cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:17,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:15:17,997 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 18:15:17,997 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:17,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:17,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:15:17,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:15:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:18,005 INFO L85 PathProgramCache]: Analyzing trace with hash 348706782, now seen corresponding path program 1 times [2022-11-25 18:15:18,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:18,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100402310] [2022-11-25 18:15:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:18,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:18,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100402310] [2022-11-25 18:15:18,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100402310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:18,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:18,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:18,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116645099] [2022-11-25 18:15:18,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:18,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:18,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 114 [2022-11-25 18:15:18,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:18,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:18,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 114 [2022-11-25 18:15:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:18,415 INFO L130 PetriNetUnfolder]: 195/326 cut-off events. [2022-11-25 18:15:18,415 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:15:18,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 326 events. 195/326 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1132 event pairs, 57 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 653. Up to 170 conditions per place. [2022-11-25 18:15:18,420 INFO L137 encePairwiseOnDemand]: 105/114 looper letters, 19 selfloop transitions, 4 changer transitions 0/26 dead transitions. [2022-11-25 18:15:18,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 26 transitions, 106 flow [2022-11-25 18:15:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-11-25 18:15:18,435 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48830409356725146 [2022-11-25 18:15:18,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-11-25 18:15:18,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-11-25 18:15:18,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:18,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-11-25 18:15:18,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:18,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:18,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:18,451 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 50 flow. Second operand 3 states and 167 transitions. [2022-11-25 18:15:18,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 26 transitions, 106 flow [2022-11-25 18:15:18,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:18,456 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 71 flow [2022-11-25 18:15:18,458 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2022-11-25 18:15:18,462 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2022-11-25 18:15:18,462 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 71 flow [2022-11-25 18:15:18,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:18,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:18,463 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:18,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:15:18,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:15:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -70203032, now seen corresponding path program 1 times [2022-11-25 18:15:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:18,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076628610] [2022-11-25 18:15:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:18,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:18,504 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:15:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:18,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:15:18,549 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:15:18,551 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-25 18:15:18,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-25 18:15:18,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-25 18:15:18,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-25 18:15:18,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:15:18,562 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 18:15:18,566 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:15:18,566 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:15:18,590 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:15:18,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 208 flow [2022-11-25 18:15:18,607 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2022-11-25 18:15:18,607 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:15:18,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 101 events. 10/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-11-25 18:15:18,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 208 flow [2022-11-25 18:15:18,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 77 transitions, 169 flow [2022-11-25 18:15:18,609 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:15:18,610 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 77 transitions, 169 flow [2022-11-25 18:15:18,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 77 transitions, 169 flow [2022-11-25 18:15:18,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 77 transitions, 169 flow [2022-11-25 18:15:18,629 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2022-11-25 18:15:18,629 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:15:18,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 101 events. 10/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2022-11-25 18:15:18,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 2076 [2022-11-25 18:15:20,216 INFO L134 LiptonReduction]: Checked pairs total: 5893 [2022-11-25 18:15:20,216 INFO L136 LiptonReduction]: Total number of compositions: 51 [2022-11-25 18:15:20,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:20,219 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36ce4cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:20,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-25 18:15:20,221 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 18:15:20,222 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:20,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:20,224 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:15:20,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash 510832584, now seen corresponding path program 1 times [2022-11-25 18:15:20,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:20,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138336702] [2022-11-25 18:15:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:20,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:20,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138336702] [2022-11-25 18:15:20,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138336702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:20,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:20,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:20,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749035519] [2022-11-25 18:15:20,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:20,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:20,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:20,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:20,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:20,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 143 [2022-11-25 18:15:20,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:20,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 143 [2022-11-25 18:15:20,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:20,619 INFO L130 PetriNetUnfolder]: 1108/1805 cut-off events. [2022-11-25 18:15:20,620 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-25 18:15:20,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3541 conditions, 1805 events. 1108/1805 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9846 event pairs, 273 based on Foata normal form. 0/1742 useless extension candidates. Maximal degree in co-relation 3530. Up to 1041 conditions per place. [2022-11-25 18:15:20,641 INFO L137 encePairwiseOnDemand]: 131/143 looper letters, 25 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2022-11-25 18:15:20,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 164 flow [2022-11-25 18:15:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2022-11-25 18:15:20,649 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48951048951048953 [2022-11-25 18:15:20,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2022-11-25 18:15:20,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2022-11-25 18:15:20,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:20,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2022-11-25 18:15:20,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,660 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,661 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 81 flow. Second operand 3 states and 210 transitions. [2022-11-25 18:15:20,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 164 flow [2022-11-25 18:15:20,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 161 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:20,664 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 114 flow [2022-11-25 18:15:20,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2022-11-25 18:15:20,665 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2022-11-25 18:15:20,665 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 114 flow [2022-11-25 18:15:20,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:20,666 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:20,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:15:20,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:20,668 INFO L85 PathProgramCache]: Analyzing trace with hash 789847600, now seen corresponding path program 1 times [2022-11-25 18:15:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:20,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931456062] [2022-11-25 18:15:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:20,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:20,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931456062] [2022-11-25 18:15:20,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931456062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:20,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:20,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:15:20,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110752912] [2022-11-25 18:15:20,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:20,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:20,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:20,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:20,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 143 [2022-11-25 18:15:20,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:20,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 143 [2022-11-25 18:15:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:20,872 INFO L130 PetriNetUnfolder]: 104/334 cut-off events. [2022-11-25 18:15:20,873 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-11-25 18:15:20,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 334 events. 104/334 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1630 event pairs, 15 based on Foata normal form. 101/431 useless extension candidates. Maximal degree in co-relation 661. Up to 121 conditions per place. [2022-11-25 18:15:20,876 INFO L137 encePairwiseOnDemand]: 137/143 looper letters, 11 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2022-11-25 18:15:20,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 152 flow [2022-11-25 18:15:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-11-25 18:15:20,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5011655011655012 [2022-11-25 18:15:20,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-11-25 18:15:20,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-11-25 18:15:20,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:20,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-11-25 18:15:20,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,890 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 114 flow. Second operand 3 states and 215 transitions. [2022-11-25 18:15:20,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 152 flow [2022-11-25 18:15:20,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 140 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:20,897 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 102 flow [2022-11-25 18:15:20,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-11-25 18:15:20,900 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2022-11-25 18:15:20,902 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 102 flow [2022-11-25 18:15:20,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:20,903 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:20,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:15:20,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-25 18:15:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash -482732794, now seen corresponding path program 1 times [2022-11-25 18:15:20,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:20,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619445205] [2022-11-25 18:15:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:20,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:20,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:15:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:20,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:15:20,990 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:15:20,990 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-25 18:15:20,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-25 18:15:20,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-25 18:15:20,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-25 18:15:20,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-25 18:15:20,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:15:20,992 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 18:15:20,993 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:15:20,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 18:15:21,040 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:15:21,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 280 flow [2022-11-25 18:15:21,071 INFO L130 PetriNetUnfolder]: 13/127 cut-off events. [2022-11-25 18:15:21,071 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:15:21,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 127 events. 13/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 228 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2022-11-25 18:15:21,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 280 flow [2022-11-25 18:15:21,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 90 transitions, 204 flow [2022-11-25 18:15:21,075 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:15:21,075 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 90 transitions, 204 flow [2022-11-25 18:15:21,076 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 90 transitions, 204 flow [2022-11-25 18:15:21,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 90 transitions, 204 flow [2022-11-25 18:15:21,104 INFO L130 PetriNetUnfolder]: 13/127 cut-off events. [2022-11-25 18:15:21,104 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:15:21,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 127 events. 13/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 117. Up to 8 conditions per place. [2022-11-25 18:15:21,109 INFO L119 LiptonReduction]: Number of co-enabled transitions 3374 [2022-11-25 18:15:22,618 INFO L134 LiptonReduction]: Checked pairs total: 10119 [2022-11-25 18:15:22,619 INFO L136 LiptonReduction]: Total number of compositions: 56 [2022-11-25 18:15:22,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:22,622 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36ce4cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:22,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-25 18:15:22,624 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 18:15:22,624 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:22,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:22,625 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:15:22,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 18:15:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:22,626 INFO L85 PathProgramCache]: Analyzing trace with hash 703416826, now seen corresponding path program 1 times [2022-11-25 18:15:22,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:22,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121215448] [2022-11-25 18:15:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:22,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:22,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121215448] [2022-11-25 18:15:22,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121215448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:22,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:22,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:22,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107981199] [2022-11-25 18:15:22,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:22,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:22,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:22,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:22,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 175 [2022-11-25 18:15:22,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:22,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:22,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 175 [2022-11-25 18:15:22,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:23,956 INFO L130 PetriNetUnfolder]: 8026/11566 cut-off events. [2022-11-25 18:15:23,956 INFO L131 PetriNetUnfolder]: For 1487/1487 co-relation queries the response was YES. [2022-11-25 18:15:23,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23150 conditions, 11566 events. 8026/11566 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 69072 event pairs, 2121 based on Foata normal form. 0/11256 useless extension candidates. Maximal degree in co-relation 23138. Up to 7357 conditions per place. [2022-11-25 18:15:24,054 INFO L137 encePairwiseOnDemand]: 160/175 looper letters, 33 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2022-11-25 18:15:24,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 226 flow [2022-11-25 18:15:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-11-25 18:15:24,056 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2022-11-25 18:15:24,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-11-25 18:15:24,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-11-25 18:15:24,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:24,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-11-25 18:15:24,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,059 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 108 flow. Second operand 3 states and 255 transitions. [2022-11-25 18:15:24,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 226 flow [2022-11-25 18:15:24,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 217 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:24,064 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 151 flow [2022-11-25 18:15:24,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2022-11-25 18:15:24,067 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2022-11-25 18:15:24,067 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 151 flow [2022-11-25 18:15:24,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:24,068 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:24,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:15:24,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 18:15:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1398859184, now seen corresponding path program 1 times [2022-11-25 18:15:24,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:24,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001389212] [2022-11-25 18:15:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:24,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:24,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001389212] [2022-11-25 18:15:24,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001389212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:24,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:24,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:15:24,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053828333] [2022-11-25 18:15:24,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:24,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:24,184 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 175 [2022-11-25 18:15:24,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:24,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 175 [2022-11-25 18:15:24,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:24,378 INFO L130 PetriNetUnfolder]: 303/927 cut-off events. [2022-11-25 18:15:24,378 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2022-11-25 18:15:24,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 927 events. 303/927 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5849 event pairs, 39 based on Foata normal form. 413/1331 useless extension candidates. Maximal degree in co-relation 1853. Up to 343 conditions per place. [2022-11-25 18:15:24,385 INFO L137 encePairwiseOnDemand]: 167/175 looper letters, 13 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2022-11-25 18:15:24,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 198 flow [2022-11-25 18:15:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2022-11-25 18:15:24,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2022-11-25 18:15:24,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2022-11-25 18:15:24,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2022-11-25 18:15:24,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:24,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2022-11-25 18:15:24,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,391 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 151 flow. Second operand 3 states and 265 transitions. [2022-11-25 18:15:24,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 198 flow [2022-11-25 18:15:24,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 182 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:24,397 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 133 flow [2022-11-25 18:15:24,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2022-11-25 18:15:24,399 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2022-11-25 18:15:24,401 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 133 flow [2022-11-25 18:15:24,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,401 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:24,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:24,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:15:24,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 18:15:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash -952479273, now seen corresponding path program 1 times [2022-11-25 18:15:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:24,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384625964] [2022-11-25 18:15:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:24,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:24,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384625964] [2022-11-25 18:15:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384625964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:24,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:24,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:15:24,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795711248] [2022-11-25 18:15:24,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:24,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:24,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 175 [2022-11-25 18:15:24,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 133 flow. Second operand has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:24,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:24,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 175 [2022-11-25 18:15:24,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:25,034 INFO L130 PetriNetUnfolder]: 794/1800 cut-off events. [2022-11-25 18:15:25,035 INFO L131 PetriNetUnfolder]: For 658/659 co-relation queries the response was YES. [2022-11-25 18:15:25,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4621 conditions, 1800 events. 794/1800 cut-off events. For 658/659 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12987 event pairs, 41 based on Foata normal form. 0/1776 useless extension candidates. Maximal degree in co-relation 4607. Up to 1016 conditions per place. [2022-11-25 18:15:25,055 INFO L137 encePairwiseOnDemand]: 164/175 looper letters, 57 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2022-11-25 18:15:25,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 83 transitions, 455 flow [2022-11-25 18:15:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:15:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 444 transitions. [2022-11-25 18:15:25,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2022-11-25 18:15:25,058 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 444 transitions. [2022-11-25 18:15:25,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 444 transitions. [2022-11-25 18:15:25,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:25,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 444 transitions. [2022-11-25 18:15:25,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:25,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:25,065 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:25,065 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 133 flow. Second operand 6 states and 444 transitions. [2022-11-25 18:15:25,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 83 transitions, 455 flow [2022-11-25 18:15:25,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:25,070 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 252 flow [2022-11-25 18:15:25,071 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2022-11-25 18:15:25,073 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2022-11-25 18:15:25,073 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 252 flow [2022-11-25 18:15:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:25,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:25,074 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:25,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:15:25,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-25 18:15:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash -550376187, now seen corresponding path program 1 times [2022-11-25 18:15:25,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:25,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334465156] [2022-11-25 18:15:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:25,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:25,098 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:15:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:25,126 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:15:25,129 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:15:25,129 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-25 18:15:25,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-25 18:15:25,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-25 18:15:25,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-25 18:15:25,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-25 18:15:25,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-25 18:15:25,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:15:25,132 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 18:15:25,133 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:15:25,133 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 18:15:25,174 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:15:25,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 146 transitions, 356 flow [2022-11-25 18:15:25,201 INFO L130 PetriNetUnfolder]: 16/153 cut-off events. [2022-11-25 18:15:25,201 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:15:25,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 153 events. 16/153 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 288 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2022-11-25 18:15:25,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 146 transitions, 356 flow [2022-11-25 18:15:25,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 103 transitions, 241 flow [2022-11-25 18:15:25,205 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:15:25,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 103 transitions, 241 flow [2022-11-25 18:15:25,205 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 103 transitions, 241 flow [2022-11-25 18:15:25,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 103 transitions, 241 flow [2022-11-25 18:15:25,221 INFO L130 PetriNetUnfolder]: 16/153 cut-off events. [2022-11-25 18:15:25,222 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:15:25,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 153 events. 16/153 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 288 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 149. Up to 10 conditions per place. [2022-11-25 18:15:25,227 INFO L119 LiptonReduction]: Number of co-enabled transitions 4984 [2022-11-25 18:15:26,826 INFO L134 LiptonReduction]: Checked pairs total: 16038 [2022-11-25 18:15:26,826 INFO L136 LiptonReduction]: Total number of compositions: 61 [2022-11-25 18:15:26,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:26,829 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36ce4cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:26,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 18:15:26,831 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 18:15:26,832 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:26,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:26,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:15:26,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 18:15:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash 926551053, now seen corresponding path program 1 times [2022-11-25 18:15:26,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:26,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376405420] [2022-11-25 18:15:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:26,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:26,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376405420] [2022-11-25 18:15:26,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376405420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:26,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:26,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:26,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597810804] [2022-11-25 18:15:26,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:26,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:26,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:26,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:26,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 207 [2022-11-25 18:15:26,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:26,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:26,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 207 [2022-11-25 18:15:26,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:30,800 INFO L130 PetriNetUnfolder]: 27801/36623 cut-off events. [2022-11-25 18:15:30,800 INFO L131 PetriNetUnfolder]: For 5989/5989 co-relation queries the response was YES. [2022-11-25 18:15:30,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74030 conditions, 36623 events. 27801/36623 cut-off events. For 5989/5989 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 205330 event pairs, 8282 based on Foata normal form. 63/36683 useless extension candidates. Maximal degree in co-relation 74017. Up to 33575 conditions per place. [2022-11-25 18:15:31,097 INFO L137 encePairwiseOnDemand]: 194/207 looper letters, 36 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2022-11-25 18:15:31,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 254 flow [2022-11-25 18:15:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2022-11-25 18:15:31,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49597423510466987 [2022-11-25 18:15:31,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2022-11-25 18:15:31,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2022-11-25 18:15:31,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:31,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2022-11-25 18:15:31,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,103 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 137 flow. Second operand 3 states and 308 transitions. [2022-11-25 18:15:31,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 254 flow [2022-11-25 18:15:31,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 235 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:31,109 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 143 flow [2022-11-25 18:15:31,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2022-11-25 18:15:31,110 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2022-11-25 18:15:31,110 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 143 flow [2022-11-25 18:15:31,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:31,110 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:31,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:15:31,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 18:15:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:31,111 INFO L85 PathProgramCache]: Analyzing trace with hash -862465178, now seen corresponding path program 1 times [2022-11-25 18:15:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:31,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225026111] [2022-11-25 18:15:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:31,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225026111] [2022-11-25 18:15:31,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225026111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:31,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:15:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510123494] [2022-11-25 18:15:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:31,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:31,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2022-11-25 18:15:31,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:31,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2022-11-25 18:15:31,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:31,459 INFO L130 PetriNetUnfolder]: 590/1896 cut-off events. [2022-11-25 18:15:31,460 INFO L131 PetriNetUnfolder]: For 271/271 co-relation queries the response was YES. [2022-11-25 18:15:31,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 1896 events. 590/1896 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14174 event pairs, 118 based on Foata normal form. 1022/2911 useless extension candidates. Maximal degree in co-relation 3467. Up to 662 conditions per place. [2022-11-25 18:15:31,474 INFO L137 encePairwiseOnDemand]: 197/207 looper letters, 15 selfloop transitions, 10 changer transitions 0/54 dead transitions. [2022-11-25 18:15:31,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 223 flow [2022-11-25 18:15:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-11-25 18:15:31,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2022-11-25 18:15:31,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-11-25 18:15:31,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-11-25 18:15:31,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:31,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-11-25 18:15:31,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,482 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 143 flow. Second operand 3 states and 315 transitions. [2022-11-25 18:15:31,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 223 flow [2022-11-25 18:15:31,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:31,486 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 158 flow [2022-11-25 18:15:31,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2022-11-25 18:15:31,488 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2022-11-25 18:15:31,488 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 158 flow [2022-11-25 18:15:31,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,488 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:31,489 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:31,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:15:31,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 18:15:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash 186856259, now seen corresponding path program 1 times [2022-11-25 18:15:31,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:31,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085296752] [2022-11-25 18:15:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:31,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085296752] [2022-11-25 18:15:31,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085296752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:31,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:31,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:15:31,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805605536] [2022-11-25 18:15:31,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:31,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:31,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:31,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:31,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 207 [2022-11-25 18:15:31,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:31,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:31,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 207 [2022-11-25 18:15:31,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:32,137 INFO L130 PetriNetUnfolder]: 1482/3331 cut-off events. [2022-11-25 18:15:32,137 INFO L131 PetriNetUnfolder]: For 1316/1316 co-relation queries the response was YES. [2022-11-25 18:15:32,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8457 conditions, 3331 events. 1482/3331 cut-off events. For 1316/1316 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 26222 event pairs, 55 based on Foata normal form. 20/3348 useless extension candidates. Maximal degree in co-relation 8442. Up to 2141 conditions per place. [2022-11-25 18:15:32,167 INFO L137 encePairwiseOnDemand]: 193/207 looper letters, 62 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-11-25 18:15:32,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 92 transitions, 504 flow [2022-11-25 18:15:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:15:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 542 transitions. [2022-11-25 18:15:32,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4363929146537842 [2022-11-25 18:15:32,172 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 542 transitions. [2022-11-25 18:15:32,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 542 transitions. [2022-11-25 18:15:32,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:32,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 542 transitions. [2022-11-25 18:15:32,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.33333333333333) internal successors, (542), 6 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:32,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 207.0) internal successors, (1449), 7 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:32,178 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 207.0) internal successors, (1449), 7 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:32,178 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 158 flow. Second operand 6 states and 542 transitions. [2022-11-25 18:15:32,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 92 transitions, 504 flow [2022-11-25 18:15:32,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 478 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:32,184 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 264 flow [2022-11-25 18:15:32,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2022-11-25 18:15:32,186 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2022-11-25 18:15:32,186 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 264 flow [2022-11-25 18:15:32,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.4) internal successors, (397), 5 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:32,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:32,187 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:32,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:15:32,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 18:15:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash 992632894, now seen corresponding path program 2 times [2022-11-25 18:15:32,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:32,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156246213] [2022-11-25 18:15:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:32,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:32,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156246213] [2022-11-25 18:15:32,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156246213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:32,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131424786] [2022-11-25 18:15:32,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:15:32,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:32,386 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:32,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:15:32,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:15:32,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:32,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:15:32,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:32,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:32,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131424786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:32,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:32,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-25 18:15:32,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367807975] [2022-11-25 18:15:32,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:32,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 18:15:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 18:15:32,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-11-25 18:15:33,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 207 [2022-11-25 18:15:33,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 264 flow. Second operand has 20 states, 20 states have (on average 74.85) internal successors, (1497), 20 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:33,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:33,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 207 [2022-11-25 18:15:33,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:35,076 INFO L130 PetriNetUnfolder]: 2596/5349 cut-off events. [2022-11-25 18:15:35,076 INFO L131 PetriNetUnfolder]: For 2353/2353 co-relation queries the response was YES. [2022-11-25 18:15:35,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14721 conditions, 5349 events. 2596/5349 cut-off events. For 2353/2353 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 44478 event pairs, 51 based on Foata normal form. 40/5386 useless extension candidates. Maximal degree in co-relation 14701. Up to 2529 conditions per place. [2022-11-25 18:15:35,125 INFO L137 encePairwiseOnDemand]: 189/207 looper letters, 100 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2022-11-25 18:15:35,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 146 transitions, 903 flow [2022-11-25 18:15:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:15:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:15:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 930 transitions. [2022-11-25 18:15:35,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40843214756258234 [2022-11-25 18:15:35,130 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 930 transitions. [2022-11-25 18:15:35,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 930 transitions. [2022-11-25 18:15:35,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:35,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 930 transitions. [2022-11-25 18:15:35,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.54545454545455) internal successors, (930), 11 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:35,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:35,141 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 207.0) internal successors, (2484), 12 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:35,141 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 264 flow. Second operand 11 states and 930 transitions. [2022-11-25 18:15:35,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 146 transitions, 903 flow [2022-11-25 18:15:35,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 146 transitions, 885 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 18:15:35,156 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 471 flow [2022-11-25 18:15:35,157 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=471, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2022-11-25 18:15:35,157 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2022-11-25 18:15:35,158 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 471 flow [2022-11-25 18:15:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 74.85) internal successors, (1497), 20 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:35,159 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:35,159 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:35,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:35,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:15:35,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-25 18:15:35,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:35,367 INFO L85 PathProgramCache]: Analyzing trace with hash -114603434, now seen corresponding path program 1 times [2022-11-25 18:15:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:35,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040073736] [2022-11-25 18:15:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:35,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:15:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:15:35,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:15:35,425 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:15:35,425 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 18:15:35,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-25 18:15:35,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-11-25 18:15:35,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-25 18:15:35,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-25 18:15:35,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-25 18:15:35,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-25 18:15:35,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 18:15:35,428 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-25 18:15:35,429 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:15:35,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-25 18:15:35,489 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:15:35,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 173 transitions, 436 flow [2022-11-25 18:15:35,521 INFO L130 PetriNetUnfolder]: 19/179 cut-off events. [2022-11-25 18:15:35,521 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 18:15:35,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 179 events. 19/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2022-11-25 18:15:35,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 173 transitions, 436 flow [2022-11-25 18:15:35,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 116 transitions, 280 flow [2022-11-25 18:15:35,525 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:15:35,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 116 transitions, 280 flow [2022-11-25 18:15:35,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 116 transitions, 280 flow [2022-11-25 18:15:35,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 116 transitions, 280 flow [2022-11-25 18:15:35,550 INFO L130 PetriNetUnfolder]: 19/179 cut-off events. [2022-11-25 18:15:35,550 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-25 18:15:35,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 179 events. 19/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 182. Up to 12 conditions per place. [2022-11-25 18:15:35,558 INFO L119 LiptonReduction]: Number of co-enabled transitions 6906 [2022-11-25 18:15:37,177 INFO L134 LiptonReduction]: Checked pairs total: 26239 [2022-11-25 18:15:37,177 INFO L136 LiptonReduction]: Total number of compositions: 66 [2022-11-25 18:15:37,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:15:37,179 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36ce4cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:15:37,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 18:15:37,182 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 18:15:37,182 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:15:37,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:37,183 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:15:37,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-25 18:15:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:37,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1180185612, now seen corresponding path program 1 times [2022-11-25 18:15:37,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:37,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242696277] [2022-11-25 18:15:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:37,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:37,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:37,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242696277] [2022-11-25 18:15:37,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242696277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:37,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:37,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:15:37,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447481376] [2022-11-25 18:15:37,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:37,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:37,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:37,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:37,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 239 [2022-11-25 18:15:37,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:37,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:37,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 239 [2022-11-25 18:15:37,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:56,439 INFO L130 PetriNetUnfolder]: 168857/211591 cut-off events. [2022-11-25 18:15:56,439 INFO L131 PetriNetUnfolder]: For 44365/44365 co-relation queries the response was YES. [2022-11-25 18:15:57,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430647 conditions, 211591 events. 168857/211591 cut-off events. For 44365/44365 co-relation queries the response was YES. Maximal size of possible extension queue 5305. Compared 1225492 event pairs, 57578 based on Foata normal form. 127/211716 useless extension candidates. Maximal degree in co-relation 430633. Up to 198999 conditions per place. [2022-11-25 18:15:58,221 INFO L137 encePairwiseOnDemand]: 224/239 looper letters, 43 selfloop transitions, 6 changer transitions 0/69 dead transitions. [2022-11-25 18:15:58,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 316 flow [2022-11-25 18:15:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2022-11-25 18:15:58,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49372384937238495 [2022-11-25 18:15:58,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2022-11-25 18:15:58,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2022-11-25 18:15:58,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:58,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2022-11-25 18:15:58,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,230 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 168 flow. Second operand 3 states and 354 transitions. [2022-11-25 18:15:58,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 316 flow [2022-11-25 18:15:58,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 283 flow, removed 16 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:58,249 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 171 flow [2022-11-25 18:15:58,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2022-11-25 18:15:58,249 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2022-11-25 18:15:58,250 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 171 flow [2022-11-25 18:15:58,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:58,250 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:58,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:15:58,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-25 18:15:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1636911036, now seen corresponding path program 1 times [2022-11-25 18:15:58,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:58,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547234563] [2022-11-25 18:15:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:58,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:58,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547234563] [2022-11-25 18:15:58,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547234563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:58,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:58,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:15:58,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456098686] [2022-11-25 18:15:58,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:58,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:15:58,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:58,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:15:58,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:15:58,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 239 [2022-11-25 18:15:58,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:58,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 239 [2022-11-25 18:15:58,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:58,772 INFO L130 PetriNetUnfolder]: 1396/4417 cut-off events. [2022-11-25 18:15:58,772 INFO L131 PetriNetUnfolder]: For 643/643 co-relation queries the response was YES. [2022-11-25 18:15:58,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8040 conditions, 4417 events. 1396/4417 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 38710 event pairs, 287 based on Foata normal form. 2922/7329 useless extension candidates. Maximal degree in co-relation 8024. Up to 1547 conditions per place. [2022-11-25 18:15:58,805 INFO L137 encePairwiseOnDemand]: 227/239 looper letters, 17 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2022-11-25 18:15:58,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 266 flow [2022-11-25 18:15:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:15:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:15:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2022-11-25 18:15:58,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5090655509065551 [2022-11-25 18:15:58,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2022-11-25 18:15:58,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2022-11-25 18:15:58,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:58,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2022-11-25 18:15:58,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,821 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 171 flow. Second operand 3 states and 365 transitions. [2022-11-25 18:15:58,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 266 flow [2022-11-25 18:15:58,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:58,823 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 189 flow [2022-11-25 18:15:58,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2022-11-25 18:15:58,825 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2022-11-25 18:15:58,825 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 189 flow [2022-11-25 18:15:58,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:58,827 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:58,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:15:58,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-25 18:15:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:58,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1366442431, now seen corresponding path program 1 times [2022-11-25 18:15:58,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:58,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848117391] [2022-11-25 18:15:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:58,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:58,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:58,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848117391] [2022-11-25 18:15:58,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848117391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:15:58,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:15:58,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:15:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810624733] [2022-11-25 18:15:58,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:15:58,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:15:58,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:58,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:15:58,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:15:58,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 239 [2022-11-25 18:15:58,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:58,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:58,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 239 [2022-11-25 18:15:58,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:15:59,884 INFO L130 PetriNetUnfolder]: 3489/7613 cut-off events. [2022-11-25 18:15:59,884 INFO L131 PetriNetUnfolder]: For 3021/3021 co-relation queries the response was YES. [2022-11-25 18:15:59,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19482 conditions, 7613 events. 3489/7613 cut-off events. For 3021/3021 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 66995 event pairs, 105 based on Foata normal form. 30/7641 useless extension candidates. Maximal degree in co-relation 19466. Up to 5469 conditions per place. [2022-11-25 18:15:59,922 INFO L137 encePairwiseOnDemand]: 222/239 looper letters, 75 selfloop transitions, 21 changer transitions 0/111 dead transitions. [2022-11-25 18:15:59,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 111 transitions, 617 flow [2022-11-25 18:15:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:15:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:15:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 625 transitions. [2022-11-25 18:15:59,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43584379358437936 [2022-11-25 18:15:59,926 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 625 transitions. [2022-11-25 18:15:59,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 625 transitions. [2022-11-25 18:15:59,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:15:59,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 625 transitions. [2022-11-25 18:15:59,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:59,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:59,933 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 239.0) internal successors, (1673), 7 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:59,933 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 189 flow. Second operand 6 states and 625 transitions. [2022-11-25 18:15:59,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 111 transitions, 617 flow [2022-11-25 18:15:59,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 111 transitions, 586 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:15:59,942 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 321 flow [2022-11-25 18:15:59,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2022-11-25 18:15:59,943 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2022-11-25 18:15:59,943 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 321 flow [2022-11-25 18:15:59,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:59,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:59,944 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:59,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:15:59,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-25 18:15:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1379178128, now seen corresponding path program 2 times [2022-11-25 18:15:59,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:59,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578843377] [2022-11-25 18:15:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:59,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578843377] [2022-11-25 18:16:00,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578843377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795025674] [2022-11-25 18:16:00,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:16:00,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:00,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:00,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:16:00,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:16:00,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:00,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:16:00,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:00,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795025674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:00,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:00,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-11-25 18:16:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581762361] [2022-11-25 18:16:00,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 18:16:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 18:16:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-11-25 18:16:00,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 239 [2022-11-25 18:16:01,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 321 flow. Second operand has 20 states, 20 states have (on average 84.85) internal successors, (1697), 20 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:01,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:01,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 239 [2022-11-25 18:16:01,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:02,853 INFO L130 PetriNetUnfolder]: 5880/11784 cut-off events. [2022-11-25 18:16:02,853 INFO L131 PetriNetUnfolder]: For 5362/5362 co-relation queries the response was YES. [2022-11-25 18:16:02,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32676 conditions, 11784 events. 5880/11784 cut-off events. For 5362/5362 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 108019 event pairs, 77 based on Foata normal form. 70/11852 useless extension candidates. Maximal degree in co-relation 32655. Up to 6521 conditions per place. [2022-11-25 18:16:02,926 INFO L137 encePairwiseOnDemand]: 217/239 looper letters, 122 selfloop transitions, 46 changer transitions 0/178 dead transitions. [2022-11-25 18:16:02,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 178 transitions, 1120 flow [2022-11-25 18:16:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:16:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:16:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1071 transitions. [2022-11-25 18:16:02,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40737923164701406 [2022-11-25 18:16:02,931 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1071 transitions. [2022-11-25 18:16:02,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1071 transitions. [2022-11-25 18:16:02,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:02,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1071 transitions. [2022-11-25 18:16:02,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 97.36363636363636) internal successors, (1071), 11 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:02,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 239.0) internal successors, (2868), 12 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:02,941 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 239.0) internal successors, (2868), 12 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:02,941 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 321 flow. Second operand 11 states and 1071 transitions. [2022-11-25 18:16:02,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 178 transitions, 1120 flow [2022-11-25 18:16:02,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 178 transitions, 1098 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:02,965 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 579 flow [2022-11-25 18:16:02,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=579, PETRI_PLACES=83, PETRI_TRANSITIONS=97} [2022-11-25 18:16:02,966 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 16 predicate places. [2022-11-25 18:16:02,966 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 579 flow [2022-11-25 18:16:02,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 84.85) internal successors, (1697), 20 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:02,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:02,968 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:02,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 18:16:03,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f574f304-ad55-4c0b-a4b0-aa1838a80ba1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:16:03,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-25 18:16:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:03,173 INFO L85 PathProgramCache]: Analyzing trace with hash 489921832, now seen corresponding path program 1 times [2022-11-25 18:16:03,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:03,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925642421] [2022-11-25 18:16:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:03,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:16:03,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:16:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:16:03,208 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:16:03,208 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:16:03,208 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-25 18:16:03,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-11-25 18:16:03,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2022-11-25 18:16:03,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-11-25 18:16:03,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-11-25 18:16:03,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-11-25 18:16:03,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-11-25 18:16:03,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-11-25 18:16:03,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 18:16:03,210 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-25 18:16:03,213 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:16:03,213 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-25 18:16:03,268 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:16:03,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 200 transitions, 520 flow [2022-11-25 18:16:03,299 INFO L130 PetriNetUnfolder]: 22/205 cut-off events. [2022-11-25 18:16:03,300 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:16:03,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 205 events. 22/205 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 406 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 240. Up to 14 conditions per place. [2022-11-25 18:16:03,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 200 transitions, 520 flow [2022-11-25 18:16:03,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 129 transitions, 321 flow [2022-11-25 18:16:03,304 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:16:03,304 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 129 transitions, 321 flow [2022-11-25 18:16:03,304 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 129 transitions, 321 flow [2022-11-25 18:16:03,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 129 transitions, 321 flow [2022-11-25 18:16:03,332 INFO L130 PetriNetUnfolder]: 22/205 cut-off events. [2022-11-25 18:16:03,332 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:16:03,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 205 events. 22/205 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 406 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 216. Up to 14 conditions per place. [2022-11-25 18:16:03,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 9140 [2022-11-25 18:16:04,990 INFO L134 LiptonReduction]: Checked pairs total: 35273 [2022-11-25 18:16:04,991 INFO L136 LiptonReduction]: Total number of compositions: 71 [2022-11-25 18:16:04,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:16:04,993 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36ce4cd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:16:04,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-25 18:16:04,995 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-11-25 18:16:04,996 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:16:04,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:04,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:16:04,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-25 18:16:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1464345342, now seen corresponding path program 1 times [2022-11-25 18:16:04,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:04,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450852451] [2022-11-25 18:16:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:05,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:05,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450852451] [2022-11-25 18:16:05,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450852451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:05,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:05,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:16:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190153665] [2022-11-25 18:16:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:05,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:05,068 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2022-11-25 18:16:05,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:05,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:05,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2022-11-25 18:16:05,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand