./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ --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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- 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-dbf71c6-m [2022-10-17 11:01:53,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:01:53,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:01:53,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:01:53,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:01:53,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:01:53,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:01:53,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:01:53,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:01:53,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:01:53,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:01:53,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:01:53,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:01:53,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:01:53,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:01:53,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:01:53,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:01:53,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:01:53,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:01:53,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:01:53,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:01:53,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:01:53,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:01:53,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:01:53,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:01:53,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:01:53,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:01:53,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:01:53,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:01:53,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:01:53,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:01:53,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:01:53,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:01:53,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:01:53,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:01:53,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:01:53,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:01:53,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:01:53,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:01:53,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:01:53,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:01:53,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:01:53,636 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:01:53,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:01:53,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:01:53,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:01:53,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:01:53,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:01:53,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:01:53,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:01:53,640 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:01:53,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:01:53,642 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:01:53,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:01:53,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:01:53,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:01:53,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:01:53,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:01:53,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:01:53,644 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:01:53,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:01:53,644 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:01:53,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:01:53,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:01:53,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:01:53,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:01:53,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:53,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:01:53,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:01:53,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:01:53,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:01:53,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:01:53,649 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:01:53,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:01:53,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:01:53,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2022-10-17 11:01:53,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:01:53,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:01:54,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:01:54,005 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:01:54,006 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:01:54,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread/stack_longer-2.i [2022-10-17 11:01:54,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/data/dc25f576f/c59efc9bed02435abf80ac0cb6d6e071/FLAG885604473 [2022-10-17 11:01:54,721 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:01:54,722 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/sv-benchmarks/c/pthread/stack_longer-2.i [2022-10-17 11:01:54,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/data/dc25f576f/c59efc9bed02435abf80ac0cb6d6e071/FLAG885604473 [2022-10-17 11:01:54,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/data/dc25f576f/c59efc9bed02435abf80ac0cb6d6e071 [2022-10-17 11:01:54,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:01:54,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:01:54,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:54,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:01:55,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:01:55,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:54" (1/1) ... [2022-10-17 11:01:55,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42771464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55, skipping insertion in model container [2022-10-17 11:01:55,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:54" (1/1) ... [2022-10-17 11:01:55,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:01:55,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:01:55,624 WARN L230 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_316bef3d-41c3-4ee8-98f4-a84211f78024/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-10-17 11:01:55,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:55,680 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:01:55,719 WARN L230 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_316bef3d-41c3-4ee8-98f4-a84211f78024/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-10-17 11:01:55,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:55,801 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:01:55,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55 WrapperNode [2022-10-17 11:01:55,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:55,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:55,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:01:55,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:01:55,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,870 INFO L138 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2022-10-17 11:01:55,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:55,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:01:55,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:01:55,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:01:55,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,926 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:01:55,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:01:55,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:01:55,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:01:55,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (1/1) ... [2022-10-17 11:01:55,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:55,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:01:55,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:01:56,032 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-10-17 11:01:56,032 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-10-17 11:01:56,032 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-10-17 11:01:56,033 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-10-17 11:01:56,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:01:56,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:01:56,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 11:01:56,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:01:56,034 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-10-17 11:01:56,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:01:56,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:01:56,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:01:56,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:01:56,037 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 11:01:56,198 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:01:56,201 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:01:56,572 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:01:56,584 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:01:56,585 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 11:01:56,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:56 BoogieIcfgContainer [2022-10-17 11:01:56,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:01:56,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:01:56,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:01:56,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:01:56,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:01:54" (1/3) ... [2022-10-17 11:01:56,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e538ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:56, skipping insertion in model container [2022-10-17 11:01:56,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:55" (2/3) ... [2022-10-17 11:01:56,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e538ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:56, skipping insertion in model container [2022-10-17 11:01:56,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:56" (3/3) ... [2022-10-17 11:01:56,599 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2022-10-17 11:01:56,610 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 11:01:56,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:01:56,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 11:01:56,623 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 11:01:56,797 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 11:01:56,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 360 flow [2022-10-17 11:01:57,007 INFO L130 PetriNetUnfolder]: 10/170 cut-off events. [2022-10-17 11:01:57,007 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 11:01:57,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 10/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 414 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-10-17 11:01:57,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 172 transitions, 360 flow [2022-10-17 11:01:57,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 160 transitions, 329 flow [2022-10-17 11:01:57,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:01:57,051 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;@65ce9d5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:01:57,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 11:01:57,098 INFO L130 PetriNetUnfolder]: 5/129 cut-off events. [2022-10-17 11:01:57,098 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 11:01:57,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:01:57,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:57,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 11:01:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2105074172, now seen corresponding path program 1 times [2022-10-17 11:01:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:57,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202364847] [2022-10-17 11:01:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:57,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:57,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:57,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202364847] [2022-10-17 11:01:57,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202364847] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:57,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:57,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883915452] [2022-10-17 11:01:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:57,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:57,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:57,776 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-10-17 11:01:57,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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) [2022-10-17 11:01:57,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:01:57,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-10-17 11:01:57,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:01:58,107 INFO L130 PetriNetUnfolder]: 88/699 cut-off events. [2022-10-17 11:01:58,108 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-10-17 11:01:58,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 699 events. 88/699 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3112 event pairs, 32 based on Foata normal form. 69/702 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-10-17 11:01:58,124 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 20 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2022-10-17 11:01:58,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 158 transitions, 377 flow [2022-10-17 11:01:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 11:01:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2022-10-17 11:01:58,155 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9282945736434108 [2022-10-17 11:01:58,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2022-10-17 11:01:58,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2022-10-17 11:01:58,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:01:58,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2022-10-17 11:01:58,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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) [2022-10-17 11:01:58,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-10-17 11:01:58,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-10-17 11:01:58,183 INFO L175 Difference]: Start difference. First operand has 157 places, 160 transitions, 329 flow. Second operand 3 states and 479 transitions. [2022-10-17 11:01:58,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 158 transitions, 377 flow [2022-10-17 11:01:58,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 158 transitions, 369 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-10-17 11:01:58,197 INFO L231 Difference]: Finished difference. Result has 153 places, 152 transitions, 323 flow [2022-10-17 11:01:58,199 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=153, PETRI_TRANSITIONS=152} [2022-10-17 11:01:58,203 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, -4 predicate places. [2022-10-17 11:01:58,203 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 152 transitions, 323 flow [2022-10-17 11:01:58,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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) [2022-10-17 11:01:58,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:01:58,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:58,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:01:58,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 11:01:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:58,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1103212847, now seen corresponding path program 1 times [2022-10-17 11:01:58,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:58,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574642267] [2022-10-17 11:01:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:58,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:58,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:58,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574642267] [2022-10-17 11:01:58,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574642267] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:58,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:58,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 11:01:58,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731291078] [2022-10-17 11:01:58,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 11:01:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 11:01:58,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 11:01:58,557 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 172 [2022-10-17 11:01:58,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 152 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 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) [2022-10-17 11:01:58,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:01:58,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 172 [2022-10-17 11:01:58,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:01:58,799 INFO L130 PetriNetUnfolder]: 34/590 cut-off events. [2022-10-17 11:01:58,800 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-10-17 11:01:58,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 590 events. 34/590 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2053 event pairs, 11 based on Foata normal form. 0/553 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-10-17 11:01:58,808 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 16 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2022-10-17 11:01:58,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 384 flow [2022-10-17 11:01:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 11:01:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 11:01:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-10-17 11:01:58,813 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9142441860465116 [2022-10-17 11:01:58,813 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-10-17 11:01:58,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-10-17 11:01:58,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:01:58,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-10-17 11:01:58,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 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) [2022-10-17 11:01:58,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2022-10-17 11:01:58,825 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2022-10-17 11:01:58,826 INFO L175 Difference]: Start difference. First operand has 153 places, 152 transitions, 323 flow. Second operand 4 states and 629 transitions. [2022-10-17 11:01:58,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 384 flow [2022-10-17 11:01:58,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 160 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 11:01:58,837 INFO L231 Difference]: Finished difference. Result has 157 places, 155 transitions, 348 flow [2022-10-17 11:01:58,837 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=157, PETRI_TRANSITIONS=155} [2022-10-17 11:01:58,838 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-10-17 11:01:58,839 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 155 transitions, 348 flow [2022-10-17 11:01:58,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 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) [2022-10-17 11:01:58,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:01:58,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:58,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:01:58,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 11:01:58,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1628458080, now seen corresponding path program 1 times [2022-10-17 11:01:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:58,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848539376] [2022-10-17 11:01:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:59,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848539376] [2022-10-17 11:01:59,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848539376] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:59,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:59,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:59,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981692948] [2022-10-17 11:01:59,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:59,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:59,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:59,079 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 172 [2022-10-17 11:01:59,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 155 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2022-10-17 11:01:59,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:01:59,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 172 [2022-10-17 11:01:59,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:01:59,420 INFO L130 PetriNetUnfolder]: 127/1267 cut-off events. [2022-10-17 11:01:59,420 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-10-17 11:01:59,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 1267 events. 127/1267 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6944 event pairs, 33 based on Foata normal form. 12/1205 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-10-17 11:01:59,435 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 25 selfloop transitions, 4 changer transitions 0/167 dead transitions. [2022-10-17 11:01:59,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 167 transitions, 439 flow [2022-10-17 11:01:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 11:01:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2022-10-17 11:01:59,439 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9186046511627907 [2022-10-17 11:01:59,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2022-10-17 11:01:59,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2022-10-17 11:01:59,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:01:59,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2022-10-17 11:01:59,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 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) [2022-10-17 11:01:59,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-10-17 11:01:59,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-10-17 11:01:59,447 INFO L175 Difference]: Start difference. First operand has 157 places, 155 transitions, 348 flow. Second operand 3 states and 474 transitions. [2022-10-17 11:01:59,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 167 transitions, 439 flow [2022-10-17 11:01:59,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 167 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 11:01:59,458 INFO L231 Difference]: Finished difference. Result has 160 places, 159 transitions, 388 flow [2022-10-17 11:01:59,459 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=160, PETRI_TRANSITIONS=159} [2022-10-17 11:01:59,462 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 3 predicate places. [2022-10-17 11:01:59,462 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 159 transitions, 388 flow [2022-10-17 11:01:59,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2022-10-17 11:01:59,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:01:59,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:59,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 11:01:59,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 11:01:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash 585023441, now seen corresponding path program 1 times [2022-10-17 11:01:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:59,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259625474] [2022-10-17 11:01:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:59,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:59,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:59,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259625474] [2022-10-17 11:01:59,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259625474] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:01:59,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886605332] [2022-10-17 11:01:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:59,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:01:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:59,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:01:59,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:01:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:59,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 11:02:00,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:00,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:00,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886605332] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:00,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:00,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 11:02:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272955275] [2022-10-17 11:02:00,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:00,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 11:02:00,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 11:02:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-10-17 11:02:00,521 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-10-17 11:02:00,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 159 transitions, 388 flow. Second operand has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 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) [2022-10-17 11:02:00,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:02:00,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-10-17 11:02:00,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:02:01,394 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([465] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][178], [Black: 174#(= ~top~0 0), 113#L945-2true, 30#L1008-1true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), 186#true, t2Thread1of1ForFork1InUse, 19#L1022-4true, 230#(<= ~top~0 0), Black: 188#(<= 1 ~top~0)]) [2022-10-17 11:02:01,399 INFO L383 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-10-17 11:02:01,399 INFO L386 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-10-17 11:02:01,399 INFO L386 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-10-17 11:02:01,400 INFO L386 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-10-17 11:02:01,400 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([464] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][179], [Black: 174#(= ~top~0 0), 72#L1010true, 113#L945-2true, Black: 182#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), 192#true, Black: 179#(= |t1Thread1of1ForFork0_push_#res#1| 0), t2Thread1of1ForFork1InUse, 19#L1022-4true, 188#(<= 1 ~top~0), Black: 186#true]) [2022-10-17 11:02:01,400 INFO L383 tUnfolder$Statistics]: this new event has 185 ancestors and is cut-off event [2022-10-17 11:02:01,400 INFO L386 tUnfolder$Statistics]: existing Event has 165 ancestors and is cut-off event [2022-10-17 11:02:01,401 INFO L386 tUnfolder$Statistics]: existing Event has 164 ancestors and is cut-off event [2022-10-17 11:02:01,401 INFO L386 tUnfolder$Statistics]: existing Event has 157 ancestors and is cut-off event [2022-10-17 11:02:01,532 INFO L130 PetriNetUnfolder]: 387/2990 cut-off events. [2022-10-17 11:02:01,532 INFO L131 PetriNetUnfolder]: For 1008/1064 co-relation queries the response was YES. [2022-10-17 11:02:01,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4470 conditions, 2990 events. 387/2990 cut-off events. For 1008/1064 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 21596 event pairs, 43 based on Foata normal form. 40/2871 useless extension candidates. Maximal degree in co-relation 3934. Up to 300 conditions per place. [2022-10-17 11:02:01,564 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 86 selfloop transitions, 46 changer transitions 1/269 dead transitions. [2022-10-17 11:02:01,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 269 transitions, 1070 flow [2022-10-17 11:02:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-17 11:02:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-10-17 11:02:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2759 transitions. [2022-10-17 11:02:01,575 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8911498708010336 [2022-10-17 11:02:01,575 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2759 transitions. [2022-10-17 11:02:01,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2759 transitions. [2022-10-17 11:02:01,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:02:01,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2759 transitions. [2022-10-17 11:02:01,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.27777777777777) internal successors, (2759), 18 states have internal predecessors, (2759), 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) [2022-10-17 11:02:01,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 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) [2022-10-17 11:02:01,603 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 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) [2022-10-17 11:02:01,603 INFO L175 Difference]: Start difference. First operand has 160 places, 159 transitions, 388 flow. Second operand 18 states and 2759 transitions. [2022-10-17 11:02:01,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 269 transitions, 1070 flow [2022-10-17 11:02:01,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 269 transitions, 1008 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-10-17 11:02:01,620 INFO L231 Difference]: Finished difference. Result has 181 places, 214 transitions, 759 flow [2022-10-17 11:02:01,621 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=759, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2022-10-17 11:02:01,622 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 24 predicate places. [2022-10-17 11:02:01,623 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 759 flow [2022-10-17 11:02:01,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 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) [2022-10-17 11:02:01,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:02:01,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:01,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:01,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:01,843 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 11:02:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:01,844 INFO L85 PathProgramCache]: Analyzing trace with hash -240965741, now seen corresponding path program 1 times [2022-10-17 11:02:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:01,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321918012] [2022-10-17 11:02:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:01,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:02,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321918012] [2022-10-17 11:02:02,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321918012] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:02,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:02,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:02:02,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655086381] [2022-10-17 11:02:02,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:02,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:02:02,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:02,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:02:02,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:02:02,101 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 172 [2022-10-17 11:02:02,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 759 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2022-10-17 11:02:02,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:02:02,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 172 [2022-10-17 11:02:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:02:02,343 INFO L130 PetriNetUnfolder]: 53/1113 cut-off events. [2022-10-17 11:02:02,343 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-10-17 11:02:02,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1113 events. 53/1113 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4912 event pairs, 9 based on Foata normal form. 17/1088 useless extension candidates. Maximal degree in co-relation 997. Up to 49 conditions per place. [2022-10-17 11:02:02,353 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-10-17 11:02:02,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 536 flow [2022-10-17 11:02:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:02:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 11:02:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-10-17 11:02:02,356 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9069767441860465 [2022-10-17 11:02:02,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-10-17 11:02:02,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-10-17 11:02:02,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:02:02,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-10-17 11:02:02,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2022-10-17 11:02:02,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-10-17 11:02:02,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2022-10-17 11:02:02,361 INFO L175 Difference]: Start difference. First operand has 181 places, 214 transitions, 759 flow. Second operand 3 states and 468 transitions. [2022-10-17 11:02:02,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 536 flow [2022-10-17 11:02:02,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 173 transitions, 514 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-10-17 11:02:02,368 INFO L231 Difference]: Finished difference. Result has 171 places, 171 transitions, 483 flow [2022-10-17 11:02:02,369 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=171, PETRI_TRANSITIONS=171} [2022-10-17 11:02:02,369 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 14 predicate places. [2022-10-17 11:02:02,370 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 171 transitions, 483 flow [2022-10-17 11:02:02,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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) [2022-10-17 11:02:02,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:02:02,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 11:02:02,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 11:02:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash 230931441, now seen corresponding path program 1 times [2022-10-17 11:02:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:02,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895495116] [2022-10-17 11:02:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:02,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:05,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895495116] [2022-10-17 11:02:05,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895495116] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:02:05,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:02:05,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-10-17 11:02:05,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121584836] [2022-10-17 11:02:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:05,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-17 11:02:05,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-17 11:02:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-10-17 11:02:05,356 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 172 [2022-10-17 11:02:05,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 171 transitions, 483 flow. Second operand has 30 states, 30 states have (on average 85.23333333333333) internal successors, (2557), 30 states have internal predecessors, (2557), 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) [2022-10-17 11:02:05,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:02:05,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 172 [2022-10-17 11:02:05,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:02:09,897 INFO L130 PetriNetUnfolder]: 1065/4236 cut-off events. [2022-10-17 11:02:09,897 INFO L131 PetriNetUnfolder]: For 781/781 co-relation queries the response was YES. [2022-10-17 11:02:09,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7972 conditions, 4236 events. 1065/4236 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 31527 event pairs, 73 based on Foata normal form. 0/4095 useless extension candidates. Maximal degree in co-relation 5815. Up to 1366 conditions per place. [2022-10-17 11:02:09,942 INFO L137 encePairwiseOnDemand]: 137/172 looper letters, 264 selfloop transitions, 37 changer transitions 2/379 dead transitions. [2022-10-17 11:02:09,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 1680 flow [2022-10-17 11:02:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-17 11:02:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-10-17 11:02:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3092 transitions. [2022-10-17 11:02:09,956 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5287277701778386 [2022-10-17 11:02:09,956 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3092 transitions. [2022-10-17 11:02:09,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3092 transitions. [2022-10-17 11:02:09,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:02:09,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3092 transitions. [2022-10-17 11:02:09,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 90.94117647058823) internal successors, (3092), 34 states have internal predecessors, (3092), 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) [2022-10-17 11:02:09,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 172.0) internal successors, (6020), 35 states have internal predecessors, (6020), 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) [2022-10-17 11:02:09,993 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 172.0) internal successors, (6020), 35 states have internal predecessors, (6020), 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) [2022-10-17 11:02:09,993 INFO L175 Difference]: Start difference. First operand has 171 places, 171 transitions, 483 flow. Second operand 34 states and 3092 transitions. [2022-10-17 11:02:09,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 1680 flow [2022-10-17 11:02:10,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 379 transitions, 1676 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 11:02:10,010 INFO L231 Difference]: Finished difference. Result has 226 places, 200 transitions, 724 flow [2022-10-17 11:02:10,010 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=226, PETRI_TRANSITIONS=200} [2022-10-17 11:02:10,014 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 69 predicate places. [2022-10-17 11:02:10,014 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 200 transitions, 724 flow [2022-10-17 11:02:10,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 85.23333333333333) internal successors, (2557), 30 states have internal predecessors, (2557), 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) [2022-10-17 11:02:10,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:02:10,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:10,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 11:02:10,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 11:02:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:10,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1232739005, now seen corresponding path program 1 times [2022-10-17 11:02:10,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:10,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384632267] [2022-10-17 11:02:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:10,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384632267] [2022-10-17 11:02:10,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384632267] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:10,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963942605] [2022-10-17 11:02:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:10,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:10,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:10,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:10,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:02:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 11:02:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 11:02:10,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 11:02:10,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963942605] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:02:10,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:02:10,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-10-17 11:02:10,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571981279] [2022-10-17 11:02:10,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:02:10,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 11:02:10,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 11:02:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-10-17 11:02:10,964 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 172 [2022-10-17 11:02:10,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 200 transitions, 724 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 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) [2022-10-17 11:02:10,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:02:10,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 172 [2022-10-17 11:02:10,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:02:11,760 INFO L130 PetriNetUnfolder]: 147/1995 cut-off events. [2022-10-17 11:02:11,761 INFO L131 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2022-10-17 11:02:11,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3517 conditions, 1995 events. 147/1995 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12044 event pairs, 27 based on Foata normal form. 9/1962 useless extension candidates. Maximal degree in co-relation 2527. Up to 76 conditions per place. [2022-10-17 11:02:11,786 INFO L137 encePairwiseOnDemand]: 161/172 looper letters, 50 selfloop transitions, 39 changer transitions 0/243 dead transitions. [2022-10-17 11:02:11,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 243 transitions, 1070 flow [2022-10-17 11:02:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-17 11:02:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-10-17 11:02:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2665 transitions. [2022-10-17 11:02:11,797 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8607881136950905 [2022-10-17 11:02:11,797 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2665 transitions. [2022-10-17 11:02:11,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2665 transitions. [2022-10-17 11:02:11,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:02:11,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2665 transitions. [2022-10-17 11:02:11,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.05555555555554) internal successors, (2665), 18 states have internal predecessors, (2665), 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) [2022-10-17 11:02:11,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 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) [2022-10-17 11:02:11,821 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 172.0) internal successors, (3268), 19 states have internal predecessors, (3268), 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) [2022-10-17 11:02:11,821 INFO L175 Difference]: Start difference. First operand has 226 places, 200 transitions, 724 flow. Second operand 18 states and 2665 transitions. [2022-10-17 11:02:11,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 243 transitions, 1070 flow [2022-10-17 11:02:11,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 243 transitions, 1052 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-10-17 11:02:11,841 INFO L231 Difference]: Finished difference. Result has 240 places, 212 transitions, 892 flow [2022-10-17 11:02:11,842 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=892, PETRI_PLACES=240, PETRI_TRANSITIONS=212} [2022-10-17 11:02:11,843 INFO L287 CegarLoopForPetriNet]: 157 programPoint places, 83 predicate places. [2022-10-17 11:02:11,843 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 212 transitions, 892 flow [2022-10-17 11:02:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 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) [2022-10-17 11:02:11,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:02:11,845 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:02:11,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:02:12,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:12,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 11:02:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:02:12,067 INFO L85 PathProgramCache]: Analyzing trace with hash 228903536, now seen corresponding path program 1 times [2022-10-17 11:02:12,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:02:12,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311459238] [2022-10-17 11:02:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:12,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:02:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 11:02:14,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:02:14,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311459238] [2022-10-17 11:02:14,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311459238] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:14,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390248762] [2022-10-17 11:02:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:02:14,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:02:14,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:02:14,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:02:14,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_316bef3d-41c3-4ee8-98f4-a84211f78024/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 11:02:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:02:14,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-10-17 11:02:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:02:16,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-10-17 11:02:17,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-10-17 11:02:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:02:17,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:02:18,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-10-17 11:02:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 11:02:19,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390248762] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 11:02:19,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:02:19,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [23, 26] total 66 [2022-10-17 11:02:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830653464] [2022-10-17 11:02:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:02:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-17 11:02:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:02:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-17 11:02:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4050, Unknown=0, NotChecked=0, Total=4290 [2022-10-17 11:02:19,368 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 172 [2022-10-17 11:02:19,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 212 transitions, 892 flow. Second operand has 22 states, 22 states have (on average 100.45454545454545) internal successors, (2210), 22 states have internal predecessors, (2210), 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) [2022-10-17 11:02:19,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:02:19,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 172 [2022-10-17 11:02:19,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand