./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN --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 b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:39:12,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:39:12,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:39:12,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:39:12,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:39:12,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:39:12,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:39:12,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:39:12,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:39:12,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:39:12,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:39:12,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:39:12,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:39:12,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:39:12,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:39:12,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:39:12,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:39:12,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:39:12,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:39:12,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:39:12,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:39:12,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:39:12,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:39:12,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:39:12,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:39:12,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:39:12,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:39:12,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:39:12,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:39:12,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:39:12,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:39:12,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:39:12,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:39:12,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:39:12,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:39:12,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:39:12,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:39:12,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:39:12,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:39:12,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:39:12,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:39:12,540 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:39:12,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:39:12,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:39:12,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:39:12,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:39:12,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:39:12,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:39:12,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:39:12,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:39:12,588 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:39:12,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:39:12,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:39:12,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:39:12,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:39:12,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:39:12,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:39:12,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:39:12,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:39:12,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:39:12,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:39:12,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:39:12,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:39:12,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:39:12,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:39:12,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:39:12,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:39:12,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:39:12,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:39:12,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:39:12,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:39:12,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:39:12,595 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:39:12,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:39:12,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:39:12,596 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_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3e7d0a2f10d1449a9a354d4032bafdd0ae7a7fd76aceb835acbee3134ec74e4 [2022-11-20 11:39:12,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:39:12,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:39:12,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:39:12,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:39:12,975 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:39:12,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2022-11-20 11:39:16,032 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:39:16,309 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:39:16,310 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i [2022-11-20 11:39:16,336 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/data/f76d1c2c2/6bd84d3fbd9d40099039b043a7f4fb22/FLAG6bf0ee091 [2022-11-20 11:39:16,361 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/data/f76d1c2c2/6bd84d3fbd9d40099039b043a7f4fb22 [2022-11-20 11:39:16,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:39:16,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:39:16,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:39:16,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:39:16,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:39:16,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72841d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16, skipping insertion in model container [2022-11-20 11:39:16,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:39:16,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:39:16,725 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2022-11-20 11:39:16,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:39:16,759 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:39:16,791 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/sv-benchmarks/c/goblint-regression/28-race_reach_02-simple_racefree.i[30176,30189] [2022-11-20 11:39:16,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:39:16,850 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:39:16,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16 WrapperNode [2022-11-20 11:39:16,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:39:16,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:39:16,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:39:16,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:39:16,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,927 INFO L138 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-11-20 11:39:16,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:39:16,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:39:16,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:39:16,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:39:16,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:16,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:39:16,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:39:16,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:39:16,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:39:16,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (1/1) ... [2022-11-20 11:39:17,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:39:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:17,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:39:17,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:39:17,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:39:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:39:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:39:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:39:17,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:39:17,084 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 11:39:17,084 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 11:39:17,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:39:17,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:39:17,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:39:17,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:39:17,087 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:39:17,287 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:39:17,304 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:39:17,522 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:39:17,530 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:39:17,531 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-20 11:39:17,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:39:17 BoogieIcfgContainer [2022-11-20 11:39:17,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:39:17,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:39:17,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:39:17,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:39:17,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:39:16" (1/3) ... [2022-11-20 11:39:17,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18450526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:39:17, skipping insertion in model container [2022-11-20 11:39:17,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:16" (2/3) ... [2022-11-20 11:39:17,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18450526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:39:17, skipping insertion in model container [2022-11-20 11:39:17,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:39:17" (3/3) ... [2022-11-20 11:39:17,543 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2022-11-20 11:39:17,553 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:39:17,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:39:17,564 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:39:17,565 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:39:17,650 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 11:39:17,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2022-11-20 11:39:17,787 INFO L130 PetriNetUnfolder]: 17/150 cut-off events. [2022-11-20 11:39:17,788 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:39:17,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 150 events. 17/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 327 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2022-11-20 11:39:17,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2022-11-20 11:39:17,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 109 transitions, 223 flow [2022-11-20 11:39:17,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:39:17,817 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;@1207dc59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:39:17,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:39:17,867 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2022-11-20 11:39:17,867 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:39:17,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:17,869 INFO L209 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] [2022-11-20 11:39:17,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash 350141975, now seen corresponding path program 1 times [2022-11-20 11:39:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:17,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888195014] [2022-11-20 11:39:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:17,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:18,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:18,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888195014] [2022-11-20 11:39:18,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888195014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:18,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:18,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923031602] [2022-11-20 11:39:18,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:18,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:39:18,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:18,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:39:18,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:39:18,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 114 [2022-11-20 11:39:18,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 223 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:18,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 114 [2022-11-20 11:39:18,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:18,254 INFO L130 PetriNetUnfolder]: 0/127 cut-off events. [2022-11-20 11:39:18,254 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:39:18,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 127 events. 0/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 195 event pairs, 0 based on Foata normal form. 16/137 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-20 11:39:18,256 INFO L137 encePairwiseOnDemand]: 103/114 looper letters, 1 selfloop transitions, 0 changer transitions 15/97 dead transitions. [2022-11-20 11:39:18,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 97 transitions, 201 flow [2022-11-20 11:39:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:39:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:39:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 212 transitions. [2022-11-20 11:39:18,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9298245614035088 [2022-11-20 11:39:18,271 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 212 transitions. [2022-11-20 11:39:18,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 212 transitions. [2022-11-20 11:39:18,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:18,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 212 transitions. [2022-11-20 11:39:18,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 106.0) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,283 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,285 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 223 flow. Second operand 2 states and 212 transitions. [2022-11-20 11:39:18,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 97 transitions, 201 flow [2022-11-20 11:39:18,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 201 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:18,293 INFO L231 Difference]: Finished difference. Result has 101 places, 82 transitions, 169 flow [2022-11-20 11:39:18,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=169, PETRI_PLACES=101, PETRI_TRANSITIONS=82} [2022-11-20 11:39:18,299 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 0 predicate places. [2022-11-20 11:39:18,300 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 82 transitions, 169 flow [2022-11-20 11:39:18,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:18,301 INFO L209 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] [2022-11-20 11:39:18,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:39:18,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:18,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:18,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1446809384, now seen corresponding path program 1 times [2022-11-20 11:39:18,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:18,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953892970] [2022-11-20 11:39:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:18,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:18,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:18,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953892970] [2022-11-20 11:39:18,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953892970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:18,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:18,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171118940] [2022-11-20 11:39:18,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:18,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:18,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:18,507 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 114 [2022-11-20 11:39:18,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 82 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:18,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 114 [2022-11-20 11:39:18,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:18,545 INFO L130 PetriNetUnfolder]: 0/86 cut-off events. [2022-11-20 11:39:18,545 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:39:18,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 86 events. 0/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-20 11:39:18,546 INFO L137 encePairwiseOnDemand]: 111/114 looper letters, 8 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-11-20 11:39:18,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 193 flow [2022-11-20 11:39:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:39:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-11-20 11:39:18,549 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.847953216374269 [2022-11-20 11:39:18,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-11-20 11:39:18,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-11-20 11:39:18,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:18,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-11-20 11:39:18,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,555 INFO L175 Difference]: Start difference. First operand has 101 places, 82 transitions, 169 flow. Second operand 3 states and 290 transitions. [2022-11-20 11:39:18,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 193 flow [2022-11-20 11:39:18,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:18,558 INFO L231 Difference]: Finished difference. Result has 89 places, 82 transitions, 177 flow [2022-11-20 11:39:18,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=89, PETRI_TRANSITIONS=82} [2022-11-20 11:39:18,559 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2022-11-20 11:39:18,559 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 82 transitions, 177 flow [2022-11-20 11:39:18,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:18,560 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:39:18,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:39:18,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash 515695535, now seen corresponding path program 1 times [2022-11-20 11:39:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:18,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879374772] [2022-11-20 11:39:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:18,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:39:18,596 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:39:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:39:18,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:39:18,640 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:39:18,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:39:18,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:39:18,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:39:18,644 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 11:39:18,647 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:39:18,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:39:18,671 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:39:18,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 144 transitions, 306 flow [2022-11-20 11:39:18,736 INFO L130 PetriNetUnfolder]: 31/241 cut-off events. [2022-11-20 11:39:18,737 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:39:18,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 241 events. 31/241 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 667 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2022-11-20 11:39:18,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 144 transitions, 306 flow [2022-11-20 11:39:18,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 144 transitions, 306 flow [2022-11-20 11:39:18,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:39:18,748 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;@1207dc59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:39:18,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:39:18,760 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2022-11-20 11:39:18,761 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:39:18,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:18,761 INFO L209 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] [2022-11-20 11:39:18,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash -804450649, now seen corresponding path program 1 times [2022-11-20 11:39:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:18,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498326655] [2022-11-20 11:39:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:18,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:18,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498326655] [2022-11-20 11:39:18,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498326655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:18,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:18,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:18,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445784298] [2022-11-20 11:39:18,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:18,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:39:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:39:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:39:18,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 144 [2022-11-20 11:39:18,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 144 transitions, 306 flow. Second operand has 2 states, 2 states have (on average 122.5) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:18,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 144 [2022-11-20 11:39:18,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:18,858 INFO L130 PetriNetUnfolder]: 3/210 cut-off events. [2022-11-20 11:39:18,858 INFO L131 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-11-20 11:39:18,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 210 events. 3/210 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 514 event pairs, 0 based on Foata normal form. 42/242 useless extension candidates. Maximal degree in co-relation 136. Up to 7 conditions per place. [2022-11-20 11:39:18,860 INFO L137 encePairwiseOnDemand]: 127/144 looper letters, 2 selfloop transitions, 0 changer transitions 21/126 dead transitions. [2022-11-20 11:39:18,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 126 transitions, 278 flow [2022-11-20 11:39:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:39:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:39:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 265 transitions. [2022-11-20 11:39:18,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9201388888888888 [2022-11-20 11:39:18,863 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 265 transitions. [2022-11-20 11:39:18,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 265 transitions. [2022-11-20 11:39:18,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:18,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 265 transitions. [2022-11-20 11:39:18,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,867 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,867 INFO L175 Difference]: Start difference. First operand has 130 places, 144 transitions, 306 flow. Second operand 2 states and 265 transitions. [2022-11-20 11:39:18,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 126 transitions, 278 flow [2022-11-20 11:39:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 126 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:18,871 INFO L231 Difference]: Finished difference. Result has 130 places, 105 transitions, 222 flow [2022-11-20 11:39:18,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=222, PETRI_PLACES=130, PETRI_TRANSITIONS=105} [2022-11-20 11:39:18,873 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, 0 predicate places. [2022-11-20 11:39:18,873 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 105 transitions, 222 flow [2022-11-20 11:39:18,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 122.5) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:18,874 INFO L209 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] [2022-11-20 11:39:18,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:39:18,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:18,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1693565288, now seen corresponding path program 1 times [2022-11-20 11:39:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:18,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015757382] [2022-11-20 11:39:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:18,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015757382] [2022-11-20 11:39:18,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015757382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:18,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:18,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050625910] [2022-11-20 11:39:18,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:18,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:18,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:18,987 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 144 [2022-11-20 11:39:18,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 105 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:18,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:18,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 144 [2022-11-20 11:39:18,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:19,056 INFO L130 PetriNetUnfolder]: 0/129 cut-off events. [2022-11-20 11:39:19,056 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:39:19,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 129 events. 0/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-20 11:39:19,057 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 11 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2022-11-20 11:39:19,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 109 transitions, 256 flow [2022-11-20 11:39:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:39:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2022-11-20 11:39:19,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8310185185185185 [2022-11-20 11:39:19,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2022-11-20 11:39:19,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2022-11-20 11:39:19,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:19,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2022-11-20 11:39:19,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,063 INFO L175 Difference]: Start difference. First operand has 130 places, 105 transitions, 222 flow. Second operand 3 states and 359 transitions. [2022-11-20 11:39:19,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 109 transitions, 256 flow [2022-11-20 11:39:19,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 109 transitions, 254 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:19,067 INFO L231 Difference]: Finished difference. Result has 114 places, 106 transitions, 232 flow [2022-11-20 11:39:19,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=114, PETRI_TRANSITIONS=106} [2022-11-20 11:39:19,068 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, -16 predicate places. [2022-11-20 11:39:19,068 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 106 transitions, 232 flow [2022-11-20 11:39:19,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:19,069 INFO L209 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] [2022-11-20 11:39:19,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:39:19,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 729405808, now seen corresponding path program 1 times [2022-11-20 11:39:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:19,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817648859] [2022-11-20 11:39:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:19,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:19,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817648859] [2022-11-20 11:39:19,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817648859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997960506] [2022-11-20 11:39:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:19,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:19,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:19,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:19,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:39:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:19,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:39:19,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:19,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:19,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997960506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:19,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:19,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:39:19,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10606214] [2022-11-20 11:39:19,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:19,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:39:19,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:19,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:39:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:39:19,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 144 [2022-11-20 11:39:19,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 106 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 116.3) internal successors, (1163), 10 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:19,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 144 [2022-11-20 11:39:19,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:19,531 INFO L130 PetriNetUnfolder]: 0/107 cut-off events. [2022-11-20 11:39:19,531 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:39:19,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 107 events. 0/107 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-20 11:39:19,532 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 9 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2022-11-20 11:39:19,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 101 transitions, 252 flow [2022-11-20 11:39:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:39:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:39:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1044 transitions. [2022-11-20 11:39:19,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2022-11-20 11:39:19,536 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1044 transitions. [2022-11-20 11:39:19,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1044 transitions. [2022-11-20 11:39:19,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:19,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1044 transitions. [2022-11-20 11:39:19,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.0) internal successors, (1044), 9 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,544 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,544 INFO L175 Difference]: Start difference. First operand has 114 places, 106 transitions, 232 flow. Second operand 9 states and 1044 transitions. [2022-11-20 11:39:19,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 101 transitions, 252 flow [2022-11-20 11:39:19,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 101 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:19,547 INFO L231 Difference]: Finished difference. Result has 110 places, 97 transitions, 224 flow [2022-11-20 11:39:19,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=224, PETRI_PLACES=110, PETRI_TRANSITIONS=97} [2022-11-20 11:39:19,548 INFO L288 CegarLoopForPetriNet]: 130 programPoint places, -20 predicate places. [2022-11-20 11:39:19,548 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 97 transitions, 224 flow [2022-11-20 11:39:19,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.3) internal successors, (1163), 10 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:19,550 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-20 11:39:19,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:39:19,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:19,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1971921984, now seen corresponding path program 1 times [2022-11-20 11:39:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:19,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515610173] [2022-11-20 11:39:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:19,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:39:19,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:39:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:39:19,831 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:39:19,831 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:39:19,831 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:39:19,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:39:19,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:39:19,832 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:39:19,833 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:39:19,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 11:39:19,858 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:39:19,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 174 transitions, 378 flow [2022-11-20 11:39:19,913 INFO L130 PetriNetUnfolder]: 50/365 cut-off events. [2022-11-20 11:39:19,913 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 11:39:19,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 365 events. 50/365 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1163 event pairs, 1 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 249. Up to 16 conditions per place. [2022-11-20 11:39:19,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 174 transitions, 378 flow [2022-11-20 11:39:19,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 174 transitions, 378 flow [2022-11-20 11:39:19,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:39:19,923 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;@1207dc59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:39:19,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:39:19,932 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2022-11-20 11:39:19,932 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:39:19,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:19,932 INFO L209 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] [2022-11-20 11:39:19,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2095383893, now seen corresponding path program 1 times [2022-11-20 11:39:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:19,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983945027] [2022-11-20 11:39:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:19,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983945027] [2022-11-20 11:39:19,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983945027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:19,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:19,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:19,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328493465] [2022-11-20 11:39:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:19,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:39:19,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:39:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:39:19,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 174 [2022-11-20 11:39:19,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 174 transitions, 378 flow. Second operand has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:19,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:19,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 174 [2022-11-20 11:39:19,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:20,056 INFO L130 PetriNetUnfolder]: 8/319 cut-off events. [2022-11-20 11:39:20,056 INFO L131 PetriNetUnfolder]: For 53/63 co-relation queries the response was YES. [2022-11-20 11:39:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 319 events. 8/319 cut-off events. For 53/63 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 976 event pairs, 1 based on Foata normal form. 106/409 useless extension candidates. Maximal degree in co-relation 224. Up to 16 conditions per place. [2022-11-20 11:39:20,058 INFO L137 encePairwiseOnDemand]: 151/174 looper letters, 3 selfloop transitions, 0 changer transitions 22/150 dead transitions. [2022-11-20 11:39:20,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 150 transitions, 342 flow [2022-11-20 11:39:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:39:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:39:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2022-11-20 11:39:20,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9109195402298851 [2022-11-20 11:39:20,060 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2022-11-20 11:39:20,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2022-11-20 11:39:20,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:20,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2022-11-20 11:39:20,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,064 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,064 INFO L175 Difference]: Start difference. First operand has 155 places, 174 transitions, 378 flow. Second operand 2 states and 317 transitions. [2022-11-20 11:39:20,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 150 transitions, 342 flow [2022-11-20 11:39:20,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:20,068 INFO L231 Difference]: Finished difference. Result has 155 places, 128 transitions, 277 flow [2022-11-20 11:39:20,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=277, PETRI_PLACES=155, PETRI_TRANSITIONS=128} [2022-11-20 11:39:20,070 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-20 11:39:20,070 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 128 transitions, 277 flow [2022-11-20 11:39:20,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:20,071 INFO L209 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] [2022-11-20 11:39:20,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:39:20,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash 298432534, now seen corresponding path program 1 times [2022-11-20 11:39:20,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:20,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520506102] [2022-11-20 11:39:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:20,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:20,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:20,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520506102] [2022-11-20 11:39:20,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520506102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:20,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:20,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:20,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255601620] [2022-11-20 11:39:20,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:20,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:20,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:20,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 174 [2022-11-20 11:39:20,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 128 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:20,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 174 [2022-11-20 11:39:20,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:20,223 INFO L130 PetriNetUnfolder]: 0/172 cut-off events. [2022-11-20 11:39:20,223 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 11:39:20,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 172 events. 0/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 330 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-20 11:39:20,224 INFO L137 encePairwiseOnDemand]: 171/174 looper letters, 12 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2022-11-20 11:39:20,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 132 transitions, 313 flow [2022-11-20 11:39:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:39:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2022-11-20 11:39:20,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-11-20 11:39:20,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2022-11-20 11:39:20,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2022-11-20 11:39:20,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:20,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2022-11-20 11:39:20,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,232 INFO L175 Difference]: Start difference. First operand has 155 places, 128 transitions, 277 flow. Second operand 3 states and 426 transitions. [2022-11-20 11:39:20,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 132 transitions, 313 flow [2022-11-20 11:39:20,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 132 transitions, 307 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:20,236 INFO L231 Difference]: Finished difference. Result has 139 places, 129 transitions, 283 flow [2022-11-20 11:39:20,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=139, PETRI_TRANSITIONS=129} [2022-11-20 11:39:20,238 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -16 predicate places. [2022-11-20 11:39:20,239 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 129 transitions, 283 flow [2022-11-20 11:39:20,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:20,239 INFO L209 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] [2022-11-20 11:39:20,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:39:20,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1411654522, now seen corresponding path program 1 times [2022-11-20 11:39:20,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:20,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086912208] [2022-11-20 11:39:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:20,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:20,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086912208] [2022-11-20 11:39:20,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086912208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145958764] [2022-11-20 11:39:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:20,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:20,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:20,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:20,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:39:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:39:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:20,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:20,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145958764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:20,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:20,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:39:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015967335] [2022-11-20 11:39:20,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:20,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:39:20,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:39:20,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:39:20,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 174 [2022-11-20 11:39:20,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 129 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:20,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 174 [2022-11-20 11:39:20,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:20,705 INFO L130 PetriNetUnfolder]: 0/150 cut-off events. [2022-11-20 11:39:20,705 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 11:39:20,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 150 events. 0/150 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 203 event pairs, 0 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-20 11:39:20,706 INFO L137 encePairwiseOnDemand]: 168/174 looper letters, 13 selfloop transitions, 9 changer transitions 0/139 dead transitions. [2022-11-20 11:39:20,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 139 transitions, 349 flow [2022-11-20 11:39:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:39:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:39:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1248 transitions. [2022-11-20 11:39:20,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7969348659003831 [2022-11-20 11:39:20,710 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1248 transitions. [2022-11-20 11:39:20,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1248 transitions. [2022-11-20 11:39:20,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:20,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1248 transitions. [2022-11-20 11:39:20,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 138.66666666666666) internal successors, (1248), 9 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 174.0) internal successors, (1740), 10 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,717 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 174.0) internal successors, (1740), 10 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,718 INFO L175 Difference]: Start difference. First operand has 139 places, 129 transitions, 283 flow. Second operand 9 states and 1248 transitions. [2022-11-20 11:39:20,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 139 transitions, 349 flow [2022-11-20 11:39:20,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 139 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:20,722 INFO L231 Difference]: Finished difference. Result has 149 places, 135 transitions, 331 flow [2022-11-20 11:39:20,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=331, PETRI_PLACES=149, PETRI_TRANSITIONS=135} [2022-11-20 11:39:20,726 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -6 predicate places. [2022-11-20 11:39:20,726 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 135 transitions, 331 flow [2022-11-20 11:39:20,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:20,727 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:20,728 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:20,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:20,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:39:20,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash 592901800, now seen corresponding path program 1 times [2022-11-20 11:39:20,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:20,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102373685] [2022-11-20 11:39:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:20,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:39:20,967 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:39:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:39:21,005 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:39:21,007 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:39:21,007 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:39:21,007 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:39:21,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:39:21,008 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:39:21,009 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:39:21,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 11:39:21,041 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:39:21,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 204 transitions, 452 flow [2022-11-20 11:39:21,194 INFO L130 PetriNetUnfolder]: 81/557 cut-off events. [2022-11-20 11:39:21,195 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 11:39:21,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 557 events. 81/557 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2087 event pairs, 6 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 385. Up to 32 conditions per place. [2022-11-20 11:39:21,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 204 transitions, 452 flow [2022-11-20 11:39:21,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 204 transitions, 452 flow [2022-11-20 11:39:21,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:39:21,208 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@1207dc59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:39:21,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:39:21,222 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2022-11-20 11:39:21,223 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:39:21,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:21,223 INFO L209 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] [2022-11-20 11:39:21,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash 459711009, now seen corresponding path program 1 times [2022-11-20 11:39:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180569625] [2022-11-20 11:39:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:21,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:21,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180569625] [2022-11-20 11:39:21,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180569625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:21,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:21,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376246219] [2022-11-20 11:39:21,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:21,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:39:21,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:39:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:39:21,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 204 [2022-11-20 11:39:21,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 204 transitions, 452 flow. Second operand has 2 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:21,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 204 [2022-11-20 11:39:21,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:21,399 INFO L130 PetriNetUnfolder]: 21/492 cut-off events. [2022-11-20 11:39:21,399 INFO L131 PetriNetUnfolder]: For 125/141 co-relation queries the response was YES. [2022-11-20 11:39:21,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 492 events. 21/492 cut-off events. For 125/141 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1893 event pairs, 6 based on Foata normal form. 252/718 useless extension candidates. Maximal degree in co-relation 354. Up to 37 conditions per place. [2022-11-20 11:39:21,402 INFO L137 encePairwiseOnDemand]: 175/204 looper letters, 4 selfloop transitions, 0 changer transitions 23/174 dead transitions. [2022-11-20 11:39:21,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 174 transitions, 408 flow [2022-11-20 11:39:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:39:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:39:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 369 transitions. [2022-11-20 11:39:21,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9044117647058824 [2022-11-20 11:39:21,405 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 369 transitions. [2022-11-20 11:39:21,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 369 transitions. [2022-11-20 11:39:21,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:21,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 369 transitions. [2022-11-20 11:39:21,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,407 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,408 INFO L175 Difference]: Start difference. First operand has 180 places, 204 transitions, 452 flow. Second operand 2 states and 369 transitions. [2022-11-20 11:39:21,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 174 transitions, 408 flow [2022-11-20 11:39:21,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 174 transitions, 408 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:21,413 INFO L231 Difference]: Finished difference. Result has 180 places, 151 transitions, 334 flow [2022-11-20 11:39:21,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=334, PETRI_PLACES=180, PETRI_TRANSITIONS=151} [2022-11-20 11:39:21,415 INFO L288 CegarLoopForPetriNet]: 180 programPoint places, 0 predicate places. [2022-11-20 11:39:21,415 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 151 transitions, 334 flow [2022-11-20 11:39:21,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:21,416 INFO L209 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] [2022-11-20 11:39:21,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:39:21,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:21,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1337240350, now seen corresponding path program 1 times [2022-11-20 11:39:21,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:21,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511625890] [2022-11-20 11:39:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:21,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:21,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:21,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511625890] [2022-11-20 11:39:21,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511625890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:21,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:21,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:21,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154155632] [2022-11-20 11:39:21,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:21,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:21,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:21,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:21,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:21,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 204 [2022-11-20 11:39:21,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 151 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:21,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 204 [2022-11-20 11:39:21,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:21,523 INFO L130 PetriNetUnfolder]: 0/215 cut-off events. [2022-11-20 11:39:21,523 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 11:39:21,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 215 events. 0/215 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 471 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-20 11:39:21,524 INFO L137 encePairwiseOnDemand]: 201/204 looper letters, 13 selfloop transitions, 2 changer transitions 0/155 dead transitions. [2022-11-20 11:39:21,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 155 transitions, 372 flow [2022-11-20 11:39:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:39:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2022-11-20 11:39:21,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2022-11-20 11:39:21,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2022-11-20 11:39:21,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2022-11-20 11:39:21,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:21,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2022-11-20 11:39:21,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,530 INFO L175 Difference]: Start difference. First operand has 180 places, 151 transitions, 334 flow. Second operand 3 states and 493 transitions. [2022-11-20 11:39:21,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 155 transitions, 372 flow [2022-11-20 11:39:21,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 155 transitions, 360 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:21,534 INFO L231 Difference]: Finished difference. Result has 164 places, 152 transitions, 334 flow [2022-11-20 11:39:21,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=164, PETRI_TRANSITIONS=152} [2022-11-20 11:39:21,536 INFO L288 CegarLoopForPetriNet]: 180 programPoint places, -16 predicate places. [2022-11-20 11:39:21,536 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 152 transitions, 334 flow [2022-11-20 11:39:21,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:21,536 INFO L209 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] [2022-11-20 11:39:21,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:39:21,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2100152094, now seen corresponding path program 1 times [2022-11-20 11:39:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:21,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569574149] [2022-11-20 11:39:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:21,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:21,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:21,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569574149] [2022-11-20 11:39:21,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569574149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:21,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056109457] [2022-11-20 11:39:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:21,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:21,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:21,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:21,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:39:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:21,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:39:21,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056109457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:21,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:21,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:39:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803735664] [2022-11-20 11:39:21,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:39:21,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:39:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:39:21,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 204 [2022-11-20 11:39:21,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 152 transitions, 334 flow. Second operand has 10 states, 10 states have (on average 160.3) internal successors, (1603), 10 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:21,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 204 [2022-11-20 11:39:21,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:21,968 INFO L130 PetriNetUnfolder]: 0/193 cut-off events. [2022-11-20 11:39:21,968 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:39:21,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 193 events. 0/193 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 346 event pairs, 0 based on Foata normal form. 2/195 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-20 11:39:21,969 INFO L137 encePairwiseOnDemand]: 198/204 looper letters, 14 selfloop transitions, 9 changer transitions 0/162 dead transitions. [2022-11-20 11:39:21,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 162 transitions, 402 flow [2022-11-20 11:39:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:39:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:39:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1447 transitions. [2022-11-20 11:39:21,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7881263616557734 [2022-11-20 11:39:21,974 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1447 transitions. [2022-11-20 11:39:21,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1447 transitions. [2022-11-20 11:39:21,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:21,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1447 transitions. [2022-11-20 11:39:21,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.77777777777777) internal successors, (1447), 9 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,984 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,984 INFO L175 Difference]: Start difference. First operand has 164 places, 152 transitions, 334 flow. Second operand 9 states and 1447 transitions. [2022-11-20 11:39:21,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 162 transitions, 402 flow [2022-11-20 11:39:21,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 162 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:21,990 INFO L231 Difference]: Finished difference. Result has 174 places, 158 transitions, 382 flow [2022-11-20 11:39:21,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=382, PETRI_PLACES=174, PETRI_TRANSITIONS=158} [2022-11-20 11:39:21,991 INFO L288 CegarLoopForPetriNet]: 180 programPoint places, -6 predicate places. [2022-11-20 11:39:21,991 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 158 transitions, 382 flow [2022-11-20 11:39:21,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.3) internal successors, (1603), 10 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:21,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:21,993 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:22,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:22,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:22,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2111688101, now seen corresponding path program 1 times [2022-11-20 11:39:22,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:22,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525170388] [2022-11-20 11:39:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 11:39:22,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:22,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525170388] [2022-11-20 11:39:22,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525170388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:22,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:22,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:39:22,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637946195] [2022-11-20 11:39:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:22,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:39:22,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:22,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:39:22,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:39:22,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 204 [2022-11-20 11:39:22,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 158 transitions, 382 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:22,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:22,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 204 [2022-11-20 11:39:22,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:29,983 INFO L130 PetriNetUnfolder]: 16742/41405 cut-off events. [2022-11-20 11:39:29,984 INFO L131 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2022-11-20 11:39:30,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64822 conditions, 41405 events. 16742/41405 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 493900 event pairs, 10951 based on Foata normal form. 750/41594 useless extension candidates. Maximal degree in co-relation 64811. Up to 14189 conditions per place. [2022-11-20 11:39:30,294 INFO L137 encePairwiseOnDemand]: 196/204 looper letters, 31 selfloop transitions, 5 changer transitions 53/222 dead transitions. [2022-11-20 11:39:30,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 222 transitions, 703 flow [2022-11-20 11:39:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:39:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:39:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1099 transitions. [2022-11-20 11:39:30,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7696078431372549 [2022-11-20 11:39:30,298 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1099 transitions. [2022-11-20 11:39:30,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1099 transitions. [2022-11-20 11:39:30,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:30,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1099 transitions. [2022-11-20 11:39:30,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,307 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,307 INFO L175 Difference]: Start difference. First operand has 174 places, 158 transitions, 382 flow. Second operand 7 states and 1099 transitions. [2022-11-20 11:39:30,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 222 transitions, 703 flow [2022-11-20 11:39:30,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 222 transitions, 697 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:30,316 INFO L231 Difference]: Finished difference. Result has 184 places, 162 transitions, 433 flow [2022-11-20 11:39:30,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=184, PETRI_TRANSITIONS=162} [2022-11-20 11:39:30,317 INFO L288 CegarLoopForPetriNet]: 180 programPoint places, 4 predicate places. [2022-11-20 11:39:30,317 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 162 transitions, 433 flow [2022-11-20 11:39:30,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:30,318 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:30,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:39:30,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash 205522023, now seen corresponding path program 1 times [2022-11-20 11:39:30,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:30,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618741164] [2022-11-20 11:39:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:39:30,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:39:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:39:30,396 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:39:30,397 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:39:30,397 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 11:39:30,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 11:39:30,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:39:30,398 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 11:39:30,399 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:39:30,399 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 11:39:30,448 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-20 11:39:30,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 528 flow [2022-11-20 11:39:30,760 INFO L130 PetriNetUnfolder]: 140/889 cut-off events. [2022-11-20 11:39:30,760 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 11:39:30,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 889 events. 140/889 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3890 event pairs, 23 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 602. Up to 80 conditions per place. [2022-11-20 11:39:30,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 528 flow [2022-11-20 11:39:30,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 528 flow [2022-11-20 11:39:30,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:39:30,777 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;@1207dc59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:39:30,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 11:39:30,782 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2022-11-20 11:39:30,783 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:39:30,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:30,783 INFO L209 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] [2022-11-20 11:39:30,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1416502005, now seen corresponding path program 1 times [2022-11-20 11:39:30,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:30,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298867609] [2022-11-20 11:39:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:30,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298867609] [2022-11-20 11:39:30,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298867609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:30,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:30,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:39:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386788610] [2022-11-20 11:39:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:30,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:39:30,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:30,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:39:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:39:30,818 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 234 [2022-11-20 11:39:30,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 528 flow. Second operand has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:30,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 234 [2022-11-20 11:39:30,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:30,978 INFO L130 PetriNetUnfolder]: 54/797 cut-off events. [2022-11-20 11:39:30,978 INFO L131 PetriNetUnfolder]: For 291/313 co-relation queries the response was YES. [2022-11-20 11:39:30,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 797 events. 54/797 cut-off events. For 291/313 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3699 event pairs, 23 based on Foata normal form. 580/1333 useless extension candidates. Maximal degree in co-relation 573. Up to 86 conditions per place. [2022-11-20 11:39:30,984 INFO L137 encePairwiseOnDemand]: 199/234 looper letters, 5 selfloop transitions, 0 changer transitions 24/198 dead transitions. [2022-11-20 11:39:30,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 198 transitions, 476 flow [2022-11-20 11:39:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:39:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:39:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 421 transitions. [2022-11-20 11:39:30,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8995726495726496 [2022-11-20 11:39:30,988 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 421 transitions. [2022-11-20 11:39:30,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 421 transitions. [2022-11-20 11:39:30,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:30,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 421 transitions. [2022-11-20 11:39:30,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 210.5) internal successors, (421), 2 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,991 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,991 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 528 flow. Second operand 2 states and 421 transitions. [2022-11-20 11:39:30,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 198 transitions, 476 flow [2022-11-20 11:39:30,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 198 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:30,996 INFO L231 Difference]: Finished difference. Result has 205 places, 174 transitions, 393 flow [2022-11-20 11:39:30,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=393, PETRI_PLACES=205, PETRI_TRANSITIONS=174} [2022-11-20 11:39:30,998 INFO L288 CegarLoopForPetriNet]: 205 programPoint places, 0 predicate places. [2022-11-20 11:39:30,998 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 174 transitions, 393 flow [2022-11-20 11:39:30,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:30,999 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:30,999 INFO L209 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] [2022-11-20 11:39:30,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:39:30,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1081513932, now seen corresponding path program 1 times [2022-11-20 11:39:31,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:31,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397953380] [2022-11-20 11:39:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:31,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:31,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397953380] [2022-11-20 11:39:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397953380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:31,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:31,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:39:31,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214033448] [2022-11-20 11:39:31,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:31,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:39:31,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:39:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:39:31,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 234 [2022-11-20 11:39:31,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 174 transitions, 393 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:31,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 234 [2022-11-20 11:39:31,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:31,104 INFO L130 PetriNetUnfolder]: 0/258 cut-off events. [2022-11-20 11:39:31,104 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 11:39:31,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 258 events. 0/258 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 616 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-20 11:39:31,105 INFO L137 encePairwiseOnDemand]: 231/234 looper letters, 14 selfloop transitions, 2 changer transitions 0/178 dead transitions. [2022-11-20 11:39:31,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 178 transitions, 433 flow [2022-11-20 11:39:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:39:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:39:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2022-11-20 11:39:31,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7977207977207977 [2022-11-20 11:39:31,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2022-11-20 11:39:31,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2022-11-20 11:39:31,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:31,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2022-11-20 11:39:31,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,112 INFO L175 Difference]: Start difference. First operand has 205 places, 174 transitions, 393 flow. Second operand 3 states and 560 transitions. [2022-11-20 11:39:31,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 178 transitions, 433 flow [2022-11-20 11:39:31,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 178 transitions, 413 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-20 11:39:31,116 INFO L231 Difference]: Finished difference. Result has 189 places, 175 transitions, 385 flow [2022-11-20 11:39:31,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=189, PETRI_TRANSITIONS=175} [2022-11-20 11:39:31,116 INFO L288 CegarLoopForPetriNet]: 205 programPoint places, -16 predicate places. [2022-11-20 11:39:31,117 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 175 transitions, 385 flow [2022-11-20 11:39:31,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:31,117 INFO L209 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] [2022-11-20 11:39:31,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:39:31,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1216079448, now seen corresponding path program 1 times [2022-11-20 11:39:31,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:31,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406617979] [2022-11-20 11:39:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:31,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:31,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:31,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406617979] [2022-11-20 11:39:31,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406617979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:31,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237860526] [2022-11-20 11:39:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:31,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:31,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:31,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:39:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:39:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:31,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:39:31,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237860526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:39:31,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:39:31,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:39:31,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100636039] [2022-11-20 11:39:31,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:31,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:39:31,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:31,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:39:31,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:39:31,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 234 [2022-11-20 11:39:31,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 175 transitions, 385 flow. Second operand has 10 states, 10 states have (on average 182.3) internal successors, (1823), 10 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:31,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 234 [2022-11-20 11:39:31,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:39:31,498 INFO L130 PetriNetUnfolder]: 0/236 cut-off events. [2022-11-20 11:39:31,498 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 11:39:31,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 236 events. 0/236 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 489 event pairs, 0 based on Foata normal form. 2/238 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 11:39:31,500 INFO L137 encePairwiseOnDemand]: 228/234 looper letters, 15 selfloop transitions, 9 changer transitions 0/185 dead transitions. [2022-11-20 11:39:31,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 185 transitions, 455 flow [2022-11-20 11:39:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:39:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:39:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1646 transitions. [2022-11-20 11:39:31,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7815764482431149 [2022-11-20 11:39:31,504 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1646 transitions. [2022-11-20 11:39:31,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1646 transitions. [2022-11-20 11:39:31,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:39:31,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1646 transitions. [2022-11-20 11:39:31,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.88888888888889) internal successors, (1646), 9 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,514 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 234.0) internal successors, (2340), 10 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,515 INFO L175 Difference]: Start difference. First operand has 189 places, 175 transitions, 385 flow. Second operand 9 states and 1646 transitions. [2022-11-20 11:39:31,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 185 transitions, 455 flow [2022-11-20 11:39:31,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 185 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:39:31,519 INFO L231 Difference]: Finished difference. Result has 199 places, 181 transitions, 433 flow [2022-11-20 11:39:31,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=433, PETRI_PLACES=199, PETRI_TRANSITIONS=181} [2022-11-20 11:39:31,520 INFO L288 CegarLoopForPetriNet]: 205 programPoint places, -6 predicate places. [2022-11-20 11:39:31,520 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 181 transitions, 433 flow [2022-11-20 11:39:31,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 182.3) internal successors, (1823), 10 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:39:31,522 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:39:31,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:31,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5be8c1e-69f2-4367-80a4-3649ff73be83/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:31,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:39:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:31,727 INFO L85 PathProgramCache]: Analyzing trace with hash -448216797, now seen corresponding path program 1 times [2022-11-20 11:39:31,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:39:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173537711] [2022-11-20 11:39:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:39:31,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:39:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:39:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 11:39:31,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:39:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173537711] [2022-11-20 11:39:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173537711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:39:31,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:39:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:39:31,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433028419] [2022-11-20 11:39:31,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:39:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:39:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:39:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:39:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:39:31,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 234 [2022-11-20 11:39:31,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 181 transitions, 433 flow. Second operand has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:39:31,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:39:31,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 234 [2022-11-20 11:39:31,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand