./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8 --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 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:20:48,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:20:48,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:20:48,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:20:48,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:20:48,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:20:48,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:20:48,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:20:48,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:20:48,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:20:48,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:20:48,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:20:48,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:20:48,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:20:48,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:20:48,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:20:48,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:20:48,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:20:48,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:20:48,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:20:48,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:20:48,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:20:48,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:20:48,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:20:48,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:20:48,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:20:48,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:20:48,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:20:48,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:20:48,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:20:48,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:20:48,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:20:48,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:20:48,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:20:48,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:20:48,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:20:48,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:20:48,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:20:48,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:20:48,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:20:48,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:20:48,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:20:48,656 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:20:48,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:20:48,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:20:48,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:20:48,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:20:48,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:20:48,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:20:48,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:20:48,664 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:20:48,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:20:48,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:20:48,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:20:48,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:20:48,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:20:48,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:20:48,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:20:48,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:20:48,665 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:20:48,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:20:48,665 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:20:48,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:20:48,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:20:48,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:20:48,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:20:48,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:20:48,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:20:48,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:20:48,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:20:48,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:20:48,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:20:48,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:20:48,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:20:48,668 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:20:48,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:20:48,668 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:20:48,668 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 [2022-12-13 19:20:48,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:20:48,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:20:48,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:20:48,883 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:20:48,883 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:20:48,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2022-12-13 19:20:51,368 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:20:51,522 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:20:51,523 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2022-12-13 19:20:51,527 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/data/6243e0e1b/ce3445731b724baaa1817f57e510fed6/FLAGd33fb412b [2022-12-13 19:20:51,537 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/data/6243e0e1b/ce3445731b724baaa1817f57e510fed6 [2022-12-13 19:20:51,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:20:51,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:20:51,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:20:51,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:20:51,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:20:51,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dba1538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51, skipping insertion in model container [2022-12-13 19:20:51,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:20:51,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:20:51,689 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_043b49b5-2b13-4999-bc05-9e7c90e32503/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2022-12-13 19:20:51,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:20:51,703 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:20:51,728 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_043b49b5-2b13-4999-bc05-9e7c90e32503/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2022-12-13 19:20:51,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:20:51,743 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:20:51,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51 WrapperNode [2022-12-13 19:20:51,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:20:51,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:20:51,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:20:51,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:20:51,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,777 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-12-13 19:20:51,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:20:51,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:20:51,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:20:51,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:20:51,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:20:51,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:20:51,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:20:51,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:20:51,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (1/1) ... [2022-12-13 19:20:51,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:20:51,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:20:51,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:20:51,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:20:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:20:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:20:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:20:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:20:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:20:51,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:20:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:20:51,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:20:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 19:20:51,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 19:20:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 19:20:51,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 19:20:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:20:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-12-13 19:20:51,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-12-13 19:20:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-12-13 19:20:51,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-12-13 19:20:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:20:51,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:20:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:20:51,875 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:20:51,958 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:20:51,960 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:20:52,187 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:20:52,197 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:20:52,197 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 19:20:52,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:20:52 BoogieIcfgContainer [2022-12-13 19:20:52,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:20:52,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:20:52,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:20:52,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:20:52,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:20:51" (1/3) ... [2022-12-13 19:20:52,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553b43f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:20:52, skipping insertion in model container [2022-12-13 19:20:52,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:20:51" (2/3) ... [2022-12-13 19:20:52,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553b43f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:20:52, skipping insertion in model container [2022-12-13 19:20:52,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:20:52" (3/3) ... [2022-12-13 19:20:52,207 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2022-12-13 19:20:52,216 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 19:20:52,223 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:20:52,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:20:52,224 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:20:52,321 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-12-13 19:20:52,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2022-12-13 19:20:52,437 INFO L130 PetriNetUnfolder]: 14/163 cut-off events. [2022-12-13 19:20:52,437 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:20:52,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2022-12-13 19:20:52,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2022-12-13 19:20:52,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2022-12-13 19:20:52,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:20:52,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 146 transitions, 328 flow [2022-12-13 19:20:52,466 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 146 transitions, 328 flow [2022-12-13 19:20:52,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 146 transitions, 328 flow [2022-12-13 19:20:52,508 INFO L130 PetriNetUnfolder]: 14/146 cut-off events. [2022-12-13 19:20:52,509 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:20:52,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 146 events. 14/146 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2022-12-13 19:20:52,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 2916 [2022-12-13 19:20:57,922 INFO L134 LiptonReduction]: Checked pairs total: 3541 [2022-12-13 19:20:57,923 INFO L136 LiptonReduction]: Total number of compositions: 126 [2022-12-13 19:20:57,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:20:57,937 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;@2c58ef66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:20:57,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 19:20:57,942 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2022-12-13 19:20:57,943 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:20:57,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:57,943 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] [2022-12-13 19:20:57,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:20:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash 257492083, now seen corresponding path program 1 times [2022-12-13 19:20:57,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:20:57,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396549363] [2022-12-13 19:20:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:20:57,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:20:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:20:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:58,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:20:58,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396549363] [2022-12-13 19:20:58,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396549363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:20:58,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:20:58,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:20:58,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436710467] [2022-12-13 19:20:58,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:20:58,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:20:58,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:20:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:20:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:20:58,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 295 [2022-12-13 19:20:58,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:58,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:20:58,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 295 [2022-12-13 19:20:58,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:20:59,109 INFO L130 PetriNetUnfolder]: 3277/3973 cut-off events. [2022-12-13 19:20:59,109 INFO L131 PetriNetUnfolder]: For 287/287 co-relation queries the response was YES. [2022-12-13 19:20:59,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8270 conditions, 3973 events. 3277/3973 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10718 event pairs, 837 based on Foata normal form. 1/2272 useless extension candidates. Maximal degree in co-relation 5564. Up to 2141 conditions per place. [2022-12-13 19:20:59,132 INFO L137 encePairwiseOnDemand]: 291/295 looper letters, 59 selfloop transitions, 3 changer transitions 1/63 dead transitions. [2022-12-13 19:20:59,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 309 flow [2022-12-13 19:20:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:20:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:20:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-12-13 19:20:59,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5536723163841808 [2022-12-13 19:20:59,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-12-13 19:20:59,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-12-13 19:20:59,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:20:59,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-12-13 19:20:59,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:59,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:59,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:59,166 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 110 flow. Second operand 3 states and 490 transitions. [2022-12-13 19:20:59,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 309 flow [2022-12-13 19:20:59,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 271 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 19:20:59,177 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 105 flow [2022-12-13 19:20:59,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2022-12-13 19:20:59,182 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2022-12-13 19:20:59,183 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 105 flow [2022-12-13 19:20:59,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:59,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:59,183 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] [2022-12-13 19:20:59,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:20:59,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:20:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:59,185 INFO L85 PathProgramCache]: Analyzing trace with hash 904755994, now seen corresponding path program 1 times [2022-12-13 19:20:59,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:20:59,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320892289] [2022-12-13 19:20:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:20:59,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:20:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:20:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:59,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:20:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320892289] [2022-12-13 19:20:59,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320892289] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:20:59,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:20:59,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:20:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819858446] [2022-12-13 19:20:59,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:20:59,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:20:59,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:20:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:20:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:20:59,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2022-12-13 19:20:59,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:20:59,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:20:59,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2022-12-13 19:20:59,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:00,178 INFO L130 PetriNetUnfolder]: 4887/5960 cut-off events. [2022-12-13 19:21:00,178 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-12-13 19:21:00,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13241 conditions, 5960 events. 4887/5960 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17807 event pairs, 529 based on Foata normal form. 126/4330 useless extension candidates. Maximal degree in co-relation 7451. Up to 4746 conditions per place. [2022-12-13 19:21:00,196 INFO L137 encePairwiseOnDemand]: 286/295 looper letters, 74 selfloop transitions, 13 changer transitions 7/94 dead transitions. [2022-12-13 19:21:00,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 94 transitions, 425 flow [2022-12-13 19:21:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2022-12-13 19:21:00,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 19:21:00,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2022-12-13 19:21:00,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2022-12-13 19:21:00,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:00,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2022-12-13 19:21:00,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:00,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:00,203 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:00,203 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 105 flow. Second operand 4 states and 590 transitions. [2022-12-13 19:21:00,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 94 transitions, 425 flow [2022-12-13 19:21:00,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 94 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:00,205 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 191 flow [2022-12-13 19:21:00,206 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2022-12-13 19:21:00,206 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2022-12-13 19:21:00,206 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 191 flow [2022-12-13 19:21:00,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:00,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:00,207 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] [2022-12-13 19:21:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:21:00,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:00,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1686567034, now seen corresponding path program 2 times [2022-12-13 19:21:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:00,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732301446] [2022-12-13 19:21:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:00,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:00,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732301446] [2022-12-13 19:21:00,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732301446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:00,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174253088] [2022-12-13 19:21:00,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:21:00,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:00,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:00,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:00,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:21:00,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:21:00,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:00,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:21:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:00,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:00,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174253088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:00,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:00,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 19:21:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725957700] [2022-12-13 19:21:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:21:00,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2022-12-13 19:21:00,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:00,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:00,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2022-12-13 19:21:00,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:01,292 INFO L130 PetriNetUnfolder]: 6427/7817 cut-off events. [2022-12-13 19:21:01,292 INFO L131 PetriNetUnfolder]: For 5233/5233 co-relation queries the response was YES. [2022-12-13 19:21:01,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21888 conditions, 7817 events. 6427/7817 cut-off events. For 5233/5233 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23392 event pairs, 2167 based on Foata normal form. 1/7818 useless extension candidates. Maximal degree in co-relation 12123. Up to 5110 conditions per place. [2022-12-13 19:21:01,349 INFO L137 encePairwiseOnDemand]: 289/295 looper letters, 67 selfloop transitions, 13 changer transitions 5/85 dead transitions. [2022-12-13 19:21:01,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 85 transitions, 456 flow [2022-12-13 19:21:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2022-12-13 19:21:01,351 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5423728813559322 [2022-12-13 19:21:01,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2022-12-13 19:21:01,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2022-12-13 19:21:01,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:01,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2022-12-13 19:21:01,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-12-13 19:21:01,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:01,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:01,354 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 191 flow. Second operand 3 states and 480 transitions. [2022-12-13 19:21:01,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 85 transitions, 456 flow [2022-12-13 19:21:01,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 85 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:21:01,357 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 256 flow [2022-12-13 19:21:01,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2022-12-13 19:21:01,358 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2022-12-13 19:21:01,358 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 256 flow [2022-12-13 19:21:01,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:01,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:01,359 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] [2022-12-13 19:21:01,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:01,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:01,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:01,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1091951550, now seen corresponding path program 1 times [2022-12-13 19:21:01,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:01,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532952791] [2022-12-13 19:21:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:01,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:01,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:01,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532952791] [2022-12-13 19:21:01,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532952791] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:01,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:01,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:01,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141974501] [2022-12-13 19:21:01,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:01,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:01,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:21:01,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2022-12-13 19:21:01,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:01,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:01,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2022-12-13 19:21:01,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:02,676 INFO L130 PetriNetUnfolder]: 9465/11538 cut-off events. [2022-12-13 19:21:02,676 INFO L131 PetriNetUnfolder]: For 15285/15285 co-relation queries the response was YES. [2022-12-13 19:21:02,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36178 conditions, 11538 events. 9465/11538 cut-off events. For 15285/15285 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 39053 event pairs, 987 based on Foata normal form. 218/11756 useless extension candidates. Maximal degree in co-relation 18794. Up to 5897 conditions per place. [2022-12-13 19:21:02,708 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 136 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2022-12-13 19:21:02,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 152 transitions, 948 flow [2022-12-13 19:21:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:21:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:21:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2022-12-13 19:21:02,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5396610169491526 [2022-12-13 19:21:02,710 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2022-12-13 19:21:02,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2022-12-13 19:21:02,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:02,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2022-12-13 19:21:02,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:02,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:02,714 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:02,714 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 256 flow. Second operand 5 states and 796 transitions. [2022-12-13 19:21:02,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 152 transitions, 948 flow [2022-12-13 19:21:02,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 152 transitions, 898 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:02,727 INFO L231 Difference]: Finished difference. Result has 53 places, 64 transitions, 334 flow [2022-12-13 19:21:02,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=53, PETRI_TRANSITIONS=64} [2022-12-13 19:21:02,727 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2022-12-13 19:21:02,727 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 64 transitions, 334 flow [2022-12-13 19:21:02,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:02,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:02,728 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] [2022-12-13 19:21:02,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:21:02,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:02,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:02,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1945338705, now seen corresponding path program 1 times [2022-12-13 19:21:02,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:02,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805004680] [2022-12-13 19:21:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:02,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:02,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805004680] [2022-12-13 19:21:02,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805004680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:02,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619347929] [2022-12-13 19:21:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:02,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:02,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:02,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:21:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:02,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:21:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:03,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:03,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619347929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:03,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:03,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 19:21:03,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442469825] [2022-12-13 19:21:03,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:03,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:03,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:03,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:21:03,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 295 [2022-12-13 19:21:03,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:03,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:03,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 295 [2022-12-13 19:21:03,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:03,736 INFO L130 PetriNetUnfolder]: 9465/11537 cut-off events. [2022-12-13 19:21:03,736 INFO L131 PetriNetUnfolder]: For 16707/16707 co-relation queries the response was YES. [2022-12-13 19:21:03,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37517 conditions, 11537 events. 9465/11537 cut-off events. For 16707/16707 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 36916 event pairs, 3991 based on Foata normal form. 1/11538 useless extension candidates. Maximal degree in co-relation 19653. Up to 6782 conditions per place. [2022-12-13 19:21:03,762 INFO L137 encePairwiseOnDemand]: 291/295 looper letters, 72 selfloop transitions, 13 changer transitions 12/97 dead transitions. [2022-12-13 19:21:03,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 97 transitions, 631 flow [2022-12-13 19:21:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2022-12-13 19:21:03,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5627118644067797 [2022-12-13 19:21:03,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2022-12-13 19:21:03,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2022-12-13 19:21:03,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:03,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2022-12-13 19:21:03,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:03,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:03,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:03,765 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 334 flow. Second operand 3 states and 498 transitions. [2022-12-13 19:21:03,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 97 transitions, 631 flow [2022-12-13 19:21:03,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 97 transitions, 631 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:21:03,779 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 365 flow [2022-12-13 19:21:03,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2022-12-13 19:21:03,779 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2022-12-13 19:21:03,779 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 365 flow [2022-12-13 19:21:03,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:03,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:03,780 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] [2022-12-13 19:21:03,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:03,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:03,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:03,981 INFO L85 PathProgramCache]: Analyzing trace with hash -143817266, now seen corresponding path program 2 times [2022-12-13 19:21:03,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:03,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579003982] [2022-12-13 19:21:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:03,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:04,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:04,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579003982] [2022-12-13 19:21:04,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579003982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:04,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835605208] [2022-12-13 19:21:04,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:21:04,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:04,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:04,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:04,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:21:04,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:21:04,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:21:04,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:04,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:04,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835605208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:04,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:04,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 19:21:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195441882] [2022-12-13 19:21:04,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:04,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:21:04,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:21:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:21:04,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 295 [2022-12-13 19:21:04,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 365 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:04,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:04,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 295 [2022-12-13 19:21:04,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:05,193 INFO L130 PetriNetUnfolder]: 11621/14157 cut-off events. [2022-12-13 19:21:05,193 INFO L131 PetriNetUnfolder]: For 22438/22438 co-relation queries the response was YES. [2022-12-13 19:21:05,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47194 conditions, 14157 events. 11621/14157 cut-off events. For 22438/22438 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 47974 event pairs, 3283 based on Foata normal form. 1/14158 useless extension candidates. Maximal degree in co-relation 25719. Up to 8264 conditions per place. [2022-12-13 19:21:05,239 INFO L137 encePairwiseOnDemand]: 291/295 looper letters, 81 selfloop transitions, 9 changer transitions 5/95 dead transitions. [2022-12-13 19:21:05,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 95 transitions, 674 flow [2022-12-13 19:21:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:21:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:21:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2022-12-13 19:21:05,241 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5581920903954802 [2022-12-13 19:21:05,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2022-12-13 19:21:05,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2022-12-13 19:21:05,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:05,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2022-12-13 19:21:05,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:05,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:05,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:05,245 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 365 flow. Second operand 3 states and 494 transitions. [2022-12-13 19:21:05,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 95 transitions, 674 flow [2022-12-13 19:21:05,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 95 transitions, 648 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:05,268 INFO L231 Difference]: Finished difference. Result has 57 places, 64 transitions, 380 flow [2022-12-13 19:21:05,268 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=57, PETRI_TRANSITIONS=64} [2022-12-13 19:21:05,269 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2022-12-13 19:21:05,269 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 64 transitions, 380 flow [2022-12-13 19:21:05,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:05,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:05,270 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] [2022-12-13 19:21:05,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:21:05,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:05,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:05,471 INFO L85 PathProgramCache]: Analyzing trace with hash -256812593, now seen corresponding path program 1 times [2022-12-13 19:21:05,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:05,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142438485] [2022-12-13 19:21:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:05,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:05,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142438485] [2022-12-13 19:21:05,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142438485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165593009] [2022-12-13 19:21:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:05,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:05,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:05,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:05,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:21:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:05,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:05,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:05,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:05,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165593009] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:05,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:05,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 19:21:05,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324559582] [2022-12-13 19:21:05,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:05,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:21:05,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:05,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:21:05,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:21:05,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2022-12-13 19:21:05,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 64 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:05,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:05,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2022-12-13 19:21:05,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:07,216 INFO L130 PetriNetUnfolder]: 14493/17593 cut-off events. [2022-12-13 19:21:07,216 INFO L131 PetriNetUnfolder]: For 31375/31375 co-relation queries the response was YES. [2022-12-13 19:21:07,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62136 conditions, 17593 events. 14493/17593 cut-off events. For 31375/31375 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 61870 event pairs, 2657 based on Foata normal form. 564/18157 useless extension candidates. Maximal degree in co-relation 30707. Up to 9030 conditions per place. [2022-12-13 19:21:07,262 INFO L137 encePairwiseOnDemand]: 286/295 looper letters, 127 selfloop transitions, 22 changer transitions 22/171 dead transitions. [2022-12-13 19:21:07,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 171 transitions, 1102 flow [2022-12-13 19:21:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 889 transitions. [2022-12-13 19:21:07,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5022598870056497 [2022-12-13 19:21:07,265 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 889 transitions. [2022-12-13 19:21:07,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 889 transitions. [2022-12-13 19:21:07,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:07,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 889 transitions. [2022-12-13 19:21:07,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.16666666666666) internal successors, (889), 6 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:07,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:07,268 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:07,268 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 380 flow. Second operand 6 states and 889 transitions. [2022-12-13 19:21:07,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 171 transitions, 1102 flow [2022-12-13 19:21:07,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 171 transitions, 1089 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:07,292 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 451 flow [2022-12-13 19:21:07,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=451, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2022-12-13 19:21:07,293 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2022-12-13 19:21:07,293 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 451 flow [2022-12-13 19:21:07,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:07,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:07,293 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] [2022-12-13 19:21:07,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:21:07,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:07,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash 646008460, now seen corresponding path program 1 times [2022-12-13 19:21:07,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:07,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578034481] [2022-12-13 19:21:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:07,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:07,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:07,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578034481] [2022-12-13 19:21:07,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578034481] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:07,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:07,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:07,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885596074] [2022-12-13 19:21:07,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:07,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:07,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:21:07,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2022-12-13 19:21:07,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 451 flow. Second operand has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:07,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:07,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2022-12-13 19:21:07,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:09,026 INFO L130 PetriNetUnfolder]: 14399/17499 cut-off events. [2022-12-13 19:21:09,026 INFO L131 PetriNetUnfolder]: For 44818/44818 co-relation queries the response was YES. [2022-12-13 19:21:09,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65441 conditions, 17499 events. 14399/17499 cut-off events. For 44818/44818 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61741 event pairs, 2710 based on Foata normal form. 94/17593 useless extension candidates. Maximal degree in co-relation 38392. Up to 16553 conditions per place. [2022-12-13 19:21:09,095 INFO L137 encePairwiseOnDemand]: 287/295 looper letters, 84 selfloop transitions, 18 changer transitions 14/116 dead transitions. [2022-12-13 19:21:09,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 851 flow [2022-12-13 19:21:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 587 transitions. [2022-12-13 19:21:09,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49745762711864405 [2022-12-13 19:21:09,098 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 587 transitions. [2022-12-13 19:21:09,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 587 transitions. [2022-12-13 19:21:09,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:09,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 587 transitions. [2022-12-13 19:21:09,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:09,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:09,101 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:09,101 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 451 flow. Second operand 4 states and 587 transitions. [2022-12-13 19:21:09,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 851 flow [2022-12-13 19:21:09,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 116 transitions, 830 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:09,150 INFO L231 Difference]: Finished difference. Result has 66 places, 72 transitions, 522 flow [2022-12-13 19:21:09,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=522, PETRI_PLACES=66, PETRI_TRANSITIONS=72} [2022-12-13 19:21:09,150 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2022-12-13 19:21:09,151 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 72 transitions, 522 flow [2022-12-13 19:21:09,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:09,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:09,151 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] [2022-12-13 19:21:09,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:21:09,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1485321196, now seen corresponding path program 2 times [2022-12-13 19:21:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:09,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272155890] [2022-12-13 19:21:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:09,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:09,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272155890] [2022-12-13 19:21:09,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272155890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:09,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:09,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:09,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596830525] [2022-12-13 19:21:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:09,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:21:09,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2022-12-13 19:21:09,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 72 transitions, 522 flow. Second operand has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:09,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:09,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2022-12-13 19:21:09,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:10,504 INFO L130 PetriNetUnfolder]: 14259/17359 cut-off events. [2022-12-13 19:21:10,504 INFO L131 PetriNetUnfolder]: For 45107/45107 co-relation queries the response was YES. [2022-12-13 19:21:10,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64631 conditions, 17359 events. 14259/17359 cut-off events. For 45107/45107 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61618 event pairs, 4022 based on Foata normal form. 140/17499 useless extension candidates. Maximal degree in co-relation 42292. Up to 16413 conditions per place. [2022-12-13 19:21:10,559 INFO L137 encePairwiseOnDemand]: 286/295 looper letters, 80 selfloop transitions, 27 changer transitions 19/126 dead transitions. [2022-12-13 19:21:10,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 126 transitions, 1021 flow [2022-12-13 19:21:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2022-12-13 19:21:10,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 19:21:10,561 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2022-12-13 19:21:10,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2022-12-13 19:21:10,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:10,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2022-12-13 19:21:10,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:10,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:10,564 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:10,564 INFO L175 Difference]: Start difference. First operand has 66 places, 72 transitions, 522 flow. Second operand 4 states and 590 transitions. [2022-12-13 19:21:10,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 126 transitions, 1021 flow [2022-12-13 19:21:10,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 126 transitions, 996 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:10,594 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 682 flow [2022-12-13 19:21:10,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=682, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2022-12-13 19:21:10,595 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2022-12-13 19:21:10,595 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 682 flow [2022-12-13 19:21:10,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:10,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:10,595 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] [2022-12-13 19:21:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 19:21:10,596 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1990984092, now seen corresponding path program 3 times [2022-12-13 19:21:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890314913] [2022-12-13 19:21:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:10,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:10,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890314913] [2022-12-13 19:21:10,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890314913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:10,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103267750] [2022-12-13 19:21:10,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:21:10,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:10,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:10,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:21:10,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:21:10,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:10,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:11,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103267750] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:11,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:11,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 19:21:11,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621353566] [2022-12-13 19:21:11,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:11,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:21:11,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:21:11,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:21:11,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2022-12-13 19:21:11,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 682 flow. Second operand has 6 states, 6 states have (on average 135.66666666666666) internal successors, (814), 6 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:11,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:11,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2022-12-13 19:21:11,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:12,566 INFO L130 PetriNetUnfolder]: 18783/22912 cut-off events. [2022-12-13 19:21:12,566 INFO L131 PetriNetUnfolder]: For 59440/59440 co-relation queries the response was YES. [2022-12-13 19:21:12,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88027 conditions, 22912 events. 18783/22912 cut-off events. For 59440/59440 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 84945 event pairs, 2979 based on Foata normal form. 569/23481 useless extension candidates. Maximal degree in co-relation 46881. Up to 7710 conditions per place. [2022-12-13 19:21:12,644 INFO L137 encePairwiseOnDemand]: 285/295 looper letters, 165 selfloop transitions, 30 changer transitions 18/213 dead transitions. [2022-12-13 19:21:12,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 213 transitions, 1796 flow [2022-12-13 19:21:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 887 transitions. [2022-12-13 19:21:12,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5011299435028248 [2022-12-13 19:21:12,647 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 887 transitions. [2022-12-13 19:21:12,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 887 transitions. [2022-12-13 19:21:12,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:12,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 887 transitions. [2022-12-13 19:21:12,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:12,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:12,651 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:12,651 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 682 flow. Second operand 6 states and 887 transitions. [2022-12-13 19:21:12,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 213 transitions, 1796 flow [2022-12-13 19:21:12,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 213 transitions, 1771 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:12,686 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 742 flow [2022-12-13 19:21:12,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=742, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2022-12-13 19:21:12,686 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2022-12-13 19:21:12,687 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 742 flow [2022-12-13 19:21:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.66666666666666) internal successors, (814), 6 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:12,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:12,687 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] [2022-12-13 19:21:12,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:21:12,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:21:12,889 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash -232287790, now seen corresponding path program 1 times [2022-12-13 19:21:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672698848] [2022-12-13 19:21:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:13,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672698848] [2022-12-13 19:21:13,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672698848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690275917] [2022-12-13 19:21:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:13,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:13,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:13,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:13,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:21:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:13,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:13,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:13,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690275917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:13,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:13,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-12-13 19:21:13,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136101862] [2022-12-13 19:21:13,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:13,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:21:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:21:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:21:13,420 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2022-12-13 19:21:13,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 742 flow. Second operand has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:13,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:13,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2022-12-13 19:21:13,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:15,793 INFO L130 PetriNetUnfolder]: 26533/32466 cut-off events. [2022-12-13 19:21:15,794 INFO L131 PetriNetUnfolder]: For 108732/108732 co-relation queries the response was YES. [2022-12-13 19:21:15,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135059 conditions, 32466 events. 26533/32466 cut-off events. For 108732/108732 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 129957 event pairs, 5075 based on Foata normal form. 997/33463 useless extension candidates. Maximal degree in co-relation 73597. Up to 13562 conditions per place. [2022-12-13 19:21:15,898 INFO L137 encePairwiseOnDemand]: 289/295 looper letters, 164 selfloop transitions, 16 changer transitions 12/192 dead transitions. [2022-12-13 19:21:15,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 192 transitions, 1729 flow [2022-12-13 19:21:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:21:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:21:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 797 transitions. [2022-12-13 19:21:15,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5403389830508475 [2022-12-13 19:21:15,900 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 797 transitions. [2022-12-13 19:21:15,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 797 transitions. [2022-12-13 19:21:15,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:15,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 797 transitions. [2022-12-13 19:21:15,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,903 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,903 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 742 flow. Second operand 5 states and 797 transitions. [2022-12-13 19:21:15,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 192 transitions, 1729 flow [2022-12-13 19:21:16,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 192 transitions, 1646 flow, removed 16 selfloop flow, removed 3 redundant places. [2022-12-13 19:21:16,033 INFO L231 Difference]: Finished difference. Result has 78 places, 86 transitions, 752 flow [2022-12-13 19:21:16,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=752, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2022-12-13 19:21:16,033 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2022-12-13 19:21:16,033 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 752 flow [2022-12-13 19:21:16,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:16,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:16,034 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] [2022-12-13 19:21:16,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:21:16,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:16,236 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:16,237 INFO L85 PathProgramCache]: Analyzing trace with hash 647543184, now seen corresponding path program 1 times [2022-12-13 19:21:16,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:16,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482087676] [2022-12-13 19:21:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:16,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:16,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482087676] [2022-12-13 19:21:16,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482087676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:16,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:16,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925243192] [2022-12-13 19:21:16,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:16,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:16,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:16,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:21:16,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 295 [2022-12-13 19:21:16,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 752 flow. Second operand has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:16,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:16,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 295 [2022-12-13 19:21:16,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:19,276 INFO L130 PetriNetUnfolder]: 30288/37007 cut-off events. [2022-12-13 19:21:19,276 INFO L131 PetriNetUnfolder]: For 135903/135903 co-relation queries the response was YES. [2022-12-13 19:21:19,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163038 conditions, 37007 events. 30288/37007 cut-off events. For 135903/135903 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 147741 event pairs, 9423 based on Foata normal form. 840/37847 useless extension candidates. Maximal degree in co-relation 82602. Up to 32488 conditions per place. [2022-12-13 19:21:19,403 INFO L137 encePairwiseOnDemand]: 287/295 looper letters, 110 selfloop transitions, 26 changer transitions 12/148 dead transitions. [2022-12-13 19:21:19,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 148 transitions, 1393 flow [2022-12-13 19:21:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2022-12-13 19:21:19,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016949152542373 [2022-12-13 19:21:19,406 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2022-12-13 19:21:19,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2022-12-13 19:21:19,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:19,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2022-12-13 19:21:19,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:19,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:19,408 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:19,408 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 752 flow. Second operand 4 states and 592 transitions. [2022-12-13 19:21:19,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 148 transitions, 1393 flow [2022-12-13 19:21:19,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 148 transitions, 1368 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 19:21:19,686 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 800 flow [2022-12-13 19:21:19,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=800, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2022-12-13 19:21:19,687 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2022-12-13 19:21:19,687 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 800 flow [2022-12-13 19:21:19,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:19,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:19,687 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] [2022-12-13 19:21:19,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 19:21:19,687 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1091974, now seen corresponding path program 2 times [2022-12-13 19:21:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:19,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989003430] [2022-12-13 19:21:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:19,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:19,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989003430] [2022-12-13 19:21:19,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989003430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:19,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:19,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:19,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122486609] [2022-12-13 19:21:19,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:19,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:19,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:21:19,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 295 [2022-12-13 19:21:19,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 800 flow. Second operand has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:19,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:19,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 295 [2022-12-13 19:21:19,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:22,804 INFO L130 PetriNetUnfolder]: 34916/42583 cut-off events. [2022-12-13 19:21:22,805 INFO L131 PetriNetUnfolder]: For 156620/156620 co-relation queries the response was YES. [2022-12-13 19:21:22,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191800 conditions, 42583 events. 34916/42583 cut-off events. For 156620/156620 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 172057 event pairs, 11091 based on Foata normal form. 948/43531 useless extension candidates. Maximal degree in co-relation 108104. Up to 37392 conditions per place. [2022-12-13 19:21:22,961 INFO L137 encePairwiseOnDemand]: 287/295 looper letters, 106 selfloop transitions, 26 changer transitions 12/144 dead transitions. [2022-12-13 19:21:22,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 144 transitions, 1369 flow [2022-12-13 19:21:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2022-12-13 19:21:22,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016949152542373 [2022-12-13 19:21:22,964 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2022-12-13 19:21:22,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2022-12-13 19:21:22,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:22,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2022-12-13 19:21:22,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:22,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:22,966 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:22,966 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 800 flow. Second operand 4 states and 592 transitions. [2022-12-13 19:21:22,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 144 transitions, 1369 flow [2022-12-13 19:21:23,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 144 transitions, 1320 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:23,421 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 818 flow [2022-12-13 19:21:23,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=818, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2022-12-13 19:21:23,422 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2022-12-13 19:21:23,422 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 818 flow [2022-12-13 19:21:23,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:23,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:23,422 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] [2022-12-13 19:21:23,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 19:21:23,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:23,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1132258354, now seen corresponding path program 3 times [2022-12-13 19:21:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:23,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881480425] [2022-12-13 19:21:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:23,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:23,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881480425] [2022-12-13 19:21:23,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881480425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:23,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:23,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:23,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597900785] [2022-12-13 19:21:23,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:23,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:21:23,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 295 [2022-12-13 19:21:23,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 818 flow. Second operand has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:23,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:23,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 295 [2022-12-13 19:21:23,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:27,507 INFO L130 PetriNetUnfolder]: 39060/47563 cut-off events. [2022-12-13 19:21:27,507 INFO L131 PetriNetUnfolder]: For 188363/188363 co-relation queries the response was YES. [2022-12-13 19:21:27,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219327 conditions, 47563 events. 39060/47563 cut-off events. For 188363/188363 co-relation queries the response was YES. Maximal size of possible extension queue 1252. Compared 194361 event pairs, 12541 based on Foata normal form. 836/48399 useless extension candidates. Maximal degree in co-relation 132448. Up to 42868 conditions per place. [2022-12-13 19:21:27,684 INFO L137 encePairwiseOnDemand]: 287/295 looper letters, 105 selfloop transitions, 26 changer transitions 12/143 dead transitions. [2022-12-13 19:21:27,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 1361 flow [2022-12-13 19:21:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2022-12-13 19:21:27,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016949152542373 [2022-12-13 19:21:27,686 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2022-12-13 19:21:27,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2022-12-13 19:21:27,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:27,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2022-12-13 19:21:27,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:27,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:27,688 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:27,688 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 818 flow. Second operand 4 states and 592 transitions. [2022-12-13 19:21:27,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 1361 flow [2022-12-13 19:21:28,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 143 transitions, 1312 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:28,191 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 838 flow [2022-12-13 19:21:28,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=838, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2022-12-13 19:21:28,192 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2022-12-13 19:21:28,192 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 838 flow [2022-12-13 19:21:28,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:28,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:28,192 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] [2022-12-13 19:21:28,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 19:21:28,192 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:28,193 INFO L85 PathProgramCache]: Analyzing trace with hash -164855652, now seen corresponding path program 1 times [2022-12-13 19:21:28,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:28,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178235880] [2022-12-13 19:21:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:28,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:28,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:28,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178235880] [2022-12-13 19:21:28,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178235880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:28,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845631785] [2022-12-13 19:21:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:28,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:28,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:28,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:28,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:21:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:28,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:21:28,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:28,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845631785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:28,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:28,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 19:21:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085581752] [2022-12-13 19:21:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:28,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:21:28,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 295 [2022-12-13 19:21:28,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 838 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:28,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:28,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 295 [2022-12-13 19:21:28,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:31,427 INFO L130 PetriNetUnfolder]: 33664/41025 cut-off events. [2022-12-13 19:21:31,427 INFO L131 PetriNetUnfolder]: For 170285/170285 co-relation queries the response was YES. [2022-12-13 19:21:31,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191854 conditions, 41025 events. 33664/41025 cut-off events. For 170285/170285 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 169566 event pairs, 2665 based on Foata normal form. 1076/42101 useless extension candidates. Maximal degree in co-relation 157754. Up to 18947 conditions per place. [2022-12-13 19:21:31,613 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 132 selfloop transitions, 14 changer transitions 55/201 dead transitions. [2022-12-13 19:21:31,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 201 transitions, 1913 flow [2022-12-13 19:21:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:21:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:21:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2022-12-13 19:21:31,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5396610169491526 [2022-12-13 19:21:31,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2022-12-13 19:21:31,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2022-12-13 19:21:31,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:31,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2022-12-13 19:21:31,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:31,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:31,620 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:31,620 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 838 flow. Second operand 5 states and 796 transitions. [2022-12-13 19:21:31,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 201 transitions, 1913 flow [2022-12-13 19:21:32,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 201 transitions, 1853 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:32,084 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 709 flow [2022-12-13 19:21:32,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=709, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2022-12-13 19:21:32,084 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2022-12-13 19:21:32,084 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 709 flow [2022-12-13 19:21:32,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:32,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:32,085 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] [2022-12-13 19:21:32,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:21:32,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:21:32,287 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1547512476, now seen corresponding path program 2 times [2022-12-13 19:21:32,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:32,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531233636] [2022-12-13 19:21:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:32,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:32,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:32,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531233636] [2022-12-13 19:21:32,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531233636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:32,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213600125] [2022-12-13 19:21:32,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:21:32,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:32,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:32,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:32,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:21:32,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:21:32,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:32,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:21:32,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:32,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213600125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:32,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:32,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 19:21:32,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145209009] [2022-12-13 19:21:32,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:32,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:32,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:21:32,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 295 [2022-12-13 19:21:32,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 709 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:32,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:32,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 295 [2022-12-13 19:21:32,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:34,838 INFO L130 PetriNetUnfolder]: 23004/27864 cut-off events. [2022-12-13 19:21:34,838 INFO L131 PetriNetUnfolder]: For 129070/129070 co-relation queries the response was YES. [2022-12-13 19:21:34,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134421 conditions, 27864 events. 23004/27864 cut-off events. For 129070/129070 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 104566 event pairs, 1604 based on Foata normal form. 644/28508 useless extension candidates. Maximal degree in co-relation 112792. Up to 12528 conditions per place. [2022-12-13 19:21:34,961 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 139 selfloop transitions, 8 changer transitions 48/195 dead transitions. [2022-12-13 19:21:34,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 195 transitions, 1891 flow [2022-12-13 19:21:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:21:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:21:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 792 transitions. [2022-12-13 19:21:34,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5369491525423729 [2022-12-13 19:21:34,963 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 792 transitions. [2022-12-13 19:21:34,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 792 transitions. [2022-12-13 19:21:34,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:34,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 792 transitions. [2022-12-13 19:21:34,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:34,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:34,966 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:34,966 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 709 flow. Second operand 5 states and 792 transitions. [2022-12-13 19:21:34,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 195 transitions, 1891 flow [2022-12-13 19:21:35,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 195 transitions, 1839 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:35,221 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 592 flow [2022-12-13 19:21:35,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=592, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2022-12-13 19:21:35,222 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2022-12-13 19:21:35,222 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 592 flow [2022-12-13 19:21:35,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:35,222 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:35,222 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] [2022-12-13 19:21:35,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:21:35,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:21:35,424 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:35,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1014361840, now seen corresponding path program 3 times [2022-12-13 19:21:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:35,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226097300] [2022-12-13 19:21:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:35,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:35,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:35,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226097300] [2022-12-13 19:21:35,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226097300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:35,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254856345] [2022-12-13 19:21:35,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:21:35,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:35,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:35,553 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:35,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:21:35,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:21:35,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:35,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:35,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:21:35,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:21:35,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254856345] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:35,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 19:21:35,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 19:21:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028891723] [2022-12-13 19:21:35,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:35,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:35,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:35,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:21:35,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 295 [2022-12-13 19:21:35,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 592 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:35,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:35,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 295 [2022-12-13 19:21:35,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:37,487 INFO L130 PetriNetUnfolder]: 21018/25334 cut-off events. [2022-12-13 19:21:37,487 INFO L131 PetriNetUnfolder]: For 114024/114024 co-relation queries the response was YES. [2022-12-13 19:21:37,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124316 conditions, 25334 events. 21018/25334 cut-off events. For 114024/114024 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 90119 event pairs, 2760 based on Foata normal form. 640/25974 useless extension candidates. Maximal degree in co-relation 104991. Up to 15896 conditions per place. [2022-12-13 19:21:37,614 INFO L137 encePairwiseOnDemand]: 291/295 looper letters, 136 selfloop transitions, 9 changer transitions 0/145 dead transitions. [2022-12-13 19:21:37,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 145 transitions, 1397 flow [2022-12-13 19:21:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:21:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:21:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 627 transitions. [2022-12-13 19:21:37,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5313559322033898 [2022-12-13 19:21:37,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 627 transitions. [2022-12-13 19:21:37,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 627 transitions. [2022-12-13 19:21:37,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:37,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 627 transitions. [2022-12-13 19:21:37,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,619 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,619 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 592 flow. Second operand 4 states and 627 transitions. [2022-12-13 19:21:37,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 145 transitions, 1397 flow [2022-12-13 19:21:37,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 145 transitions, 1373 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:37,820 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 601 flow [2022-12-13 19:21:37,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=601, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2022-12-13 19:21:37,821 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2022-12-13 19:21:37,821 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 601 flow [2022-12-13 19:21:37,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:37,822 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] [2022-12-13 19:21:37,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:38,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:21:38,024 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1214296357, now seen corresponding path program 1 times [2022-12-13 19:21:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:38,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60549599] [2022-12-13 19:21:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:38,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:21:38,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:38,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60549599] [2022-12-13 19:21:38,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60549599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:38,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93548943] [2022-12-13 19:21:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:38,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:38,230 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:38,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:21:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:38,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:21:38,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:21:38,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:21:38,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93548943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:38,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:38,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-12-13 19:21:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998843615] [2022-12-13 19:21:38,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:38,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:21:38,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:21:38,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:21:38,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2022-12-13 19:21:38,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 601 flow. Second operand has 6 states, 6 states have (on average 135.83333333333334) internal successors, (815), 6 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:38,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:38,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2022-12-13 19:21:38,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:40,955 INFO L130 PetriNetUnfolder]: 25366/30538 cut-off events. [2022-12-13 19:21:40,956 INFO L131 PetriNetUnfolder]: For 139370/139370 co-relation queries the response was YES. [2022-12-13 19:21:41,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154312 conditions, 30538 events. 25366/30538 cut-off events. For 139370/139370 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 114551 event pairs, 2252 based on Foata normal form. 856/31394 useless extension candidates. Maximal degree in co-relation 129777. Up to 20172 conditions per place. [2022-12-13 19:21:41,106 INFO L137 encePairwiseOnDemand]: 286/295 looper letters, 167 selfloop transitions, 20 changer transitions 3/190 dead transitions. [2022-12-13 19:21:41,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 190 transitions, 1703 flow [2022-12-13 19:21:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 865 transitions. [2022-12-13 19:21:41,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4887005649717514 [2022-12-13 19:21:41,109 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 865 transitions. [2022-12-13 19:21:41,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 865 transitions. [2022-12-13 19:21:41,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:41,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 865 transitions. [2022-12-13 19:21:41,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.16666666666666) internal successors, (865), 6 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,112 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,112 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 601 flow. Second operand 6 states and 865 transitions. [2022-12-13 19:21:41,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 190 transitions, 1703 flow [2022-12-13 19:21:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 190 transitions, 1651 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:41,415 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 672 flow [2022-12-13 19:21:41,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2022-12-13 19:21:41,415 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 44 predicate places. [2022-12-13 19:21:41,415 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 672 flow [2022-12-13 19:21:41,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.83333333333334) internal successors, (815), 6 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:41,416 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] [2022-12-13 19:21:41,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:41,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:21:41,617 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1301717600, now seen corresponding path program 1 times [2022-12-13 19:21:41,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:41,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989171993] [2022-12-13 19:21:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:21:41,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:41,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989171993] [2022-12-13 19:21:41,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989171993] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:41,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:41,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:41,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377993595] [2022-12-13 19:21:41,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:41,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:41,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:41,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:21:41,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2022-12-13 19:21:41,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 672 flow. Second operand has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:41,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:41,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2022-12-13 19:21:41,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:43,884 INFO L130 PetriNetUnfolder]: 24854/30026 cut-off events. [2022-12-13 19:21:43,885 INFO L131 PetriNetUnfolder]: For 177690/177690 co-relation queries the response was YES. [2022-12-13 19:21:43,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155814 conditions, 30026 events. 24854/30026 cut-off events. For 177690/177690 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 111494 event pairs, 3908 based on Foata normal form. 512/30538 useless extension candidates. Maximal degree in co-relation 134667. Up to 13156 conditions per place. [2022-12-13 19:21:44,225 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 135 selfloop transitions, 8 changer transitions 54/197 dead transitions. [2022-12-13 19:21:44,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 197 transitions, 1836 flow [2022-12-13 19:21:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:21:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:21:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 792 transitions. [2022-12-13 19:21:44,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5369491525423729 [2022-12-13 19:21:44,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 792 transitions. [2022-12-13 19:21:44,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 792 transitions. [2022-12-13 19:21:44,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:44,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 792 transitions. [2022-12-13 19:21:44,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:44,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:44,229 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:44,229 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 672 flow. Second operand 5 states and 792 transitions. [2022-12-13 19:21:44,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 197 transitions, 1836 flow [2022-12-13 19:21:44,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 197 transitions, 1756 flow, removed 28 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:44,541 INFO L231 Difference]: Finished difference. Result has 96 places, 70 transitions, 552 flow [2022-12-13 19:21:44,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=96, PETRI_TRANSITIONS=70} [2022-12-13 19:21:44,541 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2022-12-13 19:21:44,541 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 70 transitions, 552 flow [2022-12-13 19:21:44,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:44,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:44,541 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] [2022-12-13 19:21:44,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 19:21:44,542 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:44,542 INFO L85 PathProgramCache]: Analyzing trace with hash -876760190, now seen corresponding path program 2 times [2022-12-13 19:21:44,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:44,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523850994] [2022-12-13 19:21:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:44,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 19:21:44,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:44,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523850994] [2022-12-13 19:21:44,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523850994] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:21:44,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:21:44,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:21:44,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202070895] [2022-12-13 19:21:44,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:21:44,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:21:44,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:44,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:21:44,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:21:44,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 295 [2022-12-13 19:21:44,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 70 transitions, 552 flow. Second operand has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:44,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:44,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 295 [2022-12-13 19:21:44,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:46,584 INFO L130 PetriNetUnfolder]: 22304/26705 cut-off events. [2022-12-13 19:21:46,584 INFO L131 PetriNetUnfolder]: For 146670/146670 co-relation queries the response was YES. [2022-12-13 19:21:46,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138743 conditions, 26705 events. 22304/26705 cut-off events. For 146670/146670 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 93597 event pairs, 4904 based on Foata normal form. 592/27297 useless extension candidates. Maximal degree in co-relation 120845. Up to 19461 conditions per place. [2022-12-13 19:21:46,771 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 165 selfloop transitions, 12 changer transitions 0/177 dead transitions. [2022-12-13 19:21:46,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 177 transitions, 1624 flow [2022-12-13 19:21:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:21:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:21:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 778 transitions. [2022-12-13 19:21:46,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5274576271186441 [2022-12-13 19:21:46,773 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 778 transitions. [2022-12-13 19:21:46,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 778 transitions. [2022-12-13 19:21:46,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:46,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 778 transitions. [2022-12-13 19:21:46,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:46,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:46,776 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:46,776 INFO L175 Difference]: Start difference. First operand has 96 places, 70 transitions, 552 flow. Second operand 5 states and 778 transitions. [2022-12-13 19:21:46,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 177 transitions, 1624 flow [2022-12-13 19:21:47,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 177 transitions, 1570 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-12-13 19:21:47,507 INFO L231 Difference]: Finished difference. Result has 94 places, 74 transitions, 579 flow [2022-12-13 19:21:47,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=579, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2022-12-13 19:21:47,508 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 44 predicate places. [2022-12-13 19:21:47,508 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 579 flow [2022-12-13 19:21:47,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:47,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:47,508 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] [2022-12-13 19:21:47,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 19:21:47,508 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-13 19:21:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash 47720642, now seen corresponding path program 1 times [2022-12-13 19:21:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:47,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270214263] [2022-12-13 19:21:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:47,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:21:48,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270214263] [2022-12-13 19:21:48,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270214263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337329969] [2022-12-13 19:21:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:48,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:48,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:48,233 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:48,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_043b49b5-2b13-4999-bc05-9e7c90e32503/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:22:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:22:00,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:22:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:22:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:22:30,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:22:57,675 WARN L233 SmtUtils]: Spent 9.30s on a formula simplification. DAG size of input: 3279 DAG size of output: 3271 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)