./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8 --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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- 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-e04fb08 [2022-11-16 11:10:15,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:10:15,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:10:15,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:10:15,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:10:15,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:10:15,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:10:15,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:10:15,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:10:15,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:10:15,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:10:15,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:10:15,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:10:15,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:10:15,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:10:15,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:10:15,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:10:15,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:10:15,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:10:15,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:10:15,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:10:15,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:10:15,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:10:15,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:10:15,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:10:15,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:10:15,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:10:15,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:10:15,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:10:15,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:10:15,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:10:15,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:10:15,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:10:15,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:10:15,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:10:15,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:10:15,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:10:15,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:10:15,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:10:15,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:10:15,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:10:15,807 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:10:15,852 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:10:15,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:10:15,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:10:15,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:10:15,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:10:15,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:10:15,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:10:15,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:10:15,857 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:10:15,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:10:15,858 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:10:15,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:10:15,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:10:15,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:10:15,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:10:15,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:10:15,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:10:15,860 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:10:15,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:10:15,860 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:10:15,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:10:15,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:10:15,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:10:15,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:10:15,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:10:15,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:10:15,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:10:15,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:10:15,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:10:15,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:10:15,864 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:10:15,864 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:10:15,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:10:15,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2022-11-16 11:10:16,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:10:16,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:10:16,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:10:16,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:10:16,137 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:10:16,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-16 11:10:16,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/data/3aea0c6a6/13ddd804ea0a406b88f9adce0c3fd774/FLAG3b62131b7 [2022-11-16 11:10:16,768 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:10:16,771 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-11-16 11:10:16,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/data/3aea0c6a6/13ddd804ea0a406b88f9adce0c3fd774/FLAG3b62131b7 [2022-11-16 11:10:17,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/data/3aea0c6a6/13ddd804ea0a406b88f9adce0c3fd774 [2022-11-16 11:10:17,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:10:17,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:10:17,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:10:17,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:10:17,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:10:17,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531209ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17, skipping insertion in model container [2022-11-16 11:10:17,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:10:17,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:10:17,358 WARN L229 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_dd41e7bb-33f8-4d66-962e-ed53530c7eac/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-16 11:10:17,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:10:17,375 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:10:17,402 WARN L229 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_dd41e7bb-33f8-4d66-962e-ed53530c7eac/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-11-16 11:10:17,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:10:17,420 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:10:17,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17 WrapperNode [2022-11-16 11:10:17,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:10:17,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:10:17,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:10:17,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:10:17,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,477 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-11-16 11:10:17,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:10:17,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:10:17,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:10:17,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:10:17,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:10:17,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:10:17,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:10:17,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:10:17,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (1/1) ... [2022-11-16 11:10:17,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:10:17,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:17,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:10:17,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:10:17,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:10:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:10:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:10:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:10:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:10:17,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:10:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:10:17,599 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:10:17,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:10:17,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:10:17,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:10:17,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:10:17,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:10:17,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:10:17,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:10:17,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:10:17,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:10:17,602 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:10:17,718 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:10:17,720 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:10:18,207 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:10:18,426 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:10:18,427 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 11:10:18,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:10:18 BoogieIcfgContainer [2022-11-16 11:10:18,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:10:18,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:10:18,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:10:18,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:10:18,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:10:17" (1/3) ... [2022-11-16 11:10:18,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca2b2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:10:18, skipping insertion in model container [2022-11-16 11:10:18,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:17" (2/3) ... [2022-11-16 11:10:18,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca2b2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:10:18, skipping insertion in model container [2022-11-16 11:10:18,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:10:18" (3/3) ... [2022-11-16 11:10:18,456 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2022-11-16 11:10:18,465 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:10:18,482 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:10:18,482 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:10:18,482 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:10:18,612 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:10:18,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2022-11-16 11:10:18,783 INFO L130 PetriNetUnfolder]: 18/208 cut-off events. [2022-11-16 11:10:18,783 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:10:18,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 111 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2022-11-16 11:10:18,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2022-11-16 11:10:18,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2022-11-16 11:10:18,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:10:18,817 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21abaa8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:10:18,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 11:10:18,871 INFO L130 PetriNetUnfolder]: 18/196 cut-off events. [2022-11-16 11:10:18,871 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:10:18,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:10:18,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:18,872 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 1 more)] === [2022-11-16 11:10:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:18,878 INFO L85 PathProgramCache]: Analyzing trace with hash -708775725, now seen corresponding path program 1 times [2022-11-16 11:10:18,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:18,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924436038] [2022-11-16 11:10:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:18,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:19,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:19,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924436038] [2022-11-16 11:10:19,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924436038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:19,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:10:19,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:10:19,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941498732] [2022-11-16 11:10:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:19,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:10:19,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:10:19,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:10:19,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2022-11-16 11:10:19,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:19,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:10:19,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2022-11-16 11:10:19,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:10:19,518 INFO L130 PetriNetUnfolder]: 71/370 cut-off events. [2022-11-16 11:10:19,519 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-16 11:10:19,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1045 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2022-11-16 11:10:19,529 INFO L137 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2022-11-16 11:10:19,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2022-11-16 11:10:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:10:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:10:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2022-11-16 11:10:19,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2022-11-16 11:10:19,557 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2022-11-16 11:10:19,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2022-11-16 11:10:19,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:10:19,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2022-11-16 11:10:19,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:19,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:19,581 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:19,583 INFO L175 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2022-11-16 11:10:19,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2022-11-16 11:10:19,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:10:19,597 INFO L231 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2022-11-16 11:10:19,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2022-11-16 11:10:19,604 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2022-11-16 11:10:19,605 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2022-11-16 11:10:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:19,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:10:19,606 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:19,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:10:19,607 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 1 more)] === [2022-11-16 11:10:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:19,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1574631222, now seen corresponding path program 1 times [2022-11-16 11:10:19,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:19,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817686298] [2022-11-16 11:10:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:19,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817686298] [2022-11-16 11:10:20,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817686298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:20,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:10:20,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:10:20,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416777272] [2022-11-16 11:10:20,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:20,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:10:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:10:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:10:20,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-11-16 11:10:20,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:20,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:10:20,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-11-16 11:10:20,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:10:20,513 INFO L130 PetriNetUnfolder]: 73/454 cut-off events. [2022-11-16 11:10:20,513 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-16 11:10:20,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 454 events. 73/454 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1289 event pairs, 38 based on Foata normal form. 11/430 useless extension candidates. Maximal degree in co-relation 622. Up to 118 conditions per place. [2022-11-16 11:10:20,517 INFO L137 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2022-11-16 11:10:20,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2022-11-16 11:10:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:10:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:10:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-11-16 11:10:20,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2022-11-16 11:10:20,524 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-11-16 11:10:20,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-11-16 11:10:20,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:10:20,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-11-16 11:10:20,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:20,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:20,537 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:20,537 INFO L175 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2022-11-16 11:10:20,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2022-11-16 11:10:20,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:10:20,546 INFO L231 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2022-11-16 11:10:20,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2022-11-16 11:10:20,547 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-11-16 11:10:20,548 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2022-11-16 11:10:20,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:20,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:10:20,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:20,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:10:20,549 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 1 more)] === [2022-11-16 11:10:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 172343882, now seen corresponding path program 1 times [2022-11-16 11:10:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536069948] [2022-11-16 11:10:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:10:20,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536069948] [2022-11-16 11:10:20,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536069948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:20,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:10:20,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:10:20,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133865128] [2022-11-16 11:10:20,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:20,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:10:20,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:10:20,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:10:20,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-11-16 11:10:20,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:20,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:10:20,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-11-16 11:10:20,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:10:21,140 INFO L130 PetriNetUnfolder]: 92/479 cut-off events. [2022-11-16 11:10:21,141 INFO L131 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2022-11-16 11:10:21,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 479 events. 92/479 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1590 event pairs, 50 based on Foata normal form. 15/452 useless extension candidates. Maximal degree in co-relation 775. Up to 115 conditions per place. [2022-11-16 11:10:21,144 INFO L137 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2022-11-16 11:10:21,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2022-11-16 11:10:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:10:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:10:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2022-11-16 11:10:21,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2022-11-16 11:10:21,150 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2022-11-16 11:10:21,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2022-11-16 11:10:21,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:10:21,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2022-11-16 11:10:21,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,160 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,160 INFO L175 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2022-11-16 11:10:21,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2022-11-16 11:10:21,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:10:21,169 INFO L231 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2022-11-16 11:10:21,169 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-11-16 11:10:21,172 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-11-16 11:10:21,172 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2022-11-16 11:10:21,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:10:21,174 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:21,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:10:21,174 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 1 more)] === [2022-11-16 11:10:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:21,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1447779421, now seen corresponding path program 1 times [2022-11-16 11:10:21,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:21,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083860833] [2022-11-16 11:10:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:21,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:10:21,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:21,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083860833] [2022-11-16 11:10:21,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083860833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:21,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:10:21,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:10:21,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86493063] [2022-11-16 11:10:21,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:21,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:10:21,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:21,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:10:21,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:10:21,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 211 [2022-11-16 11:10:21,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:10:21,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 211 [2022-11-16 11:10:21,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:10:21,741 INFO L130 PetriNetUnfolder]: 82/405 cut-off events. [2022-11-16 11:10:21,742 INFO L131 PetriNetUnfolder]: For 87/91 co-relation queries the response was YES. [2022-11-16 11:10:21,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 405 events. 82/405 cut-off events. For 87/91 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1128 event pairs, 23 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 647. Up to 81 conditions per place. [2022-11-16 11:10:21,746 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 20 selfloop transitions, 4 changer transitions 0/186 dead transitions. [2022-11-16 11:10:21,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 186 transitions, 474 flow [2022-11-16 11:10:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:10:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:10:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 741 transitions. [2022-11-16 11:10:21,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8779620853080569 [2022-11-16 11:10:21,750 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 741 transitions. [2022-11-16 11:10:21,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 741 transitions. [2022-11-16 11:10:21,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:10:21,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 741 transitions. [2022-11-16 11:10:21,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.25) internal successors, (741), 4 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,784 INFO L175 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 4 states and 741 transitions. [2022-11-16 11:10:21,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 186 transitions, 474 flow [2022-11-16 11:10:21,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 186 transitions, 464 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:10:21,789 INFO L231 Difference]: Finished difference. Result has 188 places, 181 transitions, 412 flow [2022-11-16 11:10:21,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=412, PETRI_PLACES=188, PETRI_TRANSITIONS=181} [2022-11-16 11:10:21,796 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-11-16 11:10:21,796 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 181 transitions, 412 flow [2022-11-16 11:10:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:21,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:10:21,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:10:21,798 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 1 more)] === [2022-11-16 11:10:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash -366344923, now seen corresponding path program 2 times [2022-11-16 11:10:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:21,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041705941] [2022-11-16 11:10:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:21,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:10:22,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041705941] [2022-11-16 11:10:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041705941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:22,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:10:22,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:10:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947443760] [2022-11-16 11:10:22,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:22,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:10:22,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:10:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:10:22,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2022-11-16 11:10:22,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 181 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:22,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:10:22,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2022-11-16 11:10:22,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:10:22,206 INFO L130 PetriNetUnfolder]: 58/357 cut-off events. [2022-11-16 11:10:22,207 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2022-11-16 11:10:22,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 357 events. 58/357 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 849 event pairs, 15 based on Foata normal form. 2/338 useless extension candidates. Maximal degree in co-relation 576. Up to 91 conditions per place. [2022-11-16 11:10:22,209 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 17 selfloop transitions, 3 changer transitions 0/185 dead transitions. [2022-11-16 11:10:22,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 185 transitions, 466 flow [2022-11-16 11:10:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:10:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:10:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-11-16 11:10:22,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8941548183254344 [2022-11-16 11:10:22,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-11-16 11:10:22,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-11-16 11:10:22,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:10:22,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-11-16 11:10:22,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:22,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:22,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:22,216 INFO L175 Difference]: Start difference. First operand has 188 places, 181 transitions, 412 flow. Second operand 3 states and 566 transitions. [2022-11-16 11:10:22,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 185 transitions, 466 flow [2022-11-16 11:10:22,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 185 transitions, 454 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-16 11:10:22,221 INFO L231 Difference]: Finished difference. Result has 188 places, 183 transitions, 423 flow [2022-11-16 11:10:22,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2022-11-16 11:10:22,222 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-11-16 11:10:22,222 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 423 flow [2022-11-16 11:10:22,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:22,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:10:22,223 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:22,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:10:22,223 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 1 more)] === [2022-11-16 11:10:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1830132007, now seen corresponding path program 3 times [2022-11-16 11:10:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:22,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237247259] [2022-11-16 11:10:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:29,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237247259] [2022-11-16 11:10:29,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237247259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996698882] [2022-11-16 11:10:29,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:10:29,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:29,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:29,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:10:30,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:10:30,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:30,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 11:10:30,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:32,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:10:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:10:33,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:10:34,240 INFO L321 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2022-11-16 11:10:34,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 37 [2022-11-16 11:10:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:10:34,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:10:34,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996698882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:34,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:10:34,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [41] total 55 [2022-11-16 11:10:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060095599] [2022-11-16 11:10:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:10:34,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:10:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2733, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:10:34,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 211 [2022-11-16 11:10:34,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 423 flow. Second operand has 23 states, 23 states have (on average 103.65217391304348) internal successors, (2384), 23 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:34,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:10:34,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 211 [2022-11-16 11:10:34,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:10:35,773 INFO L130 PetriNetUnfolder]: 768/1680 cut-off events. [2022-11-16 11:10:35,773 INFO L131 PetriNetUnfolder]: For 891/963 co-relation queries the response was YES. [2022-11-16 11:10:35,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3677 conditions, 1680 events. 768/1680 cut-off events. For 891/963 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8607 event pairs, 71 based on Foata normal form. 1/1518 useless extension candidates. Maximal degree in co-relation 3668. Up to 909 conditions per place. [2022-11-16 11:10:35,786 INFO L137 encePairwiseOnDemand]: 172/211 looper letters, 101 selfloop transitions, 73 changer transitions 4/271 dead transitions. [2022-11-16 11:10:35,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 271 transitions, 1011 flow [2022-11-16 11:10:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:10:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-16 11:10:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3078 transitions. [2022-11-16 11:10:35,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5030233698316718 [2022-11-16 11:10:35,797 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3078 transitions. [2022-11-16 11:10:35,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3078 transitions. [2022-11-16 11:10:35,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:10:35,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3078 transitions. [2022-11-16 11:10:35,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 106.13793103448276) internal successors, (3078), 29 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:35,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 211.0) internal successors, (6330), 30 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:35,826 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 211.0) internal successors, (6330), 30 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:35,826 INFO L175 Difference]: Start difference. First operand has 188 places, 183 transitions, 423 flow. Second operand 29 states and 3078 transitions. [2022-11-16 11:10:35,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 271 transitions, 1011 flow [2022-11-16 11:10:35,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 271 transitions, 1008 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:10:35,836 INFO L231 Difference]: Finished difference. Result has 222 places, 243 transitions, 834 flow [2022-11-16 11:10:35,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=834, PETRI_PLACES=222, PETRI_TRANSITIONS=243} [2022-11-16 11:10:35,839 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 33 predicate places. [2022-11-16 11:10:35,839 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 243 transitions, 834 flow [2022-11-16 11:10:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 103.65217391304348) internal successors, (2384), 23 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:35,842 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:10:35,842 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:35,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:36,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:36,049 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 1 more)] === [2022-11-16 11:10:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1623502485, now seen corresponding path program 4 times [2022-11-16 11:10:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352519128] [2022-11-16 11:10:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:41,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:41,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352519128] [2022-11-16 11:10:41,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352519128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:41,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371866672] [2022-11-16 11:10:41,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:10:41,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:41,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:41,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:41,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:10:41,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:10:41,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:41,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 11:10:41,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:45,004 INFO L321 Elim1Store]: treesize reduction 81, result has 22.9 percent of original size [2022-11-16 11:10:45,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 38 [2022-11-16 11:10:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:10:45,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:46,169 INFO L321 Elim1Store]: treesize reduction 30, result has 87.2 percent of original size [2022-11-16 11:10:46,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 248 [2022-11-16 11:10:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:10:52,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371866672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:52,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:10:52,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 20, 20] total 65 [2022-11-16 11:10:52,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651531639] [2022-11-16 11:10:52,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:52,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 11:10:52,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:52,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 11:10:52,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=3833, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:10:52,542 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 211 [2022-11-16 11:10:52,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 243 transitions, 834 flow. Second operand has 65 states, 65 states have (on average 91.07692307692308) internal successors, (5920), 65 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:52,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:10:52,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 211 [2022-11-16 11:10:52,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:11:00,634 INFO L130 PetriNetUnfolder]: 1821/3962 cut-off events. [2022-11-16 11:11:00,634 INFO L131 PetriNetUnfolder]: For 3602/3685 co-relation queries the response was YES. [2022-11-16 11:11:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10818 conditions, 3962 events. 1821/3962 cut-off events. For 3602/3685 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 26333 event pairs, 192 based on Foata normal form. 28/3822 useless extension candidates. Maximal degree in co-relation 10802. Up to 1515 conditions per place. [2022-11-16 11:11:00,674 INFO L137 encePairwiseOnDemand]: 154/211 looper letters, 395 selfloop transitions, 210 changer transitions 8/687 dead transitions. [2022-11-16 11:11:00,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 687 transitions, 4008 flow [2022-11-16 11:11:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-16 11:11:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-11-16 11:11:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 6905 transitions. [2022-11-16 11:11:00,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4422313308569233 [2022-11-16 11:11:00,700 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 6905 transitions. [2022-11-16 11:11:00,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 6905 transitions. [2022-11-16 11:11:00,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:11:00,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 6905 transitions. [2022-11-16 11:11:00,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 93.3108108108108) internal successors, (6905), 74 states have internal predecessors, (6905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:00,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 211.0) internal successors, (15825), 75 states have internal predecessors, (15825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:00,755 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 211.0) internal successors, (15825), 75 states have internal predecessors, (15825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:00,755 INFO L175 Difference]: Start difference. First operand has 222 places, 243 transitions, 834 flow. Second operand 74 states and 6905 transitions. [2022-11-16 11:11:00,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 687 transitions, 4008 flow [2022-11-16 11:11:00,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 687 transitions, 3822 flow, removed 61 selfloop flow, removed 18 redundant places. [2022-11-16 11:11:00,782 INFO L231 Difference]: Finished difference. Result has 312 places, 434 transitions, 2388 flow [2022-11-16 11:11:00,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=2388, PETRI_PLACES=312, PETRI_TRANSITIONS=434} [2022-11-16 11:11:00,783 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 123 predicate places. [2022-11-16 11:11:00,783 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 434 transitions, 2388 flow [2022-11-16 11:11:00,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 91.07692307692308) internal successors, (5920), 65 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:00,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:11:00,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:00,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:00,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:00,993 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 1 more)] === [2022-11-16 11:11:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:00,994 INFO L85 PathProgramCache]: Analyzing trace with hash -490191561, now seen corresponding path program 5 times [2022-11-16 11:11:00,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:00,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004380392] [2022-11-16 11:11:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:00,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:05,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:05,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004380392] [2022-11-16 11:11:05,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004380392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:05,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782857082] [2022-11-16 11:11:05,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:11:05,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:05,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:05,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:05,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd41e7bb-33f8-4d66-962e-ed53530c7eac/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:11:05,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:11:05,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:11:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-16 11:11:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:05,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:11:05,961 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:11:05,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-16 11:11:07,008 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 11:11:07,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2022-11-16 11:11:07,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:11:09,660 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-16 11:11:09,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 26 [2022-11-16 11:11:10,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:11:11,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:11:11,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:11:12,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:11:13,419 INFO L321 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2022-11-16 11:11:13,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2022-11-16 11:11:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:13,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:28,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:11:28,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 155 [2022-11-16 11:11:29,122 INFO L321 Elim1Store]: treesize reduction 8, result has 91.4 percent of original size [2022-11-16 11:11:29,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 481768 treesize of output 467452 [2022-11-16 11:11:30,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:11:30,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 467368 treesize of output 426296 [2022-11-16 11:11:32,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:11:32,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 426216 treesize of output 343992 [2022-11-16 11:11:34,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:11:34,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343912 treesize of output 333704 [2022-11-16 11:11:36,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:11:36,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333624 treesize of output 313128