./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:57:37,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:57:37,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:57:37,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:57:37,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:57:37,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:57:37,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:57:37,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:57:37,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:57:37,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:57:37,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:57:37,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:57:37,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:57:37,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:57:37,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:57:37,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:57:37,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:57:37,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:57:37,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:57:37,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:57:37,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:57:37,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:57:37,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:57:37,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:57:37,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:57:37,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:57:37,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:57:37,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:57:37,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:57:37,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:57:37,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:57:37,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:57:37,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:57:37,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:57:37,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:57:37,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:57:37,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:57:37,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:57:37,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:57:37,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:57:37,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:57:37,574 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:57:37,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:57:37,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:57:37,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:57:37,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:57:37,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:57:37,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:57:37,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:57:37,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:57:37,590 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:57:37,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:57:37,591 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:57:37,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:57:37,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:57:37,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:57:37,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:57:37,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:57:37,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:57:37,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:57:37,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:57:37,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:57:37,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:57:37,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:57:37,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:57:37,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:57:37,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:57:37,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:57:37,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:57:37,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:57:37,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:57:37,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:57:37,593 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:57:37,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:57:37,593 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:57:37,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:57:37,594 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:57:37,594 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 [2022-12-13 16:57:37,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:57:37,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:57:37,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:57:37,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:57:37,793 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:57:37,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2022-12-13 16:57:40,312 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:57:40,451 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:57:40,452 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2022-12-13 16:57:40,456 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/data/d8ce0dccd/b3065d078ff24f42ba486278d11847ee/FLAGa4343095e [2022-12-13 16:57:40,876 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/data/d8ce0dccd/b3065d078ff24f42ba486278d11847ee [2022-12-13 16:57:40,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:57:40,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:57:40,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:57:40,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:57:40,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:57:40,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:57:40" (1/1) ... [2022-12-13 16:57:40,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190130ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:40, skipping insertion in model container [2022-12-13 16:57:40,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:57:40" (1/1) ... [2022-12-13 16:57:40,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:57:40,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:57:41,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:57:41,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:57:41,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:57:41,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:57:41,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:57:41,036 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:57:41,041 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2022-12-13 16:57:41,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:57:41,055 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:57:41,065 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:57:41,066 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:57:41,067 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:57:41,068 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:57:41,069 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:57:41,070 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:57:41,073 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2022-12-13 16:57:41,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:57:41,085 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:57:41,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41 WrapperNode [2022-12-13 16:57:41,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:57:41,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:57:41,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:57:41,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:57:41,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,115 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 275 [2022-12-13 16:57:41,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:57:41,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:57:41,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:57:41,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:57:41,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,135 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:57:41,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:57:41,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:57:41,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:57:41,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (1/1) ... [2022-12-13 16:57:41,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:57:41,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:41,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:57:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:57:41,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:57:41,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:57:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:57:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:57:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:57:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:57:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:57:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:57:41,196 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 16:57:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 16:57:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:57:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 16:57:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 16:57:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:57:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:57:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:57:41,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:57:41,199 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:57:41,279 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:57:41,281 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:57:41,591 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:57:41,659 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:57:41,660 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-13 16:57:41,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:57:41 BoogieIcfgContainer [2022-12-13 16:57:41,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:57:41,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:57:41,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:57:41,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:57:41,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:57:40" (1/3) ... [2022-12-13 16:57:41,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16602b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:57:41, skipping insertion in model container [2022-12-13 16:57:41,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:57:41" (2/3) ... [2022-12-13 16:57:41,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16602b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:57:41, skipping insertion in model container [2022-12-13 16:57:41,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:57:41" (3/3) ... [2022-12-13 16:57:41,667 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2022-12-13 16:57:41,673 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:57:41,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:57:41,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:57:41,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:57:41,731 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 16:57:41,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 538 flow [2022-12-13 16:57:41,824 INFO L130 PetriNetUnfolder]: 25/254 cut-off events. [2022-12-13 16:57:41,824 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 16:57:41,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 254 events. 25/254 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-12-13 16:57:41,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 257 transitions, 538 flow [2022-12-13 16:57:41,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 243 transitions, 504 flow [2022-12-13 16:57:41,836 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:57:41,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 243 transitions, 504 flow [2022-12-13 16:57:41,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 243 transitions, 504 flow [2022-12-13 16:57:41,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 243 transitions, 504 flow [2022-12-13 16:57:41,887 INFO L130 PetriNetUnfolder]: 25/243 cut-off events. [2022-12-13 16:57:41,887 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 16:57:41,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 243 events. 25/243 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 324 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-12-13 16:57:41,891 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2022-12-13 16:57:47,968 INFO L134 LiptonReduction]: Checked pairs total: 8119 [2022-12-13 16:57:47,968 INFO L136 LiptonReduction]: Total number of compositions: 258 [2022-12-13 16:57:47,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:57:47,982 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;@4eafca12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:57:47,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 16:57:47,988 INFO L130 PetriNetUnfolder]: 8/33 cut-off events. [2022-12-13 16:57:47,988 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 16:57:47,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:47,988 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] [2022-12-13 16:57:47,989 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)] === [2022-12-13 16:57:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:47,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1910978802, now seen corresponding path program 1 times [2022-12-13 16:57:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:47,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195251046] [2022-12-13 16:57:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:47,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:48,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195251046] [2022-12-13 16:57:48,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195251046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:57:48,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:57:48,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:57:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587265529] [2022-12-13 16:57:48,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:48,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:57:48,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:57:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:57:48,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2022-12-13 16:57:48,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 227.75) internal successors, (911), 4 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:48,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:48,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2022-12-13 16:57:48,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:48,698 INFO L130 PetriNetUnfolder]: 1162/1537 cut-off events. [2022-12-13 16:57:48,699 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2022-12-13 16:57:48,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1537 events. 1162/1537 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5574 event pairs, 394 based on Foata normal form. 0/1017 useless extension candidates. Maximal degree in co-relation 2710. Up to 899 conditions per place. [2022-12-13 16:57:48,713 INFO L137 encePairwiseOnDemand]: 510/515 looper letters, 44 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2022-12-13 16:57:48,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 220 flow [2022-12-13 16:57:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:57:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:57:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 941 transitions. [2022-12-13 16:57:48,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45679611650485435 [2022-12-13 16:57:48,733 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 941 transitions. [2022-12-13 16:57:48,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 941 transitions. [2022-12-13 16:57:48,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:48,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 941 transitions. [2022-12-13 16:57:48,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.25) internal successors, (941), 4 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:48,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 515.0) internal successors, (2575), 5 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:48,748 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 515.0) internal successors, (2575), 5 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:48,749 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 4 states and 941 transitions. [2022-12-13 16:57:48,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 220 flow [2022-12-13 16:57:48,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 16:57:48,754 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2022-12-13 16:57:48,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2022-12-13 16:57:48,758 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2022-12-13 16:57:48,759 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2022-12-13 16:57:48,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.75) internal successors, (911), 4 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:48,759 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:48,759 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] [2022-12-13 16:57:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:57:48,760 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)] === [2022-12-13 16:57:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 752084179, now seen corresponding path program 1 times [2022-12-13 16:57:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:48,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861245742] [2022-12-13 16:57:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:49,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:49,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861245742] [2022-12-13 16:57:49,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861245742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:57:49,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:57:49,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:57:49,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935129192] [2022-12-13 16:57:49,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:49,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:57:49,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:57:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:57:49,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 515 [2022-12-13 16:57:49,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 95 flow. Second operand has 6 states, 6 states have (on average 217.5) internal successors, (1305), 6 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:49,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 515 [2022-12-13 16:57:49,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:49,375 INFO L130 PetriNetUnfolder]: 1163/1541 cut-off events. [2022-12-13 16:57:49,375 INFO L131 PetriNetUnfolder]: For 298/298 co-relation queries the response was YES. [2022-12-13 16:57:49,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 1541 events. 1163/1541 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5375 event pairs, 519 based on Foata normal form. 2/1147 useless extension candidates. Maximal degree in co-relation 834. Up to 1279 conditions per place. [2022-12-13 16:57:49,384 INFO L137 encePairwiseOnDemand]: 509/515 looper letters, 46 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2022-12-13 16:57:49,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 239 flow [2022-12-13 16:57:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:57:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:57:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1337 transitions. [2022-12-13 16:57:49,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43268608414239484 [2022-12-13 16:57:49,388 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1337 transitions. [2022-12-13 16:57:49,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1337 transitions. [2022-12-13 16:57:49,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:49,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1337 transitions. [2022-12-13 16:57:49,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 222.83333333333334) internal successors, (1337), 6 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 515.0) internal successors, (3605), 7 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,400 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 515.0) internal successors, (3605), 7 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,400 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 95 flow. Second operand 6 states and 1337 transitions. [2022-12-13 16:57:49,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 239 flow [2022-12-13 16:57:49,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:57:49,404 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 111 flow [2022-12-13 16:57:49,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2022-12-13 16:57:49,405 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2022-12-13 16:57:49,405 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 111 flow [2022-12-13 16:57:49,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 217.5) internal successors, (1305), 6 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:49,406 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] [2022-12-13 16:57:49,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:57:49,407 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)] === [2022-12-13 16:57:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash -212285892, now seen corresponding path program 1 times [2022-12-13 16:57:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:49,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338400589] [2022-12-13 16:57:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:49,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:57:49,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338400589] [2022-12-13 16:57:49,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338400589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832882659] [2022-12-13 16:57:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:49,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:49,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:49,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:49,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:57:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:57:49,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:57:49,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:57:49,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832882659] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:49,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:57:49,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-13 16:57:49,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448751245] [2022-12-13 16:57:49,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:49,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:57:49,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:57:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:57:49,769 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 515 [2022-12-13 16:57:49,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 216.4) internal successors, (1082), 5 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:49,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 515 [2022-12-13 16:57:49,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:49,945 INFO L130 PetriNetUnfolder]: 1076/1448 cut-off events. [2022-12-13 16:57:49,946 INFO L131 PetriNetUnfolder]: For 358/470 co-relation queries the response was YES. [2022-12-13 16:57:49,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3380 conditions, 1448 events. 1076/1448 cut-off events. For 358/470 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4928 event pairs, 364 based on Foata normal form. 112/1243 useless extension candidates. Maximal degree in co-relation 3359. Up to 725 conditions per place. [2022-12-13 16:57:49,951 INFO L137 encePairwiseOnDemand]: 509/515 looper letters, 45 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2022-12-13 16:57:49,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 257 flow [2022-12-13 16:57:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:57:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:57:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1109 transitions. [2022-12-13 16:57:49,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43067961165048546 [2022-12-13 16:57:49,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1109 transitions. [2022-12-13 16:57:49,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1109 transitions. [2022-12-13 16:57:49,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:49,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1109 transitions. [2022-12-13 16:57:49,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.8) internal successors, (1109), 5 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 515.0) internal successors, (3090), 6 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,959 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 515.0) internal successors, (3090), 6 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,959 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 111 flow. Second operand 5 states and 1109 transitions. [2022-12-13 16:57:49,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 257 flow [2022-12-13 16:57:49,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 245 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 16:57:49,962 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 123 flow [2022-12-13 16:57:49,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-12-13 16:57:49,962 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2022-12-13 16:57:49,962 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 123 flow [2022-12-13 16:57:49,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.4) internal successors, (1082), 5 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:49,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:49,963 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] [2022-12-13 16:57:49,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:57:50,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 16:57:50,164 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)] === [2022-12-13 16:57:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash 791837657, now seen corresponding path program 1 times [2022-12-13 16:57:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739527846] [2022-12-13 16:57:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:57:50,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:50,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739527846] [2022-12-13 16:57:50,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739527846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:57:50,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:57:50,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:57:50,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391528056] [2022-12-13 16:57:50,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:50,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:57:50,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:50,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:57:50,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:57:50,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 515 [2022-12-13 16:57:50,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:50,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:50,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 515 [2022-12-13 16:57:50,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:50,588 INFO L130 PetriNetUnfolder]: 1837/2470 cut-off events. [2022-12-13 16:57:50,588 INFO L131 PetriNetUnfolder]: For 1083/1453 co-relation queries the response was YES. [2022-12-13 16:57:50,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6369 conditions, 2470 events. 1837/2470 cut-off events. For 1083/1453 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9781 event pairs, 522 based on Foata normal form. 371/2479 useless extension candidates. Maximal degree in co-relation 6348. Up to 1390 conditions per place. [2022-12-13 16:57:50,603 INFO L137 encePairwiseOnDemand]: 510/515 looper letters, 55 selfloop transitions, 4 changer transitions 1/63 dead transitions. [2022-12-13 16:57:50,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 63 transitions, 323 flow [2022-12-13 16:57:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:57:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:57:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2022-12-13 16:57:50,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47896440129449835 [2022-12-13 16:57:50,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2022-12-13 16:57:50,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2022-12-13 16:57:50,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:50,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2022-12-13 16:57:50,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:50,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:50,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:50,612 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 123 flow. Second operand 3 states and 740 transitions. [2022-12-13 16:57:50,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 63 transitions, 323 flow [2022-12-13 16:57:50,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 63 transitions, 315 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:57:50,618 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 143 flow [2022-12-13 16:57:50,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2022-12-13 16:57:50,618 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2022-12-13 16:57:50,619 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 143 flow [2022-12-13 16:57:50,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:50,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:50,619 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] [2022-12-13 16:57:50,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:57:50,620 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)] === [2022-12-13 16:57:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash -282957578, now seen corresponding path program 1 times [2022-12-13 16:57:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:50,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428341243] [2022-12-13 16:57:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:50,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:57:50,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428341243] [2022-12-13 16:57:50,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428341243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:57:50,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:57:50,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:57:50,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026826303] [2022-12-13 16:57:50,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:50,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:57:50,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:50,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:57:50,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:57:50,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 515 [2022-12-13 16:57:50,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:50,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:50,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 515 [2022-12-13 16:57:50,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:51,610 INFO L130 PetriNetUnfolder]: 4237/5709 cut-off events. [2022-12-13 16:57:51,611 INFO L131 PetriNetUnfolder]: For 3031/3475 co-relation queries the response was YES. [2022-12-13 16:57:51,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15458 conditions, 5709 events. 4237/5709 cut-off events. For 3031/3475 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25671 event pairs, 2344 based on Foata normal form. 566/5452 useless extension candidates. Maximal degree in co-relation 15436. Up to 2930 conditions per place. [2022-12-13 16:57:51,647 INFO L137 encePairwiseOnDemand]: 509/515 looper letters, 82 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2022-12-13 16:57:51,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 90 transitions, 485 flow [2022-12-13 16:57:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:57:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:57:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1126 transitions. [2022-12-13 16:57:51,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43728155339805824 [2022-12-13 16:57:51,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1126 transitions. [2022-12-13 16:57:51,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1126 transitions. [2022-12-13 16:57:51,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:51,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1126 transitions. [2022-12-13 16:57:51,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:51,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 515.0) internal successors, (3090), 6 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:51,660 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 515.0) internal successors, (3090), 6 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:51,660 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 143 flow. Second operand 5 states and 1126 transitions. [2022-12-13 16:57:51,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 90 transitions, 485 flow [2022-12-13 16:57:51,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 90 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:57:51,670 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 195 flow [2022-12-13 16:57:51,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2022-12-13 16:57:51,671 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2022-12-13 16:57:51,671 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 195 flow [2022-12-13 16:57:51,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:51,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:51,672 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] [2022-12-13 16:57:51,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:57:51,672 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)] === [2022-12-13 16:57:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:51,673 INFO L85 PathProgramCache]: Analyzing trace with hash -748132079, now seen corresponding path program 1 times [2022-12-13 16:57:51,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:51,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907459298] [2022-12-13 16:57:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:51,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:57:51,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:51,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907459298] [2022-12-13 16:57:51,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907459298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:51,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516094497] [2022-12-13 16:57:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:51,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:51,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:51,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:51,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:57:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 16:57:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:57:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:52,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 16:57:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:57:52,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516094497] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:52,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:57:52,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:57:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943693498] [2022-12-13 16:57:52,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:52,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:57:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:57:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:57:52,408 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 515 [2022-12-13 16:57:52,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 195 flow. Second operand has 12 states, 12 states have (on average 208.0) internal successors, (2496), 12 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:52,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:52,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 515 [2022-12-13 16:57:52,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:53,292 INFO L130 PetriNetUnfolder]: 6282/8486 cut-off events. [2022-12-13 16:57:53,292 INFO L131 PetriNetUnfolder]: For 5668/6328 co-relation queries the response was YES. [2022-12-13 16:57:53,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24070 conditions, 8486 events. 6282/8486 cut-off events. For 5668/6328 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 40757 event pairs, 3390 based on Foata normal form. 782/8040 useless extension candidates. Maximal degree in co-relation 24044. Up to 2930 conditions per place. [2022-12-13 16:57:53,329 INFO L137 encePairwiseOnDemand]: 509/515 looper letters, 127 selfloop transitions, 11 changer transitions 0/140 dead transitions. [2022-12-13 16:57:53,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 140 transitions, 785 flow [2022-12-13 16:57:53,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:57:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 16:57:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1759 transitions. [2022-12-13 16:57:53,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42694174757281556 [2022-12-13 16:57:53,332 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1759 transitions. [2022-12-13 16:57:53,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1759 transitions. [2022-12-13 16:57:53,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:53,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1759 transitions. [2022-12-13 16:57:53,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 219.875) internal successors, (1759), 8 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:53,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 515.0) internal successors, (4635), 9 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:53,340 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 515.0) internal successors, (4635), 9 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:53,340 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 195 flow. Second operand 8 states and 1759 transitions. [2022-12-13 16:57:53,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 140 transitions, 785 flow [2022-12-13 16:57:53,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 140 transitions, 781 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:57:53,366 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 267 flow [2022-12-13 16:57:53,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2022-12-13 16:57:53,367 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2022-12-13 16:57:53,367 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 267 flow [2022-12-13 16:57:53,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 208.0) internal successors, (2496), 12 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:53,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:53,368 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] [2022-12-13 16:57:53,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:57:53,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:53,569 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)] === [2022-12-13 16:57:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash 575645, now seen corresponding path program 1 times [2022-12-13 16:57:53,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:53,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150108326] [2022-12-13 16:57:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:53,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:57:53,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:53,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150108326] [2022-12-13 16:57:53,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150108326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:57:53,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:57:53,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:57:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104266423] [2022-12-13 16:57:53,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:57:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:57:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:57:54,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 515 [2022-12-13 16:57:54,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:54,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:54,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 515 [2022-12-13 16:57:54,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:54,947 INFO L130 PetriNetUnfolder]: 6192/8451 cut-off events. [2022-12-13 16:57:54,948 INFO L131 PetriNetUnfolder]: For 14212/14906 co-relation queries the response was YES. [2022-12-13 16:57:54,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26485 conditions, 8451 events. 6192/8451 cut-off events. For 14212/14906 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41586 event pairs, 3598 based on Foata normal form. 795/8016 useless extension candidates. Maximal degree in co-relation 26455. Up to 5466 conditions per place. [2022-12-13 16:57:54,985 INFO L137 encePairwiseOnDemand]: 507/515 looper letters, 83 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2022-12-13 16:57:54,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 605 flow [2022-12-13 16:57:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:57:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:57:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1311 transitions. [2022-12-13 16:57:54,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4242718446601942 [2022-12-13 16:57:54,988 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1311 transitions. [2022-12-13 16:57:54,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1311 transitions. [2022-12-13 16:57:54,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:54,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1311 transitions. [2022-12-13 16:57:54,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.5) internal successors, (1311), 6 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:54,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 515.0) internal successors, (3605), 7 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:54,995 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 515.0) internal successors, (3605), 7 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:54,995 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 267 flow. Second operand 6 states and 1311 transitions. [2022-12-13 16:57:54,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 605 flow [2022-12-13 16:57:55,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 575 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-12-13 16:57:55,026 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 294 flow [2022-12-13 16:57:55,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2022-12-13 16:57:55,027 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2022-12-13 16:57:55,027 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 294 flow [2022-12-13 16:57:55,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:55,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:55,028 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] [2022-12-13 16:57:55,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:57:55,028 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)] === [2022-12-13 16:57:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -927717765, now seen corresponding path program 2 times [2022-12-13 16:57:55,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:55,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182905756] [2022-12-13 16:57:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:55,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:57:55,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:55,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182905756] [2022-12-13 16:57:55,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182905756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:57:55,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:57:55,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 16:57:55,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592703377] [2022-12-13 16:57:55,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:55,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:57:55,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:57:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:57:55,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 515 [2022-12-13 16:57:55,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 208.25) internal successors, (1666), 8 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:55,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:55,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 515 [2022-12-13 16:57:55,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:56,426 INFO L130 PetriNetUnfolder]: 6436/8794 cut-off events. [2022-12-13 16:57:56,426 INFO L131 PetriNetUnfolder]: For 14245/14959 co-relation queries the response was YES. [2022-12-13 16:57:56,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28544 conditions, 8794 events. 6436/8794 cut-off events. For 14245/14959 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 43564 event pairs, 3634 based on Foata normal form. 795/8310 useless extension candidates. Maximal degree in co-relation 28511. Up to 5466 conditions per place. [2022-12-13 16:57:56,464 INFO L137 encePairwiseOnDemand]: 507/515 looper letters, 85 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2022-12-13 16:57:56,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 96 transitions, 644 flow [2022-12-13 16:57:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:57:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:57:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1305 transitions. [2022-12-13 16:57:56,467 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4223300970873786 [2022-12-13 16:57:56,467 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1305 transitions. [2022-12-13 16:57:56,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1305 transitions. [2022-12-13 16:57:56,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:56,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1305 transitions. [2022-12-13 16:57:56,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.5) internal successors, (1305), 6 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:56,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 515.0) internal successors, (3605), 7 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:56,473 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 515.0) internal successors, (3605), 7 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:56,474 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 294 flow. Second operand 6 states and 1305 transitions. [2022-12-13 16:57:56,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 96 transitions, 644 flow [2022-12-13 16:57:56,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 637 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:57:56,508 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 336 flow [2022-12-13 16:57:56,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2022-12-13 16:57:56,508 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2022-12-13 16:57:56,509 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 336 flow [2022-12-13 16:57:56,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 208.25) internal successors, (1666), 8 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:56,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:56,510 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] [2022-12-13 16:57:56,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:57:56,510 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:57:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1309313213, now seen corresponding path program 3 times [2022-12-13 16:57:56,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:56,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028597370] [2022-12-13 16:57:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:56,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:57:56,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:56,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028597370] [2022-12-13 16:57:56,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028597370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:57:56,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:57:56,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 16:57:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752852654] [2022-12-13 16:57:56,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:57:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:57:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:57:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:57:57,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 515 [2022-12-13 16:57:57,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 336 flow. Second operand has 9 states, 9 states have (on average 205.88888888888889) internal successors, (1853), 9 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:57,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:57,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 515 [2022-12-13 16:57:57,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:58,035 INFO L130 PetriNetUnfolder]: 5954/8145 cut-off events. [2022-12-13 16:57:58,035 INFO L131 PetriNetUnfolder]: For 17119/17821 co-relation queries the response was YES. [2022-12-13 16:57:58,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27656 conditions, 8145 events. 5954/8145 cut-off events. For 17119/17821 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39861 event pairs, 3415 based on Foata normal form. 783/7734 useless extension candidates. Maximal degree in co-relation 27622. Up to 5476 conditions per place. [2022-12-13 16:57:58,063 INFO L137 encePairwiseOnDemand]: 508/515 looper letters, 80 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2022-12-13 16:57:58,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 646 flow [2022-12-13 16:57:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:57:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:57:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1290 transitions. [2022-12-13 16:57:58,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4174757281553398 [2022-12-13 16:57:58,066 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1290 transitions. [2022-12-13 16:57:58,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1290 transitions. [2022-12-13 16:57:58,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:58,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1290 transitions. [2022-12-13 16:57:58,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:58,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 515.0) internal successors, (3605), 7 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:58,070 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 515.0) internal successors, (3605), 7 states have internal predecessors, (3605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:58,071 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 336 flow. Second operand 6 states and 1290 transitions. [2022-12-13 16:57:58,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 646 flow [2022-12-13 16:57:58,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 639 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:57:58,113 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 368 flow [2022-12-13 16:57:58,114 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2022-12-13 16:57:58,114 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2022-12-13 16:57:58,114 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 368 flow [2022-12-13 16:57:58,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 205.88888888888889) internal successors, (1853), 9 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:58,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:58,115 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] [2022-12-13 16:57:58,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:57:58,115 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:57:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash 775013410, now seen corresponding path program 1 times [2022-12-13 16:57:58,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978745339] [2022-12-13 16:57:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:58,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:57:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:58,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978745339] [2022-12-13 16:57:58,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978745339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:58,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659698705] [2022-12-13 16:57:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:58,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:58,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:58,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:58,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:57:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:58,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 16:57:58,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:58,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:57:58,543 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 [2022-12-13 16:57:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:57:58,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:58,586 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_317) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2022-12-13 16:57:58,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2022-12-13 16:57:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:57:58,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659698705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:58,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:57:58,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 16:57:58,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661023749] [2022-12-13 16:57:58,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:58,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:57:58,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:58,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:57:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=247, Unknown=1, NotChecked=32, Total=342 [2022-12-13 16:57:58,805 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 515 [2022-12-13 16:57:58,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 368 flow. Second operand has 19 states, 19 states have (on average 170.52631578947367) internal successors, (3240), 19 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:58,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:58,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 515 [2022-12-13 16:57:58,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:59,986 INFO L130 PetriNetUnfolder]: 6225/8511 cut-off events. [2022-12-13 16:57:59,986 INFO L131 PetriNetUnfolder]: For 22605/23361 co-relation queries the response was YES. [2022-12-13 16:57:59,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30276 conditions, 8511 events. 6225/8511 cut-off events. For 22605/23361 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 41862 event pairs, 3357 based on Foata normal form. 859/8127 useless extension candidates. Maximal degree in co-relation 30241. Up to 2838 conditions per place. [2022-12-13 16:58:00,015 INFO L137 encePairwiseOnDemand]: 507/515 looper letters, 119 selfloop transitions, 15 changer transitions 0/136 dead transitions. [2022-12-13 16:58:00,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 136 transitions, 943 flow [2022-12-13 16:58:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:58:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 16:58:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1627 transitions. [2022-12-13 16:58:00,018 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.351024811218986 [2022-12-13 16:58:00,018 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1627 transitions. [2022-12-13 16:58:00,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1627 transitions. [2022-12-13 16:58:00,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:00,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1627 transitions. [2022-12-13 16:58:00,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.77777777777777) internal successors, (1627), 9 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:00,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 515.0) internal successors, (5150), 10 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:00,025 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 515.0) internal successors, (5150), 10 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:00,025 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 368 flow. Second operand 9 states and 1627 transitions. [2022-12-13 16:58:00,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 136 transitions, 943 flow [2022-12-13 16:58:00,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 136 transitions, 923 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 16:58:00,056 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 426 flow [2022-12-13 16:58:00,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=426, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2022-12-13 16:58:00,056 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2022-12-13 16:58:00,057 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 426 flow [2022-12-13 16:58:00,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 170.52631578947367) internal successors, (3240), 19 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:00,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:00,057 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] [2022-12-13 16:58:00,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:58:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:58:00,258 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:58:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -639978686, now seen corresponding path program 2 times [2022-12-13 16:58:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:00,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013643919] [2022-12-13 16:58:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:58:00,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013643919] [2022-12-13 16:58:00,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013643919] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349924162] [2022-12-13 16:58:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:58:00,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:00,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:00,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:00,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:58:00,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:58:00,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:58:00,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:58:00,822 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 [2022-12-13 16:58:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:58:00,865 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 [2022-12-13 16:58:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:58:00,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:00,920 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_371) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2022-12-13 16:58:02,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2022-12-13 16:58:03,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-12-13 16:58:03,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-12-13 16:58:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:58:03,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349924162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:03,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:03,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2022-12-13 16:58:03,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308357440] [2022-12-13 16:58:03,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:03,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:58:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:58:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=312, Unknown=3, NotChecked=36, Total=420 [2022-12-13 16:58:03,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 515 [2022-12-13 16:58:03,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 426 flow. Second operand has 21 states, 21 states have (on average 167.61904761904762) internal successors, (3520), 21 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:03,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:03,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 515 [2022-12-13 16:58:03,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:04,366 INFO L130 PetriNetUnfolder]: 5678/7809 cut-off events. [2022-12-13 16:58:04,366 INFO L131 PetriNetUnfolder]: For 24549/25255 co-relation queries the response was YES. [2022-12-13 16:58:04,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29047 conditions, 7809 events. 5678/7809 cut-off events. For 24549/25255 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38016 event pairs, 3071 based on Foata normal form. 796/7474 useless extension candidates. Maximal degree in co-relation 29010. Up to 2838 conditions per place. [2022-12-13 16:58:04,400 INFO L137 encePairwiseOnDemand]: 508/515 looper letters, 114 selfloop transitions, 16 changer transitions 0/132 dead transitions. [2022-12-13 16:58:04,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 132 transitions, 949 flow [2022-12-13 16:58:04,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:58:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 16:58:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1596 transitions. [2022-12-13 16:58:04,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34433656957928804 [2022-12-13 16:58:04,406 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1596 transitions. [2022-12-13 16:58:04,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1596 transitions. [2022-12-13 16:58:04,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:04,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1596 transitions. [2022-12-13 16:58:04,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.33333333333334) internal successors, (1596), 9 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:04,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 515.0) internal successors, (5150), 10 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:04,412 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 515.0) internal successors, (5150), 10 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:04,412 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 426 flow. Second operand 9 states and 1596 transitions. [2022-12-13 16:58:04,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 132 transitions, 949 flow [2022-12-13 16:58:04,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 132 transitions, 918 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-12-13 16:58:04,448 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 448 flow [2022-12-13 16:58:04,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=448, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2022-12-13 16:58:04,448 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2022-12-13 16:58:04,448 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 448 flow [2022-12-13 16:58:04,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.61904761904762) internal successors, (3520), 21 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:04,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:04,449 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:04,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:58:04,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 16:58:04,651 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:58:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:04,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1784399414, now seen corresponding path program 2 times [2022-12-13 16:58:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:04,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129344940] [2022-12-13 16:58:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:04,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:58:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:05,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129344940] [2022-12-13 16:58:05,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129344940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:05,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758161734] [2022-12-13 16:58:05,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:58:05,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:05,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:05,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:05,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:58:05,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:58:05,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 16:58:05,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:05,713 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 [2022-12-13 16:58:05,858 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-12-13 16:58:05,859 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 17 treesize of output 13 [2022-12-13 16:58:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:58:05,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:06,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:58:06,082 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 62 treesize of output 58 [2022-12-13 16:58:06,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:58:06,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 38 [2022-12-13 16:58:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:58:06,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758161734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:06,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:06,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 36 [2022-12-13 16:58:06,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753671126] [2022-12-13 16:58:06,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:06,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 16:58:06,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:06,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 16:58:06,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 16:58:09,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 515 [2022-12-13 16:58:09,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 448 flow. Second operand has 37 states, 37 states have (on average 187.9189189189189) internal successors, (6953), 37 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:09,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:09,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 515 [2022-12-13 16:58:09,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:21,535 INFO L130 PetriNetUnfolder]: 33775/46676 cut-off events. [2022-12-13 16:58:21,535 INFO L131 PetriNetUnfolder]: For 152976/152976 co-relation queries the response was YES. [2022-12-13 16:58:21,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186829 conditions, 46676 events. 33775/46676 cut-off events. For 152976/152976 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 282761 event pairs, 5916 based on Foata normal form. 76/41870 useless extension candidates. Maximal degree in co-relation 116073. Up to 6800 conditions per place. [2022-12-13 16:58:21,758 INFO L137 encePairwiseOnDemand]: 498/515 looper letters, 915 selfloop transitions, 454 changer transitions 207/1576 dead transitions. [2022-12-13 16:58:21,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 1576 transitions, 13958 flow [2022-12-13 16:58:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-12-13 16:58:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-12-13 16:58:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 17926 transitions. [2022-12-13 16:58:21,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3825029339592446 [2022-12-13 16:58:21,781 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 17926 transitions. [2022-12-13 16:58:21,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 17926 transitions. [2022-12-13 16:58:21,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:21,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 17926 transitions. [2022-12-13 16:58:21,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 196.98901098901098) internal successors, (17926), 91 states have internal predecessors, (17926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:21,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 515.0) internal successors, (47380), 92 states have internal predecessors, (47380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:21,887 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 515.0) internal successors, (47380), 92 states have internal predecessors, (47380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:21,887 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 448 flow. Second operand 91 states and 17926 transitions. [2022-12-13 16:58:21,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 1576 transitions, 13958 flow [2022-12-13 16:58:23,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 1576 transitions, 13520 flow, removed 36 selfloop flow, removed 7 redundant places. [2022-12-13 16:58:23,224 INFO L231 Difference]: Finished difference. Result has 214 places, 628 transitions, 7165 flow [2022-12-13 16:58:23,225 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=7165, PETRI_PLACES=214, PETRI_TRANSITIONS=628} [2022-12-13 16:58:23,225 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 178 predicate places. [2022-12-13 16:58:23,225 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 628 transitions, 7165 flow [2022-12-13 16:58:23,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 187.9189189189189) internal successors, (6953), 37 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:23,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:23,227 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:23,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:58:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:23,428 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:58:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1746291572, now seen corresponding path program 3 times [2022-12-13 16:58:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:23,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057528844] [2022-12-13 16:58:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:58:24,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:24,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057528844] [2022-12-13 16:58:24,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057528844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:24,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037717017] [2022-12-13 16:58:24,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:58:24,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:24,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:24,442 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:24,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:58:24,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:58:24,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:24,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:58:24,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:58:24,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:25,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:58:25,034 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 20 treesize of output 18 [2022-12-13 16:58:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:58:25,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037717017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:25,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:25,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 12] total 36 [2022-12-13 16:58:25,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133946909] [2022-12-13 16:58:25,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:25,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 16:58:25,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:25,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 16:58:25,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 16:58:28,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 515 [2022-12-13 16:58:28,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 628 transitions, 7165 flow. Second operand has 37 states, 37 states have (on average 184.8918918918919) internal successors, (6841), 37 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:28,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:28,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 515 [2022-12-13 16:58:28,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:49,309 INFO L130 PetriNetUnfolder]: 59711/81516 cut-off events. [2022-12-13 16:58:49,309 INFO L131 PetriNetUnfolder]: For 1773077/1773077 co-relation queries the response was YES. [2022-12-13 16:58:49,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563887 conditions, 81516 events. 59711/81516 cut-off events. For 1773077/1773077 co-relation queries the response was YES. Maximal size of possible extension queue 2668. Compared 508276 event pairs, 6741 based on Foata normal form. 26/81542 useless extension candidates. Maximal degree in co-relation 520014. Up to 13695 conditions per place. [2022-12-13 16:58:50,261 INFO L137 encePairwiseOnDemand]: 494/515 looper letters, 1666 selfloop transitions, 1614 changer transitions 70/3350 dead transitions. [2022-12-13 16:58:50,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 3350 transitions, 45065 flow [2022-12-13 16:58:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-13 16:58:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-12-13 16:58:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 14511 transitions. [2022-12-13 16:58:50,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3756893203883495 [2022-12-13 16:58:50,274 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 14511 transitions. [2022-12-13 16:58:50,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 14511 transitions. [2022-12-13 16:58:50,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:50,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 14511 transitions. [2022-12-13 16:58:50,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 193.48) internal successors, (14511), 75 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:50,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 515.0) internal successors, (39140), 76 states have internal predecessors, (39140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:50,311 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 515.0) internal successors, (39140), 76 states have internal predecessors, (39140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:50,311 INFO L175 Difference]: Start difference. First operand has 214 places, 628 transitions, 7165 flow. Second operand 75 states and 14511 transitions. [2022-12-13 16:58:50,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 3350 transitions, 45065 flow [2022-12-13 16:59:13,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 3350 transitions, 41151 flow, removed 1904 selfloop flow, removed 6 redundant places. [2022-12-13 16:59:14,008 INFO L231 Difference]: Finished difference. Result has 342 places, 2035 transitions, 27304 flow [2022-12-13 16:59:14,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=6182, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=27304, PETRI_PLACES=342, PETRI_TRANSITIONS=2035} [2022-12-13 16:59:14,008 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 306 predicate places. [2022-12-13 16:59:14,009 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 2035 transitions, 27304 flow [2022-12-13 16:59:14,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 184.8918918918919) internal successors, (6841), 37 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:59:14,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:59:14,009 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:59:14,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:59:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:59:14,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 16:59:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:59:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1465619872, now seen corresponding path program 4 times [2022-12-13 16:59:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:59:14,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435929424] [2022-12-13 16:59:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:59:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:59:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:59:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:59:15,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:59:15,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435929424] [2022-12-13 16:59:15,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435929424] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:59:15,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125374895] [2022-12-13 16:59:15,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:59:15,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:59:15,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:59:15,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:59:15,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:59:15,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:59:15,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:59:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:59:15,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:59:15,749 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-12-13 16:59:15,749 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 17 treesize of output 13 [2022-12-13 16:59:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 16:59:15,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:59:15,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:59:15,905 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 25 treesize of output 21 [2022-12-13 16:59:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 16:59:16,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125374895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:59:16,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:59:16,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 36 [2022-12-13 16:59:16,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607025287] [2022-12-13 16:59:16,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:59:16,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 16:59:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:59:16,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 16:59:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 16:59:21,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 515 [2022-12-13 16:59:21,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 2035 transitions, 27304 flow. Second operand has 36 states, 36 states have (on average 182.22222222222223) internal successors, (6560), 36 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:59:21,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:59:21,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 515 [2022-12-13 16:59:21,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:48,047 INFO L130 PetriNetUnfolder]: 129910/176221 cut-off events. [2022-12-13 17:00:48,047 INFO L131 PetriNetUnfolder]: For 6530723/6530723 co-relation queries the response was YES. [2022-12-13 17:00:50,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1589000 conditions, 176221 events. 129910/176221 cut-off events. For 6530723/6530723 co-relation queries the response was YES. Maximal size of possible extension queue 5796. Compared 1186926 event pairs, 5554 based on Foata normal form. 352/176573 useless extension candidates. Maximal degree in co-relation 1587089. Up to 36827 conditions per place. [2022-12-13 17:00:51,788 INFO L137 encePairwiseOnDemand]: 496/515 looper letters, 5305 selfloop transitions, 4415 changer transitions 233/9953 dead transitions. [2022-12-13 17:00:51,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 9953 transitions, 159890 flow [2022-12-13 17:00:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-12-13 17:00:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2022-12-13 17:00:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 36144 transitions. [2022-12-13 17:00:51,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3693817066939193 [2022-12-13 17:00:51,835 INFO L72 ComplementDD]: Start complementDD. Operand 190 states and 36144 transitions. [2022-12-13 17:00:51,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 190 states and 36144 transitions. [2022-12-13 17:00:51,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:51,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 190 states and 36144 transitions. [2022-12-13 17:00:51,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 191 states, 190 states have (on average 190.23157894736843) internal successors, (36144), 190 states have internal predecessors, (36144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:51,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 191 states, 191 states have (on average 515.0) internal successors, (98365), 191 states have internal predecessors, (98365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:51,941 INFO L81 ComplementDD]: Finished complementDD. Result has 191 states, 191 states have (on average 515.0) internal successors, (98365), 191 states have internal predecessors, (98365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:51,942 INFO L175 Difference]: Start difference. First operand has 342 places, 2035 transitions, 27304 flow. Second operand 190 states and 36144 transitions. [2022-12-13 17:00:51,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 9953 transitions, 159890 flow [2022-12-13 17:06:11,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 9953 transitions, 146504 flow, removed 6689 selfloop flow, removed 4 redundant places. [2022-12-13 17:06:11,854 INFO L231 Difference]: Finished difference. Result has 667 places, 5594 transitions, 89666 flow [2022-12-13 17:06:11,855 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=25646, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=190, PETRI_FLOW=89666, PETRI_PLACES=667, PETRI_TRANSITIONS=5594} [2022-12-13 17:06:11,855 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 631 predicate places. [2022-12-13 17:06:11,856 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 5594 transitions, 89666 flow [2022-12-13 17:06:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 182.22222222222223) internal successors, (6560), 36 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:11,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:11,856 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:06:11,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:06:12,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 17:06:12,057 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 17:06:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:12,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1016073356, now seen corresponding path program 5 times [2022-12-13 17:06:12,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:12,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324358363] [2022-12-13 17:06:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:12,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:06:12,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324358363] [2022-12-13 17:06:12,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324358363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:06:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186681981] [2022-12-13 17:06:12,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:06:12,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:06:12,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:06:12,510 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:06:12,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0908908-b18f-4f0f-960e-c4fe3e076837/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:06:12,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:06:12,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:06:12,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:06:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:06:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:06:12,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:06:13,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:06:13,025 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 20 treesize of output 18 [2022-12-13 17:06:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:06:13,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186681981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:06:13,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:06:13,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 32 [2022-12-13 17:06:13,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637420709] [2022-12-13 17:06:13,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:06:13,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 17:06:13,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:13,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 17:06:13,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 17:06:15,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 515 [2022-12-13 17:06:15,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 5594 transitions, 89666 flow. Second operand has 33 states, 33 states have (on average 192.12121212121212) internal successors, (6340), 33 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:15,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:15,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 515 [2022-12-13 17:06:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:08:37,836 INFO L130 PetriNetUnfolder]: 95823/134129 cut-off events. [2022-12-13 17:08:37,837 INFO L131 PetriNetUnfolder]: For 16233335/16233335 co-relation queries the response was YES. [2022-12-13 17:08:42,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1772177 conditions, 134129 events. 95823/134129 cut-off events. For 16233335/16233335 co-relation queries the response was YES. Maximal size of possible extension queue 4771. Compared 933206 event pairs, 5354 based on Foata normal form. 8063/142192 useless extension candidates. Maximal degree in co-relation 1771556. Up to 28690 conditions per place. [2022-12-13 17:08:43,547 INFO L137 encePairwiseOnDemand]: 495/515 looper letters, 2731 selfloop transitions, 8614 changer transitions 439/11784 dead transitions. [2022-12-13 17:08:43,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 11784 transitions, 224321 flow [2022-12-13 17:08:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-12-13 17:08:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2022-12-13 17:08:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 40489 transitions. [2022-12-13 17:08:43,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3835093535401373 [2022-12-13 17:08:43,577 INFO L72 ComplementDD]: Start complementDD. Operand 205 states and 40489 transitions. [2022-12-13 17:08:43,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 205 states and 40489 transitions. [2022-12-13 17:08:43,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:08:43,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 205 states and 40489 transitions. [2022-12-13 17:08:43,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 206 states, 205 states have (on average 197.50731707317073) internal successors, (40489), 205 states have internal predecessors, (40489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:43,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 206 states, 206 states have (on average 515.0) internal successors, (106090), 206 states have internal predecessors, (106090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:43,681 INFO L81 ComplementDD]: Finished complementDD. Result has 206 states, 206 states have (on average 515.0) internal successors, (106090), 206 states have internal predecessors, (106090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:43,681 INFO L175 Difference]: Start difference. First operand has 667 places, 5594 transitions, 89666 flow. Second operand 205 states and 40489 transitions. [2022-12-13 17:08:43,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 11784 transitions, 224321 flow