./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R --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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- 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-38b53e6 [2022-11-25 16:41:46,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:41:46,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:41:46,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:41:46,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:41:46,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:41:46,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:41:46,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:41:46,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:41:46,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:41:46,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:41:46,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:41:46,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:41:46,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:41:46,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:41:46,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:41:46,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:41:46,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:41:46,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:41:46,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:41:46,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:41:46,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:41:46,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:41:46,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:41:46,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:41:46,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:41:46,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:41:46,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:41:46,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:41:46,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:41:46,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:41:46,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:41:46,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:41:46,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:41:46,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:41:46,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:41:46,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:41:46,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:41:46,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:41:46,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:41:46,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:41:46,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:41:46,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:41:46,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:41:46,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:41:46,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:41:46,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:41:46,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:41:46,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:41:46,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:41:46,546 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:41:46,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:41:46,547 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:41:46,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:41:46,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:41:46,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:41:46,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:41:46,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:41:46,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:41:46,549 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:41:46,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:41:46,550 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:41:46,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:41:46,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:41:46,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:41:46,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:41:46,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:46,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:41:46,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:41:46,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:41:46,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:41:46,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:41:46,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:41:46,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:41:46,555 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:41:46,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:41:46,555 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_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-25 16:41:46,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:41:46,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:41:46,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:41:46,872 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:41:46,873 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:41:46,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-25 16:41:50,238 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:41:50,548 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:41:50,549 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-25 16:41:50,560 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/data/86df70f63/1f0854e072084eda9697c65355d6175f/FLAGa7675c2a3 [2022-11-25 16:41:50,596 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/data/86df70f63/1f0854e072084eda9697c65355d6175f [2022-11-25 16:41:50,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:41:50,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:41:50,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:50,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:41:50,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:41:50,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:50,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c52657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50, skipping insertion in model container [2022-11-25 16:41:50,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:50,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:41:50,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:41:50,823 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:41:50,827 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:41:50,832 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:41:50,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:41:50,845 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_798af8c1-d302-4f97-b5ca-b4483f821651/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-25 16:41:50,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:50,870 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:41:50,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:41:50,893 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:41:50,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 16:41:50,898 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 16:41:50,903 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_798af8c1-d302-4f97-b5ca-b4483f821651/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-25 16:41:50,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:41:50,926 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:41:50,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50 WrapperNode [2022-11-25 16:41:50,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:41:50,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:50,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:41:50,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:41:50,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:50,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,005 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2022-11-25 16:41:51,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:41:51,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:41:51,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:41:51,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:41:51,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,050 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:41:51,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:41:51,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:41:51,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:41:51,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (1/1) ... [2022-11-25 16:41:51,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:41:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:41:51,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:41:51,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:41:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:41:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 16:41:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 16:41:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 16:41:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 16:41:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:41:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:41:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:41:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 16:41:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 16:41:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 16:41:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:41:51,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:41:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:41:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:41:51,159 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 16:41:51,325 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:41:51,328 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:41:51,820 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:41:52,040 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:41:52,040 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 16:41:52,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:52 BoogieIcfgContainer [2022-11-25 16:41:52,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:41:52,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:41:52,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:41:52,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:41:52,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:41:50" (1/3) ... [2022-11-25 16:41:52,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bed968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:52, skipping insertion in model container [2022-11-25 16:41:52,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:41:50" (2/3) ... [2022-11-25 16:41:52,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bed968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:41:52, skipping insertion in model container [2022-11-25 16:41:52,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:41:52" (3/3) ... [2022-11-25 16:41:52,055 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-11-25 16:41:52,066 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 16:41:52,080 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:41:52,080 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:41:52,081 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 16:41:52,154 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 16:41:52,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 346 flow [2022-11-25 16:41:52,289 INFO L130 PetriNetUnfolder]: 13/163 cut-off events. [2022-11-25 16:41:52,289 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:41:52,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-25 16:41:52,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 346 flow [2022-11-25 16:41:52,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 154 transitions, 320 flow [2022-11-25 16:41:52,306 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 16:41:52,323 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 154 transitions, 320 flow [2022-11-25 16:41:52,327 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 154 transitions, 320 flow [2022-11-25 16:41:52,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 154 transitions, 320 flow [2022-11-25 16:41:52,380 INFO L130 PetriNetUnfolder]: 13/154 cut-off events. [2022-11-25 16:41:52,381 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:41:52,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 154 events. 13/154 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-25 16:41:52,384 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2022-11-25 16:42:01,307 INFO L134 LiptonReduction]: Checked pairs total: 561 [2022-11-25 16:42:01,308 INFO L136 LiptonReduction]: Total number of compositions: 157 [2022-11-25 16:42:01,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:42:01,340 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;@6e369310, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:42:01,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 16:42:01,359 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2022-11-25 16:42:01,359 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 16:42:01,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:01,363 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:01,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1124869392, now seen corresponding path program 1 times [2022-11-25 16:42:01,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:01,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316669909] [2022-11-25 16:42:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:01,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:02,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:02,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316669909] [2022-11-25 16:42:02,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316669909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:02,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:02,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 16:42:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730300974] [2022-11-25 16:42:02,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:02,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:02,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:02,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 322 [2022-11-25 16:42:02,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:02,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 322 [2022-11-25 16:42:02,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:02,175 INFO L130 PetriNetUnfolder]: 67/118 cut-off events. [2022-11-25 16:42:02,176 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 16:42:02,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 118 events. 67/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 319 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2022-11-25 16:42:02,180 INFO L137 encePairwiseOnDemand]: 318/322 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2022-11-25 16:42:02,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2022-11-25 16:42:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 16:42:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2022-11-25 16:42:02,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4886128364389234 [2022-11-25 16:42:02,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2022-11-25 16:42:02,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2022-11-25 16:42:02,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:02,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2022-11-25 16:42:02,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,250 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 472 transitions. [2022-11-25 16:42:02,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2022-11-25 16:42:02,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 16:42:02,257 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2022-11-25 16:42:02,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2022-11-25 16:42:02,268 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2022-11-25 16:42:02,273 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2022-11-25 16:42:02,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:02,275 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:02,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:42:02,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1138398602, now seen corresponding path program 1 times [2022-11-25 16:42:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:02,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410171503] [2022-11-25 16:42:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:02,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410171503] [2022-11-25 16:42:02,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410171503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:02,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:02,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685389945] [2022-11-25 16:42:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:02,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:02,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:02,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:02,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 322 [2022-11-25 16:42:02,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:02,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 322 [2022-11-25 16:42:02,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:02,821 INFO L130 PetriNetUnfolder]: 94/179 cut-off events. [2022-11-25 16:42:02,821 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-25 16:42:02,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 179 events. 94/179 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 577 event pairs, 26 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 144. Up to 88 conditions per place. [2022-11-25 16:42:02,826 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 34 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2022-11-25 16:42:02,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 46 transitions, 223 flow [2022-11-25 16:42:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 748 transitions. [2022-11-25 16:42:02,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4645962732919255 [2022-11-25 16:42:02,830 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 748 transitions. [2022-11-25 16:42:02,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 748 transitions. [2022-11-25 16:42:02,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:02,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 748 transitions. [2022-11-25 16:42:02,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,841 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,841 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 748 transitions. [2022-11-25 16:42:02,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 46 transitions, 223 flow [2022-11-25 16:42:02,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 46 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:02,844 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 85 flow [2022-11-25 16:42:02,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=85, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2022-11-25 16:42:02,845 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2022-11-25 16:42:02,845 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 85 flow [2022-11-25 16:42:02,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:02,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:02,847 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:02,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:42:02,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:02,848 INFO L85 PathProgramCache]: Analyzing trace with hash 404101056, now seen corresponding path program 2 times [2022-11-25 16:42:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:02,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957641008] [2022-11-25 16:42:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:02,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:02,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:02,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957641008] [2022-11-25 16:42:02,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957641008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:02,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:02,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746774235] [2022-11-25 16:42:02,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:42:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:02,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:42:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:42:03,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:03,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 142.5) internal successors, (570), 4 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:03,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:03,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:03,196 INFO L130 PetriNetUnfolder]: 81/171 cut-off events. [2022-11-25 16:42:03,196 INFO L131 PetriNetUnfolder]: For 176/194 co-relation queries the response was YES. [2022-11-25 16:42:03,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 171 events. 81/171 cut-off events. For 176/194 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 611 event pairs, 50 based on Foata normal form. 29/193 useless extension candidates. Maximal degree in co-relation 362. Up to 132 conditions per place. [2022-11-25 16:42:03,198 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 20 selfloop transitions, 2 changer transitions 12/36 dead transitions. [2022-11-25 16:42:03,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 187 flow [2022-11-25 16:42:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:42:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 16:42:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 588 transitions. [2022-11-25 16:42:03,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2022-11-25 16:42:03,202 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 588 transitions. [2022-11-25 16:42:03,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 588 transitions. [2022-11-25 16:42:03,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:03,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 588 transitions. [2022-11-25 16:42:03,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 322.0) internal successors, (1610), 5 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,210 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 322.0) internal successors, (1610), 5 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,210 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 85 flow. Second operand 4 states and 588 transitions. [2022-11-25 16:42:03,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 187 flow [2022-11-25 16:42:03,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:03,213 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 92 flow [2022-11-25 16:42:03,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2022-11-25 16:42:03,215 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2022-11-25 16:42:03,215 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 92 flow [2022-11-25 16:42:03,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.5) internal successors, (570), 4 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:03,216 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:03,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:42:03,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1187733256, now seen corresponding path program 1 times [2022-11-25 16:42:03,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:03,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836625335] [2022-11-25 16:42:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:03,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:03,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:03,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836625335] [2022-11-25 16:42:03,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836625335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:03,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:03,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926912394] [2022-11-25 16:42:03,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:03,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:03,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:03,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:03,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:03,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 322 [2022-11-25 16:42:03,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:03,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 322 [2022-11-25 16:42:03,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:03,530 INFO L130 PetriNetUnfolder]: 98/188 cut-off events. [2022-11-25 16:42:03,530 INFO L131 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-11-25 16:42:03,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 188 events. 98/188 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 609 event pairs, 28 based on Foata normal form. 6/192 useless extension candidates. Maximal degree in co-relation 518. Up to 91 conditions per place. [2022-11-25 16:42:03,533 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 32 selfloop transitions, 6 changer transitions 8/46 dead transitions. [2022-11-25 16:42:03,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 259 flow [2022-11-25 16:42:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 744 transitions. [2022-11-25 16:42:03,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.462111801242236 [2022-11-25 16:42:03,537 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 744 transitions. [2022-11-25 16:42:03,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 744 transitions. [2022-11-25 16:42:03,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:03,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 744 transitions. [2022-11-25 16:42:03,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,547 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,547 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 92 flow. Second operand 5 states and 744 transitions. [2022-11-25 16:42:03,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 259 flow [2022-11-25 16:42:03,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 245 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:03,550 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 126 flow [2022-11-25 16:42:03,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2022-11-25 16:42:03,552 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2022-11-25 16:42:03,552 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 126 flow [2022-11-25 16:42:03,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:03,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:03,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:42:03,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash -657379796, now seen corresponding path program 2 times [2022-11-25 16:42:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817198140] [2022-11-25 16:42:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:03,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:03,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817198140] [2022-11-25 16:42:03,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817198140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:03,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119234887] [2022-11-25 16:42:03,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:03,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:03,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:03,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:03,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:42:03,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:03,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:03,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:42:03,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119234887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:03,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:42:03,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-25 16:42:03,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281921688] [2022-11-25 16:42:03,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:03,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:03,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:03,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:42:04,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 322 [2022-11-25 16:42:04,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:04,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 322 [2022-11-25 16:42:04,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:04,221 INFO L130 PetriNetUnfolder]: 89/187 cut-off events. [2022-11-25 16:42:04,221 INFO L131 PetriNetUnfolder]: For 322/341 co-relation queries the response was YES. [2022-11-25 16:42:04,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 187 events. 89/187 cut-off events. For 322/341 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 671 event pairs, 44 based on Foata normal form. 32/210 useless extension candidates. Maximal degree in co-relation 601. Up to 145 conditions per place. [2022-11-25 16:42:04,223 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 22 selfloop transitions, 3 changer transitions 10/38 dead transitions. [2022-11-25 16:42:04,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 230 flow [2022-11-25 16:42:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2022-11-25 16:42:04,227 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4472049689440994 [2022-11-25 16:42:04,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2022-11-25 16:42:04,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2022-11-25 16:42:04,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:04,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2022-11-25 16:42:04,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,236 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,236 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 126 flow. Second operand 5 states and 720 transitions. [2022-11-25 16:42:04,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 230 flow [2022-11-25 16:42:04,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 220 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:04,239 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 138 flow [2022-11-25 16:42:04,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2022-11-25 16:42:04,241 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2022-11-25 16:42:04,241 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 138 flow [2022-11-25 16:42:04,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:04,242 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:04,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:04,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:04,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1437414262, now seen corresponding path program 1 times [2022-11-25 16:42:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:04,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677735190] [2022-11-25 16:42:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:04,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:04,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677735190] [2022-11-25 16:42:04,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677735190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:04,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:04,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043038075] [2022-11-25 16:42:04,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:04,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:04,655 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 322 [2022-11-25 16:42:04,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:04,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 322 [2022-11-25 16:42:04,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:04,814 INFO L130 PetriNetUnfolder]: 97/181 cut-off events. [2022-11-25 16:42:04,814 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-11-25 16:42:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 181 events. 97/181 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 549 event pairs, 26 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 580. Up to 96 conditions per place. [2022-11-25 16:42:04,821 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 36 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2022-11-25 16:42:04,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 277 flow [2022-11-25 16:42:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 739 transitions. [2022-11-25 16:42:04,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45900621118012425 [2022-11-25 16:42:04,825 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 739 transitions. [2022-11-25 16:42:04,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 739 transitions. [2022-11-25 16:42:04,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:04,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 739 transitions. [2022-11-25 16:42:04,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,833 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 138 flow. Second operand 5 states and 739 transitions. [2022-11-25 16:42:04,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 277 flow [2022-11-25 16:42:04,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 261 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 16:42:04,841 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 148 flow [2022-11-25 16:42:04,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2022-11-25 16:42:04,844 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 15 predicate places. [2022-11-25 16:42:04,844 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 148 flow [2022-11-25 16:42:04,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:04,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:04,845 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:04,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:42:04,846 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:04,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1669687941, now seen corresponding path program 1 times [2022-11-25 16:42:04,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:04,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442736765] [2022-11-25 16:42:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:04,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:04,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:04,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442736765] [2022-11-25 16:42:04,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442736765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:04,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581076556] [2022-11-25 16:42:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:04,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:04,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:04,990 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:05,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:42:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:05,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:42:05,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:05,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:05,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581076556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:05,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:05,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 16:42:05,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418146826] [2022-11-25 16:42:05,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:05,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:42:05,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:05,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:42:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:42:05,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:05,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 148 flow. Second operand has 8 states, 8 states have (on average 142.25) internal successors, (1138), 8 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:05,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:05,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:05,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:05,520 INFO L130 PetriNetUnfolder]: 105/195 cut-off events. [2022-11-25 16:42:05,520 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2022-11-25 16:42:05,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 195 events. 105/195 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 639 event pairs, 4 based on Foata normal form. 6/200 useless extension candidates. Maximal degree in co-relation 648. Up to 86 conditions per place. [2022-11-25 16:42:05,523 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 44 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-11-25 16:42:05,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 323 flow [2022-11-25 16:42:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 739 transitions. [2022-11-25 16:42:05,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45900621118012425 [2022-11-25 16:42:05,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 739 transitions. [2022-11-25 16:42:05,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 739 transitions. [2022-11-25 16:42:05,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:05,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 739 transitions. [2022-11-25 16:42:05,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:05,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:05,534 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:05,535 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 148 flow. Second operand 5 states and 739 transitions. [2022-11-25 16:42:05,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 323 flow [2022-11-25 16:42:05,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 309 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 16:42:05,538 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 170 flow [2022-11-25 16:42:05,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2022-11-25 16:42:05,539 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2022-11-25 16:42:05,539 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 170 flow [2022-11-25 16:42:05,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.25) internal successors, (1138), 8 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:05,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:05,541 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:05,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:05,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:05,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:05,749 INFO L85 PathProgramCache]: Analyzing trace with hash -980727399, now seen corresponding path program 2 times [2022-11-25 16:42:05,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:05,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773104508] [2022-11-25 16:42:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:05,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:05,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773104508] [2022-11-25 16:42:05,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773104508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:05,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:05,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682845781] [2022-11-25 16:42:05,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:05,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 322 [2022-11-25 16:42:05,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:05,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:05,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 322 [2022-11-25 16:42:05,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:06,106 INFO L130 PetriNetUnfolder]: 121/232 cut-off events. [2022-11-25 16:42:06,106 INFO L131 PetriNetUnfolder]: For 452/452 co-relation queries the response was YES. [2022-11-25 16:42:06,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 232 events. 121/232 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 770 event pairs, 38 based on Foata normal form. 2/233 useless extension candidates. Maximal degree in co-relation 829. Up to 150 conditions per place. [2022-11-25 16:42:06,109 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 41 selfloop transitions, 8 changer transitions 7/56 dead transitions. [2022-11-25 16:42:06,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 409 flow [2022-11-25 16:42:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 746 transitions. [2022-11-25 16:42:06,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46335403726708074 [2022-11-25 16:42:06,113 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 746 transitions. [2022-11-25 16:42:06,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 746 transitions. [2022-11-25 16:42:06,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:06,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 746 transitions. [2022-11-25 16:42:06,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.2) internal successors, (746), 5 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,121 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,122 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 170 flow. Second operand 5 states and 746 transitions. [2022-11-25 16:42:06,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 409 flow [2022-11-25 16:42:06,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 56 transitions, 393 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:06,127 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 205 flow [2022-11-25 16:42:06,127 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2022-11-25 16:42:06,129 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2022-11-25 16:42:06,129 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 205 flow [2022-11-25 16:42:06,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,130 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:06,130 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:06,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 16:42:06,131 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1906646988, now seen corresponding path program 2 times [2022-11-25 16:42:06,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:06,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527900857] [2022-11-25 16:42:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:06,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:06,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527900857] [2022-11-25 16:42:06,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527900857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:06,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:06,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:06,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495186220] [2022-11-25 16:42:06,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:06,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:06,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:06,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:06,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:06,283 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 322 [2022-11-25 16:42:06,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:06,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 322 [2022-11-25 16:42:06,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:06,454 INFO L130 PetriNetUnfolder]: 125/233 cut-off events. [2022-11-25 16:42:06,454 INFO L131 PetriNetUnfolder]: For 578/578 co-relation queries the response was YES. [2022-11-25 16:42:06,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 233 events. 125/233 cut-off events. For 578/578 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 20 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 951. Up to 102 conditions per place. [2022-11-25 16:42:06,457 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 44 selfloop transitions, 9 changer transitions 1/54 dead transitions. [2022-11-25 16:42:06,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 426 flow [2022-11-25 16:42:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2022-11-25 16:42:06,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46273291925465837 [2022-11-25 16:42:06,461 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2022-11-25 16:42:06,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2022-11-25 16:42:06,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:06,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2022-11-25 16:42:06,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,469 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,469 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 205 flow. Second operand 5 states and 745 transitions. [2022-11-25 16:42:06,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 426 flow [2022-11-25 16:42:06,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 403 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:06,474 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 236 flow [2022-11-25 16:42:06,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2022-11-25 16:42:06,475 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2022-11-25 16:42:06,475 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 236 flow [2022-11-25 16:42:06,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:06,476 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:06,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:42:06,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:06,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1869556985, now seen corresponding path program 3 times [2022-11-25 16:42:06,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:06,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909765723] [2022-11-25 16:42:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:06,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:06,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:06,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909765723] [2022-11-25 16:42:06,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909765723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:06,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:06,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:06,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728394313] [2022-11-25 16:42:06,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:06,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:06,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:06,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:06,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:06,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 322 [2022-11-25 16:42:06,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 236 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:06,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 322 [2022-11-25 16:42:06,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:06,790 INFO L130 PetriNetUnfolder]: 133/247 cut-off events. [2022-11-25 16:42:06,791 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-25 16:42:06,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 247 events. 133/247 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 821 event pairs, 48 based on Foata normal form. 6/252 useless extension candidates. Maximal degree in co-relation 993. Up to 148 conditions per place. [2022-11-25 16:42:06,794 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 43 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2022-11-25 16:42:06,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 420 flow [2022-11-25 16:42:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 741 transitions. [2022-11-25 16:42:06,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46024844720496894 [2022-11-25 16:42:06,797 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 741 transitions. [2022-11-25 16:42:06,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 741 transitions. [2022-11-25 16:42:06,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:06,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 741 transitions. [2022-11-25 16:42:06,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,805 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 236 flow. Second operand 5 states and 741 transitions. [2022-11-25 16:42:06,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 420 flow [2022-11-25 16:42:06,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 406 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 16:42:06,810 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 258 flow [2022-11-25 16:42:06,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2022-11-25 16:42:06,810 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2022-11-25 16:42:06,811 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 258 flow [2022-11-25 16:42:06,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:06,812 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:06,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:42:06,812 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash -183155238, now seen corresponding path program 3 times [2022-11-25 16:42:06,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:06,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887244469] [2022-11-25 16:42:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:06,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887244469] [2022-11-25 16:42:06,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887244469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:06,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:06,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:06,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243999082] [2022-11-25 16:42:06,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:06,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:06,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:06,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 322 [2022-11-25 16:42:06,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:06,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:06,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 322 [2022-11-25 16:42:06,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:07,209 INFO L130 PetriNetUnfolder]: 127/241 cut-off events. [2022-11-25 16:42:07,209 INFO L131 PetriNetUnfolder]: For 858/858 co-relation queries the response was YES. [2022-11-25 16:42:07,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 241 events. 127/241 cut-off events. For 858/858 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 793 event pairs, 40 based on Foata normal form. 6/246 useless extension candidates. Maximal degree in co-relation 1015. Up to 162 conditions per place. [2022-11-25 16:42:07,212 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 40 selfloop transitions, 12 changer transitions 8/60 dead transitions. [2022-11-25 16:42:07,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 509 flow [2022-11-25 16:42:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:42:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 16:42:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 887 transitions. [2022-11-25 16:42:07,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4591097308488613 [2022-11-25 16:42:07,217 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 887 transitions. [2022-11-25 16:42:07,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 887 transitions. [2022-11-25 16:42:07,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:07,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 887 transitions. [2022-11-25 16:42:07,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.83333333333334) internal successors, (887), 6 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 322.0) internal successors, (2254), 7 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,225 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 322.0) internal successors, (2254), 7 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,226 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 258 flow. Second operand 6 states and 887 transitions. [2022-11-25 16:42:07,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 509 flow [2022-11-25 16:42:07,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 485 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-25 16:42:07,232 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 310 flow [2022-11-25 16:42:07,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2022-11-25 16:42:07,233 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 34 predicate places. [2022-11-25 16:42:07,233 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 310 flow [2022-11-25 16:42:07,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,234 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:07,234 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:07,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 16:42:07,235 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:07,236 INFO L85 PathProgramCache]: Analyzing trace with hash -87818168, now seen corresponding path program 4 times [2022-11-25 16:42:07,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:07,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877409756] [2022-11-25 16:42:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:07,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:07,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877409756] [2022-11-25 16:42:07,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877409756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:07,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:07,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:07,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137052947] [2022-11-25 16:42:07,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:07,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:07,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:07,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:07,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 322 [2022-11-25 16:42:07,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:07,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 322 [2022-11-25 16:42:07,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:07,520 INFO L130 PetriNetUnfolder]: 110/203 cut-off events. [2022-11-25 16:42:07,520 INFO L131 PetriNetUnfolder]: For 827/827 co-relation queries the response was YES. [2022-11-25 16:42:07,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 203 events. 110/203 cut-off events. For 827/827 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 584 event pairs, 36 based on Foata normal form. 4/206 useless extension candidates. Maximal degree in co-relation 906. Up to 134 conditions per place. [2022-11-25 16:42:07,523 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 37 selfloop transitions, 12 changer transitions 1/50 dead transitions. [2022-11-25 16:42:07,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 450 flow [2022-11-25 16:42:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2022-11-25 16:42:07,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4577639751552795 [2022-11-25 16:42:07,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2022-11-25 16:42:07,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2022-11-25 16:42:07,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:07,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2022-11-25 16:42:07,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,535 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,535 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 310 flow. Second operand 5 states and 737 transitions. [2022-11-25 16:42:07,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 450 flow [2022-11-25 16:42:07,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 419 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 16:42:07,542 INFO L231 Difference]: Finished difference. Result has 56 places, 38 transitions, 291 flow [2022-11-25 16:42:07,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=56, PETRI_TRANSITIONS=38} [2022-11-25 16:42:07,543 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 34 predicate places. [2022-11-25 16:42:07,543 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 38 transitions, 291 flow [2022-11-25 16:42:07,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:07,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:07,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 16:42:07,544 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:07,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:07,545 INFO L85 PathProgramCache]: Analyzing trace with hash -487765865, now seen corresponding path program 4 times [2022-11-25 16:42:07,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:07,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939537363] [2022-11-25 16:42:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:07,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:07,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:07,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939537363] [2022-11-25 16:42:07,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939537363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:07,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:07,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:42:07,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687026209] [2022-11-25 16:42:07,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:07,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:42:07,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:42:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:07,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 322 [2022-11-25 16:42:07,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 38 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:07,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 322 [2022-11-25 16:42:07,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:07,842 INFO L130 PetriNetUnfolder]: 99/178 cut-off events. [2022-11-25 16:42:07,842 INFO L131 PetriNetUnfolder]: For 632/632 co-relation queries the response was YES. [2022-11-25 16:42:07,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 178 events. 99/178 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 478 event pairs, 31 based on Foata normal form. 6/183 useless extension candidates. Maximal degree in co-relation 779. Up to 133 conditions per place. [2022-11-25 16:42:07,845 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 37 selfloop transitions, 11 changer transitions 1/49 dead transitions. [2022-11-25 16:42:07,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 49 transitions, 425 flow [2022-11-25 16:42:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:42:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 16:42:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2022-11-25 16:42:07,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4577639751552795 [2022-11-25 16:42:07,852 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2022-11-25 16:42:07,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2022-11-25 16:42:07,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:07,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2022-11-25 16:42:07,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,859 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,860 INFO L175 Difference]: Start difference. First operand has 56 places, 38 transitions, 291 flow. Second operand 5 states and 737 transitions. [2022-11-25 16:42:07,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 49 transitions, 425 flow [2022-11-25 16:42:07,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 384 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-25 16:42:07,865 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 258 flow [2022-11-25 16:42:07,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2022-11-25 16:42:07,867 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2022-11-25 16:42:07,867 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 258 flow [2022-11-25 16:42:07,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:07,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:07,868 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:07,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 16:42:07,869 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1637680173, now seen corresponding path program 1 times [2022-11-25 16:42:07,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:07,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172097362] [2022-11-25 16:42:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:08,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172097362] [2022-11-25 16:42:08,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172097362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441868356] [2022-11-25 16:42:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:08,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:08,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:08,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:42:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:08,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 16:42:08,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:08,547 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 34 treesize of output 10 [2022-11-25 16:42:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:08,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:08,610 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 36 treesize of output 12 [2022-11-25 16:42:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:08,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441868356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:08,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:08,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-25 16:42:08,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364510449] [2022-11-25 16:42:08,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:08,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:42:08,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:08,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:42:08,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:42:08,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 322 [2022-11-25 16:42:08,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 258 flow. Second operand has 11 states, 11 states have (on average 130.54545454545453) internal successors, (1436), 11 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:08,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:08,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 322 [2022-11-25 16:42:08,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:09,277 INFO L130 PetriNetUnfolder]: 231/423 cut-off events. [2022-11-25 16:42:09,278 INFO L131 PetriNetUnfolder]: For 1026/1061 co-relation queries the response was YES. [2022-11-25 16:42:09,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1713 conditions, 423 events. 231/423 cut-off events. For 1026/1061 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1714 event pairs, 20 based on Foata normal form. 31/437 useless extension candidates. Maximal degree in co-relation 1336. Up to 193 conditions per place. [2022-11-25 16:42:09,283 INFO L137 encePairwiseOnDemand]: 315/322 looper letters, 60 selfloop transitions, 29 changer transitions 5/100 dead transitions. [2022-11-25 16:42:09,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 100 transitions, 777 flow [2022-11-25 16:42:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:42:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 16:42:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1091 transitions. [2022-11-25 16:42:09,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4235248447204969 [2022-11-25 16:42:09,288 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1091 transitions. [2022-11-25 16:42:09,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1091 transitions. [2022-11-25 16:42:09,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:09,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1091 transitions. [2022-11-25 16:42:09,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.375) internal successors, (1091), 8 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:09,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 322.0) internal successors, (2898), 9 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:09,297 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 322.0) internal successors, (2898), 9 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:09,298 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 258 flow. Second operand 8 states and 1091 transitions. [2022-11-25 16:42:09,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 100 transitions, 777 flow [2022-11-25 16:42:09,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 100 transitions, 712 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-11-25 16:42:09,304 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 549 flow [2022-11-25 16:42:09,304 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=549, PETRI_PLACES=55, PETRI_TRANSITIONS=63} [2022-11-25 16:42:09,305 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 33 predicate places. [2022-11-25 16:42:09,305 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 549 flow [2022-11-25 16:42:09,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.54545454545453) internal successors, (1436), 11 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:09,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:09,306 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:09,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:09,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 16:42:09,514 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1255379607, now seen corresponding path program 2 times [2022-11-25 16:42:09,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:09,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085423830] [2022-11-25 16:42:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:09,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 16:42:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:09,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085423830] [2022-11-25 16:42:09,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085423830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:09,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76383648] [2022-11-25 16:42:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:09,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:09,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:09,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:09,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:42:10,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:10,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:10,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 16:42:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:10,107 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 34 treesize of output 10 [2022-11-25 16:42:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:10,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:10,155 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 36 treesize of output 12 [2022-11-25 16:42:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:42:10,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76383648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:10,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:10,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-11-25 16:42:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564410088] [2022-11-25 16:42:10,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:10,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:42:10,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:42:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:42:10,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 322 [2022-11-25 16:42:10,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 549 flow. Second operand has 11 states, 11 states have (on average 130.45454545454547) internal successors, (1435), 11 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:10,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:10,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 322 [2022-11-25 16:42:10,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:11,035 INFO L130 PetriNetUnfolder]: 575/1042 cut-off events. [2022-11-25 16:42:11,035 INFO L131 PetriNetUnfolder]: For 3064/3146 co-relation queries the response was YES. [2022-11-25 16:42:11,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 1042 events. 575/1042 cut-off events. For 3064/3146 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5363 event pairs, 88 based on Foata normal form. 73/1077 useless extension candidates. Maximal degree in co-relation 2602. Up to 471 conditions per place. [2022-11-25 16:42:11,044 INFO L137 encePairwiseOnDemand]: 315/322 looper letters, 77 selfloop transitions, 48 changer transitions 19/150 dead transitions. [2022-11-25 16:42:11,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 150 transitions, 1501 flow [2022-11-25 16:42:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:42:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 16:42:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1085 transitions. [2022-11-25 16:42:11,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.421195652173913 [2022-11-25 16:42:11,049 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1085 transitions. [2022-11-25 16:42:11,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1085 transitions. [2022-11-25 16:42:11,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:11,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1085 transitions. [2022-11-25 16:42:11,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 135.625) internal successors, (1085), 8 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 322.0) internal successors, (2898), 9 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,058 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 322.0) internal successors, (2898), 9 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,058 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 549 flow. Second operand 8 states and 1085 transitions. [2022-11-25 16:42:11,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 150 transitions, 1501 flow [2022-11-25 16:42:11,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 150 transitions, 1449 flow, removed 25 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:11,069 INFO L231 Difference]: Finished difference. Result has 66 places, 100 transitions, 1128 flow [2022-11-25 16:42:11,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1128, PETRI_PLACES=66, PETRI_TRANSITIONS=100} [2022-11-25 16:42:11,070 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 44 predicate places. [2022-11-25 16:42:11,071 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 100 transitions, 1128 flow [2022-11-25 16:42:11,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.45454545454547) internal successors, (1435), 11 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:11,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:11,072 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:11,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:11,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:11,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:11,285 INFO L85 PathProgramCache]: Analyzing trace with hash -841514867, now seen corresponding path program 3 times [2022-11-25 16:42:11,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:11,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269364293] [2022-11-25 16:42:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:42:12,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269364293] [2022-11-25 16:42:12,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269364293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:12,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481713617] [2022-11-25 16:42:12,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:12,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:12,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:12,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:12,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:42:12,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:42:12,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 16:42:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:12,426 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 15 treesize of output 11 [2022-11-25 16:42:12,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:42:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:42:12,674 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 16:42:12,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 41 [2022-11-25 16:42:12,698 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 24 treesize of output 18 [2022-11-25 16:42:12,850 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-25 16:42:12,850 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 23 treesize of output 10 [2022-11-25 16:42:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:42:12,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:13,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:42:13,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 86 [2022-11-25 16:42:13,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:42:13,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 287 [2022-11-25 16:42:13,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:42:13,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 249 [2022-11-25 16:42:13,603 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 60 treesize of output 42 [2022-11-25 16:42:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:42:20,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481713617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:20,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:20,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-25 16:42:20,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804827123] [2022-11-25 16:42:20,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:20,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 16:42:20,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 16:42:20,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-25 16:42:22,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 322 [2022-11-25 16:42:22,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 100 transitions, 1128 flow. Second operand has 21 states, 21 states have (on average 119.14285714285714) internal successors, (2502), 21 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:22,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:22,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 322 [2022-11-25 16:42:22,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:23,684 INFO L130 PetriNetUnfolder]: 641/1174 cut-off events. [2022-11-25 16:42:23,685 INFO L131 PetriNetUnfolder]: For 5094/5200 co-relation queries the response was YES. [2022-11-25 16:42:23,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5409 conditions, 1174 events. 641/1174 cut-off events. For 5094/5200 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6222 event pairs, 105 based on Foata normal form. 74/1222 useless extension candidates. Maximal degree in co-relation 3735. Up to 564 conditions per place. [2022-11-25 16:42:23,695 INFO L137 encePairwiseOnDemand]: 314/322 looper letters, 78 selfloop transitions, 50 changer transitions 31/165 dead transitions. [2022-11-25 16:42:23,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 165 transitions, 1845 flow [2022-11-25 16:42:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:42:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 16:42:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1482 transitions. [2022-11-25 16:42:23,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38354037267080743 [2022-11-25 16:42:23,701 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1482 transitions. [2022-11-25 16:42:23,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1482 transitions. [2022-11-25 16:42:23,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:23,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1482 transitions. [2022-11-25 16:42:23,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 123.5) internal successors, (1482), 12 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:23,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 322.0) internal successors, (4186), 13 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:23,717 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 322.0) internal successors, (4186), 13 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:23,717 INFO L175 Difference]: Start difference. First operand has 66 places, 100 transitions, 1128 flow. Second operand 12 states and 1482 transitions. [2022-11-25 16:42:23,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 165 transitions, 1845 flow [2022-11-25 16:42:23,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 165 transitions, 1806 flow, removed 18 selfloop flow, removed 1 redundant places. [2022-11-25 16:42:23,737 INFO L231 Difference]: Finished difference. Result has 80 places, 107 transitions, 1306 flow [2022-11-25 16:42:23,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1306, PETRI_PLACES=80, PETRI_TRANSITIONS=107} [2022-11-25 16:42:23,739 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2022-11-25 16:42:23,739 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 107 transitions, 1306 flow [2022-11-25 16:42:23,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.14285714285714) internal successors, (2502), 21 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:23,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:23,740 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:23,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:23,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 16:42:23,948 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:23,949 INFO L85 PathProgramCache]: Analyzing trace with hash 604021124, now seen corresponding path program 4 times [2022-11-25 16:42:23,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:23,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354567893] [2022-11-25 16:42:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:23,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:24,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:24,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354567893] [2022-11-25 16:42:24,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354567893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:24,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948335060] [2022-11-25 16:42:24,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:42:24,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:24,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:24,114 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:24,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:42:24,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:42:24,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:24,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:24,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:24,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948335060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:24,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:24,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 16:42:24,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805395650] [2022-11-25 16:42:24,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:24,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:42:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:24,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:42:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:42:24,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:24,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 107 transitions, 1306 flow. Second operand has 12 states, 12 states have (on average 141.58333333333334) internal successors, (1699), 12 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:24,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:24,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:24,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:25,375 INFO L130 PetriNetUnfolder]: 853/1600 cut-off events. [2022-11-25 16:42:25,375 INFO L131 PetriNetUnfolder]: For 6676/6676 co-relation queries the response was YES. [2022-11-25 16:42:25,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7359 conditions, 1600 events. 853/1600 cut-off events. For 6676/6676 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8950 event pairs, 22 based on Foata normal form. 32/1630 useless extension candidates. Maximal degree in co-relation 7186. Up to 603 conditions per place. [2022-11-25 16:42:25,391 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 156 selfloop transitions, 100 changer transitions 22/278 dead transitions. [2022-11-25 16:42:25,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 278 transitions, 3348 flow [2022-11-25 16:42:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 16:42:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 16:42:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2899 transitions. [2022-11-25 16:42:25,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4501552795031056 [2022-11-25 16:42:25,401 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2899 transitions. [2022-11-25 16:42:25,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2899 transitions. [2022-11-25 16:42:25,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:25,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2899 transitions. [2022-11-25 16:42:25,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 144.95) internal successors, (2899), 20 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:25,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 322.0) internal successors, (6762), 21 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:25,422 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 322.0) internal successors, (6762), 21 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:25,422 INFO L175 Difference]: Start difference. First operand has 80 places, 107 transitions, 1306 flow. Second operand 20 states and 2899 transitions. [2022-11-25 16:42:25,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 278 transitions, 3348 flow [2022-11-25 16:42:25,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 278 transitions, 3087 flow, removed 111 selfloop flow, removed 5 redundant places. [2022-11-25 16:42:25,460 INFO L231 Difference]: Finished difference. Result has 104 places, 174 transitions, 2224 flow [2022-11-25 16:42:25,460 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2224, PETRI_PLACES=104, PETRI_TRANSITIONS=174} [2022-11-25 16:42:25,461 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 82 predicate places. [2022-11-25 16:42:25,461 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 174 transitions, 2224 flow [2022-11-25 16:42:25,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.58333333333334) internal successors, (1699), 12 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:25,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:25,462 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:25,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:25,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 16:42:25,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 923940096, now seen corresponding path program 5 times [2022-11-25 16:42:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:25,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351536443] [2022-11-25 16:42:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:25,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:25,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351536443] [2022-11-25 16:42:25,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351536443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:25,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673096403] [2022-11-25 16:42:25,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:42:25,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:25,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:25,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:25,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:42:25,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 16:42:25,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:26,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:26,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673096403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:26,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:26,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 16:42:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355234346] [2022-11-25 16:42:26,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:26,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:42:26,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:42:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:42:26,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:26,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 174 transitions, 2224 flow. Second operand has 12 states, 12 states have (on average 141.33333333333334) internal successors, (1696), 12 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:26,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:26,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:26,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:27,093 INFO L130 PetriNetUnfolder]: 768/1498 cut-off events. [2022-11-25 16:42:27,093 INFO L131 PetriNetUnfolder]: For 11393/11393 co-relation queries the response was YES. [2022-11-25 16:42:27,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8757 conditions, 1498 events. 768/1498 cut-off events. For 11393/11393 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8683 event pairs, 94 based on Foata normal form. 64/1560 useless extension candidates. Maximal degree in co-relation 8279. Up to 779 conditions per place. [2022-11-25 16:42:27,112 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 158 selfloop transitions, 93 changer transitions 1/252 dead transitions. [2022-11-25 16:42:27,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 252 transitions, 3461 flow [2022-11-25 16:42:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 16:42:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 16:42:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2044 transitions. [2022-11-25 16:42:27,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.453416149068323 [2022-11-25 16:42:27,118 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2044 transitions. [2022-11-25 16:42:27,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2044 transitions. [2022-11-25 16:42:27,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:27,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2044 transitions. [2022-11-25 16:42:27,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:27,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 322.0) internal successors, (4830), 15 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:27,134 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 322.0) internal successors, (4830), 15 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:27,134 INFO L175 Difference]: Start difference. First operand has 104 places, 174 transitions, 2224 flow. Second operand 14 states and 2044 transitions. [2022-11-25 16:42:27,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 252 transitions, 3461 flow [2022-11-25 16:42:27,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 252 transitions, 3050 flow, removed 174 selfloop flow, removed 6 redundant places. [2022-11-25 16:42:27,223 INFO L231 Difference]: Finished difference. Result has 116 places, 187 transitions, 2376 flow [2022-11-25 16:42:27,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2376, PETRI_PLACES=116, PETRI_TRANSITIONS=187} [2022-11-25 16:42:27,224 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 94 predicate places. [2022-11-25 16:42:27,224 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 187 transitions, 2376 flow [2022-11-25 16:42:27,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.33333333333334) internal successors, (1696), 12 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:27,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:27,226 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:27,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:27,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 16:42:27,433 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash 935208135, now seen corresponding path program 6 times [2022-11-25 16:42:27,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:27,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874412972] [2022-11-25 16:42:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:27,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:27,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874412972] [2022-11-25 16:42:27,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874412972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:27,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580008518] [2022-11-25 16:42:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:42:27,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:27,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:27,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:27,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:42:27,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 16:42:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:27,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:27,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:27,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580008518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:27,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:27,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 16:42:27,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953739300] [2022-11-25 16:42:27,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:27,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:42:27,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:27,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:42:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:42:27,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:27,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 187 transitions, 2376 flow. Second operand has 15 states, 15 states have (on average 141.13333333333333) internal successors, (2117), 15 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:27,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:27,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:27,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:28,979 INFO L130 PetriNetUnfolder]: 1012/1964 cut-off events. [2022-11-25 16:42:28,979 INFO L131 PetriNetUnfolder]: For 17655/17655 co-relation queries the response was YES. [2022-11-25 16:42:28,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11805 conditions, 1964 events. 1012/1964 cut-off events. For 17655/17655 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12074 event pairs, 313 based on Foata normal form. 92/2054 useless extension candidates. Maximal degree in co-relation 11137. Up to 1308 conditions per place. [2022-11-25 16:42:29,004 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 205 selfloop transitions, 91 changer transitions 2/298 dead transitions. [2022-11-25 16:42:29,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 298 transitions, 4262 flow [2022-11-25 16:42:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:42:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 16:42:29,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1891 transitions. [2022-11-25 16:42:29,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4517439082656474 [2022-11-25 16:42:29,008 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1891 transitions. [2022-11-25 16:42:29,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1891 transitions. [2022-11-25 16:42:29,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:29,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1891 transitions. [2022-11-25 16:42:29,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 145.46153846153845) internal successors, (1891), 13 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:29,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 322.0) internal successors, (4508), 14 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:29,019 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 322.0) internal successors, (4508), 14 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:29,020 INFO L175 Difference]: Start difference. First operand has 116 places, 187 transitions, 2376 flow. Second operand 13 states and 1891 transitions. [2022-11-25 16:42:29,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 298 transitions, 4262 flow [2022-11-25 16:42:29,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 298 transitions, 4110 flow, removed 28 selfloop flow, removed 6 redundant places. [2022-11-25 16:42:29,119 INFO L231 Difference]: Finished difference. Result has 130 places, 249 transitions, 3470 flow [2022-11-25 16:42:29,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3470, PETRI_PLACES=130, PETRI_TRANSITIONS=249} [2022-11-25 16:42:29,120 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 108 predicate places. [2022-11-25 16:42:29,121 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 249 transitions, 3470 flow [2022-11-25 16:42:29,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 141.13333333333333) internal successors, (2117), 15 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:29,122 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:29,122 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:29,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:29,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:29,328 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1859640436, now seen corresponding path program 7 times [2022-11-25 16:42:29,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:29,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975072961] [2022-11-25 16:42:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:29,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:29,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:29,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975072961] [2022-11-25 16:42:29,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975072961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:29,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628584153] [2022-11-25 16:42:29,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:42:29,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:29,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:29,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:29,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:42:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:29,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:29,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:29,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628584153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:29,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:29,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 16:42:29,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402059594] [2022-11-25 16:42:29,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:29,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:42:29,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:29,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:42:29,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:42:29,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:29,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 249 transitions, 3470 flow. Second operand has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:29,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:29,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:29,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:31,020 INFO L130 PetriNetUnfolder]: 1319/2611 cut-off events. [2022-11-25 16:42:31,020 INFO L131 PetriNetUnfolder]: For 31116/31116 co-relation queries the response was YES. [2022-11-25 16:42:31,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17453 conditions, 2611 events. 1319/2611 cut-off events. For 31116/31116 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17478 event pairs, 148 based on Foata normal form. 36/2645 useless extension candidates. Maximal degree in co-relation 16344. Up to 1167 conditions per place. [2022-11-25 16:42:31,057 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 229 selfloop transitions, 173 changer transitions 4/406 dead transitions. [2022-11-25 16:42:31,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 406 transitions, 6101 flow [2022-11-25 16:42:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 16:42:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 16:42:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2195 transitions. [2022-11-25 16:42:31,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45445134575569357 [2022-11-25 16:42:31,063 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2195 transitions. [2022-11-25 16:42:31,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2195 transitions. [2022-11-25 16:42:31,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:31,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2195 transitions. [2022-11-25 16:42:31,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 146.33333333333334) internal successors, (2195), 15 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:31,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 322.0) internal successors, (5152), 16 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:31,076 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 322.0) internal successors, (5152), 16 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:31,077 INFO L175 Difference]: Start difference. First operand has 130 places, 249 transitions, 3470 flow. Second operand 15 states and 2195 transitions. [2022-11-25 16:42:31,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 406 transitions, 6101 flow [2022-11-25 16:42:31,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 406 transitions, 5764 flow, removed 151 selfloop flow, removed 3 redundant places. [2022-11-25 16:42:31,329 INFO L231 Difference]: Finished difference. Result has 147 places, 320 transitions, 4820 flow [2022-11-25 16:42:31,330 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4820, PETRI_PLACES=147, PETRI_TRANSITIONS=320} [2022-11-25 16:42:31,330 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2022-11-25 16:42:31,330 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 320 transitions, 4820 flow [2022-11-25 16:42:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:31,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:31,331 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:31,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:31,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:31,539 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1455031592, now seen corresponding path program 8 times [2022-11-25 16:42:31,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:31,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350492305] [2022-11-25 16:42:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:31,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:31,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350492305] [2022-11-25 16:42:31,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350492305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:31,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501987846] [2022-11-25 16:42:31,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:31,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:31,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:31,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:31,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:42:31,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:31,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:31,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:31,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:32,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501987846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:32,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:32,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 16:42:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519535453] [2022-11-25 16:42:32,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:32,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:42:32,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:42:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:42:32,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:32,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 320 transitions, 4820 flow. Second operand has 15 states, 15 states have (on average 141.0) internal successors, (2115), 15 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:32,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:32,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:32,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:33,376 INFO L130 PetriNetUnfolder]: 1391/2788 cut-off events. [2022-11-25 16:42:33,376 INFO L131 PetriNetUnfolder]: For 42064/42064 co-relation queries the response was YES. [2022-11-25 16:42:33,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20005 conditions, 2788 events. 1391/2788 cut-off events. For 42064/42064 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19346 event pairs, 32 based on Foata normal form. 24/2810 useless extension candidates. Maximal degree in co-relation 18602. Up to 811 conditions per place. [2022-11-25 16:42:33,408 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 243 selfloop transitions, 185 changer transitions 18/446 dead transitions. [2022-11-25 16:42:33,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 446 transitions, 7271 flow [2022-11-25 16:42:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 16:42:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 16:42:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3321 transitions. [2022-11-25 16:42:33,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4484201998379692 [2022-11-25 16:42:33,416 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3321 transitions. [2022-11-25 16:42:33,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3321 transitions. [2022-11-25 16:42:33,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:33,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3321 transitions. [2022-11-25 16:42:33,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 144.3913043478261) internal successors, (3321), 23 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:33,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 322.0) internal successors, (7728), 24 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:33,433 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 322.0) internal successors, (7728), 24 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:33,433 INFO L175 Difference]: Start difference. First operand has 147 places, 320 transitions, 4820 flow. Second operand 23 states and 3321 transitions. [2022-11-25 16:42:33,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 446 transitions, 7271 flow [2022-11-25 16:42:33,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 446 transitions, 7046 flow, removed 83 selfloop flow, removed 5 redundant places. [2022-11-25 16:42:33,698 INFO L231 Difference]: Finished difference. Result has 174 places, 349 transitions, 5798 flow [2022-11-25 16:42:33,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5798, PETRI_PLACES=174, PETRI_TRANSITIONS=349} [2022-11-25 16:42:33,699 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 152 predicate places. [2022-11-25 16:42:33,699 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 349 transitions, 5798 flow [2022-11-25 16:42:33,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 141.0) internal successors, (2115), 15 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:33,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:33,700 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:33,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:33,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 16:42:33,901 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1664445060, now seen corresponding path program 9 times [2022-11-25 16:42:33,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:33,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142436540] [2022-11-25 16:42:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:33,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:34,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:34,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142436540] [2022-11-25 16:42:34,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142436540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:34,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771945619] [2022-11-25 16:42:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:34,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:34,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:34,039 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:34,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:42:34,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:42:34,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:34,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:34,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:34,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:34,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771945619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:34,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:34,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 16:42:34,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727488627] [2022-11-25 16:42:34,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:34,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:42:34,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:34,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:42:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:42:34,452 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:34,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 349 transitions, 5798 flow. Second operand has 15 states, 15 states have (on average 141.0) internal successors, (2115), 15 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:34,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:34,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:34,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:36,289 INFO L130 PetriNetUnfolder]: 1640/3344 cut-off events. [2022-11-25 16:42:36,289 INFO L131 PetriNetUnfolder]: For 89444/89444 co-relation queries the response was YES. [2022-11-25 16:42:36,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27720 conditions, 3344 events. 1640/3344 cut-off events. For 89444/89444 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 24381 event pairs, 278 based on Foata normal form. 42/3384 useless extension candidates. Maximal degree in co-relation 26547. Up to 1085 conditions per place. [2022-11-25 16:42:36,318 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 323 selfloop transitions, 176 changer transitions 9/508 dead transitions. [2022-11-25 16:42:36,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 508 transitions, 9095 flow [2022-11-25 16:42:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 16:42:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 16:42:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3319 transitions. [2022-11-25 16:42:36,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4481501485282204 [2022-11-25 16:42:36,327 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3319 transitions. [2022-11-25 16:42:36,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3319 transitions. [2022-11-25 16:42:36,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:36,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3319 transitions. [2022-11-25 16:42:36,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 144.30434782608697) internal successors, (3319), 23 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:36,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 322.0) internal successors, (7728), 24 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:36,346 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 322.0) internal successors, (7728), 24 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:36,346 INFO L175 Difference]: Start difference. First operand has 174 places, 349 transitions, 5798 flow. Second operand 23 states and 3319 transitions. [2022-11-25 16:42:36,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 508 transitions, 9095 flow [2022-11-25 16:42:36,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 508 transitions, 8729 flow, removed 127 selfloop flow, removed 10 redundant places. [2022-11-25 16:42:36,976 INFO L231 Difference]: Finished difference. Result has 193 places, 423 transitions, 7567 flow [2022-11-25 16:42:36,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7567, PETRI_PLACES=193, PETRI_TRANSITIONS=423} [2022-11-25 16:42:36,977 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 171 predicate places. [2022-11-25 16:42:36,978 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 423 transitions, 7567 flow [2022-11-25 16:42:36,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 141.0) internal successors, (2115), 15 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:36,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:36,979 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:36,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:37,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 16:42:37,185 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2110698779, now seen corresponding path program 10 times [2022-11-25 16:42:37,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:37,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052237029] [2022-11-25 16:42:37,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:37,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:37,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052237029] [2022-11-25 16:42:37,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052237029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98463626] [2022-11-25 16:42:37,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:42:37,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:37,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:37,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:37,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:42:37,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:42:37,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:37,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:37,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98463626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:37,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:37,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 16:42:37,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272241605] [2022-11-25 16:42:37,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:37,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:42:37,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:42:37,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:42:37,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:37,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 423 transitions, 7567 flow. Second operand has 15 states, 15 states have (on average 141.13333333333333) internal successors, (2117), 15 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:37,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:37,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:37,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:39,490 INFO L130 PetriNetUnfolder]: 1907/3829 cut-off events. [2022-11-25 16:42:39,490 INFO L131 PetriNetUnfolder]: For 128275/128275 co-relation queries the response was YES. [2022-11-25 16:42:39,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34313 conditions, 3829 events. 1907/3829 cut-off events. For 128275/128275 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 28320 event pairs, 176 based on Foata normal form. 96/3923 useless extension candidates. Maximal degree in co-relation 33133. Up to 2768 conditions per place. [2022-11-25 16:42:39,531 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 424 selfloop transitions, 141 changer transitions 9/574 dead transitions. [2022-11-25 16:42:39,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 574 transitions, 11766 flow [2022-11-25 16:42:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 16:42:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 16:42:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2464 transitions. [2022-11-25 16:42:39,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45012787723785164 [2022-11-25 16:42:39,648 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2464 transitions. [2022-11-25 16:42:39,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2464 transitions. [2022-11-25 16:42:39,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:39,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2464 transitions. [2022-11-25 16:42:39,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 144.94117647058823) internal successors, (2464), 17 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:39,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 322.0) internal successors, (5796), 18 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:39,670 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 322.0) internal successors, (5796), 18 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:39,670 INFO L175 Difference]: Start difference. First operand has 193 places, 423 transitions, 7567 flow. Second operand 17 states and 2464 transitions. [2022-11-25 16:42:39,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 574 transitions, 11766 flow [2022-11-25 16:42:41,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 574 transitions, 10292 flow, removed 699 selfloop flow, removed 6 redundant places. [2022-11-25 16:42:41,228 INFO L231 Difference]: Finished difference. Result has 211 places, 503 transitions, 8796 flow [2022-11-25 16:42:41,229 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=6469, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8796, PETRI_PLACES=211, PETRI_TRANSITIONS=503} [2022-11-25 16:42:41,229 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 189 predicate places. [2022-11-25 16:42:41,229 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 503 transitions, 8796 flow [2022-11-25 16:42:41,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 141.13333333333333) internal successors, (2117), 15 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:41,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:41,230 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:41,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:41,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:41,431 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1828335100, now seen corresponding path program 11 times [2022-11-25 16:42:41,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:41,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392202210] [2022-11-25 16:42:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:41,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:41,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392202210] [2022-11-25 16:42:41,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392202210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187498393] [2022-11-25 16:42:41,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:42:41,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:41,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:41,563 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:41,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:42:41,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:41,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:42:41,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187498393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:41,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:41,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 16:42:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130659820] [2022-11-25 16:42:41,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:41,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:42:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:41,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:42:41,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:42:41,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:41,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 503 transitions, 8796 flow. Second operand has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:41,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:41,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:41,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:43,696 INFO L130 PetriNetUnfolder]: 1918/3864 cut-off events. [2022-11-25 16:42:43,696 INFO L131 PetriNetUnfolder]: For 80733/80733 co-relation queries the response was YES. [2022-11-25 16:42:43,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29357 conditions, 3864 events. 1918/3864 cut-off events. For 80733/80733 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28759 event pairs, 700 based on Foata normal form. 64/3914 useless extension candidates. Maximal degree in co-relation 28493. Up to 3313 conditions per place. [2022-11-25 16:42:43,733 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 481 selfloop transitions, 85 changer transitions 4/570 dead transitions. [2022-11-25 16:42:43,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 570 transitions, 10692 flow [2022-11-25 16:42:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:42:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:42:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1612 transitions. [2022-11-25 16:42:43,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45511010728402035 [2022-11-25 16:42:43,737 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1612 transitions. [2022-11-25 16:42:43,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1612 transitions. [2022-11-25 16:42:43,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:43,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1612 transitions. [2022-11-25 16:42:43,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 146.54545454545453) internal successors, (1612), 11 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:43,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:43,745 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:43,746 INFO L175 Difference]: Start difference. First operand has 211 places, 503 transitions, 8796 flow. Second operand 11 states and 1612 transitions. [2022-11-25 16:42:43,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 570 transitions, 10692 flow [2022-11-25 16:42:44,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 570 transitions, 9717 flow, removed 444 selfloop flow, removed 6 redundant places. [2022-11-25 16:42:44,850 INFO L231 Difference]: Finished difference. Result has 220 places, 516 transitions, 8362 flow [2022-11-25 16:42:44,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=7854, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8362, PETRI_PLACES=220, PETRI_TRANSITIONS=516} [2022-11-25 16:42:44,851 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 198 predicate places. [2022-11-25 16:42:44,852 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 516 transitions, 8362 flow [2022-11-25 16:42:44,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:44,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:44,852 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:44,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:45,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:45,059 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:45,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:45,060 INFO L85 PathProgramCache]: Analyzing trace with hash 878283708, now seen corresponding path program 12 times [2022-11-25 16:42:45,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:45,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120563107] [2022-11-25 16:42:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:45,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:45,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120563107] [2022-11-25 16:42:45,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120563107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126243463] [2022-11-25 16:42:45,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:42:45,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:45,195 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:42:45,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 16:42:45,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:45,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:45,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:45,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:45,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126243463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:45,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:45,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 16:42:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902151249] [2022-11-25 16:42:45,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:45,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:42:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:45,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:42:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:42:45,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:45,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 516 transitions, 8362 flow. Second operand has 13 states, 13 states have (on average 141.23076923076923) internal successors, (1836), 13 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:45,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:45,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:45,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:47,760 INFO L130 PetriNetUnfolder]: 2012/4068 cut-off events. [2022-11-25 16:42:47,760 INFO L131 PetriNetUnfolder]: For 81090/81090 co-relation queries the response was YES. [2022-11-25 16:42:47,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30248 conditions, 4068 events. 2012/4068 cut-off events. For 81090/81090 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 30622 event pairs, 609 based on Foata normal form. 48/4110 useless extension candidates. Maximal degree in co-relation 29379. Up to 2887 conditions per place. [2022-11-25 16:42:47,921 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 442 selfloop transitions, 158 changer transitions 4/604 dead transitions. [2022-11-25 16:42:47,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 604 transitions, 10922 flow [2022-11-25 16:42:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:42:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 16:42:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1756 transitions. [2022-11-25 16:42:47,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45445134575569357 [2022-11-25 16:42:47,935 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1756 transitions. [2022-11-25 16:42:47,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1756 transitions. [2022-11-25 16:42:47,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:47,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1756 transitions. [2022-11-25 16:42:47,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 146.33333333333334) internal successors, (1756), 12 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:47,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 322.0) internal successors, (4186), 13 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:47,943 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 322.0) internal successors, (4186), 13 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:47,944 INFO L175 Difference]: Start difference. First operand has 220 places, 516 transitions, 8362 flow. Second operand 12 states and 1756 transitions. [2022-11-25 16:42:47,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 604 transitions, 10922 flow [2022-11-25 16:42:48,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 604 transitions, 10741 flow, removed 50 selfloop flow, removed 3 redundant places. [2022-11-25 16:42:48,689 INFO L231 Difference]: Finished difference. Result has 230 places, 544 transitions, 9355 flow [2022-11-25 16:42:48,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=8197, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9355, PETRI_PLACES=230, PETRI_TRANSITIONS=544} [2022-11-25 16:42:48,690 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 208 predicate places. [2022-11-25 16:42:48,690 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 544 transitions, 9355 flow [2022-11-25 16:42:48,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.23076923076923) internal successors, (1836), 13 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:48,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:48,691 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:48,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:48,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 16:42:48,897 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:48,898 INFO L85 PathProgramCache]: Analyzing trace with hash -842255348, now seen corresponding path program 13 times [2022-11-25 16:42:48,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:48,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034225562] [2022-11-25 16:42:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:48,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:49,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:49,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034225562] [2022-11-25 16:42:49,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034225562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:49,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951853270] [2022-11-25 16:42:49,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:42:49,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:49,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:49,076 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:49,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 16:42:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:49,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:49,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:49,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:49,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951853270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:49,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:49,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 16:42:49,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103076921] [2022-11-25 16:42:49,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:49,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:42:49,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:42:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:42:49,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:49,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 544 transitions, 9355 flow. Second operand has 13 states, 13 states have (on average 141.23076923076923) internal successors, (1836), 13 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:49,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:49,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:49,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:51,511 INFO L130 PetriNetUnfolder]: 1979/3961 cut-off events. [2022-11-25 16:42:51,511 INFO L131 PetriNetUnfolder]: For 85930/85930 co-relation queries the response was YES. [2022-11-25 16:42:51,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30711 conditions, 3961 events. 1979/3961 cut-off events. For 85930/85930 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29361 event pairs, 406 based on Foata normal form. 12/3971 useless extension candidates. Maximal degree in co-relation 29811. Up to 1603 conditions per place. [2022-11-25 16:42:51,553 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 429 selfloop transitions, 167 changer transitions 2/598 dead transitions. [2022-11-25 16:42:51,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 598 transitions, 11062 flow [2022-11-25 16:42:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 16:42:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 16:42:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2454 transitions. [2022-11-25 16:42:51,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4483010595542565 [2022-11-25 16:42:51,561 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2454 transitions. [2022-11-25 16:42:51,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2454 transitions. [2022-11-25 16:42:51,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:51,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2454 transitions. [2022-11-25 16:42:51,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 144.35294117647058) internal successors, (2454), 17 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 322.0) internal successors, (5796), 18 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,578 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 322.0) internal successors, (5796), 18 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,578 INFO L175 Difference]: Start difference. First operand has 230 places, 544 transitions, 9355 flow. Second operand 17 states and 2454 transitions. [2022-11-25 16:42:51,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 598 transitions, 11062 flow [2022-11-25 16:42:52,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 598 transitions, 10660 flow, removed 176 selfloop flow, removed 6 redundant places. [2022-11-25 16:42:52,645 INFO L231 Difference]: Finished difference. Result has 241 places, 541 transitions, 9361 flow [2022-11-25 16:42:52,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9361, PETRI_PLACES=241, PETRI_TRANSITIONS=541} [2022-11-25 16:42:52,646 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 219 predicate places. [2022-11-25 16:42:52,646 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 541 transitions, 9361 flow [2022-11-25 16:42:52,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.23076923076923) internal successors, (1836), 13 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:52,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:52,647 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:52,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:52,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 16:42:52,853 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash 640210075, now seen corresponding path program 14 times [2022-11-25 16:42:52,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:52,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683801653] [2022-11-25 16:42:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683801653] [2022-11-25 16:42:52,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683801653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40225105] [2022-11-25 16:42:52,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:42:52,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:52,991 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:53,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 16:42:53,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:42:53,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:53,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:53,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:53,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:53,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40225105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:53,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:53,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 16:42:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93748330] [2022-11-25 16:42:53,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:42:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:42:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:42:53,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:53,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 541 transitions, 9361 flow. Second operand has 11 states, 11 states have (on average 141.63636363636363) internal successors, (1558), 11 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:53,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:55,382 INFO L130 PetriNetUnfolder]: 2213/4369 cut-off events. [2022-11-25 16:42:55,382 INFO L131 PetriNetUnfolder]: For 107033/107033 co-relation queries the response was YES. [2022-11-25 16:42:55,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35461 conditions, 4369 events. 2213/4369 cut-off events. For 107033/107033 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32596 event pairs, 136 based on Foata normal form. 36/4403 useless extension candidates. Maximal degree in co-relation 34492. Up to 3099 conditions per place. [2022-11-25 16:42:55,420 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 475 selfloop transitions, 158 changer transitions 0/633 dead transitions. [2022-11-25 16:42:55,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 633 transitions, 12211 flow [2022-11-25 16:42:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:42:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 16:42:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1024 transitions. [2022-11-25 16:42:55,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45430346051464066 [2022-11-25 16:42:55,423 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1024 transitions. [2022-11-25 16:42:55,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1024 transitions. [2022-11-25 16:42:55,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:55,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1024 transitions. [2022-11-25 16:42:55,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,429 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,430 INFO L175 Difference]: Start difference. First operand has 241 places, 541 transitions, 9361 flow. Second operand 7 states and 1024 transitions. [2022-11-25 16:42:55,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 633 transitions, 12211 flow [2022-11-25 16:42:56,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 633 transitions, 12119 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-11-25 16:42:56,422 INFO L231 Difference]: Finished difference. Result has 243 places, 581 transitions, 10654 flow [2022-11-25 16:42:56,422 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=9246, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10654, PETRI_PLACES=243, PETRI_TRANSITIONS=581} [2022-11-25 16:42:56,423 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 221 predicate places. [2022-11-25 16:42:56,423 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 581 transitions, 10654 flow [2022-11-25 16:42:56,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 141.63636363636363) internal successors, (1558), 11 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:56,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:42:56,424 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:42:56,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 16:42:56,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 16:42:56,630 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:42:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash -538844160, now seen corresponding path program 15 times [2022-11-25 16:42:56,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:56,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975936303] [2022-11-25 16:42:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:56,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:56,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:56,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975936303] [2022-11-25 16:42:56,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975936303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:56,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049810924] [2022-11-25 16:42:56,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:42:56,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:56,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:56,765 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:56,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 16:42:56,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:42:56,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:42:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:42:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:57,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:42:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:42:57,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049810924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:42:57,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:42:57,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 16:42:57,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84506215] [2022-11-25 16:42:57,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:42:57,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:42:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:42:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:42:57,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:42:57,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 581 transitions, 10654 flow. Second operand has 13 states, 13 states have (on average 141.23076923076923) internal successors, (1836), 13 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:57,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:42:57,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:42:57,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:42:59,704 INFO L130 PetriNetUnfolder]: 2226/4462 cut-off events. [2022-11-25 16:42:59,705 INFO L131 PetriNetUnfolder]: For 115583/115583 co-relation queries the response was YES. [2022-11-25 16:42:59,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37360 conditions, 4462 events. 2226/4462 cut-off events. For 115583/115583 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34202 event pairs, 438 based on Foata normal form. 10/4470 useless extension candidates. Maximal degree in co-relation 36383. Up to 1753 conditions per place. [2022-11-25 16:42:59,755 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 440 selfloop transitions, 215 changer transitions 7/662 dead transitions. [2022-11-25 16:42:59,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 662 transitions, 13049 flow [2022-11-25 16:42:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:42:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 16:42:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2600 transitions. [2022-11-25 16:42:59,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44858523119392685 [2022-11-25 16:42:59,760 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2600 transitions. [2022-11-25 16:42:59,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2600 transitions. [2022-11-25 16:42:59,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:42:59,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2600 transitions. [2022-11-25 16:42:59,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 144.44444444444446) internal successors, (2600), 18 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:59,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:59,773 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:59,773 INFO L175 Difference]: Start difference. First operand has 243 places, 581 transitions, 10654 flow. Second operand 18 states and 2600 transitions. [2022-11-25 16:42:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 662 transitions, 13049 flow [2022-11-25 16:43:00,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 662 transitions, 12906 flow, removed 51 selfloop flow, removed 2 redundant places. [2022-11-25 16:43:00,883 INFO L231 Difference]: Finished difference. Result has 263 places, 590 transitions, 11344 flow [2022-11-25 16:43:00,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=10515, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11344, PETRI_PLACES=263, PETRI_TRANSITIONS=590} [2022-11-25 16:43:00,885 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 241 predicate places. [2022-11-25 16:43:00,885 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 590 transitions, 11344 flow [2022-11-25 16:43:00,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.23076923076923) internal successors, (1836), 13 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:00,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:00,886 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:00,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:01,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 16:43:01,095 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1058667617, now seen corresponding path program 16 times [2022-11-25 16:43:01,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368918655] [2022-11-25 16:43:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:01,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368918655] [2022-11-25 16:43:01,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368918655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364016181] [2022-11-25 16:43:01,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:43:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:01,223 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:01,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 16:43:01,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:43:01,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:01,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:43:01,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:01,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364016181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:01,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:01,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 16:43:01,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817993965] [2022-11-25 16:43:01,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:43:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:43:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:43:01,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:43:01,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 590 transitions, 11344 flow. Second operand has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:01,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:01,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:43:01,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:04,071 INFO L130 PetriNetUnfolder]: 2367/4691 cut-off events. [2022-11-25 16:43:04,071 INFO L131 PetriNetUnfolder]: For 139088/139088 co-relation queries the response was YES. [2022-11-25 16:43:04,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41287 conditions, 4691 events. 2367/4691 cut-off events. For 139088/139088 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 35652 event pairs, 182 based on Foata normal form. 18/4707 useless extension candidates. Maximal degree in co-relation 40233. Up to 3859 conditions per place. [2022-11-25 16:43:04,124 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 541 selfloop transitions, 135 changer transitions 4/680 dead transitions. [2022-11-25 16:43:04,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 680 transitions, 14211 flow [2022-11-25 16:43:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:43:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:43:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1589 transitions. [2022-11-25 16:43:04,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44861660079051385 [2022-11-25 16:43:04,128 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1589 transitions. [2022-11-25 16:43:04,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1589 transitions. [2022-11-25 16:43:04,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:04,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1589 transitions. [2022-11-25 16:43:04,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.45454545454547) internal successors, (1589), 11 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:04,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:04,138 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:04,138 INFO L175 Difference]: Start difference. First operand has 263 places, 590 transitions, 11344 flow. Second operand 11 states and 1589 transitions. [2022-11-25 16:43:04,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 680 transitions, 14211 flow [2022-11-25 16:43:05,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 680 transitions, 13641 flow, removed 139 selfloop flow, removed 8 redundant places. [2022-11-25 16:43:05,689 INFO L231 Difference]: Finished difference. Result has 269 places, 640 transitions, 12072 flow [2022-11-25 16:43:05,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=10754, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12072, PETRI_PLACES=269, PETRI_TRANSITIONS=640} [2022-11-25 16:43:05,690 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 247 predicate places. [2022-11-25 16:43:05,690 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 640 transitions, 12072 flow [2022-11-25 16:43:05,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:05,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:05,691 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:05,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:05,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:05,895 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:05,895 INFO L85 PathProgramCache]: Analyzing trace with hash 467042764, now seen corresponding path program 17 times [2022-11-25 16:43:05,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:05,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420970359] [2022-11-25 16:43:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:05,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:06,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420970359] [2022-11-25 16:43:06,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420970359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012851431] [2022-11-25 16:43:06,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:43:06,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:06,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:06,036 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:06,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 16:43:06,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:43:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:06,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:43:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:06,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:06,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012851431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:06,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:06,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 16:43:06,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497126256] [2022-11-25 16:43:06,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:06,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:43:06,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:06,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:43:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:43:06,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:43:06,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 640 transitions, 12072 flow. Second operand has 11 states, 11 states have (on average 141.45454545454547) internal successors, (1556), 11 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:06,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:06,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:43:06,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:08,964 INFO L130 PetriNetUnfolder]: 2349/4657 cut-off events. [2022-11-25 16:43:08,965 INFO L131 PetriNetUnfolder]: For 139905/139905 co-relation queries the response was YES. [2022-11-25 16:43:08,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41599 conditions, 4657 events. 2349/4657 cut-off events. For 139905/139905 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35523 event pairs, 552 based on Foata normal form. 6/4661 useless extension candidates. Maximal degree in co-relation 40567. Up to 2031 conditions per place. [2022-11-25 16:43:09,012 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 514 selfloop transitions, 158 changer transitions 12/684 dead transitions. [2022-11-25 16:43:09,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 684 transitions, 13979 flow [2022-11-25 16:43:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:43:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:43:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1591 transitions. [2022-11-25 16:43:09,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4491812535290796 [2022-11-25 16:43:09,018 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1591 transitions. [2022-11-25 16:43:09,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1591 transitions. [2022-11-25 16:43:09,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:09,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1591 transitions. [2022-11-25 16:43:09,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.63636363636363) internal successors, (1591), 11 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:09,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:09,026 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:09,026 INFO L175 Difference]: Start difference. First operand has 269 places, 640 transitions, 12072 flow. Second operand 11 states and 1591 transitions. [2022-11-25 16:43:09,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 684 transitions, 13979 flow [2022-11-25 16:43:10,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 684 transitions, 13624 flow, removed 139 selfloop flow, removed 4 redundant places. [2022-11-25 16:43:10,337 INFO L231 Difference]: Finished difference. Result has 279 places, 640 transitions, 12149 flow [2022-11-25 16:43:10,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=11721, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12149, PETRI_PLACES=279, PETRI_TRANSITIONS=640} [2022-11-25 16:43:10,338 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 257 predicate places. [2022-11-25 16:43:10,338 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 640 transitions, 12149 flow [2022-11-25 16:43:10,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 141.45454545454547) internal successors, (1556), 11 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:10,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:10,339 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:10,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:10,540 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1875302808, now seen corresponding path program 18 times [2022-11-25 16:43:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:10,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324455338] [2022-11-25 16:43:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:10,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:10,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324455338] [2022-11-25 16:43:10,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324455338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:10,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788171785] [2022-11-25 16:43:10,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:43:10,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:10,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:10,662 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:10,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 16:43:10,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 16:43:10,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:10,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:43:10,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:10,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:11,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788171785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:11,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:11,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 16:43:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806343702] [2022-11-25 16:43:11,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:11,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:43:11,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:43:11,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:43:11,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:43:11,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 640 transitions, 12149 flow. Second operand has 12 states, 12 states have (on average 141.58333333333334) internal successors, (1699), 12 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:11,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:11,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:43:11,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:14,055 INFO L130 PetriNetUnfolder]: 2455/4863 cut-off events. [2022-11-25 16:43:14,055 INFO L131 PetriNetUnfolder]: For 160294/160294 co-relation queries the response was YES. [2022-11-25 16:43:14,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44871 conditions, 4863 events. 2455/4863 cut-off events. For 160294/160294 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 37350 event pairs, 582 based on Foata normal form. 36/4897 useless extension candidates. Maximal degree in co-relation 44165. Up to 2902 conditions per place. [2022-11-25 16:43:14,102 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 477 selfloop transitions, 254 changer transitions 3/734 dead transitions. [2022-11-25 16:43:14,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 734 transitions, 15341 flow [2022-11-25 16:43:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:43:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 16:43:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1905 transitions. [2022-11-25 16:43:14,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4550883898709986 [2022-11-25 16:43:14,105 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1905 transitions. [2022-11-25 16:43:14,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1905 transitions. [2022-11-25 16:43:14,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:14,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1905 transitions. [2022-11-25 16:43:14,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 146.53846153846155) internal successors, (1905), 13 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 322.0) internal successors, (4508), 14 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,113 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 322.0) internal successors, (4508), 14 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:14,113 INFO L175 Difference]: Start difference. First operand has 279 places, 640 transitions, 12149 flow. Second operand 13 states and 1905 transitions. [2022-11-25 16:43:14,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 734 transitions, 15341 flow [2022-11-25 16:43:15,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 734 transitions, 14921 flow, removed 46 selfloop flow, removed 12 redundant places. [2022-11-25 16:43:15,536 INFO L231 Difference]: Finished difference. Result has 282 places, 663 transitions, 13301 flow [2022-11-25 16:43:15,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=11767, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13301, PETRI_PLACES=282, PETRI_TRANSITIONS=663} [2022-11-25 16:43:15,537 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 260 predicate places. [2022-11-25 16:43:15,537 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 663 transitions, 13301 flow [2022-11-25 16:43:15,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.58333333333334) internal successors, (1699), 12 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:15,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:15,538 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:15,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:15,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-25 16:43:15,739 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1431018866, now seen corresponding path program 19 times [2022-11-25 16:43:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104916587] [2022-11-25 16:43:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:15,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:15,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104916587] [2022-11-25 16:43:15,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104916587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:15,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385595049] [2022-11-25 16:43:15,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:43:15,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:15,881 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:15,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 16:43:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:16,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:43:16,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:16,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:16,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385595049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:16,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:16,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 16:43:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861733888] [2022-11-25 16:43:16,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:16,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:43:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:43:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:43:16,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:43:16,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 663 transitions, 13301 flow. Second operand has 12 states, 12 states have (on average 141.33333333333334) internal successors, (1696), 12 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:16,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:16,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:43:16,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:18,938 INFO L130 PetriNetUnfolder]: 2445/4840 cut-off events. [2022-11-25 16:43:18,938 INFO L131 PetriNetUnfolder]: For 152788/152788 co-relation queries the response was YES. [2022-11-25 16:43:18,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44865 conditions, 4840 events. 2445/4840 cut-off events. For 152788/152788 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37147 event pairs, 419 based on Foata normal form. 18/4856 useless extension candidates. Maximal degree in co-relation 44055. Up to 1754 conditions per place. [2022-11-25 16:43:18,999 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 465 selfloop transitions, 266 changer transitions 2/733 dead transitions. [2022-11-25 16:43:19,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 733 transitions, 15771 flow [2022-11-25 16:43:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:43:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 16:43:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2605 transitions. [2022-11-25 16:43:19,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.449447895100069 [2022-11-25 16:43:19,005 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2605 transitions. [2022-11-25 16:43:19,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2605 transitions. [2022-11-25 16:43:19,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:19,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2605 transitions. [2022-11-25 16:43:19,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 144.72222222222223) internal successors, (2605), 18 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:19,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:19,018 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:19,018 INFO L175 Difference]: Start difference. First operand has 282 places, 663 transitions, 13301 flow. Second operand 18 states and 2605 transitions. [2022-11-25 16:43:19,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 733 transitions, 15771 flow [2022-11-25 16:43:20,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 733 transitions, 15228 flow, removed 138 selfloop flow, removed 10 redundant places. [2022-11-25 16:43:20,611 INFO L231 Difference]: Finished difference. Result has 291 places, 666 transitions, 13732 flow [2022-11-25 16:43:20,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=12737, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13732, PETRI_PLACES=291, PETRI_TRANSITIONS=666} [2022-11-25 16:43:20,613 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 269 predicate places. [2022-11-25 16:43:20,613 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 666 transitions, 13732 flow [2022-11-25 16:43:20,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.33333333333334) internal successors, (1696), 12 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:20,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:20,614 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:20,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:20,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:20,821 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash -827124109, now seen corresponding path program 20 times [2022-11-25 16:43:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:20,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597409486] [2022-11-25 16:43:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:20,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:20,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:20,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597409486] [2022-11-25 16:43:20,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597409486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:20,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846138577] [2022-11-25 16:43:20,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:43:20,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:20,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:20,947 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:20,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 16:43:21,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:43:21,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:43:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:21,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:21,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846138577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:21,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:21,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 16:43:21,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059615684] [2022-11-25 16:43:21,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:21,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:43:21,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:43:21,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:43:21,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:43:21,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 666 transitions, 13732 flow. Second operand has 13 states, 13 states have (on average 141.6153846153846) internal successors, (1841), 13 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:21,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:21,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:43:21,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:24,345 INFO L130 PetriNetUnfolder]: 2418/4915 cut-off events. [2022-11-25 16:43:24,345 INFO L131 PetriNetUnfolder]: For 169428/169428 co-relation queries the response was YES. [2022-11-25 16:43:24,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46281 conditions, 4915 events. 2418/4915 cut-off events. For 169428/169428 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 38756 event pairs, 457 based on Foata normal form. 28/4941 useless extension candidates. Maximal degree in co-relation 45551. Up to 2462 conditions per place. [2022-11-25 16:43:24,400 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 586 selfloop transitions, 226 changer transitions 61/873 dead transitions. [2022-11-25 16:43:24,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 873 transitions, 19128 flow [2022-11-25 16:43:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 16:43:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 16:43:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2443 transitions. [2022-11-25 16:43:24,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462915601023018 [2022-11-25 16:43:24,405 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2443 transitions. [2022-11-25 16:43:24,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2443 transitions. [2022-11-25 16:43:24,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:24,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2443 transitions. [2022-11-25 16:43:24,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 143.7058823529412) internal successors, (2443), 17 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:24,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 322.0) internal successors, (5796), 18 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:24,416 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 322.0) internal successors, (5796), 18 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:24,416 INFO L175 Difference]: Start difference. First operand has 291 places, 666 transitions, 13732 flow. Second operand 17 states and 2443 transitions. [2022-11-25 16:43:24,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 873 transitions, 19128 flow [2022-11-25 16:43:26,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 873 transitions, 18456 flow, removed 218 selfloop flow, removed 12 redundant places. [2022-11-25 16:43:26,380 INFO L231 Difference]: Finished difference. Result has 299 places, 756 transitions, 15786 flow [2022-11-25 16:43:26,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=12949, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=15786, PETRI_PLACES=299, PETRI_TRANSITIONS=756} [2022-11-25 16:43:26,381 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 277 predicate places. [2022-11-25 16:43:26,381 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 756 transitions, 15786 flow [2022-11-25 16:43:26,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.6153846153846) internal successors, (1841), 13 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:26,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:26,382 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:26,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:26,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:26,597 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1528349329, now seen corresponding path program 21 times [2022-11-25 16:43:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:26,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798836766] [2022-11-25 16:43:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:26,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:26,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:26,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798836766] [2022-11-25 16:43:26,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798836766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:26,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083461666] [2022-11-25 16:43:26,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:43:26,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:26,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:26,732 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:26,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 16:43:27,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 16:43:27,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:43:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:27,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:27,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083461666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:27,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:27,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 16:43:27,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75162763] [2022-11-25 16:43:27,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:27,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:43:27,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:27,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:43:27,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:43:27,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:43:27,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 756 transitions, 15786 flow. Second operand has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:27,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:27,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:43:27,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:29,951 INFO L130 PetriNetUnfolder]: 2257/4616 cut-off events. [2022-11-25 16:43:29,951 INFO L131 PetriNetUnfolder]: For 157349/157349 co-relation queries the response was YES. [2022-11-25 16:43:29,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44558 conditions, 4616 events. 2257/4616 cut-off events. For 157349/157349 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36312 event pairs, 54 based on Foata normal form. 28/4642 useless extension candidates. Maximal degree in co-relation 43822. Up to 1913 conditions per place. [2022-11-25 16:43:30,001 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 522 selfloop transitions, 312 changer transitions 10/844 dead transitions. [2022-11-25 16:43:30,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 844 transitions, 19019 flow [2022-11-25 16:43:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 16:43:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 16:43:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3015 transitions. [2022-11-25 16:43:30,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4458740017746229 [2022-11-25 16:43:30,007 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3015 transitions. [2022-11-25 16:43:30,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3015 transitions. [2022-11-25 16:43:30,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:30,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3015 transitions. [2022-11-25 16:43:30,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 143.57142857142858) internal successors, (3015), 21 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:30,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 322.0) internal successors, (7084), 22 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:30,021 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 322.0) internal successors, (7084), 22 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:30,021 INFO L175 Difference]: Start difference. First operand has 299 places, 756 transitions, 15786 flow. Second operand 21 states and 3015 transitions. [2022-11-25 16:43:30,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 844 transitions, 19019 flow [2022-11-25 16:43:32,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 844 transitions, 18217 flow, removed 375 selfloop flow, removed 2 redundant places. [2022-11-25 16:43:32,146 INFO L231 Difference]: Finished difference. Result has 321 places, 774 transitions, 16361 flow [2022-11-25 16:43:32,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=14805, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16361, PETRI_PLACES=321, PETRI_TRANSITIONS=774} [2022-11-25 16:43:32,149 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 299 predicate places. [2022-11-25 16:43:32,149 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 774 transitions, 16361 flow [2022-11-25 16:43:32,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.3846153846154) internal successors, (1838), 13 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:32,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:32,150 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:32,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:32,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 16:43:32,357 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:32,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1996829883, now seen corresponding path program 22 times [2022-11-25 16:43:32,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:32,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147697407] [2022-11-25 16:43:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:32,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:32,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147697407] [2022-11-25 16:43:32,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147697407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656132117] [2022-11-25 16:43:32,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:43:32,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:32,479 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:32,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 16:43:32,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:43:32,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:43:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:32,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:32,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656132117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:32,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:32,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 16:43:32,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667107306] [2022-11-25 16:43:32,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:32,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:43:32,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:43:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:43:32,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:43:32,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 774 transitions, 16361 flow. Second operand has 12 states, 12 states have (on average 141.41666666666666) internal successors, (1697), 12 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:32,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:32,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:43:32,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:35,874 INFO L130 PetriNetUnfolder]: 2365/4839 cut-off events. [2022-11-25 16:43:35,875 INFO L131 PetriNetUnfolder]: For 176480/176480 co-relation queries the response was YES. [2022-11-25 16:43:35,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47808 conditions, 4839 events. 2365/4839 cut-off events. For 176480/176480 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 38246 event pairs, 126 based on Foata normal form. 52/4889 useless extension candidates. Maximal degree in co-relation 47221. Up to 3001 conditions per place. [2022-11-25 16:43:35,928 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 552 selfloop transitions, 324 changer transitions 2/878 dead transitions. [2022-11-25 16:43:35,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 878 transitions, 20296 flow [2022-11-25 16:43:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 16:43:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 16:43:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2034 transitions. [2022-11-25 16:43:35,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45119787045252885 [2022-11-25 16:43:35,932 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2034 transitions. [2022-11-25 16:43:35,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2034 transitions. [2022-11-25 16:43:35,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:35,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2034 transitions. [2022-11-25 16:43:35,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 145.28571428571428) internal successors, (2034), 14 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:35,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 322.0) internal successors, (4830), 15 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:35,940 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 322.0) internal successors, (4830), 15 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:35,940 INFO L175 Difference]: Start difference. First operand has 321 places, 774 transitions, 16361 flow. Second operand 14 states and 2034 transitions. [2022-11-25 16:43:35,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 878 transitions, 20296 flow [2022-11-25 16:43:38,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 878 transitions, 19636 flow, removed 293 selfloop flow, removed 4 redundant places. [2022-11-25 16:43:38,312 INFO L231 Difference]: Finished difference. Result has 333 places, 807 transitions, 17725 flow [2022-11-25 16:43:38,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=15680, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17725, PETRI_PLACES=333, PETRI_TRANSITIONS=807} [2022-11-25 16:43:38,313 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 311 predicate places. [2022-11-25 16:43:38,314 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 807 transitions, 17725 flow [2022-11-25 16:43:38,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.41666666666666) internal successors, (1697), 12 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:38,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:38,314 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:38,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:38,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 16:43:38,521 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1641017067, now seen corresponding path program 23 times [2022-11-25 16:43:38,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:38,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452569094] [2022-11-25 16:43:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:38,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:38,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:38,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452569094] [2022-11-25 16:43:38,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452569094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:38,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676257263] [2022-11-25 16:43:38,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:43:38,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:38,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:38,663 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:38,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 16:43:38,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 16:43:38,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:43:38,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:38,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:38,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676257263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:38,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:38,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 16:43:38,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219490773] [2022-11-25 16:43:38,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:38,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:43:38,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:43:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:43:39,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:43:39,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 807 transitions, 17725 flow. Second operand has 12 states, 12 states have (on average 141.5) internal successors, (1698), 12 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:39,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:39,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:43:39,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:42,476 INFO L130 PetriNetUnfolder]: 2283/4668 cut-off events. [2022-11-25 16:43:42,476 INFO L131 PetriNetUnfolder]: For 156687/156687 co-relation queries the response was YES. [2022-11-25 16:43:42,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45674 conditions, 4668 events. 2283/4668 cut-off events. For 156687/156687 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36662 event pairs, 50 based on Foata normal form. 28/4694 useless extension candidates. Maximal degree in co-relation 45063. Up to 1769 conditions per place. [2022-11-25 16:43:42,536 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 509 selfloop transitions, 363 changer transitions 7/879 dead transitions. [2022-11-25 16:43:42,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 879 transitions, 20834 flow [2022-11-25 16:43:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 16:43:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 16:43:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2731 transitions. [2022-11-25 16:43:42,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4463877084014384 [2022-11-25 16:43:42,540 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2731 transitions. [2022-11-25 16:43:42,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2731 transitions. [2022-11-25 16:43:42,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:42,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2731 transitions. [2022-11-25 16:43:42,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 143.73684210526315) internal successors, (2731), 19 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:42,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 322.0) internal successors, (6440), 20 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:42,550 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 322.0) internal successors, (6440), 20 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:42,550 INFO L175 Difference]: Start difference. First operand has 333 places, 807 transitions, 17725 flow. Second operand 19 states and 2731 transitions. [2022-11-25 16:43:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 879 transitions, 20834 flow [2022-11-25 16:43:44,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 879 transitions, 20323 flow, removed 160 selfloop flow, removed 9 redundant places. [2022-11-25 16:43:44,443 INFO L231 Difference]: Finished difference. Result has 345 places, 809 transitions, 18384 flow [2022-11-25 16:43:44,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=17000, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=18384, PETRI_PLACES=345, PETRI_TRANSITIONS=809} [2022-11-25 16:43:44,444 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 323 predicate places. [2022-11-25 16:43:44,444 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 809 transitions, 18384 flow [2022-11-25 16:43:44,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.5) internal successors, (1698), 12 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:44,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:43:44,445 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:44,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:44,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 16:43:44,645 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:43:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash -239827185, now seen corresponding path program 24 times [2022-11-25 16:43:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:44,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292411027] [2022-11-25 16:43:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:44,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:46,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292411027] [2022-11-25 16:43:46,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292411027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162469753] [2022-11-25 16:43:46,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:43:46,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:46,246 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:46,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 16:43:46,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 16:43:46,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:43:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 16:43:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:46,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:43:46,694 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-25 16:43:46,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 16:43:46,705 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 19 treesize of output 15 [2022-11-25 16:43:46,750 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 [2022-11-25 16:43:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:43:46,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:43:46,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:43:46,846 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2022-11-25 16:43:46,856 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 13 treesize of output 7 [2022-11-25 16:43:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:43:46,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162469753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:43:46,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:43:46,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2022-11-25 16:43:46,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822358717] [2022-11-25 16:43:46,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:43:46,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 16:43:46,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:46,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 16:43:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=385, Unknown=2, NotChecked=0, Total=462 [2022-11-25 16:43:49,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:43:50,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 322 [2022-11-25 16:43:50,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 809 transitions, 18384 flow. Second operand has 22 states, 22 states have (on average 98.95454545454545) internal successors, (2177), 22 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:50,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:43:50,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 322 [2022-11-25 16:43:50,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:43:53,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:43:55,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:43:58,667 INFO L130 PetriNetUnfolder]: 2376/4854 cut-off events. [2022-11-25 16:43:58,667 INFO L131 PetriNetUnfolder]: For 169062/169111 co-relation queries the response was YES. [2022-11-25 16:43:58,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49610 conditions, 4854 events. 2376/4854 cut-off events. For 169062/169111 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 38490 event pairs, 94 based on Foata normal form. 33/4863 useless extension candidates. Maximal degree in co-relation 48976. Up to 4080 conditions per place. [2022-11-25 16:43:58,772 INFO L137 encePairwiseOnDemand]: 313/322 looper letters, 757 selfloop transitions, 151 changer transitions 21/938 dead transitions. [2022-11-25 16:43:58,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 938 transitions, 22427 flow [2022-11-25 16:43:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:43:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 16:43:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1836 transitions. [2022-11-25 16:43:58,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3167701863354037 [2022-11-25 16:43:58,777 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1836 transitions. [2022-11-25 16:43:58,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1836 transitions. [2022-11-25 16:43:58,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:43:58,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1836 transitions. [2022-11-25 16:43:58,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.0) internal successors, (1836), 18 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:58,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:58,787 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:58,787 INFO L175 Difference]: Start difference. First operand has 345 places, 809 transitions, 18384 flow. Second operand 18 states and 1836 transitions. [2022-11-25 16:43:58,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 938 transitions, 22427 flow [2022-11-25 16:44:01,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 938 transitions, 21760 flow, removed 183 selfloop flow, removed 10 redundant places. [2022-11-25 16:44:01,350 INFO L231 Difference]: Finished difference. Result has 356 places, 867 transitions, 19371 flow [2022-11-25 16:44:01,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=17735, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=19371, PETRI_PLACES=356, PETRI_TRANSITIONS=867} [2022-11-25 16:44:01,352 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 334 predicate places. [2022-11-25 16:44:01,352 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 867 transitions, 19371 flow [2022-11-25 16:44:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.95454545454545) internal successors, (2177), 22 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:01,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:01,353 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:01,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:01,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:01,559 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:44:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:01,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2011396798, now seen corresponding path program 25 times [2022-11-25 16:44:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:01,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596046045] [2022-11-25 16:44:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:01,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:44:02,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596046045] [2022-11-25 16:44:02,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596046045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072019368] [2022-11-25 16:44:02,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:44:02,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:02,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:02,408 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:02,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 16:44:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 16:44:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:02,932 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2022-11-25 16:44:02,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 51 [2022-11-25 16:44:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:44:02,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:03,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:44:03,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 70 [2022-11-25 16:44:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:44:03,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072019368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:03,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:44:03,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-25 16:44:03,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033677539] [2022-11-25 16:44:03,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:03,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 16:44:03,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:03,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 16:44:03,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:44:06,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:44:08,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:44:09,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 322 [2022-11-25 16:44:09,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 867 transitions, 19371 flow. Second operand has 17 states, 17 states have (on average 126.23529411764706) internal successors, (2146), 17 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:09,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:44:09,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 322 [2022-11-25 16:44:09,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:44:13,149 INFO L130 PetriNetUnfolder]: 2378/4834 cut-off events. [2022-11-25 16:44:13,150 INFO L131 PetriNetUnfolder]: For 159597/159642 co-relation queries the response was YES. [2022-11-25 16:44:13,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48742 conditions, 4834 events. 2378/4834 cut-off events. For 159597/159642 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 38189 event pairs, 172 based on Foata normal form. 50/4856 useless extension candidates. Maximal degree in co-relation 48111. Up to 2941 conditions per place. [2022-11-25 16:44:13,237 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 515 selfloop transitions, 78 changer transitions 381/983 dead transitions. [2022-11-25 16:44:13,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 983 transitions, 23268 flow [2022-11-25 16:44:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:44:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 16:44:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1306 transitions. [2022-11-25 16:44:13,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40559006211180126 [2022-11-25 16:44:13,242 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1306 transitions. [2022-11-25 16:44:13,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1306 transitions. [2022-11-25 16:44:13,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:44:13,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1306 transitions. [2022-11-25 16:44:13,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.6) internal successors, (1306), 10 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:13,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 322.0) internal successors, (3542), 11 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:13,252 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 322.0) internal successors, (3542), 11 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:13,252 INFO L175 Difference]: Start difference. First operand has 356 places, 867 transitions, 19371 flow. Second operand 10 states and 1306 transitions. [2022-11-25 16:44:13,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 983 transitions, 23268 flow [2022-11-25 16:44:15,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 983 transitions, 23004 flow, removed 112 selfloop flow, removed 4 redundant places. [2022-11-25 16:44:15,620 INFO L231 Difference]: Finished difference. Result has 363 places, 596 transitions, 13295 flow [2022-11-25 16:44:15,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=19125, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13295, PETRI_PLACES=363, PETRI_TRANSITIONS=596} [2022-11-25 16:44:15,621 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 341 predicate places. [2022-11-25 16:44:15,621 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 596 transitions, 13295 flow [2022-11-25 16:44:15,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 126.23529411764706) internal successors, (2146), 17 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:15,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:44:15,622 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:15,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:15,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 16:44:15,823 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:44:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1013236072, now seen corresponding path program 26 times [2022-11-25 16:44:15,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:15,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649067836] [2022-11-25 16:44:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:15,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:44:16,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649067836] [2022-11-25 16:44:16,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649067836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:44:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589378873] [2022-11-25 16:44:16,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:44:16,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:16,667 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:16,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 16:44:16,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:44:16,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:44:16,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 16:44:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:17,033 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 11 treesize of output 7 [2022-11-25 16:44:17,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:44:17,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:44:17,401 INFO L321 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-11-25 16:44:17,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 27 [2022-11-25 16:44:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:44:17,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:22,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:44:22,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 286 treesize of output 178 [2022-11-25 16:44:22,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:44:22,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1516 treesize of output 1448 [2022-11-25 16:44:22,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:44:22,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1330 treesize of output 1138 [2022-11-25 16:44:23,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:44:23,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1047 treesize of output 1029 [2022-11-25 16:48:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:48:31,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589378873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:48:31,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:48:31,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-11-25 16:48:31,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776523195] [2022-11-25 16:48:31,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:48:31,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 16:48:31,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:48:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 16:48:31,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=295, Unknown=7, NotChecked=0, Total=380 [2022-11-25 16:48:32,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:48:33,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:48:37,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:48:43,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:48:46,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 16:48:48,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 322 [2022-11-25 16:48:48,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 596 transitions, 13295 flow. Second operand has 20 states, 20 states have (on average 102.25) internal successors, (2045), 20 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:48,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:48:48,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 322 [2022-11-25 16:48:48,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:48:50,618 INFO L130 PetriNetUnfolder]: 1583/3122 cut-off events. [2022-11-25 16:48:50,618 INFO L131 PetriNetUnfolder]: For 104668/104694 co-relation queries the response was YES. [2022-11-25 16:48:50,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31941 conditions, 3122 events. 1583/3122 cut-off events. For 104668/104694 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 22094 event pairs, 119 based on Foata normal form. 24/3132 useless extension candidates. Maximal degree in co-relation 31787. Up to 1861 conditions per place. [2022-11-25 16:48:50,659 INFO L137 encePairwiseOnDemand]: 314/322 looper letters, 398 selfloop transitions, 63 changer transitions 221/691 dead transitions. [2022-11-25 16:48:50,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 691 transitions, 16358 flow [2022-11-25 16:48:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:48:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:48:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1159 transitions. [2022-11-25 16:48:50,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3272162619988707 [2022-11-25 16:48:50,662 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1159 transitions. [2022-11-25 16:48:50,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1159 transitions. [2022-11-25 16:48:50,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:48:50,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1159 transitions. [2022-11-25 16:48:50,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.36363636363636) internal successors, (1159), 11 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:50,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:50,668 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:50,668 INFO L175 Difference]: Start difference. First operand has 363 places, 596 transitions, 13295 flow. Second operand 11 states and 1159 transitions. [2022-11-25 16:48:50,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 691 transitions, 16358 flow [2022-11-25 16:48:51,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 691 transitions, 15407 flow, removed 361 selfloop flow, removed 11 redundant places. [2022-11-25 16:48:52,006 INFO L231 Difference]: Finished difference. Result has 357 places, 450 transitions, 9403 flow [2022-11-25 16:48:52,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=12434, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9403, PETRI_PLACES=357, PETRI_TRANSITIONS=450} [2022-11-25 16:48:52,007 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 335 predicate places. [2022-11-25 16:48:52,007 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 450 transitions, 9403 flow [2022-11-25 16:48:52,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 102.25) internal successors, (2045), 20 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:52,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:48:52,008 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:48:52,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 16:48:52,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 16:48:52,209 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:48:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:48:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1919566699, now seen corresponding path program 27 times [2022-11-25 16:48:52,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:48:52,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801360981] [2022-11-25 16:48:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:52,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:48:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:52,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:48:52,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801360981] [2022-11-25 16:48:52,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801360981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:48:52,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330837126] [2022-11-25 16:48:52,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:48:52,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:48:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:48:52,337 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:48:52,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 16:48:52,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 16:48:52,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:48:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:48:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:48:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:52,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:48:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:52,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330837126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:48:52,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:48:52,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 16:48:52,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746818425] [2022-11-25 16:48:52,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:48:52,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:48:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:48:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:48:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:48:52,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:48:52,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 450 transitions, 9403 flow. Second operand has 13 states, 13 states have (on average 141.53846153846155) internal successors, (1840), 13 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:52,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:48:52,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:48:52,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:48:54,268 INFO L130 PetriNetUnfolder]: 1314/2604 cut-off events. [2022-11-25 16:48:54,268 INFO L131 PetriNetUnfolder]: For 93828/93828 co-relation queries the response was YES. [2022-11-25 16:48:54,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25929 conditions, 2604 events. 1314/2604 cut-off events. For 93828/93828 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 17801 event pairs, 389 based on Foata normal form. 12/2615 useless extension candidates. Maximal degree in co-relation 25804. Up to 1952 conditions per place. [2022-11-25 16:48:54,306 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 446 selfloop transitions, 111 changer transitions 7/564 dead transitions. [2022-11-25 16:48:54,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 564 transitions, 12758 flow [2022-11-25 16:48:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:48:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 16:48:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1754 transitions. [2022-11-25 16:48:54,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45393374741200826 [2022-11-25 16:48:54,309 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1754 transitions. [2022-11-25 16:48:54,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1754 transitions. [2022-11-25 16:48:54,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:48:54,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1754 transitions. [2022-11-25 16:48:54,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 146.16666666666666) internal successors, (1754), 12 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:54,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 322.0) internal successors, (4186), 13 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:54,316 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 322.0) internal successors, (4186), 13 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:54,316 INFO L175 Difference]: Start difference. First operand has 357 places, 450 transitions, 9403 flow. Second operand 12 states and 1754 transitions. [2022-11-25 16:48:54,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 564 transitions, 12758 flow [2022-11-25 16:48:55,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 564 transitions, 11896 flow, removed 200 selfloop flow, removed 18 redundant places. [2022-11-25 16:48:55,066 INFO L231 Difference]: Finished difference. Result has 343 places, 492 transitions, 10163 flow [2022-11-25 16:48:55,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=8688, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10163, PETRI_PLACES=343, PETRI_TRANSITIONS=492} [2022-11-25 16:48:55,067 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 321 predicate places. [2022-11-25 16:48:55,067 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 492 transitions, 10163 flow [2022-11-25 16:48:55,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.53846153846155) internal successors, (1840), 13 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:55,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:48:55,068 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:48:55,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 16:48:55,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 16:48:55,268 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:48:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:48:55,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1096556938, now seen corresponding path program 28 times [2022-11-25 16:48:55,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:48:55,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613612158] [2022-11-25 16:48:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:55,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:48:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:55,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:48:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613612158] [2022-11-25 16:48:55,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613612158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:48:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640033428] [2022-11-25 16:48:55,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:48:55,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:48:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:48:55,390 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:48:55,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 16:48:55,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:48:55,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:48:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:48:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:48:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:55,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:48:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:55,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640033428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:48:55,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:48:55,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 16:48:55,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957534589] [2022-11-25 16:48:55,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:48:55,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:48:55,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:48:55,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:48:55,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:48:55,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:48:55,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 492 transitions, 10163 flow. Second operand has 11 states, 11 states have (on average 141.8181818181818) internal successors, (1560), 11 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:55,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:48:55,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:48:55,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:48:57,373 INFO L130 PetriNetUnfolder]: 1395/2757 cut-off events. [2022-11-25 16:48:57,374 INFO L131 PetriNetUnfolder]: For 95282/95282 co-relation queries the response was YES. [2022-11-25 16:48:57,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26986 conditions, 2757 events. 1395/2757 cut-off events. For 95282/95282 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 19052 event pairs, 133 based on Foata normal form. 10/2766 useless extension candidates. Maximal degree in co-relation 26866. Up to 1937 conditions per place. [2022-11-25 16:48:57,407 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 425 selfloop transitions, 131 changer transitions 4/560 dead transitions. [2022-11-25 16:48:57,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 560 transitions, 12528 flow [2022-11-25 16:48:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:48:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 16:48:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1030 transitions. [2022-11-25 16:48:57,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4569653948535936 [2022-11-25 16:48:57,409 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1030 transitions. [2022-11-25 16:48:57,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1030 transitions. [2022-11-25 16:48:57,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:48:57,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1030 transitions. [2022-11-25 16:48:57,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.14285714285714) internal successors, (1030), 7 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:57,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:57,411 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 322.0) internal successors, (2576), 8 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:57,411 INFO L175 Difference]: Start difference. First operand has 343 places, 492 transitions, 10163 flow. Second operand 7 states and 1030 transitions. [2022-11-25 16:48:57,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 560 transitions, 12528 flow [2022-11-25 16:48:58,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 560 transitions, 12217 flow, removed 130 selfloop flow, removed 7 redundant places. [2022-11-25 16:48:58,191 INFO L231 Difference]: Finished difference. Result has 346 places, 507 transitions, 10834 flow [2022-11-25 16:48:58,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=9864, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10834, PETRI_PLACES=346, PETRI_TRANSITIONS=507} [2022-11-25 16:48:58,192 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 324 predicate places. [2022-11-25 16:48:58,192 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 507 transitions, 10834 flow [2022-11-25 16:48:58,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 141.8181818181818) internal successors, (1560), 11 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:58,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:48:58,193 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:48:58,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 16:48:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-25 16:48:58,397 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:48:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:48:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash 261995235, now seen corresponding path program 29 times [2022-11-25 16:48:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:48:58,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386031424] [2022-11-25 16:48:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:48:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:48:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:48:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:48:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386031424] [2022-11-25 16:48:58,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386031424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:48:58,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419121980] [2022-11-25 16:48:58,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:48:58,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:48:58,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:48:58,518 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:48:58,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 16:48:58,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 16:48:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:48:58,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:48:58,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:48:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:58,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:48:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:48:58,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419121980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:48:58,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:48:58,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 16:48:58,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171154665] [2022-11-25 16:48:58,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:48:58,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:48:58,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:48:58,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:48:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:48:58,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:48:58,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 507 transitions, 10834 flow. Second operand has 12 states, 12 states have (on average 141.41666666666666) internal successors, (1697), 12 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:48:58,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:48:58,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:48:58,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:49:00,906 INFO L130 PetriNetUnfolder]: 1432/2832 cut-off events. [2022-11-25 16:49:00,906 INFO L131 PetriNetUnfolder]: For 103144/103144 co-relation queries the response was YES. [2022-11-25 16:49:00,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28181 conditions, 2832 events. 1432/2832 cut-off events. For 103144/103144 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19738 event pairs, 282 based on Foata normal form. 8/2839 useless extension candidates. Maximal degree in co-relation 28058. Up to 1518 conditions per place. [2022-11-25 16:49:00,941 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 385 selfloop transitions, 222 changer transitions 2/609 dead transitions. [2022-11-25 16:49:00,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 609 transitions, 13912 flow [2022-11-25 16:49:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:49:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 16:49:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1903 transitions. [2022-11-25 16:49:00,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4546106067845198 [2022-11-25 16:49:00,944 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1903 transitions. [2022-11-25 16:49:00,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1903 transitions. [2022-11-25 16:49:00,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:49:00,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1903 transitions. [2022-11-25 16:49:00,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 146.3846153846154) internal successors, (1903), 13 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:00,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 322.0) internal successors, (4508), 14 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:00,949 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 322.0) internal successors, (4508), 14 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:00,949 INFO L175 Difference]: Start difference. First operand has 346 places, 507 transitions, 10834 flow. Second operand 13 states and 1903 transitions. [2022-11-25 16:49:00,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 609 transitions, 13912 flow [2022-11-25 16:49:01,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 609 transitions, 13722 flow, removed 37 selfloop flow, removed 5 redundant places. [2022-11-25 16:49:01,767 INFO L231 Difference]: Finished difference. Result has 349 places, 520 transitions, 11812 flow [2022-11-25 16:49:01,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=10683, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11812, PETRI_PLACES=349, PETRI_TRANSITIONS=520} [2022-11-25 16:49:01,769 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 327 predicate places. [2022-11-25 16:49:01,769 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 520 transitions, 11812 flow [2022-11-25 16:49:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.41666666666666) internal successors, (1697), 12 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:01,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:49:01,770 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:49:01,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 16:49:01,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:01,976 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:49:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:49:01,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1056505253, now seen corresponding path program 30 times [2022-11-25 16:49:01,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:49:01,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437912543] [2022-11-25 16:49:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:01,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:49:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:02,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:02,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437912543] [2022-11-25 16:49:02,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437912543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:02,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677100869] [2022-11-25 16:49:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:49:02,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:02,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:02,107 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:02,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 16:49:02,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 16:49:02,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:49:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:49:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:02,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:02,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677100869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:49:02,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:49:02,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 16:49:02,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532281077] [2022-11-25 16:49:02,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:02,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:49:02,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:02,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:49:02,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:49:02,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:49:02,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 520 transitions, 11812 flow. Second operand has 11 states, 11 states have (on average 141.45454545454547) internal successors, (1556), 11 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:02,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:49:02,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:49:02,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:49:04,317 INFO L130 PetriNetUnfolder]: 1439/2859 cut-off events. [2022-11-25 16:49:04,317 INFO L131 PetriNetUnfolder]: For 109816/109816 co-relation queries the response was YES. [2022-11-25 16:49:04,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29320 conditions, 2859 events. 1439/2859 cut-off events. For 109816/109816 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19926 event pairs, 243 based on Foata normal form. 8/2866 useless extension candidates. Maximal degree in co-relation 29195. Up to 1304 conditions per place. [2022-11-25 16:49:04,352 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 411 selfloop transitions, 160 changer transitions 13/584 dead transitions. [2022-11-25 16:49:04,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 584 transitions, 14070 flow [2022-11-25 16:49:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:49:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 16:49:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1595 transitions. [2022-11-25 16:49:04,354 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4503105590062112 [2022-11-25 16:49:04,354 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1595 transitions. [2022-11-25 16:49:04,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1595 transitions. [2022-11-25 16:49:04,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:49:04,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1595 transitions. [2022-11-25 16:49:04,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 145.0) internal successors, (1595), 11 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:04,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:04,358 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 322.0) internal successors, (3864), 12 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:04,358 INFO L175 Difference]: Start difference. First operand has 349 places, 520 transitions, 11812 flow. Second operand 11 states and 1595 transitions. [2022-11-25 16:49:04,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 584 transitions, 14070 flow [2022-11-25 16:49:05,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 584 transitions, 13562 flow, removed 112 selfloop flow, removed 9 redundant places. [2022-11-25 16:49:05,288 INFO L231 Difference]: Finished difference. Result has 354 places, 530 transitions, 12115 flow [2022-11-25 16:49:05,289 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=11342, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12115, PETRI_PLACES=354, PETRI_TRANSITIONS=530} [2022-11-25 16:49:05,290 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 332 predicate places. [2022-11-25 16:49:05,290 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 530 transitions, 12115 flow [2022-11-25 16:49:05,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 141.45454545454547) internal successors, (1556), 11 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:05,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:49:05,291 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:49:05,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 16:49:05,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-25 16:49:05,491 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:49:05,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:49:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1584908153, now seen corresponding path program 31 times [2022-11-25 16:49:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:49:05,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736091742] [2022-11-25 16:49:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:05,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:49:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:05,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736091742] [2022-11-25 16:49:05,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736091742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303560533] [2022-11-25 16:49:05,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:49:05,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:05,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:05,623 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:05,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 16:49:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:05,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:49:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:05,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:05,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303560533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:49:05,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:49:05,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 16:49:05,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804785369] [2022-11-25 16:49:05,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:05,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:49:05,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:49:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:49:06,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:49:06,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 530 transitions, 12115 flow. Second operand has 13 states, 13 states have (on average 141.46153846153845) internal successors, (1839), 13 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:06,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:49:06,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:49:06,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:49:07,631 INFO L130 PetriNetUnfolder]: 1394/2784 cut-off events. [2022-11-25 16:49:07,631 INFO L131 PetriNetUnfolder]: For 107772/107772 co-relation queries the response was YES. [2022-11-25 16:49:07,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29082 conditions, 2784 events. 1394/2784 cut-off events. For 107772/107772 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19396 event pairs, 238 based on Foata normal form. 20/2803 useless extension candidates. Maximal degree in co-relation 28956. Up to 1304 conditions per place. [2022-11-25 16:49:07,667 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 390 selfloop transitions, 194 changer transitions 9/593 dead transitions. [2022-11-25 16:49:07,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 593 transitions, 14058 flow [2022-11-25 16:49:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 16:49:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 16:49:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2456 transitions. [2022-11-25 16:49:07,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44866642309097554 [2022-11-25 16:49:07,671 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2456 transitions. [2022-11-25 16:49:07,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2456 transitions. [2022-11-25 16:49:07,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:49:07,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2456 transitions. [2022-11-25 16:49:07,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 144.47058823529412) internal successors, (2456), 17 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:07,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 322.0) internal successors, (5796), 18 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:07,676 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 322.0) internal successors, (5796), 18 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:07,676 INFO L175 Difference]: Start difference. First operand has 354 places, 530 transitions, 12115 flow. Second operand 17 states and 2456 transitions. [2022-11-25 16:49:07,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 593 transitions, 14058 flow [2022-11-25 16:49:08,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 593 transitions, 13765 flow, removed 125 selfloop flow, removed 4 redundant places. [2022-11-25 16:49:08,531 INFO L231 Difference]: Finished difference. Result has 366 places, 523 transitions, 12099 flow [2022-11-25 16:49:08,531 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=11744, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12099, PETRI_PLACES=366, PETRI_TRANSITIONS=523} [2022-11-25 16:49:08,532 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 344 predicate places. [2022-11-25 16:49:08,532 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 523 transitions, 12099 flow [2022-11-25 16:49:08,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.46153846153845) internal successors, (1839), 13 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:08,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:49:08,532 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:49:08,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 16:49:08,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-25 16:49:08,733 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:49:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:49:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash 138952535, now seen corresponding path program 32 times [2022-11-25 16:49:08,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:49:08,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353323326] [2022-11-25 16:49:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:08,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:49:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:08,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353323326] [2022-11-25 16:49:08,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353323326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696680617] [2022-11-25 16:49:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:49:08,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:08,856 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:08,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 16:49:09,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:49:09,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:49:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:49:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:09,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:09,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696680617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:49:09,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:49:09,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 16:49:09,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2765288] [2022-11-25 16:49:09,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:09,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:49:09,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:49:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:49:09,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:49:09,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 523 transitions, 12099 flow. Second operand has 12 states, 12 states have (on average 141.33333333333334) internal successors, (1696), 12 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:09,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:49:09,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:49:09,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:49:10,911 INFO L130 PetriNetUnfolder]: 1333/2675 cut-off events. [2022-11-25 16:49:10,911 INFO L131 PetriNetUnfolder]: For 104350/104350 co-relation queries the response was YES. [2022-11-25 16:49:10,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28203 conditions, 2675 events. 1333/2675 cut-off events. For 104350/104350 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 18609 event pairs, 166 based on Foata normal form. 40/2714 useless extension candidates. Maximal degree in co-relation 28076. Up to 955 conditions per place. [2022-11-25 16:49:10,944 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 355 selfloop transitions, 239 changer transitions 7/601 dead transitions. [2022-11-25 16:49:10,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 601 transitions, 14419 flow [2022-11-25 16:49:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:49:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 16:49:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2606 transitions. [2022-11-25 16:49:10,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44962042788129747 [2022-11-25 16:49:10,948 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2606 transitions. [2022-11-25 16:49:10,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2606 transitions. [2022-11-25 16:49:10,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:49:10,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2606 transitions. [2022-11-25 16:49:10,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 144.77777777777777) internal successors, (2606), 18 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:10,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:10,958 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 322.0) internal successors, (6118), 19 states have internal predecessors, (6118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:10,958 INFO L175 Difference]: Start difference. First operand has 366 places, 523 transitions, 12099 flow. Second operand 18 states and 2606 transitions. [2022-11-25 16:49:10,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 601 transitions, 14419 flow [2022-11-25 16:49:11,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 601 transitions, 14030 flow, removed 25 selfloop flow, removed 11 redundant places. [2022-11-25 16:49:11,883 INFO L231 Difference]: Finished difference. Result has 372 places, 523 transitions, 12369 flow [2022-11-25 16:49:11,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=11391, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12369, PETRI_PLACES=372, PETRI_TRANSITIONS=523} [2022-11-25 16:49:11,884 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 350 predicate places. [2022-11-25 16:49:11,885 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 523 transitions, 12369 flow [2022-11-25 16:49:11,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.33333333333334) internal successors, (1696), 12 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:11,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:49:11,885 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:49:11,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 16:49:12,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:12,086 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:49:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:49:12,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1041351113, now seen corresponding path program 33 times [2022-11-25 16:49:12,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:49:12,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462376348] [2022-11-25 16:49:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:12,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:49:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:12,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:12,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462376348] [2022-11-25 16:49:12,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462376348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:12,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213560780] [2022-11-25 16:49:12,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:49:12,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:12,215 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:12,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 16:49:12,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:49:12,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:49:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:49:12,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:12,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:12,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213560780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:49:12,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:49:12,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 16:49:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457724777] [2022-11-25 16:49:12,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:12,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:49:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:49:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:49:12,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:49:12,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 523 transitions, 12369 flow. Second operand has 15 states, 15 states have (on average 141.2) internal successors, (2118), 15 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:12,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:49:12,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:49:12,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:49:14,355 INFO L130 PetriNetUnfolder]: 1331/2684 cut-off events. [2022-11-25 16:49:14,355 INFO L131 PetriNetUnfolder]: For 110670/110670 co-relation queries the response was YES. [2022-11-25 16:49:14,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28994 conditions, 2684 events. 1331/2684 cut-off events. For 110670/110670 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18745 event pairs, 44 based on Foata normal form. 40/2723 useless extension candidates. Maximal degree in co-relation 28867. Up to 1054 conditions per place. [2022-11-25 16:49:14,388 INFO L137 encePairwiseOnDemand]: 316/322 looper letters, 358 selfloop transitions, 234 changer transitions 18/610 dead transitions. [2022-11-25 16:49:14,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 610 transitions, 15185 flow [2022-11-25 16:49:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 16:49:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 16:49:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3030 transitions. [2022-11-25 16:49:14,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44809228039041704 [2022-11-25 16:49:14,392 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3030 transitions. [2022-11-25 16:49:14,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3030 transitions. [2022-11-25 16:49:14,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:49:14,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3030 transitions. [2022-11-25 16:49:14,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 144.28571428571428) internal successors, (3030), 21 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:14,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 322.0) internal successors, (7084), 22 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:14,399 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 322.0) internal successors, (7084), 22 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:14,399 INFO L175 Difference]: Start difference. First operand has 372 places, 523 transitions, 12369 flow. Second operand 21 states and 3030 transitions. [2022-11-25 16:49:14,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 610 transitions, 15185 flow [2022-11-25 16:49:15,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 610 transitions, 14763 flow, removed 120 selfloop flow, removed 10 redundant places. [2022-11-25 16:49:15,373 INFO L231 Difference]: Finished difference. Result has 387 places, 534 transitions, 13294 flow [2022-11-25 16:49:15,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=11827, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13294, PETRI_PLACES=387, PETRI_TRANSITIONS=534} [2022-11-25 16:49:15,374 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 365 predicate places. [2022-11-25 16:49:15,374 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 534 transitions, 13294 flow [2022-11-25 16:49:15,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 141.2) internal successors, (2118), 15 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:15,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:49:15,374 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:49:15,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 16:49:15,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:15,575 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:49:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:49:15,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1930703265, now seen corresponding path program 34 times [2022-11-25 16:49:15,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:49:15,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114637787] [2022-11-25 16:49:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:15,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:49:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:15,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114637787] [2022-11-25 16:49:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114637787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681366429] [2022-11-25 16:49:15,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:49:15,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:15,699 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:15,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 16:49:15,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:49:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:49:15,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:49:15,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:15,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:49:16,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681366429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:49:16,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:49:16,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 16:49:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743657186] [2022-11-25 16:49:16,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:16,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 16:49:16,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 16:49:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-25 16:49:16,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 322 [2022-11-25 16:49:16,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 534 transitions, 13294 flow. Second operand has 13 states, 13 states have (on average 141.30769230769232) internal successors, (1837), 13 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:16,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:49:16,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 322 [2022-11-25 16:49:16,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:49:17,803 INFO L130 PetriNetUnfolder]: 1403/2811 cut-off events. [2022-11-25 16:49:17,803 INFO L131 PetriNetUnfolder]: For 129920/129920 co-relation queries the response was YES. [2022-11-25 16:49:17,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31565 conditions, 2811 events. 1403/2811 cut-off events. For 129920/129920 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19731 event pairs, 74 based on Foata normal form. 16/2826 useless extension candidates. Maximal degree in co-relation 31430. Up to 1767 conditions per place. [2022-11-25 16:49:17,838 INFO L137 encePairwiseOnDemand]: 317/322 looper letters, 427 selfloop transitions, 197 changer transitions 0/624 dead transitions. [2022-11-25 16:49:17,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 624 transitions, 16543 flow [2022-11-25 16:49:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 16:49:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 16:49:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2175 transitions. [2022-11-25 16:49:17,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4503105590062112 [2022-11-25 16:49:17,841 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2175 transitions. [2022-11-25 16:49:17,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2175 transitions. [2022-11-25 16:49:17,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:49:17,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2175 transitions. [2022-11-25 16:49:17,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 145.0) internal successors, (2175), 15 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:17,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 322.0) internal successors, (5152), 16 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:17,846 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 322.0) internal successors, (5152), 16 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:17,846 INFO L175 Difference]: Start difference. First operand has 387 places, 534 transitions, 13294 flow. Second operand 15 states and 2175 transitions. [2022-11-25 16:49:17,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 624 transitions, 16543 flow [2022-11-25 16:49:18,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 624 transitions, 15733 flow, removed 288 selfloop flow, removed 11 redundant places. [2022-11-25 16:49:18,929 INFO L231 Difference]: Finished difference. Result has 389 places, 560 transitions, 13978 flow [2022-11-25 16:49:18,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=12411, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13978, PETRI_PLACES=389, PETRI_TRANSITIONS=560} [2022-11-25 16:49:18,930 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 367 predicate places. [2022-11-25 16:49:18,930 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 560 transitions, 13978 flow [2022-11-25 16:49:18,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 141.30769230769232) internal successors, (1837), 13 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:18,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:49:18,931 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:49:18,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-25 16:49:19,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-25 16:49:19,131 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:49:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:49:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1388802504, now seen corresponding path program 35 times [2022-11-25 16:49:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:49:19,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214948528] [2022-11-25 16:49:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:19,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:49:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:49:21,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:21,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214948528] [2022-11-25 16:49:21,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214948528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:21,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575986041] [2022-11-25 16:49:21,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:49:21,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:21,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:21,666 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:21,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 16:49:21,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:49:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:49:21,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 16:49:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:22,948 INFO L321 Elim1Store]: treesize reduction 143, result has 12.3 percent of original size [2022-11-25 16:49:22,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 247 treesize of output 70 [2022-11-25 16:49:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:49:22,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:23,667 INFO L321 Elim1Store]: treesize reduction 114, result has 32.1 percent of original size [2022-11-25 16:49:23,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 325 treesize of output 130 [2022-11-25 16:49:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:49:24,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575986041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:49:24,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:49:24,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-11-25 16:49:24,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329014936] [2022-11-25 16:49:24,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:24,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 16:49:24,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 16:49:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 16:49:27,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 322 [2022-11-25 16:49:27,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 560 transitions, 13978 flow. Second operand has 34 states, 34 states have (on average 118.67647058823529) internal successors, (4035), 34 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:27,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:49:27,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 322 [2022-11-25 16:49:27,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:49:33,113 INFO L130 PetriNetUnfolder]: 4581/9225 cut-off events. [2022-11-25 16:49:33,113 INFO L131 PetriNetUnfolder]: For 455189/455204 co-relation queries the response was YES. [2022-11-25 16:49:33,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105477 conditions, 9225 events. 4581/9225 cut-off events. For 455189/455204 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 81763 event pairs, 295 based on Foata normal form. 68/9272 useless extension candidates. Maximal degree in co-relation 105339. Up to 2946 conditions per place. [2022-11-25 16:49:33,279 INFO L137 encePairwiseOnDemand]: 313/322 looper letters, 801 selfloop transitions, 992 changer transitions 43/1846 dead transitions. [2022-11-25 16:49:33,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1846 transitions, 49640 flow [2022-11-25 16:49:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 16:49:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 16:49:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2480 transitions. [2022-11-25 16:49:33,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38509316770186336 [2022-11-25 16:49:33,283 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2480 transitions. [2022-11-25 16:49:33,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2480 transitions. [2022-11-25 16:49:33,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:49:33,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2480 transitions. [2022-11-25 16:49:33,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 124.0) internal successors, (2480), 20 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:33,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 322.0) internal successors, (6762), 21 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:33,291 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 322.0) internal successors, (6762), 21 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:33,291 INFO L175 Difference]: Start difference. First operand has 389 places, 560 transitions, 13978 flow. Second operand 20 states and 2480 transitions. [2022-11-25 16:49:33,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1846 transitions, 49640 flow [2022-11-25 16:49:40,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1846 transitions, 48647 flow, removed 415 selfloop flow, removed 7 redundant places. [2022-11-25 16:49:40,137 INFO L231 Difference]: Finished difference. Result has 414 places, 1497 transitions, 41584 flow [2022-11-25 16:49:40,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=13664, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=41584, PETRI_PLACES=414, PETRI_TRANSITIONS=1497} [2022-11-25 16:49:40,139 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 392 predicate places. [2022-11-25 16:49:40,139 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1497 transitions, 41584 flow [2022-11-25 16:49:40,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 118.67647058823529) internal successors, (4035), 34 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:40,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:49:40,139 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:49:40,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 16:49:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 16:49:40,340 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:49:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:49:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1857017808, now seen corresponding path program 36 times [2022-11-25 16:49:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:49:40,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784226210] [2022-11-25 16:49:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:49:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:49:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:49:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 16:49:42,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:49:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784226210] [2022-11-25 16:49:42,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784226210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:49:42,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547152052] [2022-11-25 16:49:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:49:42,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:49:42,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:49:42,054 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:49:42,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 16:49:42,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 16:49:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:49:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 16:49:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:49:42,838 INFO L321 Elim1Store]: treesize reduction 73, result has 27.7 percent of original size [2022-11-25 16:49:42,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 52 [2022-11-25 16:49:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:49:42,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:49:43,089 INFO L321 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2022-11-25 16:49:43,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 105 [2022-11-25 16:49:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 16:49:43,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547152052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:49:43,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:49:43,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 4] total 21 [2022-11-25 16:49:43,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301949831] [2022-11-25 16:49:43,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:49:43,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 16:49:43,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:49:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 16:49:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:49:44,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 322 [2022-11-25 16:49:44,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1497 transitions, 41584 flow. Second operand has 23 states, 23 states have (on average 130.08695652173913) internal successors, (2992), 23 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:44,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 16:49:44,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 322 [2022-11-25 16:49:44,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 16:49:58,065 INFO L130 PetriNetUnfolder]: 6520/13249 cut-off events. [2022-11-25 16:49:58,065 INFO L131 PetriNetUnfolder]: For 721586/721600 co-relation queries the response was YES. [2022-11-25 16:49:58,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161899 conditions, 13249 events. 6520/13249 cut-off events. For 721586/721600 co-relation queries the response was YES. Maximal size of possible extension queue 1140. Compared 124615 event pairs, 567 based on Foata normal form. 61/13278 useless extension candidates. Maximal degree in co-relation 161748. Up to 7951 conditions per place. [2022-11-25 16:49:58,308 INFO L137 encePairwiseOnDemand]: 315/322 looper letters, 1314 selfloop transitions, 999 changer transitions 29/2352 dead transitions. [2022-11-25 16:49:58,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 2352 transitions, 69524 flow [2022-11-25 16:49:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 16:49:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 16:49:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2822 transitions. [2022-11-25 16:49:58,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4173321502514049 [2022-11-25 16:49:58,313 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2822 transitions. [2022-11-25 16:49:58,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2822 transitions. [2022-11-25 16:49:58,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 16:49:58,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2822 transitions. [2022-11-25 16:49:58,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 134.38095238095238) internal successors, (2822), 21 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:58,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 322.0) internal successors, (7084), 22 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:58,324 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 322.0) internal successors, (7084), 22 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:49:58,324 INFO L175 Difference]: Start difference. First operand has 414 places, 1497 transitions, 41584 flow. Second operand 21 states and 2822 transitions. [2022-11-25 16:49:58,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 2352 transitions, 69524 flow [2022-11-25 16:50:11,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 2352 transitions, 67241 flow, removed 1101 selfloop flow, removed 3 redundant places. [2022-11-25 16:50:11,857 INFO L231 Difference]: Finished difference. Result has 439 places, 2118 transitions, 60885 flow [2022-11-25 16:50:11,858 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=39654, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=555, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=60885, PETRI_PLACES=439, PETRI_TRANSITIONS=2118} [2022-11-25 16:50:11,859 INFO L288 CegarLoopForPetriNet]: 22 programPoint places, 417 predicate places. [2022-11-25 16:50:11,859 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 2118 transitions, 60885 flow [2022-11-25 16:50:11,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 130.08695652173913) internal successors, (2992), 23 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:50:11,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 16:50:11,860 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:50:11,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 16:50:12,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-25 16:50:12,066 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 16:50:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:50:12,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1648188718, now seen corresponding path program 37 times [2022-11-25 16:50:12,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:50:12,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950724177] [2022-11-25 16:50:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:50:12,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:50:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:50:14,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:50:14,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950724177] [2022-11-25 16:50:14,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950724177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:50:14,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704313708] [2022-11-25 16:50:14,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:50:14,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:50:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:50:14,302 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:50:14,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798af8c1-d302-4f97-b5ca-b4483f821651/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 16:50:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:50:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-25 16:50:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:50:14,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:50:14,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:50:14,561 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 16:50:14,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 16:50:14,713 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 13 treesize of output 9 [2022-11-25 16:50:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:50:14,811 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 16:50:14,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 16:50:14,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:50:14,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:50:15,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 16:50:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:50:15,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2022-11-25 16:50:15,716 INFO L321 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2022-11-25 16:50:15,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 67 [2022-11-25 16:50:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:50:15,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:50:17,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:50:17,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 846 treesize of output 498 [2022-11-25 16:50:22,492 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 349 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 16:50:22,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:50:22,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 23 new quantified variables, introduced 78 case distinctions, treesize of input 206924 treesize of output 181472 [2022-11-25 16:50:25,162 INFO L217 Elim1Store]: Index analysis took 226 ms