./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/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_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/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_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- 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 17:14:29,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:14:29,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:14:29,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:14:29,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:14:29,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:14:29,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:14:29,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:14:29,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:14:29,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:14:29,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:14:29,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:14:29,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:14:29,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:14:29,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:14:29,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:14:29,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:14:29,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:14:29,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:14:29,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:14:29,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:14:29,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:14:29,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:14:29,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:14:29,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:14:29,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:14:29,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:14:29,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:14:29,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:14:29,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:14:29,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:14:29,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:14:29,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:14:29,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:14:29,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:14:29,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:14:29,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:14:29,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:14:29,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:14:29,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:14:29,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:14:29,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:14:29,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:14:29,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:14:29,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:14:29,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:14:29,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:14:29,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:14:29,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:14:29,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:14:29,485 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:14:29,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:14:29,487 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:14:29,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:14:29,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:14:29,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:14:29,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:14:29,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:14:29,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:14:29,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:14:29,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:14:29,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:14:29,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:14:29,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:14:29,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:14:29,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:14:29,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:14:29,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:14:29,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:14:29,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:14:29,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:14:29,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:14:29,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:14:29,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:14:29,495 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:14:29,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:14:29,496 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_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2022-11-25 17:14:29,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:14:29,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:14:29,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:14:29,845 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:14:29,847 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:14:29,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-11-25 17:14:33,186 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:14:33,501 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:14:33,501 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-11-25 17:14:33,507 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/data/d2ddc4ed6/cfe55ddc184b4eb49d0b9cffbddfe203/FLAG23d72b79f [2022-11-25 17:14:33,523 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/data/d2ddc4ed6/cfe55ddc184b4eb49d0b9cffbddfe203 [2022-11-25 17:14:33,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:14:33,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:14:33,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:14:33,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:14:33,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:14:33,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6542a5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33, skipping insertion in model container [2022-11-25 17:14:33,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:14:33,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:14:33,745 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_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2022-11-25 17:14:33,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:14:33,765 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:14:33,789 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_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2022-11-25 17:14:33,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:14:33,808 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:14:33,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33 WrapperNode [2022-11-25 17:14:33,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:14:33,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:14:33,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:14:33,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:14:33,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,855 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2022-11-25 17:14:33,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:14:33,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:14:33,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:14:33,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:14:33,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,915 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:14:33,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:14:33,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:14:33,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:14:33,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (1/1) ... [2022-11-25 17:14:33,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:14:33,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:33,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:14:33,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:14:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:14:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:14:34,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:14:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:14:34,040 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:14:34,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:14:34,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:14:34,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:14:34,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:14:34,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:14:34,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:14:34,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:14:34,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:14:34,043 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 17:14:34,194 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:14:34,196 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:14:34,589 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:14:34,604 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:14:34,609 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:14:34,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:14:34 BoogieIcfgContainer [2022-11-25 17:14:34,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:14:34,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:14:34,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:14:34,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:14:34,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:14:33" (1/3) ... [2022-11-25 17:14:34,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613bb408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:14:34, skipping insertion in model container [2022-11-25 17:14:34,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:14:33" (2/3) ... [2022-11-25 17:14:34,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613bb408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:14:34, skipping insertion in model container [2022-11-25 17:14:34,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:14:34" (3/3) ... [2022-11-25 17:14:34,623 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2022-11-25 17:14:34,633 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:14:34,646 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:14:34,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:14:34,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:14:34,746 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:14:34,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 374 flow [2022-11-25 17:14:34,900 INFO L130 PetriNetUnfolder]: 15/177 cut-off events. [2022-11-25 17:14:34,900 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:14:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 220 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-11-25 17:14:34,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 374 flow [2022-11-25 17:14:34,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2022-11-25 17:14:34,919 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:14:34,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 168 transitions, 348 flow [2022-11-25 17:14:34,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 168 transitions, 348 flow [2022-11-25 17:14:34,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 168 transitions, 348 flow [2022-11-25 17:14:34,995 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2022-11-25 17:14:34,996 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:14:34,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 214 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-11-25 17:14:35,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 2960 [2022-11-25 17:14:41,609 INFO L134 LiptonReduction]: Checked pairs total: 2860 [2022-11-25 17:14:41,609 INFO L136 LiptonReduction]: Total number of compositions: 196 [2022-11-25 17:14:41,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:14:41,635 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;@630a847b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:14:41,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:14:41,642 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 17:14:41,643 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:14:41,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:41,644 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:41,644 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 17:14:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash -42465642, now seen corresponding path program 1 times [2022-11-25 17:14:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:41,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029670865] [2022-11-25 17:14:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:42,175 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 17:14:42,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:42,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029670865] [2022-11-25 17:14:42,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029670865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:14:42,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:14:42,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:14:42,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42297692] [2022-11-25 17:14:42,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:14:42,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:14:42,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:14:42,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:14:42,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 375 [2022-11-25 17:14:42,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states 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 17:14:42,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:42,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 375 [2022-11-25 17:14:42,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:42,362 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2022-11-25 17:14:42,363 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:14:42,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 201 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2022-11-25 17:14:42,365 INFO L137 encePairwiseOnDemand]: 372/375 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-11-25 17:14:42,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-11-25 17:14:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:14:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:14:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2022-11-25 17:14:42,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4391111111111111 [2022-11-25 17:14:42,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2022-11-25 17:14:42,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2022-11-25 17:14:42,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:42,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2022-11-25 17:14:42,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:14:42,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 17:14:42,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states 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 17:14:42,415 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 494 transitions. [2022-11-25 17:14:42,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-11-25 17:14:42,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:14:42,422 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-11-25 17:14:42,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-11-25 17:14:42,428 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-11-25 17:14:42,429 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-11-25 17:14:42,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states 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 17:14:42,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:42,430 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:42,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:14:42,431 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 17:14:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash 265100609, now seen corresponding path program 1 times [2022-11-25 17:14:42,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:42,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263744698] [2022-11-25 17:14:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:42,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:14:42,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263744698] [2022-11-25 17:14:42,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263744698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:14:42,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:14:42,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:14:42,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517453491] [2022-11-25 17:14:42,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:14:42,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:14:42,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:14:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:14:42,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2022-11-25 17:14:42,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:14:42,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:42,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2022-11-25 17:14:42,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:43,182 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2022-11-25 17:14:43,182 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:14:43,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 369 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2022-11-25 17:14:43,184 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2022-11-25 17:14:43,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2022-11-25 17:14:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:14:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:14:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 795 transitions. [2022-11-25 17:14:43,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.424 [2022-11-25 17:14:43,190 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 795 transitions. [2022-11-25 17:14:43,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 795 transitions. [2022-11-25 17:14:43,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:43,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 795 transitions. [2022-11-25 17:14:43,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states 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 17:14:43,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:43,202 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:43,202 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 795 transitions. [2022-11-25 17:14:43,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2022-11-25 17:14:43,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:14:43,205 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2022-11-25 17:14:43,205 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-11-25 17:14:43,206 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-11-25 17:14:43,206 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2022-11-25 17:14:43,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:14:43,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:43,207 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:43,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:14:43,208 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 17:14:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:43,209 INFO L85 PathProgramCache]: Analyzing trace with hash 534954531, now seen corresponding path program 2 times [2022-11-25 17:14:43,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:43,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853916711] [2022-11-25 17:14:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:14:43,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:43,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853916711] [2022-11-25 17:14:43,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853916711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:14:43,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:14:43,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:14:43,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070039718] [2022-11-25 17:14:43,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:14:43,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:14:43,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:14:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:14:43,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2022-11-25 17:14:43,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:14:43,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:43,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2022-11-25 17:14:43,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:43,853 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2022-11-25 17:14:43,853 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-11-25 17:14:43,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 600 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2022-11-25 17:14:43,856 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2022-11-25 17:14:43,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2022-11-25 17:14:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:14:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:14:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 954 transitions. [2022-11-25 17:14:43,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.424 [2022-11-25 17:14:43,860 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 954 transitions. [2022-11-25 17:14:43,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 954 transitions. [2022-11-25 17:14:43,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:43,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 954 transitions. [2022-11-25 17:14:43,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 17:14:43,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 17:14:43,871 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 17:14:43,871 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 954 transitions. [2022-11-25 17:14:43,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2022-11-25 17:14:43,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-25 17:14:43,874 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2022-11-25 17:14:43,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2022-11-25 17:14:43,875 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2022-11-25 17:14:43,876 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2022-11-25 17:14:43,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:14:43,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:43,877 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:43,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:14:43,877 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 17:14:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1331617067, now seen corresponding path program 3 times [2022-11-25 17:14:43,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:43,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857696135] [2022-11-25 17:14:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:43,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:14:44,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:44,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857696135] [2022-11-25 17:14:44,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857696135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:14:44,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:14:44,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:14:44,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138083762] [2022-11-25 17:14:44,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:14:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:14:44,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:14:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:14:44,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 375 [2022-11-25 17:14:44,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 17:14:44,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:44,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 375 [2022-11-25 17:14:44,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:44,312 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2022-11-25 17:14:44,312 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2022-11-25 17:14:44,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 700 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2022-11-25 17:14:44,315 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2022-11-25 17:14:44,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2022-11-25 17:14:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:14:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:14:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 791 transitions. [2022-11-25 17:14:44,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42186666666666667 [2022-11-25 17:14:44,322 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 791 transitions. [2022-11-25 17:14:44,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 791 transitions. [2022-11-25 17:14:44,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:44,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 791 transitions. [2022-11-25 17:14:44,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.2) internal successors, (791), 5 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 17:14:44,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:44,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:44,335 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 791 transitions. [2022-11-25 17:14:44,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2022-11-25 17:14:44,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-25 17:14:44,347 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2022-11-25 17:14:44,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-11-25 17:14:44,350 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2022-11-25 17:14:44,350 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2022-11-25 17:14:44,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 17:14:44,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:44,352 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:44,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:14:44,353 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 17:14:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash -485748525, now seen corresponding path program 4 times [2022-11-25 17:14:44,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:44,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745535395] [2022-11-25 17:14:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:14:44,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:44,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745535395] [2022-11-25 17:14:44,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745535395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:14:44,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:14:44,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:14:44,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305849988] [2022-11-25 17:14:44,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:14:44,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:14:44,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:14:44,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:14:44,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 375 [2022-11-25 17:14:44,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 17:14:44,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:44,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 375 [2022-11-25 17:14:44,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:44,745 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2022-11-25 17:14:44,745 INFO L131 PetriNetUnfolder]: For 610/610 co-relation queries the response was YES. [2022-11-25 17:14:44,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 659 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2022-11-25 17:14:44,748 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2022-11-25 17:14:44,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2022-11-25 17:14:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:14:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:14:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 785 transitions. [2022-11-25 17:14:44,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4186666666666667 [2022-11-25 17:14:44,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 785 transitions. [2022-11-25 17:14:44,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 785 transitions. [2022-11-25 17:14:44,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:44,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 785 transitions. [2022-11-25 17:14:44,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 17:14:44,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:44,759 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:44,759 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 785 transitions. [2022-11-25 17:14:44,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2022-11-25 17:14:44,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:14:44,764 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2022-11-25 17:14:44,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-11-25 17:14:44,765 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2022-11-25 17:14:44,765 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2022-11-25 17:14:44,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states 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 17:14:44,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:44,766 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:44,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:14:44,767 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 17:14:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1712238623, now seen corresponding path program 5 times [2022-11-25 17:14:44,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:44,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131731386] [2022-11-25 17:14:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:14:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:44,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131731386] [2022-11-25 17:14:44,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131731386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:14:44,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:14:44,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:14:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896054239] [2022-11-25 17:14:44,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:14:44,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:14:44,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:14:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:14:45,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2022-11-25 17:14:45,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:14:45,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:45,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2022-11-25 17:14:45,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:45,145 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2022-11-25 17:14:45,146 INFO L131 PetriNetUnfolder]: For 616/616 co-relation queries the response was YES. [2022-11-25 17:14:45,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2022-11-25 17:14:45,149 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2022-11-25 17:14:45,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2022-11-25 17:14:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:14:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:14:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 794 transitions. [2022-11-25 17:14:45,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42346666666666666 [2022-11-25 17:14:45,152 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 794 transitions. [2022-11-25 17:14:45,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 794 transitions. [2022-11-25 17:14:45,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:45,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 794 transitions. [2022-11-25 17:14:45,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.8) internal successors, (794), 5 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 17:14:45,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:45,159 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:45,160 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 794 transitions. [2022-11-25 17:14:45,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2022-11-25 17:14:45,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-11-25 17:14:45,165 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2022-11-25 17:14:45,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2022-11-25 17:14:45,166 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2022-11-25 17:14:45,167 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2022-11-25 17:14:45,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:14:45,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:45,168 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:45,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:14:45,168 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 17:14:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:45,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1425939945, now seen corresponding path program 6 times [2022-11-25 17:14:45,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:45,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269835430] [2022-11-25 17:14:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:45,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:14:45,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269835430] [2022-11-25 17:14:45,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269835430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:14:45,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:14:45,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:14:45,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3971052] [2022-11-25 17:14:45,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:14:45,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:14:45,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:14:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:14:45,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 375 [2022-11-25 17:14:45,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:14:45,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:14:45,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 375 [2022-11-25 17:14:45,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:14:45,537 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2022-11-25 17:14:45,538 INFO L131 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2022-11-25 17:14:45,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 638 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2022-11-25 17:14:45,540 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2022-11-25 17:14:45,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2022-11-25 17:14:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:14:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:14:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 790 transitions. [2022-11-25 17:14:45,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42133333333333334 [2022-11-25 17:14:45,544 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 790 transitions. [2022-11-25 17:14:45,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 790 transitions. [2022-11-25 17:14:45,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:14:45,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 790 transitions. [2022-11-25 17:14:45,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 17:14:45,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:45,551 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states 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 17:14:45,551 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 790 transitions. [2022-11-25 17:14:45,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2022-11-25 17:14:45,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 17:14:45,558 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2022-11-25 17:14:45,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-11-25 17:14:45,559 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2022-11-25 17:14:45,560 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2022-11-25 17:14:45,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:14:45,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:14:45,561 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:14:45,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:14:45,561 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 17:14:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:14:45,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2135786527, now seen corresponding path program 1 times [2022-11-25 17:14:45,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:14:45,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972107230] [2022-11-25 17:14:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:45,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:14:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:46,005 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 17:14:46,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:14:46,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972107230] [2022-11-25 17:14:46,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972107230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:14:46,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474545619] [2022-11-25 17:14:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:14:46,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:14:46,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:14:46,011 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:14:46,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:14:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:14:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 17:14:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:14:46,328 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 17:14:46,464 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 17:14:46,539 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 17:14:47,090 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2022-11-25 17:14:47,091 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 120 [2022-11-25 17:14:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:47,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:14:49,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:49,920 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 114 treesize of output 78 [2022-11-25 17:14:49,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:49,953 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 488 treesize of output 444 [2022-11-25 17:14:49,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:49,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 424 treesize of output 396 [2022-11-25 17:14:50,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:14:50,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 300 [2022-11-25 17:14:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:14:51,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474545619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:14:51,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:14:51,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2022-11-25 17:14:51,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326972753] [2022-11-25 17:14:51,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:14:51,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:14:51,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:14:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:14:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=422, Unknown=4, NotChecked=0, Total=552 [2022-11-25 17:14:53,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:14:56,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:14:58,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:15:00,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:15:03,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:15:03,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 375 [2022-11-25 17:15:03,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 24 states, 24 states have (on average 88.0) internal successors, (2112), 24 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 17:15:03,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:03,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 375 [2022-11-25 17:15:03,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:12,404 INFO L130 PetriNetUnfolder]: 444/772 cut-off events. [2022-11-25 17:15:12,404 INFO L131 PetriNetUnfolder]: For 2254/2254 co-relation queries the response was YES. [2022-11-25 17:15:12,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 772 events. 444/772 cut-off events. For 2254/2254 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3492 event pairs, 0 based on Foata normal form. 7/646 useless extension candidates. Maximal degree in co-relation 2408. Up to 259 conditions per place. [2022-11-25 17:15:12,411 INFO L137 encePairwiseOnDemand]: 364/375 looper letters, 102 selfloop transitions, 89 changer transitions 78/269 dead transitions. [2022-11-25 17:15:12,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 269 transitions, 2140 flow [2022-11-25 17:15:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:15:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-25 17:15:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3767 transitions. [2022-11-25 17:15:12,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.24500813008130082 [2022-11-25 17:15:12,424 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3767 transitions. [2022-11-25 17:15:12,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3767 transitions. [2022-11-25 17:15:12,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:12,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3767 transitions. [2022-11-25 17:15:12,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 91.8780487804878) internal successors, (3767), 41 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states 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 17:15:12,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 375.0) internal successors, (15750), 42 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states 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 17:15:12,461 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 375.0) internal successors, (15750), 42 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states 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 17:15:12,461 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 41 states and 3767 transitions. [2022-11-25 17:15:12,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 269 transitions, 2140 flow [2022-11-25 17:15:12,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 269 transitions, 2053 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-25 17:15:12,476 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 1121 flow [2022-11-25 17:15:12,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1121, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2022-11-25 17:15:12,479 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2022-11-25 17:15:12,481 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 1121 flow [2022-11-25 17:15:12,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.0) internal successors, (2112), 24 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 17:15:12,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:12,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:12,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:12,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 17:15:12,689 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 17:15:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash 243153945, now seen corresponding path program 1 times [2022-11-25 17:15:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:12,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987487104] [2022-11-25 17:15:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:12,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:13,121 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 17:15:13,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987487104] [2022-11-25 17:15:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987487104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336964484] [2022-11-25 17:15:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:13,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:13,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:13,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:15:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:15:13,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:13,404 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 89 treesize of output 81 [2022-11-25 17:15:13,430 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 17:15:13,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:13,758 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-25 17:15:13,759 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 19 treesize of output 11 [2022-11-25 17:15:13,844 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 17:15:13,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336964484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:13,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:13,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2022-11-25 17:15:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69146135] [2022-11-25 17:15:13,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:15:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:15:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:15:14,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 375 [2022-11-25 17:15:14,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 1121 flow. Second operand has 12 states, 12 states have (on average 140.5) internal successors, (1686), 12 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 17:15:14,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:14,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 375 [2022-11-25 17:15:14,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:15,652 INFO L130 PetriNetUnfolder]: 479/818 cut-off events. [2022-11-25 17:15:15,652 INFO L131 PetriNetUnfolder]: For 4065/4065 co-relation queries the response was YES. [2022-11-25 17:15:15,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4062 conditions, 818 events. 479/818 cut-off events. For 4065/4065 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3633 event pairs, 18 based on Foata normal form. 1/745 useless extension candidates. Maximal degree in co-relation 3982. Up to 253 conditions per place. [2022-11-25 17:15:15,663 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 88 selfloop transitions, 112 changer transitions 4/204 dead transitions. [2022-11-25 17:15:15,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 204 transitions, 2140 flow [2022-11-25 17:15:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:15:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:15:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1896 transitions. [2022-11-25 17:15:15,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3889230769230769 [2022-11-25 17:15:15,669 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1896 transitions. [2022-11-25 17:15:15,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1896 transitions. [2022-11-25 17:15:15,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:15,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1896 transitions. [2022-11-25 17:15:15,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 145.84615384615384) internal successors, (1896), 13 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states 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 17:15:15,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 17:15:15,684 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 17:15:15,685 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 1121 flow. Second operand 13 states and 1896 transitions. [2022-11-25 17:15:15,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 204 transitions, 2140 flow [2022-11-25 17:15:15,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 204 transitions, 1692 flow, removed 117 selfloop flow, removed 15 redundant places. [2022-11-25 17:15:15,716 INFO L231 Difference]: Finished difference. Result has 101 places, 153 transitions, 1497 flow [2022-11-25 17:15:15,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1497, PETRI_PLACES=101, PETRI_TRANSITIONS=153} [2022-11-25 17:15:15,718 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2022-11-25 17:15:15,719 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 153 transitions, 1497 flow [2022-11-25 17:15:15,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.5) internal successors, (1686), 12 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 17:15:15,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:15,720 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:15,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:15,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:15,927 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 17:15:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:15,927 INFO L85 PathProgramCache]: Analyzing trace with hash -437201423, now seen corresponding path program 2 times [2022-11-25 17:15:15,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:15,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818048687] [2022-11-25 17:15:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:16,368 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 17:15:16,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:16,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818048687] [2022-11-25 17:15:16,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818048687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53025117] [2022-11-25 17:15:16,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:15:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:16,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:16,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:15:16,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:16,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:15:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:16,668 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 89 treesize of output 81 [2022-11-25 17:15:16,697 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 17:15:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:17,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:17,002 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 70 treesize of output 59 [2022-11-25 17:15:17,159 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 17:15:17,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53025117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:17,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:17,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2022-11-25 17:15:17,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039848833] [2022-11-25 17:15:17,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:17,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:15:17,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:17,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:15:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:15:17,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 375 [2022-11-25 17:15:17,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 153 transitions, 1497 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 17:15:17,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:17,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 375 [2022-11-25 17:15:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:18,891 INFO L130 PetriNetUnfolder]: 571/975 cut-off events. [2022-11-25 17:15:18,891 INFO L131 PetriNetUnfolder]: For 3768/3768 co-relation queries the response was YES. [2022-11-25 17:15:18,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4617 conditions, 975 events. 571/975 cut-off events. For 3768/3768 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4596 event pairs, 8 based on Foata normal form. 2/976 useless extension candidates. Maximal degree in co-relation 4346. Up to 452 conditions per place. [2022-11-25 17:15:18,903 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 90 selfloop transitions, 122 changer transitions 4/216 dead transitions. [2022-11-25 17:15:18,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 216 transitions, 2270 flow [2022-11-25 17:15:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:15:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:15:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1898 transitions. [2022-11-25 17:15:18,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3893333333333333 [2022-11-25 17:15:18,909 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1898 transitions. [2022-11-25 17:15:18,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1898 transitions. [2022-11-25 17:15:18,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:18,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1898 transitions. [2022-11-25 17:15:18,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 146.0) internal successors, (1898), 13 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states 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 17:15:18,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 17:15:18,941 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 375.0) internal successors, (5250), 14 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states 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 17:15:18,941 INFO L175 Difference]: Start difference. First operand has 101 places, 153 transitions, 1497 flow. Second operand 13 states and 1898 transitions. [2022-11-25 17:15:18,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 216 transitions, 2270 flow [2022-11-25 17:15:18,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 216 transitions, 2215 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-11-25 17:15:18,983 INFO L231 Difference]: Finished difference. Result has 115 places, 175 transitions, 2067 flow [2022-11-25 17:15:18,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2067, PETRI_PLACES=115, PETRI_TRANSITIONS=175} [2022-11-25 17:15:18,985 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2022-11-25 17:15:18,986 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 175 transitions, 2067 flow [2022-11-25 17:15:18,986 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 17:15:18,987 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:18,987 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:18,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:19,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:15:19,193 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 17:15:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash 792960153, now seen corresponding path program 3 times [2022-11-25 17:15:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:19,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937489132] [2022-11-25 17:15:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:19,687 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 17:15:19,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:19,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937489132] [2022-11-25 17:15:19,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937489132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:19,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060445384] [2022-11-25 17:15:19,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:15:19,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:19,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:19,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:19,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:15:19,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:15:19,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:19,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:15:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:19,963 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 15 treesize of output 7 [2022-11-25 17:15:19,976 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 17:15:19,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:20,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:20,075 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 139 treesize of output 135 [2022-11-25 17:15:20,260 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 17:15:20,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060445384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:20,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:20,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-25 17:15:20,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878023972] [2022-11-25 17:15:20,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:20,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:15:20,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:15:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:15:20,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 375 [2022-11-25 17:15:20,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 175 transitions, 2067 flow. Second operand has 13 states, 13 states have (on average 140.3846153846154) internal successors, (1825), 13 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states 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 17:15:20,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:20,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 375 [2022-11-25 17:15:20,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:21,693 INFO L130 PetriNetUnfolder]: 580/995 cut-off events. [2022-11-25 17:15:21,693 INFO L131 PetriNetUnfolder]: For 5474/5474 co-relation queries the response was YES. [2022-11-25 17:15:21,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5386 conditions, 995 events. 580/995 cut-off events. For 5474/5474 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4688 event pairs, 96 based on Foata normal form. 1/995 useless extension candidates. Maximal degree in co-relation 5176. Up to 816 conditions per place. [2022-11-25 17:15:21,704 INFO L137 encePairwiseOnDemand]: 366/375 looper letters, 147 selfloop transitions, 54 changer transitions 4/205 dead transitions. [2022-11-25 17:15:21,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 205 transitions, 2583 flow [2022-11-25 17:15:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:15:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:15:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1723 transitions. [2022-11-25 17:15:21,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3828888888888889 [2022-11-25 17:15:21,710 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1723 transitions. [2022-11-25 17:15:21,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1723 transitions. [2022-11-25 17:15:21,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:21,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1723 transitions. [2022-11-25 17:15:21,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 143.58333333333334) internal successors, (1723), 12 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states 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 17:15:21,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states 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 17:15:21,722 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 375.0) internal successors, (4875), 13 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states 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 17:15:21,722 INFO L175 Difference]: Start difference. First operand has 115 places, 175 transitions, 2067 flow. Second operand 12 states and 1723 transitions. [2022-11-25 17:15:21,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 205 transitions, 2583 flow [2022-11-25 17:15:21,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 205 transitions, 2528 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-11-25 17:15:21,766 INFO L231 Difference]: Finished difference. Result has 125 places, 178 transitions, 2165 flow [2022-11-25 17:15:21,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2165, PETRI_PLACES=125, PETRI_TRANSITIONS=178} [2022-11-25 17:15:21,767 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2022-11-25 17:15:21,767 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 178 transitions, 2165 flow [2022-11-25 17:15:21,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 140.3846153846154) internal successors, (1825), 13 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states 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 17:15:21,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:21,768 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:21,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:21,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:15:21,974 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 17:15:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash 798999357, now seen corresponding path program 4 times [2022-11-25 17:15:21,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:21,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893649304] [2022-11-25 17:15:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:22,429 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 17:15:22,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:22,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893649304] [2022-11-25 17:15:22,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893649304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:22,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775641064] [2022-11-25 17:15:22,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:15:22,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:22,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:22,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:22,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:15:22,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:15:22,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:22,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:15:22,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:22,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:15:22,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:15:22,806 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 15 treesize of output 7 [2022-11-25 17:15:22,816 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 17:15:22,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:23,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:23,160 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 46 treesize of output 34 [2022-11-25 17:15:23,166 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 17:15:23,308 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 17:15:23,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775641064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:23,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:23,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-25 17:15:23,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836444162] [2022-11-25 17:15:23,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:23,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:15:23,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:23,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:15:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:15:24,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 375 [2022-11-25 17:15:24,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 178 transitions, 2165 flow. Second operand has 20 states, 20 states have (on average 137.0) internal successors, (2740), 20 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 17:15:24,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:24,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 375 [2022-11-25 17:15:24,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:27,464 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 17:15:28,705 INFO L130 PetriNetUnfolder]: 656/1139 cut-off events. [2022-11-25 17:15:28,705 INFO L131 PetriNetUnfolder]: For 6132/6132 co-relation queries the response was YES. [2022-11-25 17:15:28,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 1139 events. 656/1139 cut-off events. For 6132/6132 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5693 event pairs, 13 based on Foata normal form. 2/1140 useless extension candidates. Maximal degree in co-relation 6011. Up to 281 conditions per place. [2022-11-25 17:15:28,718 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 101 selfloop transitions, 151 changer transitions 8/260 dead transitions. [2022-11-25 17:15:28,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 260 transitions, 3178 flow [2022-11-25 17:15:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:15:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:15:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2279 transitions. [2022-11-25 17:15:28,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37983333333333336 [2022-11-25 17:15:28,724 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2279 transitions. [2022-11-25 17:15:28,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2279 transitions. [2022-11-25 17:15:28,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:28,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2279 transitions. [2022-11-25 17:15:28,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 142.4375) internal successors, (2279), 16 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states 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 17:15:28,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states 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 17:15:28,744 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states 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 17:15:28,744 INFO L175 Difference]: Start difference. First operand has 125 places, 178 transitions, 2165 flow. Second operand 16 states and 2279 transitions. [2022-11-25 17:15:28,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 260 transitions, 3178 flow [2022-11-25 17:15:28,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 260 transitions, 3011 flow, removed 5 selfloop flow, removed 10 redundant places. [2022-11-25 17:15:28,797 INFO L231 Difference]: Finished difference. Result has 137 places, 199 transitions, 2729 flow [2022-11-25 17:15:28,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2729, PETRI_PLACES=137, PETRI_TRANSITIONS=199} [2022-11-25 17:15:28,799 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2022-11-25 17:15:28,799 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 199 transitions, 2729 flow [2022-11-25 17:15:28,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 137.0) internal successors, (2740), 20 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states 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 17:15:28,800 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:28,800 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:28,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:29,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:15:29,006 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 17:15:29,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1571946649, now seen corresponding path program 5 times [2022-11-25 17:15:29,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:29,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361657240] [2022-11-25 17:15:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:29,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:29,381 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 17:15:29,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:29,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361657240] [2022-11-25 17:15:29,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361657240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:29,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087021258] [2022-11-25 17:15:29,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:15:29,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:29,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:29,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:29,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:15:29,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:29,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:15:29,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:29,673 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 89 treesize of output 81 [2022-11-25 17:15:29,697 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 17:15:29,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:29,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:29,979 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 70 treesize of output 59 [2022-11-25 17:15:30,149 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 17:15:30,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087021258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:30,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:30,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2022-11-25 17:15:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179059291] [2022-11-25 17:15:30,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:30,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:15:30,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:15:30,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:15:30,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 375 [2022-11-25 17:15:30,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 199 transitions, 2729 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 17:15:30,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:30,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 375 [2022-11-25 17:15:30,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:31,537 INFO L130 PetriNetUnfolder]: 674/1176 cut-off events. [2022-11-25 17:15:31,537 INFO L131 PetriNetUnfolder]: For 9721/9721 co-relation queries the response was YES. [2022-11-25 17:15:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7185 conditions, 1176 events. 674/1176 cut-off events. For 9721/9721 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5925 event pairs, 128 based on Foata normal form. 2/1177 useless extension candidates. Maximal degree in co-relation 6940. Up to 934 conditions per place. [2022-11-25 17:15:31,553 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 165 selfloop transitions, 59 changer transitions 4/228 dead transitions. [2022-11-25 17:15:31,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 228 transitions, 3333 flow [2022-11-25 17:15:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:15:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:15:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1315 transitions. [2022-11-25 17:15:31,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3896296296296296 [2022-11-25 17:15:31,556 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1315 transitions. [2022-11-25 17:15:31,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1315 transitions. [2022-11-25 17:15:31,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:31,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1315 transitions. [2022-11-25 17:15:31,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 146.11111111111111) internal successors, (1315), 9 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states 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 17:15:31,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 17:15:31,564 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 375.0) internal successors, (3750), 10 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states 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 17:15:31,564 INFO L175 Difference]: Start difference. First operand has 137 places, 199 transitions, 2729 flow. Second operand 9 states and 1315 transitions. [2022-11-25 17:15:31,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 228 transitions, 3333 flow [2022-11-25 17:15:31,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 228 transitions, 3272 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-11-25 17:15:31,649 INFO L231 Difference]: Finished difference. Result has 144 places, 203 transitions, 2876 flow [2022-11-25 17:15:31,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2876, PETRI_PLACES=144, PETRI_TRANSITIONS=203} [2022-11-25 17:15:31,650 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2022-11-25 17:15:31,650 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 203 transitions, 2876 flow [2022-11-25 17:15:31,651 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 17:15:31,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:31,651 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:31,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:31,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:15:31,863 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 17:15:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2091951949, now seen corresponding path program 6 times [2022-11-25 17:15:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:31,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313727257] [2022-11-25 17:15:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:32,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:32,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313727257] [2022-11-25 17:15:32,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313727257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:32,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236590846] [2022-11-25 17:15:32,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:15:32,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:32,187 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:32,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:15:32,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:15:32,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:32,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:15:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:32,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:15:32,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:32,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-25 17:15:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:32,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:32,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:32,759 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 139 treesize of output 135 [2022-11-25 17:15:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:33,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236590846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:33,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:33,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2022-11-25 17:15:33,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914020700] [2022-11-25 17:15:33,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:33,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:15:33,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:15:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:15:35,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 375 [2022-11-25 17:15:35,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 203 transitions, 2876 flow. Second operand has 22 states, 22 states have (on average 131.0909090909091) internal successors, (2884), 22 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 17:15:35,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:35,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 375 [2022-11-25 17:15:35,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:39,856 INFO L130 PetriNetUnfolder]: 984/1901 cut-off events. [2022-11-25 17:15:39,856 INFO L131 PetriNetUnfolder]: For 15135/15135 co-relation queries the response was YES. [2022-11-25 17:15:39,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11128 conditions, 1901 events. 984/1901 cut-off events. For 15135/15135 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 11989 event pairs, 48 based on Foata normal form. 107/2007 useless extension candidates. Maximal degree in co-relation 10889. Up to 501 conditions per place. [2022-11-25 17:15:39,875 INFO L137 encePairwiseOnDemand]: 365/375 looper letters, 216 selfloop transitions, 123 changer transitions 178/517 dead transitions. [2022-11-25 17:15:39,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 517 transitions, 6504 flow [2022-11-25 17:15:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 17:15:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-25 17:15:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 7408 transitions. [2022-11-25 17:15:39,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3591757575757576 [2022-11-25 17:15:39,887 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 7408 transitions. [2022-11-25 17:15:39,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 7408 transitions. [2022-11-25 17:15:39,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:39,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 7408 transitions. [2022-11-25 17:15:39,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 134.6909090909091) internal successors, (7408), 55 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states 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 17:15:39,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 375.0) internal successors, (21000), 56 states have internal predecessors, (21000), 0 states have call successors, (0), 0 states 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 17:15:39,929 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 375.0) internal successors, (21000), 56 states have internal predecessors, (21000), 0 states have call successors, (0), 0 states 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 17:15:39,929 INFO L175 Difference]: Start difference. First operand has 144 places, 203 transitions, 2876 flow. Second operand 55 states and 7408 transitions. [2022-11-25 17:15:39,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 517 transitions, 6504 flow [2022-11-25 17:15:40,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 517 transitions, 6407 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-25 17:15:40,072 INFO L231 Difference]: Finished difference. Result has 213 places, 202 transitions, 3192 flow [2022-11-25 17:15:40,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=3192, PETRI_PLACES=213, PETRI_TRANSITIONS=202} [2022-11-25 17:15:40,073 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 192 predicate places. [2022-11-25 17:15:40,073 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 202 transitions, 3192 flow [2022-11-25 17:15:40,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 131.0909090909091) internal successors, (2884), 22 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 17:15:40,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:40,075 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 17:15:40,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:40,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:40,281 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 17:15:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 427979503, now seen corresponding path program 1 times [2022-11-25 17:15:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:40,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503890134] [2022-11-25 17:15:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:40,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:40,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:40,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503890134] [2022-11-25 17:15:40,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503890134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:40,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286019083] [2022-11-25 17:15:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:40,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:40,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:40,487 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:40,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:15:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:40,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:15:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:40,956 INFO L321 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-11-25 17:15:40,956 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 158 [2022-11-25 17:15:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:41,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:41,311 INFO L321 Elim1Store]: treesize reduction 5, result has 86.5 percent of original size [2022-11-25 17:15:41,312 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 50 treesize of output 49 [2022-11-25 17:15:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:41,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286019083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:41,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:41,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-25 17:15:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062118534] [2022-11-25 17:15:41,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:41,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:15:41,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:15:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:15:43,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 375 [2022-11-25 17:15:43,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 202 transitions, 3192 flow. Second operand has 17 states, 17 states have (on average 123.70588235294117) internal successors, (2103), 17 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states 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 17:15:43,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:43,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 375 [2022-11-25 17:15:43,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:44,491 INFO L130 PetriNetUnfolder]: 715/1339 cut-off events. [2022-11-25 17:15:44,491 INFO L131 PetriNetUnfolder]: For 20861/20861 co-relation queries the response was YES. [2022-11-25 17:15:44,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9589 conditions, 1339 events. 715/1339 cut-off events. For 20861/20861 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7396 event pairs, 102 based on Foata normal form. 34/1372 useless extension candidates. Maximal degree in co-relation 9486. Up to 622 conditions per place. [2022-11-25 17:15:44,509 INFO L137 encePairwiseOnDemand]: 364/375 looper letters, 130 selfloop transitions, 76 changer transitions 81/287 dead transitions. [2022-11-25 17:15:44,509 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 287 transitions, 4535 flow [2022-11-25 17:15:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:15:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:15:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2422 transitions. [2022-11-25 17:15:44,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3399298245614035 [2022-11-25 17:15:44,517 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2422 transitions. [2022-11-25 17:15:44,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2422 transitions. [2022-11-25 17:15:44,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:44,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2422 transitions. [2022-11-25 17:15:44,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 127.47368421052632) internal successors, (2422), 19 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states 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 17:15:44,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 375.0) internal successors, (7500), 20 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states 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 17:15:44,530 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 375.0) internal successors, (7500), 20 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states 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 17:15:44,530 INFO L175 Difference]: Start difference. First operand has 213 places, 202 transitions, 3192 flow. Second operand 19 states and 2422 transitions. [2022-11-25 17:15:44,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 287 transitions, 4535 flow [2022-11-25 17:15:44,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 287 transitions, 3973 flow, removed 136 selfloop flow, removed 32 redundant places. [2022-11-25 17:15:44,687 INFO L231 Difference]: Finished difference. Result has 181 places, 178 transitions, 2638 flow [2022-11-25 17:15:44,688 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2638, PETRI_PLACES=181, PETRI_TRANSITIONS=178} [2022-11-25 17:15:44,688 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 160 predicate places. [2022-11-25 17:15:44,688 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 178 transitions, 2638 flow [2022-11-25 17:15:44,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 123.70588235294117) internal successors, (2103), 17 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states 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 17:15:44,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:44,689 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:44,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:44,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:15:44,895 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 17:15:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:44,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1081187046, now seen corresponding path program 2 times [2022-11-25 17:15:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976617209] [2022-11-25 17:15:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:45,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:45,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976617209] [2022-11-25 17:15:45,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976617209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:45,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535635926] [2022-11-25 17:15:45,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:15:45,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:45,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:45,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:45,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:15:45,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:45,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:15:45,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:45,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535635926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:45,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:45,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-25 17:15:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261008167] [2022-11-25 17:15:45,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:45,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:15:45,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:15:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:15:45,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2022-11-25 17:15:45,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 178 transitions, 2638 flow. Second operand has 11 states, 11 states have (on average 151.27272727272728) internal successors, (1664), 11 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 17:15:45,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:45,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2022-11-25 17:15:45,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:46,546 INFO L130 PetriNetUnfolder]: 552/1038 cut-off events. [2022-11-25 17:15:46,547 INFO L131 PetriNetUnfolder]: For 12396/12396 co-relation queries the response was YES. [2022-11-25 17:15:46,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6811 conditions, 1038 events. 552/1038 cut-off events. For 12396/12396 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5442 event pairs, 97 based on Foata normal form. 16/1053 useless extension candidates. Maximal degree in co-relation 6717. Up to 436 conditions per place. [2022-11-25 17:15:46,556 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 139 selfloop transitions, 101 changer transitions 1/241 dead transitions. [2022-11-25 17:15:46,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 3493 flow [2022-11-25 17:15:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:15:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:15:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2321 transitions. [2022-11-25 17:15:46,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4126222222222222 [2022-11-25 17:15:46,563 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2321 transitions. [2022-11-25 17:15:46,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2321 transitions. [2022-11-25 17:15:46,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:46,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2321 transitions. [2022-11-25 17:15:46,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 154.73333333333332) internal successors, (2321), 15 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states 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 17:15:46,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states 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 17:15:46,573 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states 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 17:15:46,574 INFO L175 Difference]: Start difference. First operand has 181 places, 178 transitions, 2638 flow. Second operand 15 states and 2321 transitions. [2022-11-25 17:15:46,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 3493 flow [2022-11-25 17:15:46,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 241 transitions, 3322 flow, removed 33 selfloop flow, removed 18 redundant places. [2022-11-25 17:15:46,650 INFO L231 Difference]: Finished difference. Result has 167 places, 195 transitions, 2879 flow [2022-11-25 17:15:46,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2879, PETRI_PLACES=167, PETRI_TRANSITIONS=195} [2022-11-25 17:15:46,651 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2022-11-25 17:15:46,651 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 195 transitions, 2879 flow [2022-11-25 17:15:46,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 151.27272727272728) internal successors, (1664), 11 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 17:15:46,652 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:46,652 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:46,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:46,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:15:46,858 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 17:15:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:46,859 INFO L85 PathProgramCache]: Analyzing trace with hash -895690050, now seen corresponding path program 3 times [2022-11-25 17:15:46,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343840128] [2022-11-25 17:15:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:46,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:47,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:47,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343840128] [2022-11-25 17:15:47,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343840128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:47,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033398835] [2022-11-25 17:15:47,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:15:47,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:47,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:47,106 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:47,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:15:47,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:15:47,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:15:47,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:47,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:47,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033398835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:47,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:47,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:15:47,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104452547] [2022-11-25 17:15:47,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:47,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:15:47,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:15:47,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:15:47,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2022-11-25 17:15:47,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 195 transitions, 2879 flow. Second operand has 12 states, 12 states have (on average 151.33333333333334) internal successors, (1816), 12 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 17:15:47,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:47,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2022-11-25 17:15:47,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:49,024 INFO L130 PetriNetUnfolder]: 628/1200 cut-off events. [2022-11-25 17:15:49,025 INFO L131 PetriNetUnfolder]: For 11944/11944 co-relation queries the response was YES. [2022-11-25 17:15:49,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7800 conditions, 1200 events. 628/1200 cut-off events. For 11944/11944 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6657 event pairs, 153 based on Foata normal form. 20/1219 useless extension candidates. Maximal degree in co-relation 7516. Up to 657 conditions per place. [2022-11-25 17:15:49,035 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 184 selfloop transitions, 117 changer transitions 2/303 dead transitions. [2022-11-25 17:15:49,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 303 transitions, 4356 flow [2022-11-25 17:15:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:15:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:15:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2959 transitions. [2022-11-25 17:15:49,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4152982456140351 [2022-11-25 17:15:49,040 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2959 transitions. [2022-11-25 17:15:49,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2959 transitions. [2022-11-25 17:15:49,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:49,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2959 transitions. [2022-11-25 17:15:49,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 155.73684210526315) internal successors, (2959), 19 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states 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 17:15:49,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 375.0) internal successors, (7500), 20 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states 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 17:15:49,053 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 375.0) internal successors, (7500), 20 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states 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 17:15:49,053 INFO L175 Difference]: Start difference. First operand has 167 places, 195 transitions, 2879 flow. Second operand 19 states and 2959 transitions. [2022-11-25 17:15:49,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 303 transitions, 4356 flow [2022-11-25 17:15:49,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 303 transitions, 4233 flow, removed 36 selfloop flow, removed 2 redundant places. [2022-11-25 17:15:49,140 INFO L231 Difference]: Finished difference. Result has 192 places, 234 transitions, 3736 flow [2022-11-25 17:15:49,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3736, PETRI_PLACES=192, PETRI_TRANSITIONS=234} [2022-11-25 17:15:49,140 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2022-11-25 17:15:49,141 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 234 transitions, 3736 flow [2022-11-25 17:15:49,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.33333333333334) internal successors, (1816), 12 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 17:15:49,141 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:49,141 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:49,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:49,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:15:49,347 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 17:15:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:49,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1195724640, now seen corresponding path program 4 times [2022-11-25 17:15:49,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:49,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098260952] [2022-11-25 17:15:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:49,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:49,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098260952] [2022-11-25 17:15:49,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098260952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:49,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671802753] [2022-11-25 17:15:49,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:15:49,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:49,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:49,661 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:49,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:15:49,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:15:49,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:49,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:15:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:49,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:50,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671802753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:50,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:50,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:15:50,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258761159] [2022-11-25 17:15:50,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:50,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:15:50,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:15:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:15:50,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2022-11-25 17:15:50,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 234 transitions, 3736 flow. Second operand has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 17:15:50,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:50,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2022-11-25 17:15:50,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:51,467 INFO L130 PetriNetUnfolder]: 634/1184 cut-off events. [2022-11-25 17:15:51,467 INFO L131 PetriNetUnfolder]: For 12666/12666 co-relation queries the response was YES. [2022-11-25 17:15:51,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8227 conditions, 1184 events. 634/1184 cut-off events. For 12666/12666 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6401 event pairs, 155 based on Foata normal form. 8/1191 useless extension candidates. Maximal degree in co-relation 8126. Up to 663 conditions per place. [2022-11-25 17:15:51,479 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 163 selfloop transitions, 119 changer transitions 1/283 dead transitions. [2022-11-25 17:15:51,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 283 transitions, 4535 flow [2022-11-25 17:15:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:15:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:15:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2490 transitions. [2022-11-25 17:15:51,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.415 [2022-11-25 17:15:51,485 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2490 transitions. [2022-11-25 17:15:51,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2490 transitions. [2022-11-25 17:15:51,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:51,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2490 transitions. [2022-11-25 17:15:51,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.625) internal successors, (2490), 16 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states 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 17:15:51,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states 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 17:15:51,497 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 375.0) internal successors, (6375), 17 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states 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 17:15:51,497 INFO L175 Difference]: Start difference. First operand has 192 places, 234 transitions, 3736 flow. Second operand 16 states and 2490 transitions. [2022-11-25 17:15:51,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 283 transitions, 4535 flow [2022-11-25 17:15:51,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 283 transitions, 4392 flow, removed 47 selfloop flow, removed 6 redundant places. [2022-11-25 17:15:51,605 INFO L231 Difference]: Finished difference. Result has 200 places, 238 transitions, 3940 flow [2022-11-25 17:15:51,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3940, PETRI_PLACES=200, PETRI_TRANSITIONS=238} [2022-11-25 17:15:51,606 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 179 predicate places. [2022-11-25 17:15:51,606 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 238 transitions, 3940 flow [2022-11-25 17:15:51,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 17:15:51,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:51,606 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:51,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:51,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:15:51,807 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 17:15:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1090094584, now seen corresponding path program 5 times [2022-11-25 17:15:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:51,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421798129] [2022-11-25 17:15:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:51,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:52,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:52,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421798129] [2022-11-25 17:15:52,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421798129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164091017] [2022-11-25 17:15:52,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:15:52,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:52,068 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:52,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:15:52,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:52,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:52,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:15:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:52,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:52,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164091017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:52,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:52,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:15:52,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214944] [2022-11-25 17:15:52,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:52,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:15:52,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:15:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:15:52,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2022-11-25 17:15:52,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 238 transitions, 3940 flow. Second operand has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 17:15:52,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:52,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2022-11-25 17:15:52,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:53,780 INFO L130 PetriNetUnfolder]: 696/1300 cut-off events. [2022-11-25 17:15:53,780 INFO L131 PetriNetUnfolder]: For 13217/13217 co-relation queries the response was YES. [2022-11-25 17:15:53,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9154 conditions, 1300 events. 696/1300 cut-off events. For 13217/13217 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7178 event pairs, 125 based on Foata normal form. 10/1309 useless extension candidates. Maximal degree in co-relation 8998. Up to 689 conditions per place. [2022-11-25 17:15:53,797 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 181 selfloop transitions, 125 changer transitions 0/306 dead transitions. [2022-11-25 17:15:53,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 306 transitions, 5186 flow [2022-11-25 17:15:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:15:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:15:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2183 transitions. [2022-11-25 17:15:53,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4158095238095238 [2022-11-25 17:15:53,801 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2183 transitions. [2022-11-25 17:15:53,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2183 transitions. [2022-11-25 17:15:53,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:53,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2183 transitions. [2022-11-25 17:15:53,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 155.92857142857142) internal successors, (2183), 14 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states 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 17:15:53,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states 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 17:15:53,810 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 375.0) internal successors, (5625), 15 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states 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 17:15:53,810 INFO L175 Difference]: Start difference. First operand has 200 places, 238 transitions, 3940 flow. Second operand 14 states and 2183 transitions. [2022-11-25 17:15:53,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 306 transitions, 5186 flow [2022-11-25 17:15:53,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 306 transitions, 5020 flow, removed 17 selfloop flow, removed 8 redundant places. [2022-11-25 17:15:53,940 INFO L231 Difference]: Finished difference. Result has 210 places, 259 transitions, 4554 flow [2022-11-25 17:15:53,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=3774, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4554, PETRI_PLACES=210, PETRI_TRANSITIONS=259} [2022-11-25 17:15:53,942 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2022-11-25 17:15:53,942 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 259 transitions, 4554 flow [2022-11-25 17:15:53,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 17:15:53,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:53,943 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:53,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:54,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:54,148 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 17:15:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1113458022, now seen corresponding path program 6 times [2022-11-25 17:15:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:54,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467709848] [2022-11-25 17:15:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:54,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:54,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467709848] [2022-11-25 17:15:54,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467709848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835809676] [2022-11-25 17:15:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:15:54,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:54,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:54,415 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:54,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:15:54,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:15:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:15:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:54,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:15:55,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835809676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:15:55,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:15:55,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:15:55,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523864895] [2022-11-25 17:15:55,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:15:55,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:15:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:15:55,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:15:55,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 375 [2022-11-25 17:15:55,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 259 transitions, 4554 flow. Second operand has 12 states, 12 states have (on average 151.33333333333334) internal successors, (1816), 12 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 17:15:55,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:55,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 375 [2022-11-25 17:15:55,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:56,262 INFO L130 PetriNetUnfolder]: 694/1300 cut-off events. [2022-11-25 17:15:56,262 INFO L131 PetriNetUnfolder]: For 15470/15470 co-relation queries the response was YES. [2022-11-25 17:15:56,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9602 conditions, 1300 events. 694/1300 cut-off events. For 15470/15470 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7191 event pairs, 125 based on Foata normal form. 16/1315 useless extension candidates. Maximal degree in co-relation 9463. Up to 705 conditions per place. [2022-11-25 17:15:56,276 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 179 selfloop transitions, 126 changer transitions 0/305 dead transitions. [2022-11-25 17:15:56,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 305 transitions, 5446 flow [2022-11-25 17:15:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:15:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:15:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2326 transitions. [2022-11-25 17:15:56,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4135111111111111 [2022-11-25 17:15:56,281 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2326 transitions. [2022-11-25 17:15:56,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2326 transitions. [2022-11-25 17:15:56,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:56,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2326 transitions. [2022-11-25 17:15:56,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 155.06666666666666) internal successors, (2326), 15 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 17:15:56,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states 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 17:15:56,290 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 375.0) internal successors, (6000), 16 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states 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 17:15:56,291 INFO L175 Difference]: Start difference. First operand has 210 places, 259 transitions, 4554 flow. Second operand 15 states and 2326 transitions. [2022-11-25 17:15:56,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 305 transitions, 5446 flow [2022-11-25 17:15:56,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 305 transitions, 5285 flow, removed 38 selfloop flow, removed 5 redundant places. [2022-11-25 17:15:56,442 INFO L231 Difference]: Finished difference. Result has 221 places, 265 transitions, 4758 flow [2022-11-25 17:15:56,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4758, PETRI_PLACES=221, PETRI_TRANSITIONS=265} [2022-11-25 17:15:56,443 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2022-11-25 17:15:56,443 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 265 transitions, 4758 flow [2022-11-25 17:15:56,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.33333333333334) internal successors, (1816), 12 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 17:15:56,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:56,444 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:56,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:15:56,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:56,650 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 17:15:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1501911699, now seen corresponding path program 2 times [2022-11-25 17:15:56,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:56,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93629465] [2022-11-25 17:15:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:56,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:15:57,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:57,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93629465] [2022-11-25 17:15:57,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93629465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:15:57,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525873648] [2022-11-25 17:15:57,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:15:57,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:15:57,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:57,491 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:15:57,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:15:57,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:15:57,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:15:57,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:15:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:15:57,704 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 17:15:57,771 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 17:15:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:15:57,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:15:58,361 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 17:15:58,361 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 41 treesize of output 21 [2022-11-25 17:15:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:15:58,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:15:59,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:59,642 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 157 treesize of output 97 [2022-11-25 17:15:59,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:59,725 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 364 treesize of output 418 [2022-11-25 17:15:59,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:59,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 234 [2022-11-25 17:15:59,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:15:59,891 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 288 treesize of output 324 [2022-11-25 17:16:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:16:03,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525873648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:16:03,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:16:03,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2022-11-25 17:16:03,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349166636] [2022-11-25 17:16:03,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:03,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 17:16:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 17:16:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=898, Unknown=2, NotChecked=0, Total=1056 [2022-11-25 17:16:05,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 375 [2022-11-25 17:16:05,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 265 transitions, 4758 flow. Second operand has 33 states, 33 states have (on average 99.51515151515152) internal successors, (3284), 33 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states 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 17:16:05,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:05,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 375 [2022-11-25 17:16:05,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:13,061 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 108 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:16:13,980 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~x1~0 4) c_~f~0.offset)) (.cse28 (select |c_#memory_int| c_~f~0.base)) (.cse3 (+ (* c_~x2~0 4) c_~f~0.offset))) (let ((.cse25 (select .cse28 (+ (* (select .cse28 .cse3) 4) c_~f~0.offset))) (.cse24 (select .cse28 .cse4))) (let ((.cse12 (+ c_~f~0.offset (* .cse24 4))) (.cse23 (select .cse28 (+ c_~f~0.offset (* 4 .cse25)))) (.cse27 (mod (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) 4294967296))) (let ((.cse20 (< 2 (mod c_~n~0 4294967296))) (.cse19 (< 2 (mod (+ 4294967295 c_~n~0) 4294967296))) (.cse21 (= c_~x1~0 .cse25)) (.cse0 (< c_~x1~0 0)) (.cse5 (< .cse27 3)) (.cse1 (< .cse27 1)) (.cse8 (<= c_~size~0 c_~x1~0)) (.cse22 (mod |c_thread1Thread1of1ForFork1_~i~0#1| 4294967296)) (.cse16 (< .cse25 0)) (.cse17 (<= c_~size~0 .cse25)) (.cse18 (= .cse23 c_~x1~0)) (.cse13 (forall ((v_ArrVal_552 (Array Int Int))) (let ((.cse26 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_552) c_~f~0.base))) (= (select .cse26 (+ (* (select .cse26 .cse3) 4) c_~f~0.offset)) (select .cse26 .cse12))))) (.cse14 (<= c_~size~0 .cse24)) (.cse15 (< .cse24 0))) (and (or .cse0 (and (or .cse1 (forall ((v_ArrVal_552 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_552) c_~f~0.base))) (= (select .cse2 (+ (* (select .cse2 .cse3) 4) c_~f~0.offset)) (select .cse2 .cse4))))) (or .cse5 (forall ((v_ArrVal_552 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_552) c_~f~0.base))) (let ((.cse6 (select .cse7 (+ (* (select .cse7 .cse3) 4) c_~f~0.offset)))) (or (< .cse6 0) (<= c_~size~0 .cse6) (= (select .cse7 .cse4) (select .cse7 (+ c_~f~0.offset (* .cse6 4)))))))))) .cse8) (or (let ((.cse9 (mod (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|) 4294967296))) (and (or (< .cse9 3) (forall ((v_ArrVal_552 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_552) c_~f~0.base))) (let ((.cse10 (select .cse11 (+ (* (select .cse11 .cse3) 4) c_~f~0.offset)))) (or (< .cse10 0) (<= c_~size~0 .cse10) (= (select .cse11 (+ c_~f~0.offset (* .cse10 4))) (select .cse11 .cse12))))))) (or .cse13 (< .cse9 1)))) .cse14 .cse15) (or .cse16 .cse17 .cse18 .cse19 (not .cse20)) (or .cse20 .cse21 .cse19) (or .cse21 (< .cse22 1)) (or .cse0 (and (or .cse5 .cse16 (= .cse23 .cse24) .cse17) (or .cse1 (= .cse24 .cse25))) .cse8) (or (< .cse22 3) .cse16 .cse17 .cse18) (or .cse13 .cse14 .cse15)))))) is different from false [2022-11-25 17:16:17,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:16:20,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:16:27,700 INFO L130 PetriNetUnfolder]: 1154/2159 cut-off events. [2022-11-25 17:16:27,700 INFO L131 PetriNetUnfolder]: For 30664/30664 co-relation queries the response was YES. [2022-11-25 17:16:27,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16195 conditions, 2159 events. 1154/2159 cut-off events. For 30664/30664 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 13454 event pairs, 69 based on Foata normal form. 14/2172 useless extension candidates. Maximal degree in co-relation 16054. Up to 1176 conditions per place. [2022-11-25 17:16:27,721 INFO L137 encePairwiseOnDemand]: 362/375 looper letters, 268 selfloop transitions, 188 changer transitions 77/533 dead transitions. [2022-11-25 17:16:27,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 533 transitions, 8679 flow [2022-11-25 17:16:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 17:16:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-25 17:16:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4672 transitions. [2022-11-25 17:16:27,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.27685925925925925 [2022-11-25 17:16:27,729 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4672 transitions. [2022-11-25 17:16:27,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4672 transitions. [2022-11-25 17:16:27,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:27,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4672 transitions. [2022-11-25 17:16:27,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 103.82222222222222) internal successors, (4672), 45 states have internal predecessors, (4672), 0 states have call successors, (0), 0 states 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 17:16:27,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 375.0) internal successors, (17250), 46 states have internal predecessors, (17250), 0 states have call successors, (0), 0 states 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 17:16:27,753 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 375.0) internal successors, (17250), 46 states have internal predecessors, (17250), 0 states have call successors, (0), 0 states 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 17:16:27,754 INFO L175 Difference]: Start difference. First operand has 221 places, 265 transitions, 4758 flow. Second operand 45 states and 4672 transitions. [2022-11-25 17:16:27,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 533 transitions, 8679 flow [2022-11-25 17:16:28,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 533 transitions, 8348 flow, removed 26 selfloop flow, removed 9 redundant places. [2022-11-25 17:16:28,083 INFO L231 Difference]: Finished difference. Result has 276 places, 360 transitions, 6688 flow [2022-11-25 17:16:28,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=6688, PETRI_PLACES=276, PETRI_TRANSITIONS=360} [2022-11-25 17:16:28,084 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2022-11-25 17:16:28,084 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 360 transitions, 6688 flow [2022-11-25 17:16:28,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 99.51515151515152) internal successors, (3284), 33 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states 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 17:16:28,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:28,085 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:28,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:28,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:28,285 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 17:16:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2020510646, now seen corresponding path program 7 times [2022-11-25 17:16:28,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:28,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108435418] [2022-11-25 17:16:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:28,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:16:28,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:28,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108435418] [2022-11-25 17:16:28,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108435418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:28,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880744067] [2022-11-25 17:16:28,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:16:28,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:28,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:28,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:16:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:28,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:16:28,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:16:28,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:16:28,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880744067] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:28,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:16:28,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 10 [2022-11-25 17:16:28,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724251409] [2022-11-25 17:16:28,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:28,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:16:28,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:16:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:16:29,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 375 [2022-11-25 17:16:29,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 360 transitions, 6688 flow. Second operand has 5 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states 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 17:16:29,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:29,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 375 [2022-11-25 17:16:29,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:16:29,810 INFO L130 PetriNetUnfolder]: 1001/1879 cut-off events. [2022-11-25 17:16:29,811 INFO L131 PetriNetUnfolder]: For 39755/39755 co-relation queries the response was YES. [2022-11-25 17:16:29,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16288 conditions, 1879 events. 1001/1879 cut-off events. For 39755/39755 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11272 event pairs, 157 based on Foata normal form. 6/1884 useless extension candidates. Maximal degree in co-relation 16126. Up to 857 conditions per place. [2022-11-25 17:16:29,829 INFO L137 encePairwiseOnDemand]: 369/375 looper letters, 283 selfloop transitions, 133 changer transitions 13/429 dead transitions. [2022-11-25 17:16:29,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 429 transitions, 8738 flow [2022-11-25 17:16:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:16:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:16:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 941 transitions. [2022-11-25 17:16:29,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4182222222222222 [2022-11-25 17:16:29,832 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 941 transitions. [2022-11-25 17:16:29,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 941 transitions. [2022-11-25 17:16:29,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:16:29,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 941 transitions. [2022-11-25 17:16:29,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.83333333333334) internal successors, (941), 6 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:16:29,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 17:16:29,837 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 375.0) internal successors, (2625), 7 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states 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 17:16:29,837 INFO L175 Difference]: Start difference. First operand has 276 places, 360 transitions, 6688 flow. Second operand 6 states and 941 transitions. [2022-11-25 17:16:29,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 429 transitions, 8738 flow [2022-11-25 17:16:30,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 429 transitions, 8283 flow, removed 166 selfloop flow, removed 24 redundant places. [2022-11-25 17:16:30,148 INFO L231 Difference]: Finished difference. Result has 251 places, 378 transitions, 7030 flow [2022-11-25 17:16:30,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=6318, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7030, PETRI_PLACES=251, PETRI_TRANSITIONS=378} [2022-11-25 17:16:30,149 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2022-11-25 17:16:30,149 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 378 transitions, 7030 flow [2022-11-25 17:16:30,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states 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 17:16:30,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:30,150 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:30,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-25 17:16:30,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:30,351 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 17:16:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:30,352 INFO L85 PathProgramCache]: Analyzing trace with hash 86072140, now seen corresponding path program 8 times [2022-11-25 17:16:30,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:30,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497587683] [2022-11-25 17:16:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:30,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:30,623 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 17:16:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497587683] [2022-11-25 17:16:30,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497587683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:30,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255300053] [2022-11-25 17:16:30,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:16:30,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:30,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:30,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:30,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b4e7011-d0fc-4d18-945c-d3ad33f5d21d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:16:30,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:16:30,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:16:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:16:30,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:16:30,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:48,091 WARN L233 SmtUtils]: Spent 16.64s on a formula simplification. DAG size of input: 5023 DAG size of output: 4690 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)