./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:05:14,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:05:14,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:05:14,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:05:14,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:05:14,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:05:14,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:05:14,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:05:14,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:05:14,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:05:14,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:05:14,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:05:14,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:05:14,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:05:14,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:05:14,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:05:14,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:05:14,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:05:14,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:05:14,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:05:14,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:05:14,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:05:14,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:05:14,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:05:14,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:05:14,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:05:14,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:05:14,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:05:14,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:05:14,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:05:14,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:05:14,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:05:14,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:05:14,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:05:14,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:05:14,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:05:14,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:05:14,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:05:14,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:05:14,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:05:14,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:05:14,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:05:14,352 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:05:14,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:05:14,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:05:14,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:05:14,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:05:14,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:05:14,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:05:14,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:05:14,356 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:05:14,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:05:14,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:05:14,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:05:14,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:05:14,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:05:14,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:05:14,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:05:14,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:05:14,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:05:14,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:05:14,358 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:05:14,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:05:14,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:05:14,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:05:14,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:05:14,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:05:14,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:05:14,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:05:14,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:05:14,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:05:14,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:05:14,360 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:05:14,360 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:05:14,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:05:14,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-16 12:05:14,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:05:14,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:05:14,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:05:14,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:05:14,679 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:05:14,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-16 12:05:14,756 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/data/0c9a81bb9/ce6831fe572c4d5184fcdd621f9a5edc/FLAGe667572b6 [2022-11-16 12:05:15,203 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:05:15,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-16 12:05:15,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/data/0c9a81bb9/ce6831fe572c4d5184fcdd621f9a5edc/FLAGe667572b6 [2022-11-16 12:05:15,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/data/0c9a81bb9/ce6831fe572c4d5184fcdd621f9a5edc [2022-11-16 12:05:15,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:05:15,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:05:15,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:05:15,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:05:15,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:05:15,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:15,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d042ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15, skipping insertion in model container [2022-11-16 12:05:15,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:15,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:05:15,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:05:15,855 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-16 12:05:15,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:05:15,870 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:05:15,893 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-16 12:05:15,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:05:15,909 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:05:15,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15 WrapperNode [2022-11-16 12:05:15,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:05:15,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:05:15,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:05:15,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:05:15,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:15,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:15,970 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2022-11-16 12:05:15,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:05:15,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:05:15,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:05:15,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:05:15,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:15,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:15,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:15,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:15,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:16,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:16,003 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:16,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:16,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:05:16,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:05:16,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:05:16,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:05:16,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (1/1) ... [2022-11-16 12:05:16,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:05:16,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:16,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:05:16,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:05:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:05:16,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:05:16,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:05:16,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:05:16,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:05:16,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:05:16,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:05:16,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:05:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:05:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:05:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:05:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:05:16,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:05:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:05:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:05:16,089 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:05:16,194 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:05:16,196 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:05:16,680 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:05:16,867 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:05:16,867 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 12:05:16,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:05:16 BoogieIcfgContainer [2022-11-16 12:05:16,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:05:16,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:05:16,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:05:16,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:05:16,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:05:15" (1/3) ... [2022-11-16 12:05:16,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324c35e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:05:16, skipping insertion in model container [2022-11-16 12:05:16,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:15" (2/3) ... [2022-11-16 12:05:16,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324c35e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:05:16, skipping insertion in model container [2022-11-16 12:05:16,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:05:16" (3/3) ... [2022-11-16 12:05:16,881 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-11-16 12:05:16,893 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:05:16,904 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:05:16,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:05:16,904 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:05:17,007 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:05:17,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 346 flow [2022-11-16 12:05:17,141 INFO L130 PetriNetUnfolder]: 13/163 cut-off events. [2022-11-16 12:05:17,141 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:05:17,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-16 12:05:17,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 346 flow [2022-11-16 12:05:17,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 154 transitions, 320 flow [2022-11-16 12:05:17,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:05:17,167 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;@43b40a78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:05:17,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:05:17,205 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2022-11-16 12:05:17,205 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:05:17,205 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:17,206 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:17,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1165910738, now seen corresponding path program 1 times [2022-11-16 12:05:17,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:17,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009454692] [2022-11-16 12:05:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:17,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:17,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009454692] [2022-11-16 12:05:17,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009454692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:17,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:17,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:17,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523681420] [2022-11-16 12:05:17,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:17,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:05:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:05:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:05:17,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 165 [2022-11-16 12:05:17,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 320 flow. Second operand has 2 states, 2 states have (on average 153.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:17,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:17,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 165 [2022-11-16 12:05:17,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:17,717 INFO L130 PetriNetUnfolder]: 13/178 cut-off events. [2022-11-16 12:05:17,717 INFO L131 PetriNetUnfolder]: For 22/23 co-relation queries the response was YES. [2022-11-16 12:05:17,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 178 events. 13/178 cut-off events. For 22/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 3 based on Foata normal form. 16/181 useless extension candidates. Maximal degree in co-relation 123. Up to 19 conditions per place. [2022-11-16 12:05:17,722 INFO L137 encePairwiseOnDemand]: 156/165 looper letters, 6 selfloop transitions, 0 changer transitions 5/145 dead transitions. [2022-11-16 12:05:17,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 145 transitions, 314 flow [2022-11-16 12:05:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:05:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:05:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 313 transitions. [2022-11-16 12:05:17,746 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9484848484848485 [2022-11-16 12:05:17,747 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 313 transitions. [2022-11-16 12:05:17,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 313 transitions. [2022-11-16 12:05:17,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:17,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 313 transitions. [2022-11-16 12:05:17,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:17,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:17,768 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:17,770 INFO L175 Difference]: Start difference. First operand has 148 places, 154 transitions, 320 flow. Second operand 2 states and 313 transitions. [2022-11-16 12:05:17,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 145 transitions, 314 flow [2022-11-16 12:05:17,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 145 transitions, 306 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:05:17,784 INFO L231 Difference]: Finished difference. Result has 145 places, 140 transitions, 284 flow [2022-11-16 12:05:17,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=145, PETRI_TRANSITIONS=140} [2022-11-16 12:05:17,790 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -3 predicate places. [2022-11-16 12:05:17,791 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 140 transitions, 284 flow [2022-11-16 12:05:17,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 153.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:17,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:17,792 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:05:17,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:17,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1994540390, now seen corresponding path program 1 times [2022-11-16 12:05:17,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:17,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467846114] [2022-11-16 12:05:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:17,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:18,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467846114] [2022-11-16 12:05:18,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467846114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:18,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:18,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:05:18,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874175130] [2022-11-16 12:05:18,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:05:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:05:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:05:18,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 165 [2022-11-16 12:05:18,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 140 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:18,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 165 [2022-11-16 12:05:18,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:18,407 INFO L130 PetriNetUnfolder]: 14/189 cut-off events. [2022-11-16 12:05:18,408 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:05:18,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 189 events. 14/189 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 240 event pairs, 0 based on Foata normal form. 1/182 useless extension candidates. Maximal degree in co-relation 238. Up to 23 conditions per place. [2022-11-16 12:05:18,410 INFO L137 encePairwiseOnDemand]: 159/165 looper letters, 28 selfloop transitions, 3 changer transitions 4/148 dead transitions. [2022-11-16 12:05:18,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 148 transitions, 373 flow [2022-11-16 12:05:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:05:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:05:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 651 transitions. [2022-11-16 12:05:18,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7890909090909091 [2022-11-16 12:05:18,413 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 651 transitions. [2022-11-16 12:05:18,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 651 transitions. [2022-11-16 12:05:18,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:18,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 651 transitions. [2022-11-16 12:05:18,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,419 INFO L175 Difference]: Start difference. First operand has 145 places, 140 transitions, 284 flow. Second operand 5 states and 651 transitions. [2022-11-16 12:05:18,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 148 transitions, 373 flow [2022-11-16 12:05:18,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 148 transitions, 373 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:18,423 INFO L231 Difference]: Finished difference. Result has 147 places, 142 transitions, 307 flow [2022-11-16 12:05:18,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2022-11-16 12:05:18,425 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -1 predicate places. [2022-11-16 12:05:18,425 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 307 flow [2022-11-16 12:05:18,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,426 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:18,426 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:18,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:05:18,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash 353416500, now seen corresponding path program 1 times [2022-11-16 12:05:18,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:18,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981608626] [2022-11-16 12:05:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:18,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:18,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981608626] [2022-11-16 12:05:18,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981608626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401998624] [2022-11-16 12:05:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:18,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:18,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:18,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:18,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:05:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:18,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:05:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:19,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:19,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401998624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:19,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:05:19,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-16 12:05:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756314252] [2022-11-16 12:05:19,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:05:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:05:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:05:19,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-11-16 12:05:19,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:19,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-11-16 12:05:19,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:19,627 INFO L130 PetriNetUnfolder]: 15/265 cut-off events. [2022-11-16 12:05:19,627 INFO L131 PetriNetUnfolder]: For 28/31 co-relation queries the response was YES. [2022-11-16 12:05:19,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 265 events. 15/265 cut-off events. For 28/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 506 event pairs, 2 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 363. Up to 37 conditions per place. [2022-11-16 12:05:19,630 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 31 selfloop transitions, 9 changer transitions 17/163 dead transitions. [2022-11-16 12:05:19,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 163 transitions, 467 flow [2022-11-16 12:05:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:05:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 12:05:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1267 transitions. [2022-11-16 12:05:19,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7678787878787878 [2022-11-16 12:05:19,634 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1267 transitions. [2022-11-16 12:05:19,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1267 transitions. [2022-11-16 12:05:19,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:19,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1267 transitions. [2022-11-16 12:05:19,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.7) internal successors, (1267), 10 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,643 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,643 INFO L175 Difference]: Start difference. First operand has 147 places, 142 transitions, 307 flow. Second operand 10 states and 1267 transitions. [2022-11-16 12:05:19,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 163 transitions, 467 flow [2022-11-16 12:05:19,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 163 transitions, 460 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 12:05:19,648 INFO L231 Difference]: Finished difference. Result has 153 places, 143 transitions, 332 flow [2022-11-16 12:05:19,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=153, PETRI_TRANSITIONS=143} [2022-11-16 12:05:19,651 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 5 predicate places. [2022-11-16 12:05:19,651 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 143 transitions, 332 flow [2022-11-16 12:05:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,652 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:19,652 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:19,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:05:19,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:19,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:19,859 INFO L85 PathProgramCache]: Analyzing trace with hash -201493965, now seen corresponding path program 1 times [2022-11-16 12:05:19,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:19,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709401304] [2022-11-16 12:05:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:19,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:20,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:20,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709401304] [2022-11-16 12:05:20,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709401304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:20,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227963966] [2022-11-16 12:05:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:20,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:20,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:20,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:05:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:20,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:20,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227963966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:20,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:20,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-16 12:05:20,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772021889] [2022-11-16 12:05:20,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:20,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:05:20,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:05:20,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:05:20,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:20,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 143 transitions, 332 flow. Second operand has 9 states, 9 states have (on average 139.55555555555554) internal successors, (1256), 9 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:20,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:20,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:20,672 INFO L130 PetriNetUnfolder]: 145/476 cut-off events. [2022-11-16 12:05:20,672 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-16 12:05:20,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 476 events. 145/476 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1922 event pairs, 1 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 864. Up to 56 conditions per place. [2022-11-16 12:05:20,676 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 68 selfloop transitions, 26 changer transitions 0/217 dead transitions. [2022-11-16 12:05:20,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 217 transitions, 721 flow [2022-11-16 12:05:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:05:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:05:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2008 transitions. [2022-11-16 12:05:20,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8692640692640693 [2022-11-16 12:05:20,681 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2008 transitions. [2022-11-16 12:05:20,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2008 transitions. [2022-11-16 12:05:20,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:20,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2008 transitions. [2022-11-16 12:05:20,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.42857142857142) internal successors, (2008), 14 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,693 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,693 INFO L175 Difference]: Start difference. First operand has 153 places, 143 transitions, 332 flow. Second operand 14 states and 2008 transitions. [2022-11-16 12:05:20,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 217 transitions, 721 flow [2022-11-16 12:05:20,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 705 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 12:05:20,698 INFO L231 Difference]: Finished difference. Result has 165 places, 171 transitions, 482 flow [2022-11-16 12:05:20,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=482, PETRI_PLACES=165, PETRI_TRANSITIONS=171} [2022-11-16 12:05:20,699 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 17 predicate places. [2022-11-16 12:05:20,700 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 171 transitions, 482 flow [2022-11-16 12:05:20,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.55555555555554) internal successors, (1256), 9 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:20,701 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:20,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:20,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:20,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1225427711, now seen corresponding path program 1 times [2022-11-16 12:05:20,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:20,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963632876] [2022-11-16 12:05:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:20,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:21,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:21,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963632876] [2022-11-16 12:05:21,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963632876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:21,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712550178] [2022-11-16 12:05:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:21,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:21,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:21,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:21,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:05:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:21,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:05:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:21,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712550178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:21,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:05:21,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-16 12:05:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790633209] [2022-11-16 12:05:21,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:21,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:05:21,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:05:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:05:21,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-11-16 12:05:21,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 171 transitions, 482 flow. Second operand has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:21,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:21,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-11-16 12:05:21,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:21,710 INFO L130 PetriNetUnfolder]: 65/414 cut-off events. [2022-11-16 12:05:21,711 INFO L131 PetriNetUnfolder]: For 181/196 co-relation queries the response was YES. [2022-11-16 12:05:21,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 414 events. 65/414 cut-off events. For 181/196 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1524 event pairs, 7 based on Foata normal form. 12/413 useless extension candidates. Maximal degree in co-relation 751. Up to 68 conditions per place. [2022-11-16 12:05:21,717 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 36 selfloop transitions, 5 changer transitions 5/180 dead transitions. [2022-11-16 12:05:21,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 180 transitions, 596 flow [2022-11-16 12:05:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:05:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:05:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 892 transitions. [2022-11-16 12:05:21,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7722943722943723 [2022-11-16 12:05:21,721 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 892 transitions. [2022-11-16 12:05:21,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 892 transitions. [2022-11-16 12:05:21,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:21,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 892 transitions. [2022-11-16 12:05:21,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.42857142857143) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:21,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:21,726 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:21,727 INFO L175 Difference]: Start difference. First operand has 165 places, 171 transitions, 482 flow. Second operand 7 states and 892 transitions. [2022-11-16 12:05:21,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 180 transitions, 596 flow [2022-11-16 12:05:21,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 180 transitions, 596 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:21,737 INFO L231 Difference]: Finished difference. Result has 173 places, 172 transitions, 504 flow [2022-11-16 12:05:21,737 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=173, PETRI_TRANSITIONS=172} [2022-11-16 12:05:21,739 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 25 predicate places. [2022-11-16 12:05:21,740 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 172 transitions, 504 flow [2022-11-16 12:05:21,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:21,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:21,741 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:21,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:21,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1694617530, now seen corresponding path program 1 times [2022-11-16 12:05:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:21,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847955618] [2022-11-16 12:05:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:22,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847955618] [2022-11-16 12:05:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847955618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472995516] [2022-11-16 12:05:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:22,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:22,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:22,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:22,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:05:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:22,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:22,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:22,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:22,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472995516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:22,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:22,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-16 12:05:22,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333610168] [2022-11-16 12:05:22,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:22,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:05:22,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:05:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:05:22,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:22,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 172 transitions, 504 flow. Second operand has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:22,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:22,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:22,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:22,756 INFO L130 PetriNetUnfolder]: 225/688 cut-off events. [2022-11-16 12:05:22,756 INFO L131 PetriNetUnfolder]: For 610/610 co-relation queries the response was YES. [2022-11-16 12:05:22,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 688 events. 225/688 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3165 event pairs, 10 based on Foata normal form. 8/690 useless extension candidates. Maximal degree in co-relation 1728. Up to 87 conditions per place. [2022-11-16 12:05:22,763 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 85 selfloop transitions, 63 changer transitions 0/272 dead transitions. [2022-11-16 12:05:22,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 272 transitions, 1284 flow [2022-11-16 12:05:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:05:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:05:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2005 transitions. [2022-11-16 12:05:22,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8679653679653679 [2022-11-16 12:05:22,768 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2005 transitions. [2022-11-16 12:05:22,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2005 transitions. [2022-11-16 12:05:22,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:22,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2005 transitions. [2022-11-16 12:05:22,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.21428571428572) internal successors, (2005), 14 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:22,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:22,782 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:22,783 INFO L175 Difference]: Start difference. First operand has 173 places, 172 transitions, 504 flow. Second operand 14 states and 2005 transitions. [2022-11-16 12:05:22,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 272 transitions, 1284 flow [2022-11-16 12:05:22,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 272 transitions, 1262 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-11-16 12:05:22,794 INFO L231 Difference]: Finished difference. Result has 189 places, 220 transitions, 1039 flow [2022-11-16 12:05:22,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1039, PETRI_PLACES=189, PETRI_TRANSITIONS=220} [2022-11-16 12:05:22,797 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 41 predicate places. [2022-11-16 12:05:22,797 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 220 transitions, 1039 flow [2022-11-16 12:05:22,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:22,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:22,798 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:22,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:23,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:23,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash -787524414, now seen corresponding path program 2 times [2022-11-16 12:05:23,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:23,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961455124] [2022-11-16 12:05:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:23,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:23,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:23,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961455124] [2022-11-16 12:05:23,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961455124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:23,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:23,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:05:23,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515610483] [2022-11-16 12:05:23,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:05:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:05:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:05:23,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:23,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 220 transitions, 1039 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:23,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:23,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:23,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:23,395 INFO L130 PetriNetUnfolder]: 225/705 cut-off events. [2022-11-16 12:05:23,396 INFO L131 PetriNetUnfolder]: For 1481/1498 co-relation queries the response was YES. [2022-11-16 12:05:23,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 705 events. 225/705 cut-off events. For 1481/1498 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3417 event pairs, 69 based on Foata normal form. 3/700 useless extension candidates. Maximal degree in co-relation 2120. Up to 231 conditions per place. [2022-11-16 12:05:23,403 INFO L137 encePairwiseOnDemand]: 158/165 looper letters, 95 selfloop transitions, 21 changer transitions 6/246 dead transitions. [2022-11-16 12:05:23,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 246 transitions, 1450 flow [2022-11-16 12:05:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:05:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:05:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 865 transitions. [2022-11-16 12:05:23,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8737373737373737 [2022-11-16 12:05:23,406 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 865 transitions. [2022-11-16 12:05:23,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 865 transitions. [2022-11-16 12:05:23,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:23,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 865 transitions. [2022-11-16 12:05:23,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.16666666666666) internal successors, (865), 6 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:23,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:23,411 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:23,411 INFO L175 Difference]: Start difference. First operand has 189 places, 220 transitions, 1039 flow. Second operand 6 states and 865 transitions. [2022-11-16 12:05:23,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 246 transitions, 1450 flow [2022-11-16 12:05:23,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 246 transitions, 1380 flow, removed 35 selfloop flow, removed 0 redundant places. [2022-11-16 12:05:23,428 INFO L231 Difference]: Finished difference. Result has 196 places, 220 transitions, 1043 flow [2022-11-16 12:05:23,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1043, PETRI_PLACES=196, PETRI_TRANSITIONS=220} [2022-11-16 12:05:23,429 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 48 predicate places. [2022-11-16 12:05:23,430 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 220 transitions, 1043 flow [2022-11-16 12:05:23,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:23,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:23,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:23,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:05:23,431 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:23,432 INFO L85 PathProgramCache]: Analyzing trace with hash 674420228, now seen corresponding path program 3 times [2022-11-16 12:05:23,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:23,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723658980] [2022-11-16 12:05:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:23,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:23,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723658980] [2022-11-16 12:05:23,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723658980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141025428] [2022-11-16 12:05:23,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:05:23,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:23,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:23,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:05:23,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:05:23,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:23,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:23,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141025428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:23,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:23,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-16 12:05:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901033616] [2022-11-16 12:05:23,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:05:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:05:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:05:23,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:23,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 220 transitions, 1043 flow. Second operand has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:23,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:23,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:23,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:24,182 INFO L130 PetriNetUnfolder]: 257/823 cut-off events. [2022-11-16 12:05:24,199 INFO L131 PetriNetUnfolder]: For 1745/1757 co-relation queries the response was YES. [2022-11-16 12:05:24,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2510 conditions, 823 events. 257/823 cut-off events. For 1745/1757 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4461 event pairs, 60 based on Foata normal form. 14/829 useless extension candidates. Maximal degree in co-relation 2482. Up to 146 conditions per place. [2022-11-16 12:05:24,207 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 99 selfloop transitions, 56 changer transitions 1/280 dead transitions. [2022-11-16 12:05:24,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 280 transitions, 1716 flow [2022-11-16 12:05:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:05:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1309 transitions. [2022-11-16 12:05:24,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8814814814814815 [2022-11-16 12:05:24,211 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1309 transitions. [2022-11-16 12:05:24,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1309 transitions. [2022-11-16 12:05:24,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:24,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1309 transitions. [2022-11-16 12:05:24,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.44444444444446) internal successors, (1309), 9 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,219 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,219 INFO L175 Difference]: Start difference. First operand has 196 places, 220 transitions, 1043 flow. Second operand 9 states and 1309 transitions. [2022-11-16 12:05:24,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 280 transitions, 1716 flow [2022-11-16 12:05:24,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 280 transitions, 1686 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 12:05:24,236 INFO L231 Difference]: Finished difference. Result has 205 places, 239 transitions, 1386 flow [2022-11-16 12:05:24,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1386, PETRI_PLACES=205, PETRI_TRANSITIONS=239} [2022-11-16 12:05:24,238 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 57 predicate places. [2022-11-16 12:05:24,238 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 239 transitions, 1386 flow [2022-11-16 12:05:24,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:24,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:24,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:24,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:24,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash -753816634, now seen corresponding path program 4 times [2022-11-16 12:05:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:24,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781574667] [2022-11-16 12:05:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:24,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:24,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781574667] [2022-11-16 12:05:24,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781574667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:24,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:24,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:05:24,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804696419] [2022-11-16 12:05:24,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:24,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:05:24,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:24,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:05:24,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:05:24,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:24,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 239 transitions, 1386 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:24,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:24,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:24,931 INFO L130 PetriNetUnfolder]: 254/840 cut-off events. [2022-11-16 12:05:24,931 INFO L131 PetriNetUnfolder]: For 2488/2492 co-relation queries the response was YES. [2022-11-16 12:05:24,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2730 conditions, 840 events. 254/840 cut-off events. For 2488/2492 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4619 event pairs, 64 based on Foata normal form. 3/832 useless extension candidates. Maximal degree in co-relation 2698. Up to 278 conditions per place. [2022-11-16 12:05:24,941 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 119 selfloop transitions, 31 changer transitions 7/281 dead transitions. [2022-11-16 12:05:24,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 1999 flow [2022-11-16 12:05:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:05:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:05:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 882 transitions. [2022-11-16 12:05:24,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8909090909090909 [2022-11-16 12:05:24,945 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 882 transitions. [2022-11-16 12:05:24,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 882 transitions. [2022-11-16 12:05:24,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:24,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 882 transitions. [2022-11-16 12:05:24,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,951 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,952 INFO L175 Difference]: Start difference. First operand has 205 places, 239 transitions, 1386 flow. Second operand 6 states and 882 transitions. [2022-11-16 12:05:24,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 1999 flow [2022-11-16 12:05:24,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 281 transitions, 1862 flow, removed 23 selfloop flow, removed 5 redundant places. [2022-11-16 12:05:24,974 INFO L231 Difference]: Finished difference. Result has 209 places, 242 transitions, 1418 flow [2022-11-16 12:05:24,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1418, PETRI_PLACES=209, PETRI_TRANSITIONS=242} [2022-11-16 12:05:24,975 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 61 predicate places. [2022-11-16 12:05:24,976 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 242 transitions, 1418 flow [2022-11-16 12:05:24,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:24,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:24,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:24,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:05:24,977 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash 343024828, now seen corresponding path program 1 times [2022-11-16 12:05:24,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:24,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023836614] [2022-11-16 12:05:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:24,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:25,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:25,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023836614] [2022-11-16 12:05:25,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023836614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:25,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178536812] [2022-11-16 12:05:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:25,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:25,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:25,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:05:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:25,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:25,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:25,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:25,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178536812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:25,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:25,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-16 12:05:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684634852] [2022-11-16 12:05:25,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:25,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:05:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:05:25,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:05:25,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:25,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 242 transitions, 1418 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:25,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:25,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:25,903 INFO L130 PetriNetUnfolder]: 310/1065 cut-off events. [2022-11-16 12:05:25,903 INFO L131 PetriNetUnfolder]: For 2730/2746 co-relation queries the response was YES. [2022-11-16 12:05:25,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3251 conditions, 1065 events. 310/1065 cut-off events. For 2730/2746 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6677 event pairs, 40 based on Foata normal form. 8/1061 useless extension candidates. Maximal degree in co-relation 3219. Up to 138 conditions per place. [2022-11-16 12:05:25,914 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 112 selfloop transitions, 81 changer transitions 1/318 dead transitions. [2022-11-16 12:05:25,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 2220 flow [2022-11-16 12:05:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:05:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 12:05:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1877 transitions. [2022-11-16 12:05:25,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.875058275058275 [2022-11-16 12:05:25,919 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1877 transitions. [2022-11-16 12:05:25,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1877 transitions. [2022-11-16 12:05:25,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:25,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1877 transitions. [2022-11-16 12:05:25,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.3846153846154) internal successors, (1877), 13 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,929 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,930 INFO L175 Difference]: Start difference. First operand has 209 places, 242 transitions, 1418 flow. Second operand 13 states and 1877 transitions. [2022-11-16 12:05:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 2220 flow [2022-11-16 12:05:25,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 318 transitions, 2173 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-16 12:05:25,952 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 1805 flow [2022-11-16 12:05:25,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1805, PETRI_PLACES=224, PETRI_TRANSITIONS=262} [2022-11-16 12:05:25,953 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 76 predicate places. [2022-11-16 12:05:25,953 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 1805 flow [2022-11-16 12:05:25,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:25,954 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:25,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:05:26,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash -646540378, now seen corresponding path program 2 times [2022-11-16 12:05:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479361016] [2022-11-16 12:05:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:26,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:26,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479361016] [2022-11-16 12:05:26,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479361016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:26,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:26,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:05:26,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682531468] [2022-11-16 12:05:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:26,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:05:26,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:05:26,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:05:26,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:26,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 262 transitions, 1805 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:26,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:26,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:26,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:26,592 INFO L130 PetriNetUnfolder]: 299/978 cut-off events. [2022-11-16 12:05:26,593 INFO L131 PetriNetUnfolder]: For 3609/3625 co-relation queries the response was YES. [2022-11-16 12:05:26,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 978 events. 299/978 cut-off events. For 3609/3625 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5773 event pairs, 92 based on Foata normal form. 6/973 useless extension candidates. Maximal degree in co-relation 3247. Up to 371 conditions per place. [2022-11-16 12:05:26,603 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 128 selfloop transitions, 31 changer transitions 7/290 dead transitions. [2022-11-16 12:05:26,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 290 transitions, 2311 flow [2022-11-16 12:05:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:05:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:05:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2022-11-16 12:05:26,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8848484848484849 [2022-11-16 12:05:26,606 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2022-11-16 12:05:26,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2022-11-16 12:05:26,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:26,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2022-11-16 12:05:26,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:26,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:26,612 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:26,612 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 1805 flow. Second operand 6 states and 876 transitions. [2022-11-16 12:05:26,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 290 transitions, 2311 flow [2022-11-16 12:05:26,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 290 transitions, 2274 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-16 12:05:26,635 INFO L231 Difference]: Finished difference. Result has 227 places, 262 transitions, 1845 flow [2022-11-16 12:05:26,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1845, PETRI_PLACES=227, PETRI_TRANSITIONS=262} [2022-11-16 12:05:26,636 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 79 predicate places. [2022-11-16 12:05:26,637 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 262 transitions, 1845 flow [2022-11-16 12:05:26,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:26,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:26,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:26,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:05:26,638 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2027393474, now seen corresponding path program 5 times [2022-11-16 12:05:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:26,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983517948] [2022-11-16 12:05:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:26,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:26,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983517948] [2022-11-16 12:05:26,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983517948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:26,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437849135] [2022-11-16 12:05:26,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:05:26,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:26,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:26,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:26,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:05:26,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:05:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:26,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:26,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:27,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437849135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:27,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:27,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-16 12:05:27,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438192954] [2022-11-16 12:05:27,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:27,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:05:27,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:27,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:05:27,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:05:27,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:27,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 262 transitions, 1845 flow. Second operand has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:27,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:27,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:27,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:27,471 INFO L130 PetriNetUnfolder]: 305/962 cut-off events. [2022-11-16 12:05:27,471 INFO L131 PetriNetUnfolder]: For 3921/3921 co-relation queries the response was YES. [2022-11-16 12:05:27,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3329 conditions, 962 events. 305/962 cut-off events. For 3921/3921 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5428 event pairs, 64 based on Foata normal form. 11/962 useless extension candidates. Maximal degree in co-relation 3294. Up to 141 conditions per place. [2022-11-16 12:05:27,482 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 102 selfloop transitions, 86 changer transitions 1/313 dead transitions. [2022-11-16 12:05:27,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 2502 flow [2022-11-16 12:05:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:05:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 12:05:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1867 transitions. [2022-11-16 12:05:27,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8703962703962704 [2022-11-16 12:05:27,487 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1867 transitions. [2022-11-16 12:05:27,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1867 transitions. [2022-11-16 12:05:27,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:27,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1867 transitions. [2022-11-16 12:05:27,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.6153846153846) internal successors, (1867), 13 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:27,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:27,497 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:27,497 INFO L175 Difference]: Start difference. First operand has 227 places, 262 transitions, 1845 flow. Second operand 13 states and 1867 transitions. [2022-11-16 12:05:27,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 2502 flow [2022-11-16 12:05:27,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 313 transitions, 2425 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-16 12:05:27,522 INFO L231 Difference]: Finished difference. Result has 232 places, 268 transitions, 2015 flow [2022-11-16 12:05:27,523 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2015, PETRI_PLACES=232, PETRI_TRANSITIONS=268} [2022-11-16 12:05:27,523 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 84 predicate places. [2022-11-16 12:05:27,523 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 268 transitions, 2015 flow [2022-11-16 12:05:27,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:27,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:27,525 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:27,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:27,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:27,731 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1064421096, now seen corresponding path program 3 times [2022-11-16 12:05:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:27,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306097431] [2022-11-16 12:05:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:27,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:27,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:27,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306097431] [2022-11-16 12:05:27,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306097431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:27,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579513937] [2022-11-16 12:05:27,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:05:27,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:27,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:27,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:27,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:05:28,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:05:28,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:05:28,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:28,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:05:28,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579513937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:28,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:28,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-16 12:05:28,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5414909] [2022-11-16 12:05:28,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:05:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:05:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:05:28,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-16 12:05:28,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 268 transitions, 2015 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:28,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-16 12:05:28,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:28,591 INFO L130 PetriNetUnfolder]: 301/935 cut-off events. [2022-11-16 12:05:28,591 INFO L131 PetriNetUnfolder]: For 4091/4091 co-relation queries the response was YES. [2022-11-16 12:05:28,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 935 events. 301/935 cut-off events. For 4091/4091 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5182 event pairs, 51 based on Foata normal form. 6/931 useless extension candidates. Maximal degree in co-relation 3342. Up to 198 conditions per place. [2022-11-16 12:05:28,602 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 108 selfloop transitions, 65 changer transitions 1/298 dead transitions. [2022-11-16 12:05:28,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 298 transitions, 2489 flow [2022-11-16 12:05:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:05:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1299 transitions. [2022-11-16 12:05:28,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8747474747474747 [2022-11-16 12:05:28,607 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1299 transitions. [2022-11-16 12:05:28,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1299 transitions. [2022-11-16 12:05:28,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:28,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1299 transitions. [2022-11-16 12:05:28,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 144.33333333333334) internal successors, (1299), 9 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,613 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,613 INFO L175 Difference]: Start difference. First operand has 232 places, 268 transitions, 2015 flow. Second operand 9 states and 1299 transitions. [2022-11-16 12:05:28,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 298 transitions, 2489 flow [2022-11-16 12:05:28,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 298 transitions, 2407 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-16 12:05:28,639 INFO L231 Difference]: Finished difference. Result has 232 places, 268 transitions, 2081 flow [2022-11-16 12:05:28,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2081, PETRI_PLACES=232, PETRI_TRANSITIONS=268} [2022-11-16 12:05:28,640 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 84 predicate places. [2022-11-16 12:05:28,640 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 268 transitions, 2081 flow [2022-11-16 12:05:28,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,641 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:28,641 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:28,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:28,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:05:28,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1878094116, now seen corresponding path program 1 times [2022-11-16 12:05:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:28,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667803536] [2022-11-16 12:05:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:28,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:29,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667803536] [2022-11-16 12:05:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667803536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893668960] [2022-11-16 12:05:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:29,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:29,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:29,903 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:05:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:05:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:30,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-11-16 12:05:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:30,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:30,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2022-11-16 12:05:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893668960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:30,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 29 [2022-11-16 12:05:30,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524324964] [2022-11-16 12:05:30,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:30,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:05:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:05:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:05:30,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 165 [2022-11-16 12:05:30,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 268 transitions, 2081 flow. Second operand has 29 states, 29 states have (on average 80.48275862068965) internal successors, (2334), 29 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:30,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:30,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 165 [2022-11-16 12:05:30,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:34,703 INFO L130 PetriNetUnfolder]: 1315/4688 cut-off events. [2022-11-16 12:05:34,703 INFO L131 PetriNetUnfolder]: For 19543/19799 co-relation queries the response was YES. [2022-11-16 12:05:34,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 4688 events. 1315/4688 cut-off events. For 19543/19799 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 46020 event pairs, 99 based on Foata normal form. 72/4650 useless extension candidates. Maximal degree in co-relation 16605. Up to 775 conditions per place. [2022-11-16 12:05:34,763 INFO L137 encePairwiseOnDemand]: 132/165 looper letters, 134 selfloop transitions, 59 changer transitions 50/432 dead transitions. [2022-11-16 12:05:34,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 432 transitions, 3000 flow [2022-11-16 12:05:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:05:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-16 12:05:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4970 transitions. [2022-11-16 12:05:34,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4781144781144781 [2022-11-16 12:05:34,772 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4970 transitions. [2022-11-16 12:05:34,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4970 transitions. [2022-11-16 12:05:34,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:34,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4970 transitions. [2022-11-16 12:05:34,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 78.88888888888889) internal successors, (4970), 63 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 165.0) internal successors, (10560), 64 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,805 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 165.0) internal successors, (10560), 64 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,805 INFO L175 Difference]: Start difference. First operand has 232 places, 268 transitions, 2081 flow. Second operand 63 states and 4970 transitions. [2022-11-16 12:05:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 432 transitions, 3000 flow [2022-11-16 12:05:34,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 432 transitions, 2810 flow, removed 13 selfloop flow, removed 12 redundant places. [2022-11-16 12:05:34,911 INFO L231 Difference]: Finished difference. Result has 315 places, 312 transitions, 2284 flow [2022-11-16 12:05:34,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=2284, PETRI_PLACES=315, PETRI_TRANSITIONS=312} [2022-11-16 12:05:34,912 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 167 predicate places. [2022-11-16 12:05:34,912 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 312 transitions, 2284 flow [2022-11-16 12:05:34,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.48275862068965) internal successors, (2334), 29 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:34,914 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:34,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:35,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:05:35,119 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash -159129583, now seen corresponding path program 2 times [2022-11-16 12:05:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:35,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668716634] [2022-11-16 12:05:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:35,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:05:36,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668716634] [2022-11-16 12:05:36,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668716634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322760221] [2022-11-16 12:05:36,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:36,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:36,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:36,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:05:36,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:05:36,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:36,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 12:05:36,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:37,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:05:37,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:05:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:38,208 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 12:05:38,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 46 [2022-11-16 12:05:38,222 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 29 treesize of output 21 [2022-11-16 12:05:38,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 12:05:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:05:38,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:39,112 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (~f~0.offset Int) (~f~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_383))) (let ((.cse2 (select (select .cse0 ~f~0.base) (+ (* c_~counter~0 4) ~f~0.offset)))) (let ((.cse1 (+ (* .cse2 4) |c_ULTIMATE.start_main_#t~ret19#1.offset|))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_main_#t~ret19#1.base|) .cse1) c_~counter~0)) (not (<= 0 .cse2)) (not (< .cse2 c_~n_inv~0)) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_#t~ret19#1.base|) .cse1) 0)))))) is different from false [2022-11-16 12:05:39,157 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (~f~0.offset Int) (~f~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_383))) (let ((.cse2 (select (select .cse0 ~f~0.base) (+ (* c_~counter~0 4) ~f~0.offset)))) (let ((.cse1 (+ (* .cse2 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) .cse1) 0) (not (<= 0 .cse2)) (not (= c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) .cse1))) (not (< .cse2 c_~n_inv~0))))))) is different from false [2022-11-16 12:05:39,188 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_383 (Array Int Int)) (~f~0.offset Int) (~f~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_383))) (let ((.cse2 (select (select .cse0 ~f~0.base) (+ (* c_~counter~0 4) ~f~0.offset)))) (let ((.cse1 (+ (* .cse2 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (not (= c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1))) (not (<= 0 .cse2)) (not (< .cse2 c_~n_inv~0)) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 0)))))) is different from false [2022-11-16 12:05:39,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:05:39,526 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 [2022-11-16 12:05:39,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:05:39,564 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 368 treesize of output 326 [2022-11-16 12:05:39,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:05:39,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 302 treesize of output 276 [2022-11-16 12:05:39,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:05:39,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 106 [2022-11-16 12:05:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:05:42,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322760221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:42,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:42,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2022-11-16 12:05:42,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068306533] [2022-11-16 12:05:42,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:42,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:05:42,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:42,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:05:42,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2113, Unknown=8, NotChecked=288, Total=2652 [2022-11-16 12:05:42,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 165 [2022-11-16 12:05:42,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 312 transitions, 2284 flow. Second operand has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:42,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:42,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 165 [2022-11-16 12:05:42,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:46,924 INFO L130 PetriNetUnfolder]: 1190/4446 cut-off events. [2022-11-16 12:05:46,925 INFO L131 PetriNetUnfolder]: For 18518/18915 co-relation queries the response was YES. [2022-11-16 12:05:46,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16344 conditions, 4446 events. 1190/4446 cut-off events. For 18518/18915 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 44232 event pairs, 244 based on Foata normal form. 62/4385 useless extension candidates. Maximal degree in co-relation 16287. Up to 973 conditions per place. [2022-11-16 12:05:46,969 INFO L137 encePairwiseOnDemand]: 135/165 looper letters, 107 selfloop transitions, 57 changer transitions 9/361 dead transitions. [2022-11-16 12:05:46,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 361 transitions, 2912 flow [2022-11-16 12:05:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:05:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 12:05:46,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2722 transitions. [2022-11-16 12:05:46,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4458640458640459 [2022-11-16 12:05:46,976 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2722 transitions. [2022-11-16 12:05:46,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2722 transitions. [2022-11-16 12:05:46,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:46,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2722 transitions. [2022-11-16 12:05:46,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.56756756756756) internal successors, (2722), 37 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:46,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 165.0) internal successors, (6270), 38 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:46,994 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 165.0) internal successors, (6270), 38 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:46,994 INFO L175 Difference]: Start difference. First operand has 315 places, 312 transitions, 2284 flow. Second operand 37 states and 2722 transitions. [2022-11-16 12:05:46,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 361 transitions, 2912 flow [2022-11-16 12:05:47,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 361 transitions, 2754 flow, removed 65 selfloop flow, removed 23 redundant places. [2022-11-16 12:05:47,094 INFO L231 Difference]: Finished difference. Result has 323 places, 330 transitions, 2477 flow [2022-11-16 12:05:47,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2477, PETRI_PLACES=323, PETRI_TRANSITIONS=330} [2022-11-16 12:05:47,095 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 175 predicate places. [2022-11-16 12:05:47,095 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 330 transitions, 2477 flow [2022-11-16 12:05:47,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:47,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:47,097 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:47,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:47,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:05:47,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:47,303 INFO L85 PathProgramCache]: Analyzing trace with hash 117102969, now seen corresponding path program 3 times [2022-11-16 12:05:47,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:47,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841590085] [2022-11-16 12:05:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:47,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:05:48,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:48,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841590085] [2022-11-16 12:05:48,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841590085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:48,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279544197] [2022-11-16 12:05:48,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:05:48,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:48,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:48,075 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:48,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:05:48,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:05:48,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:05:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:48,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-11-16 12:05:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:05:48,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:48,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2022-11-16 12:05:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:05:48,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279544197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:48,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:48,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-11-16 12:05:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806792185] [2022-11-16 12:05:48,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:48,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:05:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:05:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:05:48,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2022-11-16 12:05:48,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 330 transitions, 2477 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:48,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:48,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2022-11-16 12:05:48,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:51,016 INFO L130 PetriNetUnfolder]: 1780/6757 cut-off events. [2022-11-16 12:05:51,016 INFO L131 PetriNetUnfolder]: For 31386/31872 co-relation queries the response was YES. [2022-11-16 12:05:51,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25370 conditions, 6757 events. 1780/6757 cut-off events. For 31386/31872 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 73397 event pairs, 181 based on Foata normal form. 131/6764 useless extension candidates. Maximal degree in co-relation 25317. Up to 919 conditions per place. [2022-11-16 12:05:51,080 INFO L137 encePairwiseOnDemand]: 147/165 looper letters, 110 selfloop transitions, 49 changer transitions 9/379 dead transitions. [2022-11-16 12:05:51,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 379 transitions, 3089 flow [2022-11-16 12:05:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:05:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:05:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2026 transitions. [2022-11-16 12:05:51,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5847041847041847 [2022-11-16 12:05:51,084 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2026 transitions. [2022-11-16 12:05:51,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2026 transitions. [2022-11-16 12:05:51,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:51,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2026 transitions. [2022-11-16 12:05:51,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.47619047619048) internal successors, (2026), 21 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:51,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:51,095 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:51,095 INFO L175 Difference]: Start difference. First operand has 323 places, 330 transitions, 2477 flow. Second operand 21 states and 2026 transitions. [2022-11-16 12:05:51,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 379 transitions, 3089 flow [2022-11-16 12:05:51,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 379 transitions, 2959 flow, removed 30 selfloop flow, removed 28 redundant places. [2022-11-16 12:05:51,240 INFO L231 Difference]: Finished difference. Result has 319 places, 342 transitions, 2666 flow [2022-11-16 12:05:51,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2666, PETRI_PLACES=319, PETRI_TRANSITIONS=342} [2022-11-16 12:05:51,241 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 171 predicate places. [2022-11-16 12:05:51,241 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 342 transitions, 2666 flow [2022-11-16 12:05:51,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:51,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:51,242 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:51,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:51,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:05:51,448 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:51,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1297539565, now seen corresponding path program 4 times [2022-11-16 12:05:51,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:51,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713399964] [2022-11-16 12:05:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:51,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:05:51,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:51,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713399964] [2022-11-16 12:05:51,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713399964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:51,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303978375] [2022-11-16 12:05:51,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:05:51,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:51,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:51,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:51,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:05:51,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:05:51,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:05:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:05:52,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:05:52,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303978375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:52,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:52,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-16 12:05:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690269413] [2022-11-16 12:05:52,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:05:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:05:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:05:52,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-16 12:05:52,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 342 transitions, 2666 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:52,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:52,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-16 12:05:52,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:56,643 INFO L130 PetriNetUnfolder]: 4870/13718 cut-off events. [2022-11-16 12:05:56,643 INFO L131 PetriNetUnfolder]: For 63353/63369 co-relation queries the response was YES. [2022-11-16 12:05:56,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54169 conditions, 13718 events. 4870/13718 cut-off events. For 63353/63369 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 146071 event pairs, 895 based on Foata normal form. 57/13690 useless extension candidates. Maximal degree in co-relation 54114. Up to 3400 conditions per place. [2022-11-16 12:05:56,799 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 540 selfloop transitions, 186 changer transitions 30/913 dead transitions. [2022-11-16 12:05:56,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 913 transitions, 9844 flow [2022-11-16 12:05:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 12:05:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 12:05:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6878 transitions. [2022-11-16 12:05:56,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8507111935683365 [2022-11-16 12:05:56,808 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6878 transitions. [2022-11-16 12:05:56,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6878 transitions. [2022-11-16 12:05:56,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:56,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6878 transitions. [2022-11-16 12:05:56,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 140.3673469387755) internal successors, (6878), 49 states have internal predecessors, (6878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:56,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 165.0) internal successors, (8250), 50 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:56,839 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 165.0) internal successors, (8250), 50 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:56,839 INFO L175 Difference]: Start difference. First operand has 319 places, 342 transitions, 2666 flow. Second operand 49 states and 6878 transitions. [2022-11-16 12:05:56,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 913 transitions, 9844 flow [2022-11-16 12:05:57,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 913 transitions, 9075 flow, removed 365 selfloop flow, removed 14 redundant places. [2022-11-16 12:05:57,432 INFO L231 Difference]: Finished difference. Result has 356 places, 508 transitions, 4320 flow [2022-11-16 12:05:57,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4320, PETRI_PLACES=356, PETRI_TRANSITIONS=508} [2022-11-16 12:05:57,434 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 208 predicate places. [2022-11-16 12:05:57,434 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 508 transitions, 4320 flow [2022-11-16 12:05:57,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:57,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:57,435 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:57,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 12:05:57,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:05:57,642 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -726681663, now seen corresponding path program 5 times [2022-11-16 12:05:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:57,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526022777] [2022-11-16 12:05:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:05:57,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:57,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526022777] [2022-11-16 12:05:57,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526022777] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:57,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578863755] [2022-11-16 12:05:57,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:05:57,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:57,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:57,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:57,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:05:58,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:05:58,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:05:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:05:58,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:05:58,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578863755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:58,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:58,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-16 12:05:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925563429] [2022-11-16 12:05:58,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:58,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:05:58,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:58,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:05:58,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:05:58,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-16 12:05:58,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 508 transitions, 4320 flow. Second operand has 21 states, 21 states have (on average 137.47619047619048) internal successors, (2887), 21 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:58,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:58,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-16 12:05:58,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:02,323 INFO L130 PetriNetUnfolder]: 4450/13008 cut-off events. [2022-11-16 12:06:02,324 INFO L131 PetriNetUnfolder]: For 54596/54610 co-relation queries the response was YES. [2022-11-16 12:06:02,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54561 conditions, 13008 events. 4450/13008 cut-off events. For 54596/54610 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 139924 event pairs, 1249 based on Foata normal form. 30/12938 useless extension candidates. Maximal degree in co-relation 54503. Up to 6012 conditions per place. [2022-11-16 12:06:02,610 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 358 selfloop transitions, 126 changer transitions 17/658 dead transitions. [2022-11-16 12:06:02,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 658 transitions, 6738 flow [2022-11-16 12:06:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:06:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:06:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2022-11-16 12:06:02,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8441919191919192 [2022-11-16 12:06:02,618 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2022-11-16 12:06:02,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2022-11-16 12:06:02,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:02,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2022-11-16 12:06:02,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:02,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:02,632 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:02,633 INFO L175 Difference]: Start difference. First operand has 356 places, 508 transitions, 4320 flow. Second operand 24 states and 3343 transitions. [2022-11-16 12:06:02,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 658 transitions, 6738 flow [2022-11-16 12:06:03,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 658 transitions, 6574 flow, removed 54 selfloop flow, removed 4 redundant places. [2022-11-16 12:06:03,197 INFO L231 Difference]: Finished difference. Result has 385 places, 529 transitions, 4752 flow [2022-11-16 12:06:03,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4752, PETRI_PLACES=385, PETRI_TRANSITIONS=529} [2022-11-16 12:06:03,198 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 237 predicate places. [2022-11-16 12:06:03,199 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 529 transitions, 4752 flow [2022-11-16 12:06:03,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.47619047619048) internal successors, (2887), 21 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:03,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:03,200 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:03,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 12:06:03,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:06:03,406 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:06:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:03,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1024366783, now seen corresponding path program 6 times [2022-11-16 12:06:03,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:03,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973758775] [2022-11-16 12:06:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:03,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:03,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973758775] [2022-11-16 12:06:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973758775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193278527] [2022-11-16 12:06:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:06:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:03,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:03,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:06:03,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:06:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:06:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:04,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193278527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:04,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:04,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-16 12:06:04,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502130535] [2022-11-16 12:06:04,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:04,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:06:04,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:06:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:06:04,251 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-16 12:06:04,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 529 transitions, 4752 flow. Second operand has 21 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:04,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:04,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-16 12:06:04,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:10,361 INFO L130 PetriNetUnfolder]: 5962/17632 cut-off events. [2022-11-16 12:06:10,361 INFO L131 PetriNetUnfolder]: For 74394/74408 co-relation queries the response was YES. [2022-11-16 12:06:10,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73545 conditions, 17632 events. 5962/17632 cut-off events. For 74394/74408 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 200294 event pairs, 1103 based on Foata normal form. 52/17582 useless extension candidates. Maximal degree in co-relation 73480. Up to 4955 conditions per place. [2022-11-16 12:06:10,598 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 668 selfloop transitions, 255 changer transitions 27/1107 dead transitions. [2022-11-16 12:06:10,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1107 transitions, 11920 flow [2022-11-16 12:06:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 12:06:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-16 12:06:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 8962 transitions. [2022-11-16 12:06:10,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8486742424242424 [2022-11-16 12:06:10,613 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 8962 transitions. [2022-11-16 12:06:10,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 8962 transitions. [2022-11-16 12:06:10,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:10,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 8962 transitions. [2022-11-16 12:06:10,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 140.03125) internal successors, (8962), 64 states have internal predecessors, (8962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 165.0) internal successors, (10725), 65 states have internal predecessors, (10725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,649 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 165.0) internal successors, (10725), 65 states have internal predecessors, (10725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,649 INFO L175 Difference]: Start difference. First operand has 385 places, 529 transitions, 4752 flow. Second operand 64 states and 8962 transitions. [2022-11-16 12:06:10,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1107 transitions, 11920 flow [2022-11-16 12:06:11,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1107 transitions, 11766 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-16 12:06:11,450 INFO L231 Difference]: Finished difference. Result has 467 places, 627 transitions, 6416 flow [2022-11-16 12:06:11,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4661, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=6416, PETRI_PLACES=467, PETRI_TRANSITIONS=627} [2022-11-16 12:06:11,451 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 319 predicate places. [2022-11-16 12:06:11,451 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 627 transitions, 6416 flow [2022-11-16 12:06:11,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:11,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:11,452 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:11,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:11,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:11,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:06:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:11,659 INFO L85 PathProgramCache]: Analyzing trace with hash 322108609, now seen corresponding path program 7 times [2022-11-16 12:06:11,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:11,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559297370] [2022-11-16 12:06:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:11,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:11,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:11,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559297370] [2022-11-16 12:06:11,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559297370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690276637] [2022-11-16 12:06:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:06:11,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:11,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:11,882 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:11,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:06:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:12,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:06:12,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:12,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:06:12,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690276637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:12,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:12,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-16 12:06:12,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979072856] [2022-11-16 12:06:12,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:12,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:06:12,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:06:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:06:12,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-16 12:06:12,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 627 transitions, 6416 flow. Second operand has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:12,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-16 12:06:12,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:18,855 INFO L130 PetriNetUnfolder]: 5852/17732 cut-off events. [2022-11-16 12:06:18,855 INFO L131 PetriNetUnfolder]: For 98472/98510 co-relation queries the response was YES. [2022-11-16 12:06:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82899 conditions, 17732 events. 5852/17732 cut-off events. For 98472/98510 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 202195 event pairs, 800 based on Foata normal form. 188/17822 useless extension candidates. Maximal degree in co-relation 82811. Up to 2675 conditions per place. [2022-11-16 12:06:19,180 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 571 selfloop transitions, 333 changer transitions 7/1068 dead transitions. [2022-11-16 12:06:19,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 1068 transitions, 12637 flow [2022-11-16 12:06:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 12:06:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-16 12:06:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7020 transitions. [2022-11-16 12:06:19,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.850909090909091 [2022-11-16 12:06:19,189 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7020 transitions. [2022-11-16 12:06:19,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7020 transitions. [2022-11-16 12:06:19,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:19,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7020 transitions. [2022-11-16 12:06:19,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 140.4) internal successors, (7020), 50 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,211 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,211 INFO L175 Difference]: Start difference. First operand has 467 places, 627 transitions, 6416 flow. Second operand 50 states and 7020 transitions. [2022-11-16 12:06:19,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 1068 transitions, 12637 flow [2022-11-16 12:06:20,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1068 transitions, 12419 flow, removed 12 selfloop flow, removed 21 redundant places. [2022-11-16 12:06:20,756 INFO L231 Difference]: Finished difference. Result has 501 places, 693 transitions, 8002 flow [2022-11-16 12:06:20,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5963, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=8002, PETRI_PLACES=501, PETRI_TRANSITIONS=693} [2022-11-16 12:06:20,756 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 353 predicate places. [2022-11-16 12:06:20,757 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 693 transitions, 8002 flow [2022-11-16 12:06:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:20,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:20,757 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:20,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 12:06:20,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:20,958 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:06:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1892571253, now seen corresponding path program 8 times [2022-11-16 12:06:20,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:20,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476133283] [2022-11-16 12:06:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:20,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:21,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476133283] [2022-11-16 12:06:21,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476133283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:21,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299929552] [2022-11-16 12:06:21,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:21,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:21,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:21,179 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:21,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:06:21,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:06:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:06:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:21,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:21,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299929552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:21,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:21,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 12:06:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293360197] [2022-11-16 12:06:21,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:21,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:06:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:06:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:06:21,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-16 12:06:21,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 693 transitions, 8002 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:21,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:21,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-16 12:06:21,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:31,701 INFO L130 PetriNetUnfolder]: 7999/23089 cut-off events. [2022-11-16 12:06:31,702 INFO L131 PetriNetUnfolder]: For 174779/174817 co-relation queries the response was YES. [2022-11-16 12:06:32,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121276 conditions, 23089 events. 7999/23089 cut-off events. For 174779/174817 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 269346 event pairs, 578 based on Foata normal form. 93/23091 useless extension candidates. Maximal degree in co-relation 121176. Up to 4571 conditions per place. [2022-11-16 12:06:32,142 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 736 selfloop transitions, 618 changer transitions 2/1513 dead transitions. [2022-11-16 12:06:32,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1513 transitions, 19972 flow [2022-11-16 12:06:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-16 12:06:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-16 12:06:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 11970 transitions. [2022-11-16 12:06:32,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8435517970401691 [2022-11-16 12:06:32,154 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 11970 transitions. [2022-11-16 12:06:32,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 11970 transitions. [2022-11-16 12:06:32,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:32,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 11970 transitions. [2022-11-16 12:06:32,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 139.1860465116279) internal successors, (11970), 86 states have internal predecessors, (11970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:32,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 165.0) internal successors, (14355), 87 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:32,189 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 165.0) internal successors, (14355), 87 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:32,190 INFO L175 Difference]: Start difference. First operand has 501 places, 693 transitions, 8002 flow. Second operand 86 states and 11970 transitions. [2022-11-16 12:06:32,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1513 transitions, 19972 flow [2022-11-16 12:06:35,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1513 transitions, 19602 flow, removed 14 selfloop flow, removed 20 redundant places. [2022-11-16 12:06:35,658 INFO L231 Difference]: Finished difference. Result has 591 places, 1067 transitions, 14255 flow [2022-11-16 12:06:35,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7796, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=14255, PETRI_PLACES=591, PETRI_TRANSITIONS=1067} [2022-11-16 12:06:35,659 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 443 predicate places. [2022-11-16 12:06:35,659 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 1067 transitions, 14255 flow [2022-11-16 12:06:35,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:35,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:35,660 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:35,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:35,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:35,861 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:06:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash 810346417, now seen corresponding path program 9 times [2022-11-16 12:06:35,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:35,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441483524] [2022-11-16 12:06:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:35,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:36,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441483524] [2022-11-16 12:06:36,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441483524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:36,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559299314] [2022-11-16 12:06:36,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:06:36,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:36,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:36,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:36,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c61618c-219f-4a97-abab-54549dfbfaf0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:06:36,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:06:36,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:06:36,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:36,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:36,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559299314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:36,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:36,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-16 12:06:36,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723443589] [2022-11-16 12:06:36,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:36,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:06:36,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:06:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:06:36,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-16 12:06:36,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 1067 transitions, 14255 flow. Second operand has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:36,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:36,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-16 12:06:36,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:47,674 INFO L130 PetriNetUnfolder]: 8089/23724 cut-off events. [2022-11-16 12:06:47,674 INFO L131 PetriNetUnfolder]: For 258902/258916 co-relation queries the response was YES. [2022-11-16 12:06:48,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140288 conditions, 23724 events. 8089/23724 cut-off events. For 258902/258916 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 280309 event pairs, 1358 based on Foata normal form. 10/23580 useless extension candidates. Maximal degree in co-relation 140163. Up to 12071 conditions per place. [2022-11-16 12:06:48,272 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 819 selfloop transitions, 202 changer transitions 13/1191 dead transitions. [2022-11-16 12:06:48,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 1191 transitions, 17533 flow [2022-11-16 12:06:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:06:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-16 12:06:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2247 transitions. [2022-11-16 12:06:48,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8511363636363637 [2022-11-16 12:06:48,275 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2247 transitions. [2022-11-16 12:06:48,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2247 transitions. [2022-11-16 12:06:48,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:48,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2247 transitions. [2022-11-16 12:06:48,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 140.4375) internal successors, (2247), 16 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:48,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:48,283 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:48,283 INFO L175 Difference]: Start difference. First operand has 591 places, 1067 transitions, 14255 flow. Second operand 16 states and 2247 transitions. [2022-11-16 12:06:48,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 1191 transitions, 17533 flow