./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ --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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- 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-dbf71c6-m [2022-10-17 10:33:44,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:33:44,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:33:44,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:33:44,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:33:44,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:33:44,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:33:44,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:33:44,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:33:44,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:33:44,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:33:44,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:33:44,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:33:44,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:33:44,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:33:44,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:33:44,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:33:44,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:33:44,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:33:44,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:33:44,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:33:44,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:33:44,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:33:44,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:33:44,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:33:44,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:33:44,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:33:44,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:33:44,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:33:44,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:33:44,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:33:44,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:33:44,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:33:44,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:33:44,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:33:44,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:33:44,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:33:44,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:33:44,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:33:44,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:33:44,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:33:44,333 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:33:44,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:33:44,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:33:44,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:33:44,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:33:44,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:33:44,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:33:44,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:33:44,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:33:44,378 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:33:44,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:33:44,380 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:33:44,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:33:44,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:33:44,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:33:44,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:33:44,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:33:44,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:33:44,381 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:33:44,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:33:44,382 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:33:44,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:33:44,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:33:44,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:33:44,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:33:44,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:33:44,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:33:44,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:33:44,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:33:44,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:33:44,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:33:44,394 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:33:44,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:33:44,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:33:44,395 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_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-10-17 10:33:44,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:33:44,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:33:44,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:33:44,715 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:33:44,716 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:33:44,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-10-17 10:33:44,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/data/f783422aa/127b1c82b5f1428dab8bd789de3c6937/FLAGff52e0376 [2022-10-17 10:33:45,260 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:33:45,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-10-17 10:33:45,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/data/f783422aa/127b1c82b5f1428dab8bd789de3c6937/FLAGff52e0376 [2022-10-17 10:33:45,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/data/f783422aa/127b1c82b5f1428dab8bd789de3c6937 [2022-10-17 10:33:45,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:33:45,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:33:45,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:33:45,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:33:45,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:33:45,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:33:45" (1/1) ... [2022-10-17 10:33:45,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3fd2d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:45, skipping insertion in model container [2022-10-17 10:33:45,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:33:45" (1/1) ... [2022-10-17 10:33:45,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:33:45,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:33:45,935 WARN L230 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_63d40e91-f022-451b-a715-7ab9cc2e7d07/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-10-17 10:33:45,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:33:45,949 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:33:45,988 WARN L230 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_63d40e91-f022-451b-a715-7ab9cc2e7d07/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-10-17 10:33:45,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:33:46,016 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:33:46,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46 WrapperNode [2022-10-17 10:33:46,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:33:46,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:33:46,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:33:46,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:33:46,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,058 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-10-17 10:33:46,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:33:46,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:33:46,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:33:46,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:33:46,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,083 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:33:46,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:33:46,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:33:46,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:33:46,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (1/1) ... [2022-10-17 10:33:46,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:33:46,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:33:46,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:33:46,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:33:46,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:33:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 10:33:46,189 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 10:33:46,189 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 10:33:46,189 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 10:33:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:33:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:33:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:33:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 10:33:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 10:33:46,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:33:46,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:33:46,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:33:46,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:33:46,193 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:33:46,282 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:33:46,284 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:33:46,461 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:33:46,500 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:33:46,500 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:33:46,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:33:46 BoogieIcfgContainer [2022-10-17 10:33:46,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:33:46,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:33:46,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:33:46,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:33:46,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:33:45" (1/3) ... [2022-10-17 10:33:46,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbc7dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:33:46, skipping insertion in model container [2022-10-17 10:33:46,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:46" (2/3) ... [2022-10-17 10:33:46,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bbc7dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:33:46, skipping insertion in model container [2022-10-17 10:33:46,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:33:46" (3/3) ... [2022-10-17 10:33:46,514 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-10-17 10:33:46,525 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:33:46,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:33:46,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:33:46,537 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:33:46,611 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:33:46,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-10-17 10:33:46,835 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-10-17 10:33:46,840 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:33:46,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-10-17 10:33:46,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-10-17 10:33:46,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-10-17 10:33:46,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:33:46,899 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;@1596b956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:33:46,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:33:46,964 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-10-17 10:33:46,970 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:33:46,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:46,971 INFO L208 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] [2022-10-17 10:33:46,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:46,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1997320056, now seen corresponding path program 1 times [2022-10-17 10:33:46,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:46,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307954081] [2022-10-17 10:33:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:46,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:48,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:48,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307954081] [2022-10-17 10:33:48,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307954081] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:33:48,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:33:48,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:33:48,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574621767] [2022-10-17 10:33:48,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:33:48,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:33:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:33:48,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:33:48,155 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-10-17 10:33:48,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:48,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-10-17 10:33:48,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:33:48,284 INFO L130 PetriNetUnfolder]: 8/110 cut-off events. [2022-10-17 10:33:48,284 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-10-17 10:33:48,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 110 events. 8/110 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 1 based on Foata normal form. 15/117 useless extension candidates. Maximal degree in co-relation 62. Up to 18 conditions per place. [2022-10-17 10:33:48,287 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 15 selfloop transitions, 2 changer transitions 8/80 dead transitions. [2022-10-17 10:33:48,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 231 flow [2022-10-17 10:33:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:33:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:33:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2022-10-17 10:33:48,306 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8029556650246306 [2022-10-17 10:33:48,307 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2022-10-17 10:33:48,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2022-10-17 10:33:48,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:33:48,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2022-10-17 10:33:48,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,328 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,330 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 7 states and 489 transitions. [2022-10-17 10:33:48,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 231 flow [2022-10-17 10:33:48,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 217 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 10:33:48,340 INFO L231 Difference]: Finished difference. Result has 82 places, 71 transitions, 162 flow [2022-10-17 10:33:48,342 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=82, PETRI_TRANSITIONS=71} [2022-10-17 10:33:48,347 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-10-17 10:33:48,347 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 71 transitions, 162 flow [2022-10-17 10:33:48,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:48,348 INFO L208 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] [2022-10-17 10:33:48,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:33:48,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:48,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2080326486, now seen corresponding path program 1 times [2022-10-17 10:33:48,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:48,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337955060] [2022-10-17 10:33:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:48,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:48,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:48,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337955060] [2022-10-17 10:33:48,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337955060] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:33:48,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:33:48,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:33:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880906380] [2022-10-17 10:33:48,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:33:48,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:33:48,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:33:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:33:48,682 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-10-17 10:33:48,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 71 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:48,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-10-17 10:33:48,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:33:48,836 INFO L130 PetriNetUnfolder]: 74/272 cut-off events. [2022-10-17 10:33:48,836 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-10-17 10:33:48,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 272 events. 74/272 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1179 event pairs, 22 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 468. Up to 95 conditions per place. [2022-10-17 10:33:48,841 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 31 selfloop transitions, 7 changer transitions 4/96 dead transitions. [2022-10-17 10:33:48,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 305 flow [2022-10-17 10:33:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:33:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:33:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2022-10-17 10:33:48,844 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8482758620689655 [2022-10-17 10:33:48,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2022-10-17 10:33:48,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2022-10-17 10:33:48,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:33:48,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2022-10-17 10:33:48,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,849 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,849 INFO L175 Difference]: Start difference. First operand has 82 places, 71 transitions, 162 flow. Second operand 5 states and 369 transitions. [2022-10-17 10:33:48,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 305 flow [2022-10-17 10:33:48,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 299 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-10-17 10:33:48,854 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 207 flow [2022-10-17 10:33:48,854 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2022-10-17 10:33:48,855 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-10-17 10:33:48,856 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 207 flow [2022-10-17 10:33:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:48,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:48,857 INFO L208 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] [2022-10-17 10:33:48,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:33:48,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash 929170576, now seen corresponding path program 2 times [2022-10-17 10:33:48,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:48,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819327150] [2022-10-17 10:33:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:48,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:49,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:49,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819327150] [2022-10-17 10:33:49,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819327150] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:33:49,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551517495] [2022-10-17 10:33:49,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:33:49,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:49,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:33:49,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:33:49,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:33:49,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:33:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:33:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:33:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:33:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:49,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:33:49,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551517495] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:33:49,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:33:49,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-10-17 10:33:49,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314347744] [2022-10-17 10:33:49,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:33:49,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:33:49,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:33:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:33:49,317 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-10-17 10:33:49,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:49,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:49,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-10-17 10:33:49,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:33:49,431 INFO L130 PetriNetUnfolder]: 64/245 cut-off events. [2022-10-17 10:33:49,432 INFO L131 PetriNetUnfolder]: For 75/81 co-relation queries the response was YES. [2022-10-17 10:33:49,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 245 events. 64/245 cut-off events. For 75/81 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1063 event pairs, 19 based on Foata normal form. 7/239 useless extension candidates. Maximal degree in co-relation 365. Up to 74 conditions per place. [2022-10-17 10:33:49,436 INFO L137 encePairwiseOnDemand]: 82/87 looper letters, 23 selfloop transitions, 7 changer transitions 3/92 dead transitions. [2022-10-17 10:33:49,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 92 transitions, 329 flow [2022-10-17 10:33:49,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:33:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:33:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 302 transitions. [2022-10-17 10:33:49,439 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.867816091954023 [2022-10-17 10:33:49,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 302 transitions. [2022-10-17 10:33:49,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 302 transitions. [2022-10-17 10:33:49,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:33:49,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 302 transitions. [2022-10-17 10:33:49,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:49,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:49,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:49,443 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 207 flow. Second operand 4 states and 302 transitions. [2022-10-17 10:33:49,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 92 transitions, 329 flow [2022-10-17 10:33:49,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:33:49,449 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 263 flow [2022-10-17 10:33:49,450 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2022-10-17 10:33:49,451 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2022-10-17 10:33:49,451 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 263 flow [2022-10-17 10:33:49,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:49,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:49,452 INFO L208 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] [2022-10-17 10:33:49,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:33:49,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:49,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1132170860, now seen corresponding path program 3 times [2022-10-17 10:33:49,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938800171] [2022-10-17 10:33:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:49,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:49,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:49,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938800171] [2022-10-17 10:33:49,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938800171] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:33:49,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:33:49,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:33:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835470242] [2022-10-17 10:33:49,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:33:49,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:33:49,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:33:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:33:49,855 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-10-17 10:33:49,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:49,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:49,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-10-17 10:33:49,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:33:50,047 INFO L130 PetriNetUnfolder]: 127/424 cut-off events. [2022-10-17 10:33:50,048 INFO L131 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2022-10-17 10:33:50,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 424 events. 127/424 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2145 event pairs, 52 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 752. Up to 125 conditions per place. [2022-10-17 10:33:50,058 INFO L137 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 4/104 dead transitions. [2022-10-17 10:33:50,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 104 transitions, 460 flow [2022-10-17 10:33:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:33:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:33:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-10-17 10:33:50,062 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-10-17 10:33:50,069 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-10-17 10:33:50,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-10-17 10:33:50,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:33:50,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-10-17 10:33:50,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:50,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:50,076 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:50,076 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 263 flow. Second operand 6 states and 429 transitions. [2022-10-17 10:33:50,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 104 transitions, 460 flow [2022-10-17 10:33:50,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 452 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-10-17 10:33:50,090 INFO L231 Difference]: Finished difference. Result has 94 places, 83 transitions, 305 flow [2022-10-17 10:33:50,091 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2022-10-17 10:33:50,093 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 17 predicate places. [2022-10-17 10:33:50,093 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 305 flow [2022-10-17 10:33:50,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:50,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:50,094 INFO L208 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] [2022-10-17 10:33:50,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:33:50,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1391320060, now seen corresponding path program 4 times [2022-10-17 10:33:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:50,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133416904] [2022-10-17 10:33:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:50,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:50,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:50,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133416904] [2022-10-17 10:33:50,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133416904] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:33:50,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728128535] [2022-10-17 10:33:50,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:33:50,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:50,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:33:50,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:33:50,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:33:50,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:33:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:33:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:33:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:33:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:50,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:33:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:50,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728128535] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:33:50,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:33:50,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-10-17 10:33:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450527173] [2022-10-17 10:33:50,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:33:50,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:33:50,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:33:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:33:50,744 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-10-17 10:33:50,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:50,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:50,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-10-17 10:33:50,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:33:51,099 INFO L130 PetriNetUnfolder]: 209/644 cut-off events. [2022-10-17 10:33:51,099 INFO L131 PetriNetUnfolder]: For 775/784 co-relation queries the response was YES. [2022-10-17 10:33:51,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 644 events. 209/644 cut-off events. For 775/784 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3872 event pairs, 19 based on Foata normal form. 8/641 useless extension candidates. Maximal degree in co-relation 1171. Up to 100 conditions per place. [2022-10-17 10:33:51,107 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 53 selfloop transitions, 36 changer transitions 10/153 dead transitions. [2022-10-17 10:33:51,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 153 transitions, 848 flow [2022-10-17 10:33:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:33:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-10-17 10:33:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 736 transitions. [2022-10-17 10:33:51,111 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8459770114942529 [2022-10-17 10:33:51,112 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 736 transitions. [2022-10-17 10:33:51,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 736 transitions. [2022-10-17 10:33:51,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:33:51,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 736 transitions. [2022-10-17 10:33:51,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,119 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,119 INFO L175 Difference]: Start difference. First operand has 94 places, 83 transitions, 305 flow. Second operand 10 states and 736 transitions. [2022-10-17 10:33:51,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 153 transitions, 848 flow [2022-10-17 10:33:51,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 153 transitions, 817 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-10-17 10:33:51,127 INFO L231 Difference]: Finished difference. Result has 108 places, 107 transitions, 610 flow [2022-10-17 10:33:51,128 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=610, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2022-10-17 10:33:51,129 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 31 predicate places. [2022-10-17 10:33:51,129 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 610 flow [2022-10-17 10:33:51,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:51,130 INFO L208 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] [2022-10-17 10:33:51,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:33:51,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:51,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:51,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash -618851906, now seen corresponding path program 5 times [2022-10-17 10:33:51,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:51,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945912543] [2022-10-17 10:33:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:51,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:51,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:51,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945912543] [2022-10-17 10:33:51,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945912543] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:33:51,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:33:51,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:33:51,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271201813] [2022-10-17 10:33:51,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:33:51,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:33:51,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:33:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:33:51,567 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-10-17 10:33:51,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:51,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-10-17 10:33:51,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:33:51,852 INFO L130 PetriNetUnfolder]: 207/624 cut-off events. [2022-10-17 10:33:51,852 INFO L131 PetriNetUnfolder]: For 1956/1960 co-relation queries the response was YES. [2022-10-17 10:33:51,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 624 events. 207/624 cut-off events. For 1956/1960 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3651 event pairs, 81 based on Foata normal form. 8/620 useless extension candidates. Maximal degree in co-relation 1629. Up to 229 conditions per place. [2022-10-17 10:33:51,863 INFO L137 encePairwiseOnDemand]: 80/87 looper letters, 47 selfloop transitions, 27 changer transitions 7/135 dead transitions. [2022-10-17 10:33:51,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 946 flow [2022-10-17 10:33:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:33:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:33:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 442 transitions. [2022-10-17 10:33:51,866 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8467432950191571 [2022-10-17 10:33:51,867 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 442 transitions. [2022-10-17 10:33:51,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 442 transitions. [2022-10-17 10:33:51,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:33:51,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 442 transitions. [2022-10-17 10:33:51,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,872 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,873 INFO L175 Difference]: Start difference. First operand has 108 places, 107 transitions, 610 flow. Second operand 6 states and 442 transitions. [2022-10-17 10:33:51,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 946 flow [2022-10-17 10:33:51,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 135 transitions, 920 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-10-17 10:33:51,894 INFO L231 Difference]: Finished difference. Result has 115 places, 111 transitions, 710 flow [2022-10-17 10:33:51,895 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=710, PETRI_PLACES=115, PETRI_TRANSITIONS=111} [2022-10-17 10:33:51,898 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2022-10-17 10:33:51,898 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 111 transitions, 710 flow [2022-10-17 10:33:51,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:51,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:51,899 INFO L208 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] [2022-10-17 10:33:51,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:33:51,900 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1603200416, now seen corresponding path program 1 times [2022-10-17 10:33:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:51,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791788571] [2022-10-17 10:33:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:51,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:52,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:52,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791788571] [2022-10-17 10:33:52,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791788571] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:33:52,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547695048] [2022-10-17 10:33:52,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:52,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:52,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:33:52,195 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:33:52,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:33:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:33:52,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:33:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:33:52,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:33:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:33:52,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547695048] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:33:52,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:33:52,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-10-17 10:33:52,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435125098] [2022-10-17 10:33:52,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:33:52,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:33:52,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:52,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:33:52,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:33:52,534 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-10-17 10:33:52,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 111 transitions, 710 flow. Second operand has 9 states, 9 states have (on average 66.88888888888889) internal successors, (602), 9 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:52,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:52,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-10-17 10:33:52,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:33:52,765 INFO L130 PetriNetUnfolder]: 108/637 cut-off events. [2022-10-17 10:33:52,765 INFO L131 PetriNetUnfolder]: For 1574/1604 co-relation queries the response was YES. [2022-10-17 10:33:52,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 637 events. 108/637 cut-off events. For 1574/1604 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4282 event pairs, 18 based on Foata normal form. 12/639 useless extension candidates. Maximal degree in co-relation 1476. Up to 88 conditions per place. [2022-10-17 10:33:52,776 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 23 selfloop transitions, 7 changer transitions 4/126 dead transitions. [2022-10-17 10:33:52,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 818 flow [2022-10-17 10:33:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:33:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:33:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2022-10-17 10:33:52,779 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2022-10-17 10:33:52,780 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2022-10-17 10:33:52,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2022-10-17 10:33:52,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:33:52,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2022-10-17 10:33:52,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:52,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:52,787 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:52,787 INFO L175 Difference]: Start difference. First operand has 115 places, 111 transitions, 710 flow. Second operand 7 states and 476 transitions. [2022-10-17 10:33:52,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 818 flow [2022-10-17 10:33:52,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 126 transitions, 755 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-10-17 10:33:52,803 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 691 flow [2022-10-17 10:33:52,803 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=691, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-10-17 10:33:52,804 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-10-17 10:33:52,804 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 691 flow [2022-10-17 10:33:52,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 66.88888888888889) internal successors, (602), 9 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:52,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:52,806 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:33:52,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:33:53,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:53,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1085083688, now seen corresponding path program 2 times [2022-10-17 10:33:53,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:53,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237421629] [2022-10-17 10:33:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:53,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:53,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237421629] [2022-10-17 10:33:53,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237421629] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:33:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722146219] [2022-10-17 10:33:53,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:33:53,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:53,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:33:53,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:33:53,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:33:53,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:33:53,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:33:53,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:33:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:33:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:53,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:33:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:54,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722146219] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:33:54,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:33:54,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-10-17 10:33:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077290882] [2022-10-17 10:33:54,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:33:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:33:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:54,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:33:54,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:33:54,031 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-10-17 10:33:54,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 691 flow. Second operand has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:54,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:54,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-10-17 10:33:54,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:33:58,032 INFO L130 PetriNetUnfolder]: 874/2550 cut-off events. [2022-10-17 10:33:58,032 INFO L131 PetriNetUnfolder]: For 6810/6828 co-relation queries the response was YES. [2022-10-17 10:33:58,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8428 conditions, 2550 events. 874/2550 cut-off events. For 6810/6828 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20235 event pairs, 53 based on Foata normal form. 32/2575 useless extension candidates. Maximal degree in co-relation 8371. Up to 307 conditions per place. [2022-10-17 10:33:58,066 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 173 selfloop transitions, 210 changer transitions 30/467 dead transitions. [2022-10-17 10:33:58,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 467 transitions, 3820 flow [2022-10-17 10:33:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-10-17 10:33:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-10-17 10:33:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 5021 transitions. [2022-10-17 10:33:58,086 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7799005902454178 [2022-10-17 10:33:58,086 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 5021 transitions. [2022-10-17 10:33:58,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 5021 transitions. [2022-10-17 10:33:58,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:33:58,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 5021 transitions. [2022-10-17 10:33:58,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 67.85135135135135) internal successors, (5021), 74 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:58,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:58,136 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:58,136 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 691 flow. Second operand 74 states and 5021 transitions. [2022-10-17 10:33:58,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 467 transitions, 3820 flow [2022-10-17 10:33:58,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 467 transitions, 3754 flow, removed 32 selfloop flow, removed 3 redundant places. [2022-10-17 10:33:58,180 INFO L231 Difference]: Finished difference. Result has 222 places, 305 transitions, 2784 flow [2022-10-17 10:33:58,181 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=2784, PETRI_PLACES=222, PETRI_TRANSITIONS=305} [2022-10-17 10:33:58,184 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 145 predicate places. [2022-10-17 10:33:58,184 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 305 transitions, 2784 flow [2022-10-17 10:33:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:33:58,186 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:33:58,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:33:58,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:58,411 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:33:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1629441692, now seen corresponding path program 3 times [2022-10-17 10:33:58,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:58,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370192315] [2022-10-17 10:33:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:58,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:58,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:58,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370192315] [2022-10-17 10:33:58,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370192315] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:33:58,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216003720] [2022-10-17 10:33:58,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:33:58,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:33:58,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:33:58,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:33:58,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:33:58,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 10:33:58,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:33:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:33:58,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:33:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:59,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:33:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:59,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216003720] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:33:59,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:33:59,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-10-17 10:33:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651106678] [2022-10-17 10:33:59,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:33:59,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 10:33:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 10:33:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:33:59,302 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-10-17 10:33:59,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 305 transitions, 2784 flow. Second operand has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:59,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:33:59,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-10-17 10:33:59,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:34:01,980 INFO L130 PetriNetUnfolder]: 1245/3372 cut-off events. [2022-10-17 10:34:01,980 INFO L131 PetriNetUnfolder]: For 39225/39243 co-relation queries the response was YES. [2022-10-17 10:34:02,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18061 conditions, 3372 events. 1245/3372 cut-off events. For 39225/39243 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 27881 event pairs, 51 based on Foata normal form. 40/3391 useless extension candidates. Maximal degree in co-relation 16469. Up to 470 conditions per place. [2022-10-17 10:34:02,053 INFO L137 encePairwiseOnDemand]: 76/87 looper letters, 183 selfloop transitions, 448 changer transitions 12/697 dead transitions. [2022-10-17 10:34:02,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 697 transitions, 8669 flow [2022-10-17 10:34:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-10-17 10:34:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-10-17 10:34:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3176 transitions. [2022-10-17 10:34:02,060 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7767180239667401 [2022-10-17 10:34:02,060 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3176 transitions. [2022-10-17 10:34:02,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3176 transitions. [2022-10-17 10:34:02,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:34:02,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3176 transitions. [2022-10-17 10:34:02,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.57446808510639) internal successors, (3176), 47 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:02,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:02,085 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:02,085 INFO L175 Difference]: Start difference. First operand has 222 places, 305 transitions, 2784 flow. Second operand 47 states and 3176 transitions. [2022-10-17 10:34:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 697 transitions, 8669 flow [2022-10-17 10:34:02,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 697 transitions, 7680 flow, removed 412 selfloop flow, removed 7 redundant places. [2022-10-17 10:34:02,505 INFO L231 Difference]: Finished difference. Result has 284 places, 569 transitions, 6292 flow [2022-10-17 10:34:02,505 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=6292, PETRI_PLACES=284, PETRI_TRANSITIONS=569} [2022-10-17 10:34:02,506 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 207 predicate places. [2022-10-17 10:34:02,506 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 569 transitions, 6292 flow [2022-10-17 10:34:02,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:02,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:34:02,508 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:34:02,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:34:02,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 10:34:02,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:34:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:34:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash -628109524, now seen corresponding path program 4 times [2022-10-17 10:34:02,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:34:02,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157704631] [2022-10-17 10:34:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:34:02,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:34:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:34:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:34:03,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:34:03,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157704631] [2022-10-17 10:34:03,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157704631] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:34:03,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026289824] [2022-10-17 10:34:03,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:34:03,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:34:03,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:34:03,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:34:03,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:34:03,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:34:03,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:34:03,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:34:03,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:34:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:34:03,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:34:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:34:03,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026289824] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:34:03,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:34:03,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-10-17 10:34:03,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743348028] [2022-10-17 10:34:03,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:34:03,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-17 10:34:03,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:34:03,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-17 10:34:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:34:03,436 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-10-17 10:34:03,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 569 transitions, 6292 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:03,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:34:03,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-10-17 10:34:03,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:34:07,065 INFO L130 PetriNetUnfolder]: 1578/4359 cut-off events. [2022-10-17 10:34:07,066 INFO L131 PetriNetUnfolder]: For 72501/72521 co-relation queries the response was YES. [2022-10-17 10:34:07,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25806 conditions, 4359 events. 1578/4359 cut-off events. For 72501/72521 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 38631 event pairs, 12 based on Foata normal form. 31/4379 useless extension candidates. Maximal degree in co-relation 24139. Up to 459 conditions per place. [2022-10-17 10:34:07,177 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 349 selfloop transitions, 575 changer transitions 70/1048 dead transitions. [2022-10-17 10:34:07,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1048 transitions, 15045 flow [2022-10-17 10:34:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-10-17 10:34:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-10-17 10:34:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5047 transitions. [2022-10-17 10:34:07,191 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7734865900383142 [2022-10-17 10:34:07,191 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5047 transitions. [2022-10-17 10:34:07,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5047 transitions. [2022-10-17 10:34:07,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:34:07,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5047 transitions. [2022-10-17 10:34:07,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 67.29333333333334) internal successors, (5047), 75 states have internal predecessors, (5047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:07,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:07,230 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:07,230 INFO L175 Difference]: Start difference. First operand has 284 places, 569 transitions, 6292 flow. Second operand 75 states and 5047 transitions. [2022-10-17 10:34:07,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1048 transitions, 15045 flow [2022-10-17 10:34:07,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1048 transitions, 13974 flow, removed 327 selfloop flow, removed 2 redundant places. [2022-10-17 10:34:07,943 INFO L231 Difference]: Finished difference. Result has 387 places, 826 transitions, 10734 flow [2022-10-17 10:34:07,945 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=10734, PETRI_PLACES=387, PETRI_TRANSITIONS=826} [2022-10-17 10:34:07,945 INFO L287 CegarLoopForPetriNet]: 77 programPoint places, 310 predicate places. [2022-10-17 10:34:07,946 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 826 transitions, 10734 flow [2022-10-17 10:34:07,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:07,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:34:07,948 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:34:07,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-10-17 10:34:08,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:34:08,175 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:34:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:34:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1545791958, now seen corresponding path program 5 times [2022-10-17 10:34:08,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:34:08,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948863661] [2022-10-17 10:34:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:34:08,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:34:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:34:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:34:08,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:34:08,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948863661] [2022-10-17 10:34:08,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948863661] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:34:08,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171236340] [2022-10-17 10:34:08,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:34:08,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:34:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:34:08,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:34:08,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d40e91-f022-451b-a715-7ab9cc2e7d07/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:34:08,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-10-17 10:34:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:34:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:34:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:34:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:34:08,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:34:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:34:09,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171236340] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:34:09,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:34:09,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-10-17 10:34:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535891014] [2022-10-17 10:34:09,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:34:09,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:34:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:34:09,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:34:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:34:09,036 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-10-17 10:34:09,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 826 transitions, 10734 flow. Second operand has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:09,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:34:09,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-10-17 10:34:09,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:34:13,793 INFO L130 PetriNetUnfolder]: 2013/5307 cut-off events. [2022-10-17 10:34:13,794 INFO L131 PetriNetUnfolder]: For 147135/147163 co-relation queries the response was YES. [2022-10-17 10:34:13,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36569 conditions, 5307 events. 2013/5307 cut-off events. For 147135/147163 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 47665 event pairs, 52 based on Foata normal form. 59/5343 useless extension candidates. Maximal degree in co-relation 36447. Up to 588 conditions per place. [2022-10-17 10:34:13,944 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 294 selfloop transitions, 957 changer transitions 2/1307 dead transitions. [2022-10-17 10:34:13,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1307 transitions, 20565 flow [2022-10-17 10:34:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-10-17 10:34:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-10-17 10:34:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4171 transitions. [2022-10-17 10:34:13,953 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7732665925101965 [2022-10-17 10:34:13,954 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4171 transitions. [2022-10-17 10:34:13,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4171 transitions. [2022-10-17 10:34:14,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:34:14,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4171 transitions. [2022-10-17 10:34:14,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.2741935483871) internal successors, (4171), 62 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:14,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:14,089 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:34:14,089 INFO L175 Difference]: Start difference. First operand has 387 places, 826 transitions, 10734 flow. Second operand 62 states and 4171 transitions. [2022-10-17 10:34:14,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1307 transitions, 20565 flow